wasm: add recover support

Add unwinding and recover support for wasm using WebAssembly exception handling. This still has a few gotchas: * Many WASI systems don't support exception handling yet. For example, see: https://github.com/bytecodealliance/wasmtime/issues/2049 * Asyncify doesn't support wasm exception handling: https://github.com/WebAssembly/binaryen/issues/4470 This means it's not possible to use goroutines together with panic/recover. * The current way that exceptions are implemented pretend to be C++ exceptions, but work slightly differently. If C++ code is called (for example through CGo) that raises an exception, that exception will be eaten by TinyGo and not be propagated. This is fixable, it just hasn't been implemented (because we don't actually support C++ right now). I hope that these issues will be resolved over time. At least for now, people who need `recover()` have a way to use it.
compiler: support panics inside indirect deferred functions
2026-07-26 14:48:40 +00:00 · 2024-08-14 14:22:37 +02:00 · 2024-08-14 14:20:44 +02:00 · 2024-08-14 12:00:55 +02:00 · 2024-08-13 10:46:29 +02:00 · 2024-08-12 14:24:38 -07:00
308 changed files with 11686 additions and 1436 deletions
@@ -98,12 +98,14 @@ commands:
            - /go/pkg/mod

 jobs:
-  test-llvm15-go118:
+  test-llvm15-go119:
    docker:
-      - image: golang:1.18-bullseye
+      - image: golang:1.19-bullseye
    steps:
      - test-linux:
          llvm: "15"
+          # "make lint" fails before go 1.21 because internal/tools/go.mod specifies packages that require go 1.21
+          fmt-check: false
    resource_class: large
  test-llvm18-go122:
    docker:
@@ -118,6 +120,6 @@ workflows:
    jobs:
      # This tests our lowest supported versions of Go and LLVM, to make sure at
      # least the smoke tests still pass.
-      - test-llvm15-go118
+      - test-llvm15-go119
      # This tests LLVM 18 support when linking against system libraries.
      - test-llvm18-go122
@@ -68,7 +68,7 @@ jobs:
        uses: actions/cache/restore@v4
        id: cache-llvm-build
        with:
-          key: llvm-build-18-${{ matrix.os }}-v2
+          key: llvm-build-18-${{ matrix.os }}-v3
          path: llvm-build
      - name: Build LLVM
        if: steps.cache-llvm-build.outputs.cache-hit != 'true'
@@ -68,7 +68,7 @@ jobs:
        uses: actions/cache/restore@v4
        id: cache-llvm-build
        with:
-          key: llvm-build-18-linux-alpine-v1
+          key: llvm-build-18-linux-alpine-v2
          path: llvm-build
      - name: Build LLVM
        if: steps.cache-llvm-build.outputs.cache-hit != 'true'
@@ -115,6 +115,8 @@ jobs:
          gem install --no-document fpm
      - name: Run linter
        run: make lint
+      - name: Run spellcheck
+        run: make spell
      - name: Build TinyGo release
        run: |
          make release deb -j3 STATIC=1
@@ -134,17 +136,19 @@ jobs:
    steps:
      - name: Checkout
        uses: actions/checkout@v4
+        with:
+          submodules: true
      - name: Install Go
        uses: actions/setup-go@v5
        with:
          go-version: '1.22'
          cache: true
      - name: Install wasmtime
-        run: |
-          mkdir -p $HOME/.wasmtime $HOME/.wasmtime/bin
-          curl https://github.com/bytecodealliance/wasmtime/releases/download/v14.0.4/wasmtime-v14.0.4-x86_64-linux.tar.xz -o wasmtime-v14.0.4-x86_64-linux.tar.xz -SfL
-          tar -C $HOME/.wasmtime/bin --wildcards -xf wasmtime-v14.0.4-x86_64-linux.tar.xz --strip-components=1 wasmtime-v14.0.4-x86_64-linux/*
-          echo "$HOME/.wasmtime/bin" >> $GITHUB_PATH
+        uses: bytecodealliance/actions/wasmtime/setup@v1
+        with:
+          version: "19.0.1"
+      - name: Install wasm-tools
+        uses: bytecodealliance/actions/wasm-tools/setup@v1
      - name: Download release artifact
        uses: actions/download-artifact@v4
        with:
@@ -154,8 +158,8 @@ jobs:
          mkdir -p ~/lib
          tar -C ~/lib -xf tinygo.linux-amd64.tar.gz
          ln -s ~/lib/tinygo/bin/tinygo ~/go/bin/tinygo
-      - run: make tinygo-test-wasi-fast
      - run: make tinygo-test-wasip1-fast
+      - run: make tinygo-test-wasip2-fast
      - run: make smoketest
  assert-test-linux:
    # Run all tests that can run on Linux, with LLVM assertions enabled to catch
@@ -187,11 +191,11 @@ jobs:
        with:
          node-version: '18'
      - name: Install wasmtime
-        run: |
-          mkdir -p $HOME/.wasmtime $HOME/.wasmtime/bin
-          curl -L https://github.com/bytecodealliance/wasmtime/releases/download/v14.0.4/wasmtime-v14.0.4-x86_64-linux.tar.xz -o wasmtime-v14.0.4-x86_64-linux.tar.xz -SfL
-          tar -C $HOME/.wasmtime/bin --wildcards -xf wasmtime-v14.0.4-x86_64-linux.tar.xz --strip-components=1 wasmtime-v14.0.4-x86_64-linux/*
-          echo "$HOME/.wasmtime/bin" >> $GITHUB_PATH
+        uses: bytecodealliance/actions/wasmtime/setup@v1
+        with:
+          version: "19.0.1"
+      - name: Setup `wasm-tools`
+        uses: bytecodealliance/actions/wasm-tools/setup@v1
      - name: Restore LLVM source cache
        uses: actions/cache/restore@v4
        id: cache-llvm-source
@@ -221,7 +225,7 @@ jobs:
        uses: actions/cache/restore@v4
        id: cache-llvm-build
        with:
-          key: llvm-build-18-linux-asserts-v1
+          key: llvm-build-18-linux-asserts-v2
          path: llvm-build
      - name: Build LLVM
        if: steps.cache-llvm-build.outputs.cache-hit != 'true'
@@ -334,7 +338,7 @@ jobs:
        uses: actions/cache/restore@v4
        id: cache-llvm-build
        with:
-          key: llvm-build-18-linux-${{ matrix.goarch }}-v1
+          key: llvm-build-18-linux-${{ matrix.goarch }}-v2
          path: llvm-build
      - name: Build LLVM
        if: steps.cache-llvm-build.outputs.cache-hit != 'true'
@@ -9,7 +9,7 @@ concurrency:

 jobs:
  sizediff:
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-24.04
    permissions:
      pull-requests: write
    steps:
@@ -66,7 +66,7 @@ jobs:
        uses: actions/cache/restore@v4
        id: cache-llvm-build
        with:
-          key: llvm-build-18-windows-v1
+          key: llvm-build-18-windows-v2
          path: llvm-build
      - name: Build LLVM
        if: steps.cache-llvm-build.outputs.cache-hit != 'true'
@@ -220,5 +220,5 @@ jobs:
        shell: bash
        working-directory: build
        run: 7z x release.zip -r
-      - name: Test stdlib packages on wasi
-        run: make tinygo-test-wasi-fast TINYGO=$(PWD)/build/tinygo/bin/tinygo
+      - name: Test stdlib packages on wasip1
+        run: make tinygo-test-wasip1-fast TINYGO=$(PWD)/build/tinygo/bin/tinygo
@@ -1,3 +1,8 @@
+.DS_Store
+.vscode
+go.work
+go.work.sum
+
 docs/_build
 src/device/avr/*.go
 src/device/avr/*.ld
@@ -17,7 +22,7 @@ src/device/kendryte/*.go
 src/device/kendryte/*.s
 src/device/rp/*.go
 src/device/rp/*.s
-vendor
+./vendor
 llvm-build
 llvm-project
 build/*
@@ -39,3 +39,6 @@
 	path = src/net
 	url = https://github.com/tinygo-org/net.git
 	branch = dev
+[submodule "lib/wasi-cli"]
+	path = lib/wasi-cli
+	url = https://github.com/WebAssembly/wasi-cli
@@ -18,7 +18,7 @@ tarball. If you want to help with development of TinyGo itself, you should follo
 LLVM, Clang and LLD are quite light on dependencies, requiring only standard
 build tools to be built. Go is of course necessary to build TinyGo itself.

-  * Go (1.18+)
+  * Go (1.19+)
  * GNU Make
  * Standard build tools (gcc/clang)
  * git
@@ -28,6 +28,21 @@ build tools to be built. Go is of course necessary to build TinyGo itself.
 The rest of this guide assumes you're running Linux, but it should be equivalent
 on a different system like Mac.

+## Using GNU Make
+
+The static build of TinyGo is driven by GNUmakefile, which provides a help target for quick reference:
+
+    % make help
+    clean                           Remove build directory
+    fmt                             Reformat source
+    fmt-check                       Warn if any source needs reformatting
+    gen-device                      Generate microcontroller-specific sources
+    llvm-source                     Get LLVM sources
+    llvm-build                      Build LLVM
+    tinygo                          Build the TinyGo compiler
+    lint                            Lint source tree
+    spell                           Spellcheck source tree
+
 ## Download the source

 The first step is to download the TinyGo sources (use `--recursive` if you clone
@@ -1,3 +1,61 @@
+0.32.0
+---
+
+* **general**
+  - fix wasi-libc include headers on Nix
+  - apply OpenOCD commands after target configuration
+  - fix a minor race condition when determining the build tags
+  - support UF2 drives with a space in their name on Linux
+  - add LLVM 18 support
+  - drop support for Go 1.18 to be able to stay up to date
+
+* **compiler**
+  - move `-panic=trap` support to the compiler/runtime
+  - fix symbol table index for WebAssembly archives
+  - fix ed25519 build errors by adjusting the alias names
+  - add aliases to generic AES functions
+  - fix race condition by temporarily applying a proposed patch
+  - `builder`: keep un-wasm-opt'd .wasm if -work was passed
+  - `builder`: make sure wasm-opt command line is printed if asked
+  - `cgo`: implement shift operations in preprocessor macros
+  - `interp`: checking for methodset existence
+
+* **standard library**
+  - `machine`: add `__tinygo_spi_tx` function to simulator
+  - `machine`: fix simulator I2C support
+  - `machine`: add GetRNG support to simulator
+  - `machine`: add `TxFifoFreeLevel` for CAN
+  - `os`: add `Link`
+  - `os`: add `FindProcess` for posix
+  - `os`: add `Process.Release` for unix
+  - `os`: add `SetReadDeadline` stub
+  - `os`, `os/signal`: add signal stubs
+  - `os/user`: add stubs for `Lookup{,Group}` and `Group`
+  - `reflect`: use int in `StringHeader` and `SliceHeader` on non-AVR platforms
+  - `reflect`: fix `NumMethods` for Interface type
+  - `runtime`: skip negative sleep durations in sleepTicks
+
+* **targets**
+  - `esp32`: add I2C support
+  - `rp2040`: move UART0 and UART1 to common file
+  - `rp2040`: make all RP2040 boards available for simulation
+  - `rp2040`: fix timeUnit type
+  - `stm32`: add i2c `Frequency` and `SetBaudRate` function for chips that were missing implementation
+  - `wasm-unknown`: add math and memory builtins that LLVM needs
+  - `wasip1`: replace existing `-target=wasi` support with wasip1 as supported in Go 1.21+
+
+* **boards**
+  - `adafruit-esp32-feather-v2`: add the Adafruit ESP32 Feather V2
+  - `badger2040-w`: add support for the Badger2040 W
+  - `feather-nrf52840-sense`: fix lack of LXFO
+  - `m5paper`: add support for the M5 Paper
+  - `mksnanov3`: limit programming speed to 1800 kHz
+  - `nucleol476rg`: add stm32 nucleol476rg support
+  - `pico-w`: add the Pico W (which is near-idential to the pico target)
+  - `thingplus-rp2040`, `waveshare-rp2040-zero`: add WS2812 definition
+  - `pca10059-s140v7`: add this variant to the PCA10059 board
+
+
 0.31.2
 ---

@@ -159,7 +217,7 @@
  - `reflect`: add SetZero
  - `reflect`: fix iterating over maps with interface{} keys
  - `reflect`: implement Value.Grow
-  - `reflect`: remove unecessary heap allocations
+  - `reflect`: remove unnecessary heap allocations
  - `reflect`: use .key() instead of a type assert
  - `sync`: add implementation from upstream Go for OnceFunc, OnceValue, and OnceValues
 * **targets**
@@ -175,17 +175,17 @@ ifneq ("$(wildcard $(LLVM_BUILDDIR)/bin/llvm-config*)","")
    CGO_LDFLAGS+=-L$(abspath $(LLVM_BUILDDIR)/lib) -lclang $(CLANG_LIBS) $(LLD_LIBS) $(shell $(LLVM_CONFIG_PREFIX) $(LLVM_BUILDDIR)/bin/llvm-config --ldflags --libs --system-libs $(LLVM_COMPONENTS)) -lstdc++ $(CGO_LDFLAGS_EXTRA)
 endif

-clean:
+clean: ## Remove build directory
 	@rm -rf build

 FMT_PATHS = ./*.go builder cgo/*.go compiler interp loader src transform
-fmt:
+fmt: ## Reformat source
 	@gofmt -l -w $(FMT_PATHS)
-fmt-check:
+fmt-check: ## Warn if any source needs reformatting
 	@unformatted=$$(gofmt -l $(FMT_PATHS)); [ -z "$$unformatted" ] && exit 0; echo "Unformatted:"; for fn in $$unformatted; do echo "  $$fn"; done; exit 1


-gen-device: gen-device-avr gen-device-esp gen-device-nrf gen-device-sam gen-device-sifive gen-device-kendryte gen-device-nxp gen-device-rp
+gen-device: gen-device-avr gen-device-esp gen-device-nrf gen-device-sam gen-device-sifive gen-device-kendryte gen-device-nxp gen-device-rp ## Generate microcontroller-specific sources
 ifneq ($(STM32), 0)
 gen-device: gen-device-stm32
 endif
@@ -237,18 +237,16 @@ gen-device-renesas: build/gen-device-svd
 	./build/gen-device-svd -source=https://github.com/tinygo-org/renesas-svd lib/renesas-svd/ src/device/renesas/
 	GO111MODULE=off $(GO) fmt ./src/device/renesas

-# Get LLVM sources.
 $(LLVM_PROJECTDIR)/llvm:
 	git clone -b tinygo_xtensa_release_18.1.2 --depth=1 https://github.com/tinygo-org/llvm-project $(LLVM_PROJECTDIR)
-llvm-source: $(LLVM_PROJECTDIR)/llvm
+llvm-source: $(LLVM_PROJECTDIR)/llvm ## Get LLVM sources

 # Configure LLVM.
 TINYGO_SOURCE_DIR=$(shell pwd)
 $(LLVM_BUILDDIR)/build.ninja:
-	mkdir -p $(LLVM_BUILDDIR) && cd $(LLVM_BUILDDIR) && cmake -G Ninja $(TINYGO_SOURCE_DIR)/$(LLVM_PROJECTDIR)/llvm "-DLLVM_TARGETS_TO_BUILD=X86;ARM;AArch64;RISCV;WebAssembly" "-DLLVM_EXPERIMENTAL_TARGETS_TO_BUILD=AVR;Xtensa" -DCMAKE_BUILD_TYPE=Release -DLIBCLANG_BUILD_STATIC=ON -DLLVM_ENABLE_TERMINFO=OFF -DLLVM_ENABLE_ZLIB=OFF -DLLVM_ENABLE_ZSTD=OFF -DLLVM_ENABLE_LIBEDIT=OFF -DLLVM_ENABLE_Z3_SOLVER=OFF -DLLVM_ENABLE_OCAMLDOC=OFF -DLLVM_ENABLE_LIBXML2=OFF -DLLVM_ENABLE_PROJECTS="clang;lld" -DLLVM_TOOL_CLANG_TOOLS_EXTRA_BUILD=OFF -DCLANG_ENABLE_STATIC_ANALYZER=OFF -DCLANG_ENABLE_ARCMT=OFF $(LLVM_OPTION)
+	mkdir -p $(LLVM_BUILDDIR) && cd $(LLVM_BUILDDIR) && cmake -G Ninja $(TINYGO_SOURCE_DIR)/$(LLVM_PROJECTDIR)/llvm "-DLLVM_TARGETS_TO_BUILD=X86;ARM;AArch64;AVR;Mips;RISCV;WebAssembly" "-DLLVM_EXPERIMENTAL_TARGETS_TO_BUILD=Xtensa" -DCMAKE_BUILD_TYPE=Release -DLIBCLANG_BUILD_STATIC=ON -DLLVM_ENABLE_TERMINFO=OFF -DLLVM_ENABLE_ZLIB=OFF -DLLVM_ENABLE_ZSTD=OFF -DLLVM_ENABLE_LIBEDIT=OFF -DLLVM_ENABLE_Z3_SOLVER=OFF -DLLVM_ENABLE_OCAMLDOC=OFF -DLLVM_ENABLE_LIBXML2=OFF -DLLVM_ENABLE_PROJECTS="clang;lld" -DLLVM_TOOL_CLANG_TOOLS_EXTRA_BUILD=OFF -DCLANG_ENABLE_STATIC_ANALYZER=OFF -DCLANG_ENABLE_ARCMT=OFF $(LLVM_OPTION)

-# Build LLVM.
-$(LLVM_BUILDDIR): $(LLVM_BUILDDIR)/build.ninja
+$(LLVM_BUILDDIR): $(LLVM_BUILDDIR)/build.ninja ## Build LLVM
 	cd $(LLVM_BUILDDIR) && ninja $(NINJA_BUILD_TARGETS)

 ifneq ($(USE_SYSTEM_BINARYEN),1)
@@ -257,7 +255,7 @@ ifneq ($(USE_SYSTEM_BINARYEN),1)
 binaryen: build/wasm-opt$(EXE)
 build/wasm-opt$(EXE):
 	mkdir -p build
-	cd lib/binaryen && cmake -G Ninja . -DBUILD_STATIC_LIB=ON -DBUILD_TESTS=OFF $(BINARYEN_OPTION) && ninja bin/wasm-opt$(EXE)
+	cd lib/binaryen && cmake -G Ninja . -DBUILD_STATIC_LIB=ON -DBUILD_TESTS=OFF -DENABLE_WERROR=OFF $(BINARYEN_OPTION) && ninja bin/wasm-opt$(EXE)
 	cp lib/binaryen/bin/wasm-opt$(EXE) build/wasm-opt$(EXE)
 endif

@@ -268,6 +266,18 @@ lib/wasi-libc/sysroot/lib/wasm32-wasi/libc.a:
 	@if [ ! -e lib/wasi-libc/Makefile ]; then echo "Submodules have not been downloaded. Please download them using:\n  git submodule update --init"; exit 1; fi
 	cd lib/wasi-libc && $(MAKE) -j4 EXTRA_CFLAGS="-O2 -g -DNDEBUG -mnontrapping-fptoint -msign-ext" MALLOC_IMPL=none CC="$(CLANG)" AR=$(LLVM_AR) NM=$(LLVM_NM)

+# Generate WASI syscall bindings
+WASM_TOOLS_MODULE=github.com/ydnar/wasm-tools-go
+.PHONY: wasi-syscall
+wasi-syscall: wasi-cm
+	go run -modfile ./internal/wasm-tools/go.mod $(WASM_TOOLS_MODULE)/cmd/wit-bindgen-go generate --versioned -o ./src/internal -p internal --cm internal/cm ./lib/wasi-cli/wit
+
+# Copy package cm into src/internal/cm
+.PHONY: wasi-cm
+wasi-cm:
+	# rm -rf ./src/internal/cm
+	rsync -rv --delete --exclude '*_test.go' $(shell go list -modfile ./internal/wasm-tools/go.mod -m -f {{.Dir}} $(WASM_TOOLS_MODULE))/cm ./src/internal/
+
 # Check for Node.js used during WASM tests.
 NODEJS_VERSION := $(word 1,$(subst ., ,$(shell node -v | cut -c 2-)))
 MIN_NODEJS_VERSION=18
@@ -279,8 +289,7 @@ ifeq (, $(shell which node))
 endif
 	@if [ $(NODEJS_VERSION) -lt $(MIN_NODEJS_VERSION) ]; then echo "Install NodeJS version 18+ to run tests."; exit 1; fi

-# Build the Go compiler.
-tinygo:
+tinygo: ## Build the TinyGo compiler
 	@if [ ! -f "$(LLVM_BUILDDIR)/bin/llvm-config" ]; then echo "Fetch and build LLVM first by running:"; echo "  $(MAKE) llvm-source"; echo "  $(MAKE) $(LLVM_BUILDDIR)"; exit 1; fi
 	CGO_CPPFLAGS="$(CGO_CPPFLAGS)" CGO_CXXFLAGS="$(CGO_CXXFLAGS)" CGO_LDFLAGS="$(CGO_LDFLAGS)" $(GOENVFLAGS) $(GO) build -buildmode exe -o build/tinygo$(EXE) -tags "byollvm osusergo" -ldflags="-X github.com/tinygo-org/tinygo/goenv.GitSha1=`git rev-parse --short HEAD`" .
 test: wasi-libc check-nodejs-version
@@ -430,15 +439,36 @@ tinygo-test-wasi:
 	$(TINYGO) test -target wasip1 $(TEST_PACKAGES_FAST) $(TEST_PACKAGES_SLOW) ./tests/runtime_wasi
 tinygo-test-wasip1:
 	GOOS=wasip1 GOARCH=wasm $(TINYGO) test $(TEST_PACKAGES_FAST) $(TEST_PACKAGES_SLOW) ./tests/runtime_wasi
-tinygo-test-wasi-fast:
-	$(TINYGO) test -target wasip1 $(TEST_PACKAGES_FAST) ./tests/runtime_wasi
 tinygo-test-wasip1-fast:
-	GOOS=wasip1 GOARCH=wasm $(TINYGO) test $(TEST_PACKAGES_FAST) ./tests/runtime_wasi
-tinygo-bench-wasi:
+	$(TINYGO) test -target=wasip1 $(TEST_PACKAGES_FAST) ./tests/runtime_wasi
+
+tinygo-test-wasip2-slow:
+	$(TINYGO) test -target=wasip2 $(TEST_PACKAGES_SLOW)
+tinygo-test-wasip2-fast:
+	$(TINYGO) test -target=wasip2 $(TEST_PACKAGES_FAST) ./tests/runtime_wasi
+
+tinygo-test-wasip2-sum-slow:
+	TINYGO=$(TINYGO) \
+	TARGET=wasip2 \
+	TESTOPTS="-x -work" \
+	PACKAGES="$(TEST_PACKAGES_SLOW)" \
+	gotestsum --raw-command -- ./tools/tgtestjson.sh
+tinygo-test-wasip2-sum-fast:
+	TINYGO=$(TINYGO) \
+	TARGET=wasip2 \
+	TESTOPTS="-x -work" \
+	PACKAGES="$(TEST_PACKAGES_FAST)" \
+	gotestsum --raw-command -- ./tools/tgtestjson.sh
+tinygo-bench-wasip1:
 	$(TINYGO) test -target wasip1 -bench . $(TEST_PACKAGES_FAST) $(TEST_PACKAGES_SLOW)
-tinygo-bench-wasi-fast:
+tinygo-bench-wasip1-fast:
 	$(TINYGO) test -target wasip1 -bench . $(TEST_PACKAGES_FAST)

+tinygo-bench-wasip2:
+	$(TINYGO) test -target wasip2 -bench . $(TEST_PACKAGES_FAST) $(TEST_PACKAGES_SLOW)
+tinygo-bench-wasip2-fast:
+	$(TINYGO) test -target wasip2 -bench . $(TEST_PACKAGES_FAST)
+
 # Test external packages in a large corpus.
 test-corpus:
 	CGO_CPPFLAGS="$(CGO_CPPFLAGS)" CGO_CXXFLAGS="$(CGO_CXXFLAGS)" CGO_LDFLAGS="$(CGO_LDFLAGS)" $(GO) test $(GOTESTFLAGS) -timeout=1h -buildmode exe -tags byollvm -run TestCorpus . -corpus=testdata/corpus.yaml
@@ -491,7 +521,7 @@ smoketest:
 	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=nano-rp2040         examples/rtcinterrupt
 	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=pca10040            examples/serial
+	$(TINYGO) build -size short -o test.hex -target=pca10040            examples/machinetest
 	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=pca10040            examples/systick
 	@$(MD5SUM) test.hex
@@ -523,7 +553,7 @@ ifneq ($(WASM), 0)
 	@$(MD5SUM) test.wasm
 	$(TINYGO) build -size short -o test.wasm -tags=circuitplay_bluefruit examples/blinky1
 	@$(MD5SUM) test.wasm
-	$(TINYGO) build -size short -o test.wasm -tags=mch2022              examples/serial
+	$(TINYGO) build -size short -o test.wasm -tags=mch2022              examples/machinetest
 	@$(MD5SUM) test.wasm
 	$(TINYGO) build -size short -o test.wasm -tags=gopher_badge         examples/blinky1
 	@$(MD5SUM) test.wasm
@@ -621,7 +651,7 @@ endif
 	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=itsybitsy-nrf52840  examples/blinky1
 	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=qtpy                examples/serial
+	$(TINYGO) build -size short -o test.hex -target=qtpy                examples/machinetest
 	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=teensy41            examples/blinky1
 	@$(MD5SUM) test.hex
@@ -693,7 +723,7 @@ endif
 	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=feather-nrf52840    examples/usb-midi
 	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=nrf52840-s140v6-uf2-generic	examples/serial
+	$(TINYGO) build -size short -o test.hex -target=nrf52840-s140v6-uf2-generic	examples/machinetest
 	@$(MD5SUM) test.hex
 ifneq ($(STM32), 0)
 	$(TINYGO) build -size short -o test.hex -target=bluepill            examples/blinky1
@@ -735,7 +765,7 @@ ifneq ($(STM32), 0)
 endif
 	$(TINYGO) build -size short -o test.hex -target=atmega328pb         examples/blinkm
 	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=atmega1284p         examples/serial
+	$(TINYGO) build -size short -o test.hex -target=atmega1284p         examples/machinetest
 	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=arduino             examples/blinky1
 	@$(MD5SUM) test.hex
@@ -762,22 +792,22 @@ ifneq ($(XTENSA), 0)
 	@$(MD5SUM) test.bin
 	$(TINYGO) build -size short -o test.bin -target=nodemcu             examples/blinky1
 	@$(MD5SUM) test.bin
-	$(TINYGO) build -size short -o test.bin -target m5stack-core2       examples/serial
+	$(TINYGO) build -size short -o test.bin -target m5stack-core2       examples/machinetest
 	@$(MD5SUM) test.bin
-	$(TINYGO) build -size short -o test.bin -target m5stack             examples/serial
+	$(TINYGO) build -size short -o test.bin -target m5stack             examples/machinetest
 	@$(MD5SUM) test.bin
-	$(TINYGO) build -size short -o test.bin -target m5stick-c           examples/serial
+	$(TINYGO) build -size short -o test.bin -target m5stick-c           examples/machinetest
 	@$(MD5SUM) test.bin
-	$(TINYGO) build -size short -o test.bin -target m5paper             examples/serial
+	$(TINYGO) build -size short -o test.bin -target m5paper             examples/machinetest
 	@$(MD5SUM) test.bin
-	$(TINYGO) build -size short -o test.bin -target mch2022             examples/serial
+	$(TINYGO) build -size short -o test.bin -target mch2022             examples/machinetest
 	@$(MD5SUM) test.bin
 endif
-	$(TINYGO) build -size short -o test.bin -target=qtpy-esp32c3        examples/serial
+	$(TINYGO) build -size short -o test.bin -target=qtpy-esp32c3        examples/machinetest
 	@$(MD5SUM) test.bin
-	$(TINYGO) build -size short -o test.bin -target=m5stamp-c3          examples/serial
+	$(TINYGO) build -size short -o test.bin -target=m5stamp-c3          examples/machinetest
 	@$(MD5SUM) test.bin
-	$(TINYGO) build -size short -o test.bin -target=xiao-esp32c3        examples/serial
+	$(TINYGO) build -size short -o test.bin -target=xiao-esp32c3        examples/machinetest
 	@$(MD5SUM) test.bin
 	$(TINYGO) build -size short -o test.hex -target=hifive1b            examples/blinky1
 	@$(MD5SUM) test.hex
@@ -802,6 +832,7 @@ endif
 	$(TINYGO) build -size short -o test.hex -target=pca10040 -opt=0     ./testdata/stdlib.go
 	@$(MD5SUM) test.hex
 	GOOS=linux GOARCH=arm $(TINYGO) build -size short -o test.elf       ./testdata/cgo
+	GOOS=linux GOARCH=mips    $(TINYGO) build -size short -o test.elf   ./testdata/cgo
 	GOOS=windows GOARCH=amd64 $(TINYGO) build -size short -o test.exe   ./testdata/cgo
 	GOOS=windows GOARCH=arm64 $(TINYGO) build -size short -o test.exe   ./testdata/cgo
 	GOOS=darwin GOARCH=amd64 $(TINYGO) build  -size short -o test       ./testdata/cgo
@@ -822,6 +853,7 @@ build/release: tinygo gen-device wasi-libc $(if $(filter 1,$(USE_SYSTEM_BINARYEN
 	@mkdir -p build/release/tinygo/lib/CMSIS/CMSIS
 	@mkdir -p build/release/tinygo/lib/macos-minimal-sdk
 	@mkdir -p build/release/tinygo/lib/mingw-w64/mingw-w64-crt/lib-common
+	@mkdir -p build/release/tinygo/lib/mingw-w64/mingw-w64-crt/stdio
 	@mkdir -p build/release/tinygo/lib/mingw-w64/mingw-w64-headers/defaults
 	@mkdir -p build/release/tinygo/lib/musl/arch
 	@mkdir -p build/release/tinygo/lib/musl/crt
@@ -832,9 +864,7 @@ build/release: tinygo gen-device wasi-libc $(if $(filter 1,$(USE_SYSTEM_BINARYEN
 	@mkdir -p build/release/tinygo/lib/wasi-libc/libc-bottom-half/headers
 	@mkdir -p build/release/tinygo/lib/wasi-libc/libc-top-half/musl/arch
 	@mkdir -p build/release/tinygo/lib/wasi-libc/libc-top-half/musl/src
-	@mkdir -p build/release/tinygo/pkg/thumbv6m-unknown-unknown-eabi-cortex-m0
-	@mkdir -p build/release/tinygo/pkg/thumbv6m-unknown-unknown-eabi-cortex-m0plus
-	@mkdir -p build/release/tinygo/pkg/thumbv7em-unknown-unknown-eabi-cortex-m4
+	@mkdir -p build/release/tinygo/lib/wasi-cli/
 	@echo copying source files
 	@cp -p  build/tinygo$(EXE)           build/release/tinygo/bin
 ifneq ($(USE_SYSTEM_BINARYEN),1)
@@ -848,6 +878,7 @@ endif
 	@cp -rp lib/musl/arch/arm            build/release/tinygo/lib/musl/arch
 	@cp -rp lib/musl/arch/generic        build/release/tinygo/lib/musl/arch
 	@cp -rp lib/musl/arch/i386           build/release/tinygo/lib/musl/arch
+	@cp -rp lib/musl/arch/mips           build/release/tinygo/lib/musl/arch
 	@cp -rp lib/musl/arch/x86_64         build/release/tinygo/lib/musl/arch
 	@cp -rp lib/musl/crt/crt1.c          build/release/tinygo/lib/musl/crt
 	@cp -rp lib/musl/COPYRIGHT           build/release/tinygo/lib/musl
@@ -858,10 +889,12 @@ endif
 	@cp -rp lib/musl/src/include         build/release/tinygo/lib/musl/src
 	@cp -rp lib/musl/src/internal        build/release/tinygo/lib/musl/src
 	@cp -rp lib/musl/src/legacy          build/release/tinygo/lib/musl/src
+	@cp -rp lib/musl/src/locale          build/release/tinygo/lib/musl/src
 	@cp -rp lib/musl/src/linux           build/release/tinygo/lib/musl/src
 	@cp -rp lib/musl/src/malloc          build/release/tinygo/lib/musl/src
 	@cp -rp lib/musl/src/mman            build/release/tinygo/lib/musl/src
 	@cp -rp lib/musl/src/math            build/release/tinygo/lib/musl/src
+	@cp -rp lib/musl/src/multibyte       build/release/tinygo/lib/musl/src
 	@cp -rp lib/musl/src/signal          build/release/tinygo/lib/musl/src
 	@cp -rp lib/musl/src/stdio           build/release/tinygo/lib/musl/src
 	@cp -rp lib/musl/src/string          build/release/tinygo/lib/musl/src
@@ -871,6 +904,7 @@ endif
 	@cp -rp lib/mingw-w64/mingw-w64-crt/def-include                 build/release/tinygo/lib/mingw-w64/mingw-w64-crt
 	@cp -rp lib/mingw-w64/mingw-w64-crt/lib-common/api-ms-win-crt-* build/release/tinygo/lib/mingw-w64/mingw-w64-crt/lib-common
 	@cp -rp lib/mingw-w64/mingw-w64-crt/lib-common/kernel32.def.in  build/release/tinygo/lib/mingw-w64/mingw-w64-crt/lib-common
+	@cp -rp lib/mingw-w64/mingw-w64-crt/stdio/ucrt_*                build/release/tinygo/lib/mingw-w64/mingw-w64-crt/stdio
 	@cp -rp lib/mingw-w64/mingw-w64-headers/crt/                    build/release/tinygo/lib/mingw-w64/mingw-w64-headers
 	@cp -rp lib/mingw-w64/mingw-w64-headers/defaults/include        build/release/tinygo/lib/mingw-w64/mingw-w64-headers/defaults
 	@cp -rp lib/nrfx/*                   build/release/tinygo/lib/nrfx
@@ -891,16 +925,11 @@ endif
 	@cp -rp lib/wasi-libc/libc-top-half/musl/src/string             build/release/tinygo/lib/wasi-libc/libc-top-half/musl/src
 	@cp -rp lib/wasi-libc/libc-top-half/musl/include                build/release/tinygo/lib/wasi-libc/libc-top-half/musl
 	@cp -rp lib/wasi-libc/sysroot                                   build/release/tinygo/lib/wasi-libc/sysroot
+	@cp -rp lib/wasi-cli/wit                                        build/release/tinygo/lib/wasi-cli/wit
 	@cp -rp llvm-project/compiler-rt/lib/builtins build/release/tinygo/lib/compiler-rt-builtins
 	@cp -rp llvm-project/compiler-rt/LICENSE.TXT  build/release/tinygo/lib/compiler-rt-builtins
 	@cp -rp src                          build/release/tinygo/src
 	@cp -rp targets                      build/release/tinygo/targets
-	./build/release/tinygo/bin/tinygo build-library -target=cortex-m0     -o build/release/tinygo/pkg/thumbv6m-unknown-unknown-eabi-cortex-m0/compiler-rt     compiler-rt
-	./build/release/tinygo/bin/tinygo build-library -target=cortex-m0plus -o build/release/tinygo/pkg/thumbv6m-unknown-unknown-eabi-cortex-m0plus/compiler-rt compiler-rt
-	./build/release/tinygo/bin/tinygo build-library -target=cortex-m4     -o build/release/tinygo/pkg/thumbv7em-unknown-unknown-eabi-cortex-m4/compiler-rt    compiler-rt
-	./build/release/tinygo/bin/tinygo build-library -target=cortex-m0     -o build/release/tinygo/pkg/thumbv6m-unknown-unknown-eabi-cortex-m0/picolibc     picolibc
-	./build/release/tinygo/bin/tinygo build-library -target=cortex-m0plus -o build/release/tinygo/pkg/thumbv6m-unknown-unknown-eabi-cortex-m0plus/picolibc picolibc
-	./build/release/tinygo/bin/tinygo build-library -target=cortex-m4     -o build/release/tinygo/pkg/thumbv7em-unknown-unknown-eabi-cortex-m4/picolibc    picolibc

 release:
 	tar -czf build/release.tar.gz -C build/release tinygo
@@ -918,14 +947,33 @@ release: build/release
 deb: build/release
 endif

-lint:
-	go run github.com/mgechev/revive -version
+.PHONY: tools
+tools:
+	cd internal/tools && go generate -tags tools ./
+
+.PHONY: lint
+lint: tools ## Lint source tree
+	revive -version
 	# TODO: lint more directories!
 	# revive.toml isn't flexible enough to filter out just one kind of error from a checker, so do it with grep here.
 	# Can't use grep with friendly formatter.  Plain output isn't too bad, though.
 	# Use 'grep .' to get rid of stray blank line
-	go run github.com/mgechev/revive -config revive.toml compiler/... src/{os,reflect}/*.go | grep -v "should have comment or be unexported" | grep '.' | awk '{print}; END {exit NR>0}'
+	revive -config revive.toml compiler/... src/{os,reflect}/*.go | grep -v "should have comment or be unexported" | grep '.' | awk '{print}; END {exit NR>0}'

-spell:
-	# Check for typos in comments.  Skip git submodules etc.
-	go run github.com/client9/misspell/cmd/misspell -i 'ackward,devided,extint,inbetween,programmmer,rela' $$( find . -depth 1 -type d  | egrep -w -v 'lib|llvm|src/net' )
+SPELLDIRSCMD=find . -depth 1 -type d  | egrep -wv '.git|lib|llvm|src'; find src -depth 1 | egrep -wv 'device|internal|net|vendor'; find src/internal -depth 1 -type d | egrep -wv src/internal/wasi
+.PHONY: spell
+spell: tools ## Spellcheck source tree
+	misspell -error --dict misspell.csv -i 'ackward,devided,extint,rela' $$( $(SPELLDIRSCMD) ) *.md
+
+.PHONY: spellfix
+spellfix: tools ## Same as spell, but fixes what it finds
+	misspell -w --dict misspell.csv -i 'ackward,devided,extint,rela' $$( $(SPELLDIRSCMD) ) *.md
+
+# https://www.client9.com/self-documenting-makefiles/
+.PHONY: help
+help:
+	@awk -F ':|##' '/^[^\t].+?:.*?##/ {\
+	gsub(/\$$\(LLVM_BUILDDIR\)/, "$(LLVM_BUILDDIR)"); \
+        printf "\033[36m%-30s\033[0m %s\n", $$1, $$NF \
+        }' $(MAKEFILE_LIST)
+#.DEFAULT_GOAL=help
@@ -16,7 +16,7 @@ import (
 	"github.com/blakesmith/ar"
 )

-// makeArchive creates an arcive for static linking from a list of object files
+// makeArchive creates an archive for static linking from a list of object files
 // given as a parameter. It is equivalent to the following command:
 //
 //	ar -rcs <archivePath> <objs...>
@@ -148,7 +148,7 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 		job := makeDarwinLibSystemJob(config, tmpdir)
 		libcDependencies = append(libcDependencies, job)
 	case "musl":
-		job, unlock, err := Musl.load(config, tmpdir)
+		job, unlock, err := libMusl.load(config, tmpdir)
 		if err != nil {
 			return BuildResult{}, err
 		}
@@ -156,7 +156,7 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 		libcDependencies = append(libcDependencies, dummyCompileJob(filepath.Join(filepath.Dir(job.result), "crt1.o")))
 		libcDependencies = append(libcDependencies, job)
 	case "picolibc":
-		libcJob, unlock, err := Picolibc.load(config, tmpdir)
+		libcJob, unlock, err := libPicolibc.load(config, tmpdir)
 		if err != nil {
 			return BuildResult{}, err
 		}
@@ -169,18 +169,19 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 		}
 		libcDependencies = append(libcDependencies, dummyCompileJob(path))
 	case "wasmbuiltins":
-		libcJob, unlock, err := WasmBuiltins.load(config, tmpdir)
+		libcJob, unlock, err := libWasmBuiltins.load(config, tmpdir)
 		if err != nil {
 			return BuildResult{}, err
 		}
 		defer unlock()
 		libcDependencies = append(libcDependencies, libcJob)
 	case "mingw-w64":
-		_, unlock, err := MinGW.load(config, tmpdir)
+		job, unlock, err := libMinGW.load(config, tmpdir)
 		if err != nil {
 			return BuildResult{}, err
 		}
-		unlock()
+		defer unlock()
+		libcDependencies = append(libcDependencies, job)
 		libcDependencies = append(libcDependencies, makeMinGWExtraLibs(tmpdir, config.GOARCH())...)
 	case "":
 		// no library specified, so nothing to do
@@ -353,10 +354,6 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 		}
 		packageActionIDJobs[pkg.ImportPath] = packageActionIDJob

-		// Build the SSA for the given package.
-		ssaPkg := program.Package(pkg.Pkg)
-		ssaPkg.Build()
-
 		// Now create the job to actually build the package. It will exit early
 		// if the package is already compiled.
 		job := &compileJob{
@@ -379,7 +376,7 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 				defer mod.Context().Dispose()
 				defer mod.Dispose()
 				if errs != nil {
-					return newMultiError(errs)
+					return newMultiError(errs, pkg.ImportPath)
 				}
 				if err := llvm.VerifyModule(mod, llvm.PrintMessageAction); err != nil {
 					return errors.New("verification error after compiling package " + pkg.ImportPath)
@@ -655,7 +652,7 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 	// Add compiler-rt dependency if needed. Usually this is a simple load from
 	// a cache.
 	if config.Target.RTLib == "compiler-rt" {
-		job, unlock, err := CompilerRT.load(config, tmpdir)
+		job, unlock, err := libCompilerRT.load(config, tmpdir)
 		if err != nil {
 			return result, err
 		}
@@ -749,6 +746,8 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 				ldflags = append(ldflags, dependency.result)
 			}
 			ldflags = append(ldflags, "-mllvm", "-mcpu="+config.CPU())
+			ldflags = append(ldflags, "-mllvm", "-mattr="+config.Features()) // needed for MIPS softfloat
+			ldflags = append(ldflags, "-mllvm", "-wasm-enable-eh")
 			if config.GOOS() == "windows" {
 				// Options for the MinGW wrapper for the lld COFF linker.
 				ldflags = append(ldflags,
@@ -782,7 +781,7 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 			}
 			err = link(config.Target.Linker, ldflags...)
 			if err != nil {
-				return &commandError{"failed to link", result.Executable, err}
+				return err
 			}

 			var calculatedStacks []string
@@ -840,11 +839,11 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 					"--output", result.Executable,
 				)

+				wasmopt := goenv.Get("WASMOPT")
 				if config.Options.PrintCommands != nil {
-					config.Options.PrintCommands(goenv.Get("WASMOPT"), args...)
+					config.Options.PrintCommands(wasmopt, args...)
 				}
-
-				cmd := exec.Command(goenv.Get("WASMOPT"), args...)
+				cmd := exec.Command(wasmopt, args...)
 				cmd.Stdout = os.Stdout
 				cmd.Stderr = os.Stderr

@@ -854,6 +853,62 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 				}
 			}

+			// Run wasm-tools for component-model binaries
+			witPackage := strings.ReplaceAll(config.Target.WITPackage, "{root}", goenv.Get("TINYGOROOT"))
+			if config.Options.WITPackage != "" {
+				witPackage = config.Options.WITPackage
+			}
+			witWorld := config.Target.WITWorld
+			if config.Options.WITWorld != "" {
+				witWorld = config.Options.WITWorld
+			}
+			if witPackage != "" && witWorld != "" {
+
+				// wasm-tools component embed -w wasi:cli/command
+				// 		$$(tinygo env TINYGOROOT)/lib/wasi-cli/wit/ main.wasm -o embedded.wasm
+				args := []string{
+					"component",
+					"embed",
+					"-w", witWorld,
+					witPackage,
+					result.Executable,
+					"-o", result.Executable,
+				}
+
+				wasmtools := goenv.Get("WASMTOOLS")
+				if config.Options.PrintCommands != nil {
+					config.Options.PrintCommands(wasmtools, args...)
+				}
+				cmd := exec.Command(wasmtools, args...)
+				cmd.Stdout = os.Stdout
+				cmd.Stderr = os.Stderr
+
+				err := cmd.Run()
+				if err != nil {
+					return fmt.Errorf("wasm-tools failed: %w", err)
+				}
+
+				// wasm-tools component new embedded.wasm -o component.wasm
+				args = []string{
+					"component",
+					"new",
+					result.Executable,
+					"-o", result.Executable,
+				}
+
+				if config.Options.PrintCommands != nil {
+					config.Options.PrintCommands(wasmtools, args...)
+				}
+				cmd = exec.Command(wasmtools, args...)
+				cmd.Stdout = os.Stdout
+				cmd.Stderr = os.Stderr
+
+				err = cmd.Run()
+				if err != nil {
+					return fmt.Errorf("wasm-tools failed: %w", err)
+				}
+			}
+
 			// Print code size if requested.
 			if config.Options.PrintSizes == "short" || config.Options.PrintSizes == "full" {
 				packagePathMap := make(map[string]string, len(lprogram.Packages))
@@ -1078,7 +1133,7 @@ func optimizeProgram(mod llvm.Module, config *compileopts.Config, globalValues m
 	// O0/O1/O2/Os/Oz optimization pipeline).
 	errs := transform.Optimize(mod, config)
 	if len(errs) > 0 {
-		return newMultiError(errs)
+		return newMultiError(errs, "")
 	}
 	if err := llvm.VerifyModule(mod, llvm.PrintMessageAction); err != nil {
 		return errors.New("verification failure after LLVM optimization passes")
@@ -34,6 +34,7 @@ func TestClangAttributes(t *testing.T) {
 		"nintendoswitch",
 		"riscv-qemu",
 		"wasip1",
+		"wasip2",
 		"wasm",
 		"wasm-unknown",
 	}
@@ -56,6 +57,10 @@ func TestClangAttributes(t *testing.T) {
 		{GOOS: "linux", GOARCH: "arm", GOARM: "6"},
 		{GOOS: "linux", GOARCH: "arm", GOARM: "7"},
 		{GOOS: "linux", GOARCH: "arm64"},
+		{GOOS: "linux", GOARCH: "mips", GOMIPS: "hardfloat"},
+		{GOOS: "linux", GOARCH: "mipsle", GOMIPS: "hardfloat"},
+		{GOOS: "linux", GOARCH: "mips", GOMIPS: "softfloat"},
+		{GOOS: "linux", GOARCH: "mipsle", GOMIPS: "softfloat"},
 		{GOOS: "darwin", GOARCH: "amd64"},
 		{GOOS: "darwin", GOARCH: "arm64"},
 		{GOOS: "windows", GOARCH: "amd64"},
@@ -66,6 +71,9 @@ func TestClangAttributes(t *testing.T) {
 		if options.GOARCH == "arm" {
 			name += ",GOARM=" + options.GOARM
 		}
+		if options.GOARCH == "mips" || options.GOARCH == "mipsle" {
+			name += ",GOMIPS=" + options.GOMIPS
+		}
 		t.Run(name, func(t *testing.T) {
 			testClangAttributes(t, options)
 		})
@@ -3,8 +3,8 @@ package builder
 import (
 	"os"
 	"path/filepath"
-	"strings"

+	"github.com/tinygo-org/tinygo/compileopts"
 	"github.com/tinygo-org/tinygo/goenv"
 )

@@ -132,6 +132,38 @@ var genericBuiltins = []string{
 	"umodti3.c",
 }

+// These are the GENERIC_TF_SOURCES as of LLVM 18.
+// They are not needed on all platforms (32-bit platforms usually don't need
+// these) but they seem to compile fine so it's easier to include them.
+var genericBuiltins128 = []string{
+	"addtf3.c",
+	"comparetf2.c",
+	"divtc3.c",
+	"divtf3.c",
+	"extenddftf2.c",
+	"extendhftf2.c",
+	"extendsftf2.c",
+	"fixtfdi.c",
+	"fixtfsi.c",
+	"fixtfti.c",
+	"fixunstfdi.c",
+	"fixunstfsi.c",
+	"fixunstfti.c",
+	"floatditf.c",
+	"floatsitf.c",
+	"floattitf.c",
+	"floatunditf.c",
+	"floatunsitf.c",
+	"floatuntitf.c",
+	"multc3.c",
+	"multf3.c",
+	"powitf2.c",
+	"subtf3.c",
+	"trunctfdf2.c",
+	"trunctfhf2.c",
+	"trunctfsf2.c",
+}
+
 var aeabiBuiltins = []string{
 	"arm/aeabi_cdcmp.S",
 	"arm/aeabi_cdcmpeq_check_nan.c",
@@ -169,12 +201,12 @@ var avrBuiltins = []string{
 	"avr/udivmodqi4.S",
 }

-// CompilerRT is a library with symbols required by programs compiled with LLVM.
-// These symbols are for operations that cannot be emitted with a single
+// libCompilerRT is a library with symbols required by programs compiled with
+// LLVM. These symbols are for operations that cannot be emitted with a single
 // instruction or a short sequence of instructions for that target.
 //
 // For more information, see: https://compiler-rt.llvm.org/
-var CompilerRT = Library{
+var libCompilerRT = Library{
 	name: "compiler-rt",
 	cflags: func(target, headerPath string) []string {
 		return []string{"-Werror", "-Wall", "-std=c11", "-nostdlibinc"}
@@ -190,11 +222,13 @@ var CompilerRT = Library{
 	},
 	librarySources: func(target string) ([]string, error) {
 		builtins := append([]string{}, genericBuiltins...) // copy genericBuiltins
-		if strings.HasPrefix(target, "arm") || strings.HasPrefix(target, "thumb") {
+		switch compileopts.CanonicalArchName(target) {
+		case "arm":
 			builtins = append(builtins, aeabiBuiltins...)
-		}
-		if strings.HasPrefix(target, "avr") {
+		case "avr":
 			builtins = append(builtins, avrBuiltins...)
+		case "x86_64", "aarch64", "riscv64": // any 64-bit arch
+			builtins = append(builtins, genericBuiltins128...)
 		}
 		return builtins, nil
 	},
@@ -93,7 +93,7 @@ struct AssemblerInvocation {
  EmitDwarfUnwindType EmitDwarfUnwind;

  // Whether to emit compact-unwind for non-canonical entries.
-  // Note: maybe overriden by other constraints.
+  // Note: maybe overridden by other constraints.
  unsigned EmitCompactUnwindNonCanonical : 1;

  /// The name of the relocation model to use.
@@ -27,10 +27,10 @@ func NewConfig(options *compileopts.Options) (*compileopts.Config, error) {
 	if err != nil {
 		return nil, err
 	}
-	if major != 1 || minor < 18 || minor > 22 {
+	if major != 1 || minor < 19 || minor > 22 {
 		// Note: when this gets updated, also update the Go compatibility matrix:
 		// https://github.com/tinygo-org/tinygo-site/blob/dev/content/docs/reference/go-compat-matrix.md
-		return nil, fmt.Errorf("requires go version 1.18 through 1.22, got go%d.%d", major, minor)
+		return nil, fmt.Errorf("requires go version 1.19 through 1.22, got go%d.%d", major, minor)
 	}

 	return &compileopts.Config{
@@ -3,7 +3,8 @@ package builder
 // MultiError is a list of multiple errors (actually: diagnostics) returned
 // during LLVM IR generation.
 type MultiError struct {
-	Errs []error
+	ImportPath string
+	Errs       []error
 }

 func (e *MultiError) Error() string {
@@ -14,15 +15,16 @@ func (e *MultiError) Error() string {

 // newMultiError returns a *MultiError if there is more than one error, or
 // returns that error directly when there is only one. Passing an empty slice
-// will lead to a panic.
-func newMultiError(errs []error) error {
+// will return nil (because there is no error).
+// The importPath may be passed if this error is for a single package.
+func newMultiError(errs []error, importPath string) error {
 	switch len(errs) {
 	case 0:
-		panic("attempted to create empty MultiError")
+		return nil
 	case 1:
 		return errs[0]
 	default:
-		return &MultiError{errs}
+		return &MultiError{importPath, errs}
 	}
 }

@@ -35,19 +35,6 @@ type Library struct {
 	crt1Source string
 }

-// Load the library archive, possibly generating and caching it if needed.
-// The resulting directory may be stored in the provided tmpdir, which is
-// expected to be removed after the Load call.
-func (l *Library) Load(config *compileopts.Config, tmpdir string) (dir string, err error) {
-	job, unlock, err := l.load(config, tmpdir)
-	if err != nil {
-		return "", err
-	}
-	defer unlock()
-	err = runJobs(job, config.Options.Semaphore)
-	return filepath.Dir(job.result), err
-}
-
 // load returns a compile job to build this library file for the given target
 // and CPU. It may return a dummy compileJob if the library build is already
 // cached. The path is stored as job.result but is only valid after the job has
@@ -162,25 +149,30 @@ func (l *Library) load(config *compileopts.Config, tmpdir string) (job *compileJ
 	if config.ABI() != "" {
 		args = append(args, "-mabi="+config.ABI())
 	}
-	if strings.HasPrefix(target, "arm") || strings.HasPrefix(target, "thumb") {
+	switch compileopts.CanonicalArchName(target) {
+	case "arm":
 		if strings.Split(target, "-")[2] == "linux" {
 			args = append(args, "-fno-unwind-tables", "-fno-asynchronous-unwind-tables")
 		} else {
 			args = append(args, "-fshort-enums", "-fomit-frame-pointer", "-mfloat-abi=soft", "-fno-unwind-tables", "-fno-asynchronous-unwind-tables")
 		}
-	}
-	if strings.HasPrefix(target, "avr") {
+	case "avr":
 		// AVR defaults to C float and double both being 32-bit. This deviates
 		// from what most code (and certainly compiler-rt) expects. So we need
 		// to force the compiler to use 64-bit floating point numbers for
 		// double.
 		args = append(args, "-mdouble=64")
-	}
-	if strings.HasPrefix(target, "riscv32-") {
+	case "riscv32":
 		args = append(args, "-march=rv32imac", "-fforce-enable-int128")
-	}
-	if strings.HasPrefix(target, "riscv64-") {
+	case "riscv64":
 		args = append(args, "-march=rv64gc")
+	case "mips":
+		args = append(args, "-fno-pic")
+	}
+	if config.Target.SoftFloat {
+		// Use softfloat instead of floating point instructions. This is
+		// supported on many architectures.
+		args = append(args, "-msoft-float")
 	}

 	var once sync.Once
@@ -10,7 +10,7 @@ import (
 	"github.com/tinygo-org/tinygo/goenv"
 )

-var MinGW = Library{
+var libMinGW = Library{
 	name: "mingw-w64",
 	makeHeaders: func(target, includeDir string) error {
 		// copy _mingw.h
@@ -27,14 +27,30 @@ var MinGW = Library{
 		_, err = io.Copy(outf, inf)
 		return err
 	},
-	sourceDir: func() string { return "" }, // unused
+	sourceDir: func() string { return filepath.Join(goenv.Get("TINYGOROOT"), "lib/mingw-w64") },
 	cflags: func(target, headerPath string) []string {
-		// No flags necessary because there are no files to compile.
-		return nil
+		mingwDir := filepath.Join(goenv.Get("TINYGOROOT"), "lib/mingw-w64")
+		return []string{
+			"-nostdlibinc",
+			"-isystem", mingwDir + "/mingw-w64-headers/crt",
+			"-I", mingwDir + "/mingw-w64-headers/defaults/include",
+			"-I" + headerPath,
+		}
 	},
 	librarySources: func(target string) ([]string, error) {
-		// We only use the UCRT DLL file. No source files necessary.
-		return nil, nil
+		// These files are needed so that printf and the like are supported.
+		sources := []string{
+			"mingw-w64-crt/stdio/ucrt_fprintf.c",
+			"mingw-w64-crt/stdio/ucrt_fwprintf.c",
+			"mingw-w64-crt/stdio/ucrt_printf.c",
+			"mingw-w64-crt/stdio/ucrt_snprintf.c",
+			"mingw-w64-crt/stdio/ucrt_sprintf.c",
+			"mingw-w64-crt/stdio/ucrt_vfprintf.c",
+			"mingw-w64-crt/stdio/ucrt_vprintf.c",
+			"mingw-w64-crt/stdio/ucrt_vsnprintf.c",
+			"mingw-w64-crt/stdio/ucrt_vsprintf.c",
+		}
+		return sources, nil
 	},
 }

@@ -12,7 +12,7 @@ import (
 	"github.com/tinygo-org/tinygo/goenv"
 )

-var Musl = Library{
+var libMusl = Library{
 	name: "musl",
 	makeHeaders: func(target, includeDir string) error {
 		bits := filepath.Join(includeDir, "bits")
@@ -92,6 +92,8 @@ var Musl = Library{
 			"-Wno-ignored-pragmas",
 			"-Wno-tautological-constant-out-of-range-compare",
 			"-Wno-deprecated-non-prototype",
+			"-Wno-format",
+			"-Wno-parentheses",
 			"-Qunused-arguments",
 			// Select include dirs. Don't include standard library includes
 			// (that would introduce host dependencies and other complications),
@@ -119,11 +121,13 @@ var Musl = Library{
 			"internal/syscall_ret.c",
 			"internal/vdso.c",
 			"legacy/*.c",
+			"locale/*.c",
 			"linux/*.c",
 			"malloc/*.c",
 			"malloc/mallocng/*.c",
 			"mman/*.c",
 			"math/*.c",
+			"multibyte/*.c",
 			"signal/*.c",
 			"stdio/*.c",
 			"string/*.c",
@@ -8,9 +8,9 @@ import (
 	"github.com/tinygo-org/tinygo/goenv"
 )

-// Picolibc is a C library for bare metal embedded devices. It was originally
+// libPicolibc is a C library for bare metal embedded devices. It was originally
 // based on newlib.
-var Picolibc = Library{
+var libPicolibc = Library{
 	name: "picolibc",
 	makeHeaders: func(target, includeDir string) error {
 		f, err := os.Create(filepath.Join(includeDir, "picolibc.h"))
@@ -29,6 +29,7 @@ var Picolibc = Library{
 			"-D_HAVE_ALIAS_ATTRIBUTE",
 			"-DTINY_STDIO",
 			"-DPOSIX_IO",
+			"-DFORMAT_DEFAULT_INTEGER", // use __i_vfprintf and __i_vfscanf by default
 			"-D_IEEE_LIBM",
 			"-D__OBSOLETE_MATH_FLOAT=1", // use old math code that doesn't expect a FPU
 			"-D__OBSOLETE_MATH_DOUBLE=0",
@@ -1,10 +1,15 @@
 package builder

 import (
+	"bytes"
+	"fmt"
+	"go/scanner"
+	"go/token"
 	"os"
 	"os/exec"
-
-	"github.com/tinygo-org/tinygo/goenv"
+	"regexp"
+	"strconv"
+	"strings"
 )

 // runCCompiler invokes a C compiler with the given arguments.
@@ -23,22 +28,135 @@ func runCCompiler(flags ...string) error {

 // link invokes a linker with the given name and flags.
 func link(linker string, flags ...string) error {
-	if hasBuiltinTools && (linker == "ld.lld" || linker == "wasm-ld") {
-		// Run command with internal linker.
-		cmd := exec.Command(os.Args[0], append([]string{linker}, flags...)...)
-		cmd.Stdout = os.Stdout
-		cmd.Stderr = os.Stderr
-		return cmd.Run()
+	// We only support LLD.
+	if linker != "ld.lld" && linker != "wasm-ld" {
+		return fmt.Errorf("unexpected: linker %s should be ld.lld or wasm-ld", linker)
 	}

-	// Fall back to external command.
-	if _, ok := commands[linker]; ok {
-		return execCommand(linker, flags...)
+	var cmd *exec.Cmd
+	if hasBuiltinTools {
+		cmd = exec.Command(os.Args[0], append([]string{linker}, flags...)...)
+	} else {
+		name, err := LookupCommand(linker)
+		if err != nil {
+			return err
+		}
+		cmd = exec.Command(name, flags...)
 	}
-
-	cmd := exec.Command(linker, flags...)
+	var buf bytes.Buffer
 	cmd.Stdout = os.Stdout
-	cmd.Stderr = os.Stderr
-	cmd.Dir = goenv.Get("TINYGOROOT")
-	return cmd.Run()
+	cmd.Stderr = &buf
+	err := cmd.Run()
+	if err != nil {
+		if buf.Len() == 0 {
+			// The linker failed but there was no output.
+			// Therefore, show some output anyway.
+			return fmt.Errorf("failed to run linker: %w", err)
+		}
+		return parseLLDErrors(buf.String())
+	}
+	return nil
+}
+
+// Split LLD errors into individual erros (including errors that continue on the
+// next line, using a ">>>" prefix). If possible, replace the raw errors with a
+// more user-friendly version (and one that's more in a Go style).
+func parseLLDErrors(text string) error {
+	// Split linker output in separate error messages.
+	lines := strings.Split(text, "\n")
+	var errorLines []string // one or more line (belonging to a single error) per line
+	for _, line := range lines {
+		line = strings.TrimRight(line, "\r") // needed for Windows
+		if len(errorLines) != 0 && strings.HasPrefix(line, ">>> ") {
+			errorLines[len(errorLines)-1] += "\n" + line
+			continue
+		}
+		if line == "" {
+			continue
+		}
+		errorLines = append(errorLines, line)
+	}
+
+	// Parse error messages.
+	var linkErrors []error
+	var flashOverflow, ramOverflow uint64
+	for _, message := range errorLines {
+		parsedError := false
+
+		// Check for undefined symbols.
+		// This can happen in some cases like with CGo and //go:linkname tricker.
+		if matches := regexp.MustCompile(`^ld.lld: error: undefined symbol: (.*)\n`).FindStringSubmatch(message); matches != nil {
+			symbolName := matches[1]
+			for _, line := range strings.Split(message, "\n") {
+				matches := regexp.MustCompile(`referenced by .* \(((.*):([0-9]+))\)`).FindStringSubmatch(line)
+				if matches != nil {
+					parsedError = true
+					line, _ := strconv.Atoi(matches[3])
+					// TODO: detect common mistakes like -gc=none?
+					linkErrors = append(linkErrors, scanner.Error{
+						Pos: token.Position{
+							Filename: matches[2],
+							Line:     line,
+						},
+						Msg: "linker could not find symbol " + symbolName,
+					})
+				}
+			}
+		}
+
+		// Check for flash/RAM overflow.
+		if matches := regexp.MustCompile(`^ld.lld: error: section '(.*?)' will not fit in region '(.*?)': overflowed by ([0-9]+) bytes$`).FindStringSubmatch(message); matches != nil {
+			region := matches[2]
+			n, err := strconv.ParseUint(matches[3], 10, 64)
+			if err != nil {
+				// Should not happen at all (unless it overflows an uint64 for some reason).
+				continue
+			}
+
+			// Check which area overflowed.
+			// Some chips use differently named memory areas, but these are by
+			// far the most common.
+			switch region {
+			case "FLASH_TEXT":
+				if n > flashOverflow {
+					flashOverflow = n
+				}
+				parsedError = true
+			case "RAM":
+				if n > ramOverflow {
+					ramOverflow = n
+				}
+				parsedError = true
+			}
+		}
+
+		// If we couldn't parse the linker error: show the error as-is to
+		// the user.
+		if !parsedError {
+			linkErrors = append(linkErrors, LinkerError{message})
+		}
+	}
+
+	if flashOverflow > 0 {
+		linkErrors = append(linkErrors, LinkerError{
+			Msg: fmt.Sprintf("program too large for this chip (flash overflowed by %d bytes)\n\toptimization guide: https://tinygo.org/docs/guides/optimizing-binaries/", flashOverflow),
+		})
+	}
+	if ramOverflow > 0 {
+		linkErrors = append(linkErrors, LinkerError{
+			Msg: fmt.Sprintf("program uses too much static RAM on this chip (RAM overflowed by %d bytes)", ramOverflow),
+		})
+	}
+
+	return newMultiError(linkErrors, "")
+}
+
+// LLD linker error that could not be parsed or doesn't refer to a source
+// location.
+type LinkerError struct {
+	Msg string
+}
+
+func (e LinkerError) Error() string {
+	return e.Msg
 }
@@ -7,7 +7,7 @@ import (
 	"github.com/tinygo-org/tinygo/goenv"
 )

-var WasmBuiltins = Library{
+var libWasmBuiltins = Library{
 	name: "wasmbuiltins",
 	makeHeaders: func(target, includeDir string) error {
 		if err := os.Mkdir(includeDir+"/bits", 0o777); err != nil {
@@ -7,6 +7,7 @@ import (
 	"go/ast"
 	"go/format"
 	"go/parser"
+	"go/scanner"
 	"go/token"
 	"go/types"
 	"os"
@@ -219,7 +220,13 @@ func (i simpleImporter) Import(path string) (*types.Package, error) {
 // formatDiagnostic formats the error message to be an indented comment. It
 // also fixes Windows path name issues (backward slashes).
 func formatDiagnostic(err error) string {
-	msg := err.Error()
+	var msg string
+	switch err := err.(type) {
+	case scanner.Error:
+		msg = err.Pos.String() + ": " + err.Msg
+	default:
+		msg = err.Error()
+	}
 	if runtime.GOOS == "windows" {
 		// Fix Windows path slashes.
 		msg = strings.ReplaceAll(msg, "testdata\\", "testdata/")
@@ -17,6 +17,8 @@ var (
 		token.OR:  precedenceOr,
 		token.XOR: precedenceXor,
 		token.AND: precedenceAnd,
+		token.SHL: precedenceShift,
+		token.SHR: precedenceShift,
 		token.ADD: precedenceAdd,
 		token.SUB: precedenceAdd,
 		token.MUL: precedenceMul,
@@ -25,11 +27,13 @@ var (
 	}
 )

+// See: https://en.cppreference.com/w/c/language/operator_precedence
 const (
 	precedenceLowest = iota + 1
 	precedenceOr
 	precedenceXor
 	precedenceAnd
+	precedenceShift
 	precedenceAdd
 	precedenceMul
 	precedencePrefix
@@ -82,7 +86,7 @@ func parseConstExpr(t *tokenizer, precedence int) (ast.Expr, *scanner.Error) {

 	for t.peekToken != token.EOF && precedence < precedences[t.peekToken] {
 		switch t.peekToken {
-		case token.OR, token.XOR, token.AND, token.ADD, token.SUB, token.MUL, token.QUO, token.REM:
+		case token.OR, token.XOR, token.AND, token.SHL, token.SHR, token.ADD, token.SUB, token.MUL, token.QUO, token.REM:
 			t.Next()
 			leftExpr, err = parseBinaryExpr(t, leftExpr)
 		}
@@ -191,7 +195,9 @@ func (t *tokenizer) Next() {
 	t.curValue = t.peekValue

 	// Parse the next peek token.
-	t.peekPos += token.Pos(len(t.curValue))
+	if t.peekPos != token.NoPos {
+		t.peekPos += token.Pos(len(t.curValue))
+	}
 	for {
 		if len(t.buf) == 0 {
 			t.peekToken = token.EOF
@@ -203,15 +209,23 @@ func (t *tokenizer) Next() {
 			// Skip whitespace.
 			// Based on this source, not sure whether it represents C whitespace:
 			// https://en.cppreference.com/w/cpp/string/byte/isspace
-			t.peekPos++
+			if t.peekPos != token.NoPos {
+				t.peekPos++
+			}
 			t.buf = t.buf[1:]
-		case len(t.buf) >= 2 && (string(t.buf[:2]) == "||" || string(t.buf[:2]) == "&&"):
+		case len(t.buf) >= 2 && (string(t.buf[:2]) == "||" || string(t.buf[:2]) == "&&" || string(t.buf[:2]) == "<<" || string(t.buf[:2]) == ">>"):
 			// Two-character tokens.
 			switch c {
 			case '&':
 				t.peekToken = token.LAND
 			case '|':
 				t.peekToken = token.LOR
+			case '<':
+				t.peekToken = token.SHL
+			case '>':
+				t.peekToken = token.SHR
+			default:
+				panic("unreachable")
 			}
 			t.peekValue = t.buf[:2]
 			t.buf = t.buf[2:]
@@ -40,6 +40,10 @@ func TestParseConst(t *testing.T) {
 		{`5&5`, `5 & 5`},
 		{`5|5`, `5 | 5`},
 		{`5^5`, `5 ^ 5`},
+		{`5<<5`, `5 << 5`},
+		{`5>>5`, `5 >> 5`},
+		{`5>>5 + 3`, `5 >> (5 + 3)`},
+		{`5>>5 ^ 3`, `5>>5 ^ 3`},
 		{`5||5`, `error: 1:2: unexpected token ||, expected end of expression`}, // logical binops aren't supported yet
 		{`(5/5)`, `(5 / 5)`},
 		{`1 - 2`, `1 - 2`},
@@ -4,6 +4,7 @@ package cgo
 // modification. It does not touch the AST itself.

 import (
+	"bytes"
 	"crypto/sha256"
 	"crypto/sha512"
 	"encoding/hex"
@@ -369,42 +370,45 @@ func (f *cgoFile) createASTNode(name string, c clangCursor) (ast.Node, any) {
 		gen.Specs = append(gen.Specs, valueSpec)
 		return gen, nil
 	case C.CXCursor_MacroDefinition:
+		// Extract tokens from the Clang tokenizer.
+		// See: https://stackoverflow.com/a/19074846/559350
 		sourceRange := C.tinygo_clang_getCursorExtent(c)
-		start := C.clang_getRangeStart(sourceRange)
-		end := C.clang_getRangeEnd(sourceRange)
-		var file, endFile C.CXFile
-		var startOffset, endOffset C.unsigned
-		C.clang_getExpansionLocation(start, &file, nil, nil, &startOffset)
-		if file == nil {
-			f.addError(pos, "internal error: could not find file where macro is defined")
-			return nil, nil
-		}
-		C.clang_getExpansionLocation(end, &endFile, nil, nil, &endOffset)
-		if file != endFile {
-			f.addError(pos, "internal error: expected start and end location of a macro to be in the same file")
-			return nil, nil
-		}
-		if startOffset > endOffset {
-			f.addError(pos, "internal error: start offset of macro is after end offset")
-			return nil, nil
-		}
-
-		// read file contents and extract the relevant byte range
 		tu := C.tinygo_clang_Cursor_getTranslationUnit(c)
-		var size C.size_t
-		sourcePtr := C.clang_getFileContents(tu, file, &size)
-		if endOffset >= C.uint(size) {
-			f.addError(pos, "internal error: end offset of macro lies after end of file")
-			return nil, nil
+		var rawTokens *C.CXToken
+		var numTokens C.unsigned
+		C.clang_tokenize(tu, sourceRange, &rawTokens, &numTokens)
+		tokens := unsafe.Slice(rawTokens, numTokens)
+		// Convert this range of tokens back to source text.
+		// Ugly, but it works well enough.
+		sourceBuf := &bytes.Buffer{}
+		var startOffset int
+		for i, token := range tokens {
+			spelling := getString(C.clang_getTokenSpelling(tu, token))
+			location := C.clang_getTokenLocation(tu, token)
+			var tokenOffset C.unsigned
+			C.clang_getExpansionLocation(location, nil, nil, nil, &tokenOffset)
+			if i == 0 {
+				// The first token is the macro name itself.
+				// Skip it (after using its location).
+				startOffset = int(tokenOffset) + len(name)
+			} else {
+				// Later tokens are the macro contents.
+				for int(tokenOffset) > (startOffset + sourceBuf.Len()) {
+					// Pad the source text with whitespace (that must have been
+					// present in the original source as well).
+					sourceBuf.WriteByte(' ')
+				}
+				sourceBuf.WriteString(spelling)
+			}
 		}
-		source := string(((*[1 << 28]byte)(unsafe.Pointer(sourcePtr)))[startOffset:endOffset:endOffset])
-		if !strings.HasPrefix(source, name) {
-			f.addError(pos, fmt.Sprintf("internal error: expected macro value to start with %#v, got %#v", name, source))
-			return nil, nil
-		}
-		value := source[len(name):]
+		C.clang_disposeTokens(tu, rawTokens, numTokens)
+		value := sourceBuf.String()
 		// Try to convert this #define into a Go constant expression.
-		expr, scannerError := parseConst(pos+token.Pos(len(name)), f.fset, value)
+		tokenPos := token.NoPos
+		if pos != token.NoPos {
+			tokenPos = pos + token.Pos(len(name))
+		}
+		expr, scannerError := parseConst(tokenPos, f.fset, value)
 		if scannerError != nil {
 			f.errors = append(f.errors, *scannerError)
 			return nil, nil
@@ -642,13 +646,6 @@ func (p *cgoPackage) addErrorAfter(pos token.Pos, after, msg string) {

 // addErrorAt is a utility function to add an error to the list of errors.
 func (p *cgoPackage) addErrorAt(position token.Position, msg string) {
-	if filepath.IsAbs(position.Filename) {
-		// Relative paths for readability, like other Go parser errors.
-		relpath, err := filepath.Rel(p.currentDir, position.Filename)
-		if err == nil {
-			position.Filename = relpath
-		}
-	}
 	p.errors = append(p.errors, scanner.Error{
 		Pos: position,
 		Msg: msg,
@@ -13,10 +13,14 @@ typedef someType noType; // undefined type
 #define SOME_CONST_1 5) // invalid const syntax
 #define SOME_CONST_2 6) // const not used (so no error)
 #define SOME_CONST_3 1234 // const too large for byte
+#define   SOME_CONST_b      3   ) // const with lots of weird whitespace (to test error locations)
+#  define SOME_CONST_startspace 3)
 */
 //
 //
 // #define SOME_CONST_4 8) // after some empty lines
+// #cgo CFLAGS: -DSOME_PARAM_CONST_invalid=3/+3
+// #cgo CFLAGS: -DSOME_PARAM_CONST_valid=3+4
 import "C"

 // #warning another warning
@@ -24,6 +28,7 @@ import "C"

 // Make sure that errors for the following lines won't change with future
 // additions to the CGo preamble.
+//
 //line errors.go:100
 var (
 	// constant too large
@@ -38,4 +43,12 @@ var (
 	_ byte = C.SOME_CONST_3

 	_ = C.SOME_CONST_4
+
+	_ = C.SOME_CONST_b
+
+	_ = C.SOME_CONST_startspace
+
+	// constants passed by a command line parameter
+	_ = C.SOME_PARAM_CONST_invalid
+	_ = C.SOME_PARAM_CONST_valid
 )
@@ -1,9 +1,12 @@
 // CGo errors:
 //     testdata/errors.go:4:2: warning: some warning
 //     testdata/errors.go:11:9: error: unknown type name 'someType'
-//     testdata/errors.go:22:5: warning: another warning
+//     testdata/errors.go:26:5: warning: another warning
 //     testdata/errors.go:13:23: unexpected token ), expected end of expression
-//     testdata/errors.go:19:26: unexpected token ), expected end of expression
+//     testdata/errors.go:21:26: unexpected token ), expected end of expression
+//     testdata/errors.go:16:33: unexpected token ), expected end of expression
+//     testdata/errors.go:17:34: unexpected token ), expected end of expression
+//     -: unexpected token INT, expected end of expression

 // Type checking errors after CGo processing:
 //     testdata/errors.go:102: cannot use 2 << 10 (untyped int constant 2048) as C.char value in variable declaration (overflows)
@@ -11,6 +14,9 @@
 //     testdata/errors.go:108: undefined: C.SOME_CONST_1
 //     testdata/errors.go:110: cannot use C.SOME_CONST_3 (untyped int constant 1234) as byte value in variable declaration (overflows)
 //     testdata/errors.go:112: undefined: C.SOME_CONST_4
+//     testdata/errors.go:114: undefined: C.SOME_CONST_b
+//     testdata/errors.go:116: undefined: C.SOME_CONST_startspace
+//     testdata/errors.go:119: undefined: C.SOME_PARAM_CONST_invalid

 package main

@@ -58,3 +64,4 @@ type C.struct_point_t struct {
 type C.point_t = C.struct_point_t

 const C.SOME_CONST_3 = 1234
+const C.SOME_PARAM_CONST_valid = 3 + 4
@@ -60,7 +60,7 @@ func (c *Config) GOOS() string {
 }

 // GOARCH returns the GOARCH of the target. This might not always be the actual
-// archtecture: for example, the AVR target is not supported by the Go standard
+// architecture: for example, the AVR target is not supported by the Go standard
 // library so such targets will usually pretend to be linux/arm.
 func (c *Config) GOARCH() string {
 	return c.Target.GOARCH
@@ -72,6 +72,12 @@ func (c *Config) GOARM() string {
 	return c.Options.GOARM
 }

+// GOMIPS will return the GOMIPS environment variable given to the compiler when
+// building a program.
+func (c *Config) GOMIPS() string {
+	return c.Options.GOMIPS
+}
+
 // BuildTags returns the complete list of build tags used during this build.
 func (c *Config) BuildTags() []string {
 	tags := append([]string(nil), c.Target.BuildTags...) // copy slice (avoid a race)
@@ -207,14 +213,26 @@ func (c *Config) RP2040BootPatch() bool {
 	return false
 }

+// Return a canonicalized architecture name, so we don't have to deal with arm*
+// vs thumb* vs arm64.
+func CanonicalArchName(triple string) string {
+	arch := strings.Split(triple, "-")[0]
+	if arch == "arm64" {
+		return "aarch64"
+	}
+	if strings.HasPrefix(arch, "arm") || strings.HasPrefix(arch, "thumb") {
+		return "arm"
+	}
+	if arch == "mipsel" {
+		return "mips"
+	}
+	return arch
+}
+
 // MuslArchitecture returns the architecture name as used in musl libc. It is
 // usually the same as the first part of the LLVM triple, but not always.
 func MuslArchitecture(triple string) string {
-	arch := strings.Split(triple, "-")[0]
-	if strings.HasPrefix(arch, "arm") || strings.HasPrefix(arch, "thumb") {
-		arch = "arm"
-	}
-	return arch
+	return CanonicalArchName(triple)
 }

 // LibcPath returns the path to the libc directory. The libc path will be either
@@ -228,6 +246,9 @@ func (c *Config) LibcPath(name string) (path string, precompiled bool) {
 	if c.ABI() != "" {
 		archname += "-" + c.ABI()
 	}
+	if c.Target.SoftFloat {
+		archname += "-softfloat"
+	}

 	// Try to load a precompiled library.
 	precompiledDir := filepath.Join(goenv.Get("TINYGOROOT"), "pkg", archname, name)
@@ -440,7 +461,7 @@ func (c *Config) BinaryFormat(ext string) string {

 // Programmer returns the flash method and OpenOCD interface name given a
 // particular configuration. It may either be all configured in the target JSON
-// file or be modified using the -programmmer command-line option.
+// file or be modified using the -programmer command-line option.
 func (c *Config) Programmer() (method, openocdInterface string) {
 	switch c.Options.Programmer {
 	case "":
@@ -23,6 +23,7 @@ type Options struct {
 	GOOS            string // environment variable
 	GOARCH          string // environment variable
 	GOARM           string // environment variable (only used with GOARCH=arm)
+	GOMIPS          string // environment variable (only used with GOARCH=mips and GOARCH=mipsle)
 	Directory       string // working dir, leave it unset to use the current working dir
 	Target          string
 	Opt             string
@@ -53,6 +54,8 @@ type Options struct {
 	Monitor         bool
 	BaudRate        int
 	Timeout         time.Duration
+	WITPackage      string // pass through to wasm-tools component embed invocation
+	WITWorld        string // pass through to wasm-tools component embed -w option
 }

 // Verify performs a validation on the given options, raising an error if options are not valid.
@@ -30,6 +30,7 @@ type TargetSpec struct {
 	Features         string   `json:"features,omitempty"`
 	GOOS             string   `json:"goos,omitempty"`
 	GOARCH           string   `json:"goarch,omitempty"`
+	SoftFloat        bool     // used for non-baremetal systems (GOMIPS=softfloat etc)
 	BuildTags        []string `json:"build-tags,omitempty"`
 	GC               string   `json:"gc,omitempty"`
 	Scheduler        string   `json:"scheduler,omitempty"`
@@ -62,6 +63,8 @@ type TargetSpec struct {
 	JLinkDevice      string   `json:"jlink-device,omitempty"`
 	CodeModel        string   `json:"code-model,omitempty"`
 	RelocationModel  string   `json:"relocation-model,omitempty"`
+	WITPackage       string   `json:"wit-package,omitempty"`
+	WITWorld         string   `json:"wit-world,omitempty"`
 }

 // overrideProperties overrides all properties that are set in child into itself using reflection.
@@ -84,6 +87,10 @@ func (spec *TargetSpec) overrideProperties(child *TargetSpec) error {
 			if src.Uint() != 0 {
 				dst.Set(src)
 			}
+		case reflect.Bool:
+			if src.Bool() {
+				dst.Set(src)
+			}
 		case reflect.Ptr: // for pointers, copy if not nil
 			if !src.IsNil() {
 				dst.Set(src)
@@ -170,59 +177,7 @@ func (spec *TargetSpec) resolveInherits() error {
 // Load a target specification.
 func LoadTarget(options *Options) (*TargetSpec, error) {
 	if options.Target == "" {
-		// Configure based on GOOS/GOARCH environment variables (falling back to
-		// runtime.GOOS/runtime.GOARCH), and generate a LLVM target based on it.
-		var llvmarch string
-		switch options.GOARCH {
-		case "386":
-			llvmarch = "i386"
-		case "amd64":
-			llvmarch = "x86_64"
-		case "arm64":
-			llvmarch = "aarch64"
-		case "arm":
-			switch options.GOARM {
-			case "5":
-				llvmarch = "armv5"
-			case "6":
-				llvmarch = "armv6"
-			case "7":
-				llvmarch = "armv7"
-			default:
-				return nil, fmt.Errorf("invalid GOARM=%s, must be 5, 6, or 7", options.GOARM)
-			}
-		case "wasm":
-			llvmarch = "wasm32"
-		default:
-			llvmarch = options.GOARCH
-		}
-		llvmvendor := "unknown"
-		llvmos := options.GOOS
-		switch llvmos {
-		case "darwin":
-			// Use macosx* instead of darwin, otherwise darwin/arm64 will refer
-			// to iOS!
-			llvmos = "macosx10.12.0"
-			if llvmarch == "aarch64" {
-				// Looks like Apple prefers to call this architecture ARM64
-				// instead of AArch64.
-				llvmarch = "arm64"
-				llvmos = "macosx11.0.0"
-			}
-			llvmvendor = "apple"
-		case "wasip1":
-			llvmos = "wasi"
-		}
-		// Target triples (which actually have four components, but are called
-		// triples for historical reasons) have the form:
-		//   arch-vendor-os-environment
-		target := llvmarch + "-" + llvmvendor + "-" + llvmos
-		if options.GOOS == "windows" {
-			target += "-gnu"
-		} else if options.GOARCH == "arm" {
-			target += "-gnueabihf"
-		}
-		return defaultTarget(options.GOOS, options.GOARCH, target)
+		return defaultTarget(options)
 	}

 	// See whether there is a target specification for this target (e.g.
@@ -283,14 +238,13 @@ func GetTargetSpecs() (map[string]*TargetSpec, error) {
 	return maps, nil
 }

-func defaultTarget(goos, goarch, triple string) (*TargetSpec, error) {
-	// No target spec available. Use the default one, useful on most systems
-	// with a regular OS.
+// Load a target from environment variables (which default to
+// runtime.GOOS/runtime.GOARCH).
+func defaultTarget(options *Options) (*TargetSpec, error) {
 	spec := TargetSpec{
-		Triple:           triple,
-		GOOS:             goos,
-		GOARCH:           goarch,
-		BuildTags:        []string{goos, goarch},
+		GOOS:             options.GOOS,
+		GOARCH:           options.GOARCH,
+		BuildTags:        []string{options.GOOS, options.GOARCH},
 		GC:               "precise",
 		Scheduler:        "tasks",
 		Linker:           "cc",
@@ -298,34 +252,67 @@ func defaultTarget(goos, goarch, triple string) (*TargetSpec, error) {
 		GDB:              []string{"gdb"},
 		PortReset:        "false",
 	}
-	switch goarch {
+
+	// Configure target based on GOARCH.
+	var llvmarch string
+	switch options.GOARCH {
 	case "386":
+		llvmarch = "i386"
 		spec.CPU = "pentium4"
 		spec.Features = "+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87"
 	case "amd64":
+		llvmarch = "x86_64"
 		spec.CPU = "x86-64"
 		spec.Features = "+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87"
 	case "arm":
 		spec.CPU = "generic"
 		spec.CFlags = append(spec.CFlags, "-fno-unwind-tables", "-fno-asynchronous-unwind-tables")
-		switch strings.Split(triple, "-")[0] {
-		case "armv5":
+		switch options.GOARM {
+		case "5":
+			llvmarch = "armv5"
 			spec.Features = "+armv5t,+strict-align,-aes,-bf16,-d32,-dotprod,-fp-armv8,-fp-armv8d16,-fp-armv8d16sp,-fp-armv8sp,-fp16,-fp16fml,-fp64,-fpregs,-fullfp16,-mve.fp,-neon,-sha2,-thumb-mode,-vfp2,-vfp2sp,-vfp3,-vfp3d16,-vfp3d16sp,-vfp3sp,-vfp4,-vfp4d16,-vfp4d16sp,-vfp4sp"
-		case "armv6":
+		case "6":
+			llvmarch = "armv6"
 			spec.Features = "+armv6,+dsp,+fp64,+strict-align,+vfp2,+vfp2sp,-aes,-d32,-fp-armv8,-fp-armv8d16,-fp-armv8d16sp,-fp-armv8sp,-fp16,-fp16fml,-fullfp16,-neon,-sha2,-thumb-mode,-vfp3,-vfp3d16,-vfp3d16sp,-vfp3sp,-vfp4,-vfp4d16,-vfp4d16sp,-vfp4sp"
-		case "armv7":
+		case "7":
+			llvmarch = "armv7"
 			spec.Features = "+armv7-a,+d32,+dsp,+fp64,+neon,+vfp2,+vfp2sp,+vfp3,+vfp3d16,+vfp3d16sp,+vfp3sp,-aes,-fp-armv8,-fp-armv8d16,-fp-armv8d16sp,-fp-armv8sp,-fp16,-fp16fml,-fullfp16,-sha2,-thumb-mode,-vfp4,-vfp4d16,-vfp4d16sp,-vfp4sp"
+		default:
+			return nil, fmt.Errorf("invalid GOARM=%s, must be 5, 6, or 7", options.GOARM)
 		}
 	case "arm64":
 		spec.CPU = "generic"
-		if goos == "darwin" {
+		llvmarch = "aarch64"
+		if options.GOOS == "darwin" {
 			spec.Features = "+fp-armv8,+neon"
-		} else if goos == "windows" {
+			// Looks like Apple prefers to call this architecture ARM64
+			// instead of AArch64.
+			llvmarch = "arm64"
+		} else if options.GOOS == "windows" {
 			spec.Features = "+fp-armv8,+neon,-fmv"
 		} else { // linux
 			spec.Features = "+fp-armv8,+neon,-fmv,-outline-atomics"
 		}
+	case "mips", "mipsle":
+		spec.CPU = "mips32r2"
+		spec.CFlags = append(spec.CFlags, "-fno-pic")
+		if options.GOOS == "mips" {
+			llvmarch = "mips" // big endian
+		} else {
+			llvmarch = "mipsel" // little endian
+		}
+		switch options.GOMIPS {
+		case "hardfloat":
+			spec.Features = "+fpxx,+mips32r2,+nooddspreg,-noabicalls"
+		case "softfloat":
+			spec.SoftFloat = true
+			spec.Features = "+mips32r2,+soft-float,-noabicalls"
+			spec.CFlags = append(spec.CFlags, "-msoft-float")
+		default:
+			return nil, fmt.Errorf("invalid GOMIPS=%s: must be hardfloat or softfloat", options.GOMIPS)
+		}
 	case "wasm":
+		llvmarch = "wasm32"
 		spec.CPU = "generic"
 		spec.Features = "+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext"
 		spec.BuildTags = append(spec.BuildTags, "tinygo.wasm")
@@ -334,24 +321,37 @@ func defaultTarget(goos, goarch, triple string) (*TargetSpec, error) {
 			"-mnontrapping-fptoint",
 			"-msign-ext",
 		)
+	default:
+		return nil, fmt.Errorf("unknown GOARCH=%s", options.GOARCH)
 	}
-	if goos == "darwin" {
+
+	// Configure target based on GOOS.
+	llvmos := options.GOOS
+	llvmvendor := "unknown"
+	switch options.GOOS {
+	case "darwin":
+		platformVersion := "10.12.0"
+		if options.GOARCH == "arm64" {
+			platformVersion = "11.0.0" // first macosx platform with arm64 support
+		}
+		llvmvendor = "apple"
 		spec.Linker = "ld.lld"
 		spec.Libc = "darwin-libSystem"
-		arch := strings.Split(triple, "-")[0]
-		platformVersion := strings.TrimPrefix(strings.Split(triple, "-")[2], "macosx")
+		// Use macosx* instead of darwin, otherwise darwin/arm64 will refer to
+		// iOS!
+		llvmos = "macosx" + platformVersion
 		spec.LDFlags = append(spec.LDFlags,
 			"-flavor", "darwin",
 			"-dead_strip",
-			"-arch", arch,
+			"-arch", llvmarch,
 			"-platform_version", "macos", platformVersion, platformVersion,
 		)
-	} else if goos == "linux" {
+	case "linux":
 		spec.Linker = "ld.lld"
 		spec.RTLib = "compiler-rt"
 		spec.Libc = "musl"
 		spec.LDFlags = append(spec.LDFlags, "--gc-sections")
-		if goarch == "arm64" {
+		if options.GOARCH == "arm64" {
 			// Disable outline atomics. For details, see:
 			// https://cpufun.substack.com/p/atomics-in-aarch64
 			// A better way would be to fully support outline atomics, which
@@ -365,7 +365,7 @@ func defaultTarget(goos, goarch, triple string) (*TargetSpec, error) {
 			// proper threading.
 			spec.CFlags = append(spec.CFlags, "-mno-outline-atomics")
 		}
-	} else if goos == "windows" {
+	case "windows":
 		spec.Linker = "ld.lld"
 		spec.Libc = "mingw-w64"
 		// Note: using a medium code model, low image base and no ASLR
@@ -374,7 +374,7 @@ func defaultTarget(goos, goarch, triple string) (*TargetSpec, error) {
 		// normally present in Go (without explicitly opting in).
 		// For more discussion:
 		// https://groups.google.com/g/Golang-nuts/c/Jd9tlNc6jUE/m/Zo-7zIP_m3MJ?pli=1
-		switch goarch {
+		switch options.GOARCH {
 		case "amd64":
 			spec.LDFlags = append(spec.LDFlags,
 				"-m", "i386pep",
@@ -391,7 +391,7 @@ func defaultTarget(goos, goarch, triple string) (*TargetSpec, error) {
 			"--no-insert-timestamp",
 			"--no-dynamicbase",
 		)
-	} else if goos == "wasip1" {
+	case "wasip1":
 		spec.GC = "" // use default GC
 		spec.Scheduler = "asyncify"
 		spec.Linker = "wasm-ld"
@@ -407,24 +407,43 @@ func defaultTarget(goos, goarch, triple string) (*TargetSpec, error) {
 			"src/runtime/asm_tinygowasm.S",
 			"src/internal/task/task_asyncify_wasm.S",
 		)
-	} else {
-		spec.LDFlags = append(spec.LDFlags, "-no-pie", "-Wl,--gc-sections") // WARNING: clang < 5.0 requires -nopie
+		llvmos = "wasi"
+	default:
+		return nil, fmt.Errorf("unknown GOOS=%s", options.GOOS)
 	}
-	if goarch != "wasm" {
+
+	// Target triples (which actually have four components, but are called
+	// triples for historical reasons) have the form:
+	//   arch-vendor-os-environment
+	spec.Triple = llvmarch + "-" + llvmvendor + "-" + llvmos
+	if options.GOOS == "windows" {
+		spec.Triple += "-gnu"
+	} else if options.GOARCH == "arm" {
+		spec.Triple += "-gnueabihf"
+	}
+
+	// Add extra assembly files (needed for the scheduler etc).
+	if options.GOARCH != "wasm" {
 		suffix := ""
-		if goos == "windows" && goarch == "amd64" {
+		if options.GOOS == "windows" && options.GOARCH == "amd64" {
 			// Windows uses a different calling convention on amd64 from other
 			// operating systems so we need separate assembly files.
 			suffix = "_windows"
 		}
-		spec.ExtraFiles = append(spec.ExtraFiles, "src/runtime/asm_"+goarch+suffix+".S")
-		spec.ExtraFiles = append(spec.ExtraFiles, "src/internal/task/task_stack_"+goarch+suffix+".S")
+		asmGoarch := options.GOARCH
+		if options.GOARCH == "mips" || options.GOARCH == "mipsle" {
+			asmGoarch = "mipsx"
+		}
+		spec.ExtraFiles = append(spec.ExtraFiles, "src/runtime/asm_"+asmGoarch+suffix+".S")
+		spec.ExtraFiles = append(spec.ExtraFiles, "src/internal/task/task_stack_"+asmGoarch+suffix+".S")
 	}
-	if goarch != runtime.GOARCH {
+
+	// Configure the emulator.
+	if options.GOARCH != runtime.GOARCH {
 		// Some educated guesses as to how to invoke helper programs.
 		spec.GDB = []string{"gdb-multiarch"}
-		if goos == "linux" {
-			switch goarch {
+		if options.GOOS == "linux" {
+			switch options.GOARCH {
 			case "386":
 				// amd64 can _usually_ run 32-bit programs, so skip the emulator in that case.
 				if runtime.GOARCH != "amd64" {
@@ -436,14 +455,19 @@ func defaultTarget(goos, goarch, triple string) (*TargetSpec, error) {
 				spec.Emulator = "qemu-arm {}"
 			case "arm64":
 				spec.Emulator = "qemu-aarch64 {}"
+			case "mips":
+				spec.Emulator = "qemu-mips {}"
+			case "mipsle":
+				spec.Emulator = "qemu-mipsel {}"
 			}
 		}
 	}
-	if goos != runtime.GOOS {
-		if goos == "windows" {
+	if options.GOOS != runtime.GOOS {
+		if options.GOOS == "windows" {
 			spec.Emulator = "wine {}"
 		}
 	}
+
 	return &spec, nil
 }

@@ -99,7 +99,7 @@ func (b *builder) createUnsafeSliceStringCheck(name string, ptr, len llvm.Value,
 	// However, in practice, it is also necessary to check that the length is
 	// not too big that a GEP wouldn't be possible without wrapping the pointer.
 	// These two checks (non-negative and not too big) can be merged into one
-	// using an unsiged greater than.
+	// using an unsigned greater than.

 	// Make sure the len value is at least as big as a uintptr.
 	len = b.extendInteger(len, lenType, b.uintptrType)
@@ -1,9 +1,6 @@
 package compiler

 import (
-	"fmt"
-	"strings"
-
 	"tinygo.org/x/go-llvm"
 )

@@ -15,20 +12,6 @@ func (b *builder) createAtomicOp(name string) llvm.Value {
 	case "AddInt32", "AddInt64", "AddUint32", "AddUint64", "AddUintptr":
 		ptr := b.getValue(b.fn.Params[0], getPos(b.fn))
 		val := b.getValue(b.fn.Params[1], getPos(b.fn))
-		if strings.HasPrefix(b.Triple, "avr") {
-			// AtomicRMW does not work on AVR as intended:
-			// - There are some register allocation issues (fixed by https://reviews.llvm.org/D97127 which is not yet in a usable LLVM release)
-			// - The result is the new value instead of the old value
-			vType := val.Type()
-			name := fmt.Sprintf("__sync_fetch_and_add_%d", vType.IntTypeWidth()/8)
-			fn := b.mod.NamedFunction(name)
-			if fn.IsNil() {
-				fn = llvm.AddFunction(b.mod, name, llvm.FunctionType(vType, []llvm.Type{ptr.Type(), vType}, false))
-			}
-			oldVal := b.createCall(fn.GlobalValueType(), fn, []llvm.Value{ptr, val}, "")
-			// Return the new value, not the original value returned.
-			return b.CreateAdd(oldVal, val, "")
-		}
 		oldVal := b.CreateAtomicRMW(llvm.AtomicRMWBinOpAdd, ptr, val, llvm.AtomicOrderingSequentiallyConsistent, true)
 		// Return the new value, not the original value returned by atomicrmw.
 		return b.CreateAdd(oldVal, val, "")
@@ -70,21 +70,25 @@ func (b *builder) createRuntimeInvoke(fnName string, args []llvm.Value, name str
 // createCall creates a call to the given function with the arguments possibly
 // expanded.
 func (b *builder) createCall(fnType llvm.Type, fn llvm.Value, args []llvm.Value, name string) llvm.Value {
-	expanded := make([]llvm.Value, 0, len(args))
-	for _, arg := range args {
-		fragments := b.expandFormalParam(arg)
-		expanded = append(expanded, fragments...)
-	}
-	return b.CreateCall(fnType, fn, expanded, name)
+	return b.CreateCall(fnType, fn, b.expandFormalParams(args), name)
 }

 // createInvoke is like createCall but continues execution at the landing pad if
 // the call resulted in a panic.
 func (b *builder) createInvoke(fnType llvm.Type, fn llvm.Value, args []llvm.Value, name string) llvm.Value {
-	if b.hasDeferFrame() {
+	switch b.deferFrameType() {
+	case recoverInlineAsm:
 		b.createInvokeCheckpoint()
+		return b.createCall(fnType, fn, args, name)
+	case recoverWasmEH:
+		continueBB := b.insertBasicBlock("invoke.cont")
+		call := b.CreateInvoke(fnType, fn, b.expandFormalParams(args), continueBB, b.landingpad, name)
+		b.SetInsertPointAtEnd(continueBB)
+		b.blockExits[b.currentBlock] = continueBB
+		return call
+	default:
+		return b.createCall(fnType, fn, args, name)
 	}
-	return b.createCall(fnType, fn, args, name)
 }

 // Expand an argument type to a list that can be used in a function call
@@ -123,6 +127,17 @@ func (b *builder) expandFormalParamOffsets(t llvm.Type) []uint64 {
 	}
 }

+// expandFormalParams expands every param in the params slice like
+// expandFormalParam.
+func (b *builder) expandFormalParams(params []llvm.Value) []llvm.Value {
+	expanded := make([]llvm.Value, 0, len(params))
+	for _, arg := range params {
+		fragments := b.expandFormalParam(arg)
+		expanded = append(expanded, fragments...)
+	}
+	return expanded
+}
+
 // expandFormalParam splits a formal param value into pieces, so it can be
 // passed directly as part of a function call. For example, it splits up small
 // structs into individual fields. It is the equivalent of expandFormalParamType
@@ -242,7 +242,7 @@ func NewTargetMachine(config *Config) (llvm.TargetMachine, error) {
 }

 // Sizes returns a types.Sizes appropriate for the given target machine. It
-// includes the correct int size and aligment as is necessary for the Go
+// includes the correct int size and alignment as is necessary for the Go
 // typechecker.
 func Sizes(machine llvm.TargetMachine) types.Sizes {
 	targetData := machine.CreateTargetData()
@@ -355,7 +355,10 @@ func CompilePackage(moduleName string, pkg *loader.Package, ssaPkg *ssa.Package,
 }

 func (c *compilerContext) getRuntimeType(name string) types.Type {
-	return c.runtimePkg.Scope().Lookup(name).(*types.TypeName).Type()
+	if typ, ok := c.runtimePkg.Scope().Lookup(name).(*types.TypeName); ok {
+		return typ.Type()
+	}
+	panic("runtime type not found: " + name)
 }

 // getLLVMRuntimeType obtains a named type from the runtime package and returns
@@ -1350,7 +1353,7 @@ func (b *builder) createFunction() {
 		b.CreateBr(b.afterDefersBlock[i])
 	}

-	if b.hasDeferFrame() {
+	if b.deferFrameType() != recoverNone {
 		// Create the landing pad block, where execution continues after a
 		// panic.
 		b.createLandingPad()
@@ -1487,8 +1490,11 @@ func (b *builder) createInstruction(instr ssa.Instruction) {
 		b.createRuntimeInvoke("_panic", []llvm.Value{value}, "")
 		b.CreateUnreachable()
 	case *ssa.Return:
-		if b.hasDeferFrame() {
-			b.createRuntimeCall("destroyDeferFrame", []llvm.Value{b.deferFrame}, "")
+		switch b.deferFrameType() {
+		case recoverInlineAsm:
+			b.createRuntimeCall("destroyDeferFrameInlineAsm", []llvm.Value{b.deferFrame}, "")
+		case recoverWasmEH:
+			b.createRuntimeCall("destroyDeferFrameWasmEH", []llvm.Value{b.deferFrame}, "")
 		}
 		if len(instr.Results) == 0 {
 			b.CreateRetVoid()
@@ -1741,7 +1747,7 @@ func (b *builder) createBuiltin(argTypes []types.Type, argValues []llvm.Value, c
 		return b.CreateExtractValue(cplx, 0, "real"), nil
 	case "recover":
 		useParentFrame := uint64(0)
-		if b.hasDeferFrame() {
+		if b.fn.Recover != nil {
 			// recover() should return the panic value of the parent function,
 			// not of the current function.
 			useParentFrame = 1
@@ -1846,16 +1852,13 @@ func (b *builder) createFunctionCall(instr *ssa.CallCommon) (llvm.Value, error)
 			return b.emitSV64Call(instr.Args, getPos(instr))
 		case strings.HasPrefix(name, "(device/riscv.CSR)."):
 			return b.emitCSROperation(instr)
-		case strings.HasPrefix(name, "syscall.Syscall") || strings.HasPrefix(name, "syscall.RawSyscall"):
+		case strings.HasPrefix(name, "syscall.Syscall") || strings.HasPrefix(name, "syscall.RawSyscall") || strings.HasPrefix(name, "golang.org/x/sys/unix.Syscall") || strings.HasPrefix(name, "golang.org/x/sys/unix.RawSyscall"):
 			return b.createSyscall(instr)
-		case strings.HasPrefix(name, "syscall.rawSyscallNoError"):
+		case strings.HasPrefix(name, "syscall.rawSyscallNoError") || strings.HasPrefix(name, "golang.org/x/sys/unix.RawSyscallNoError"):
 			return b.createRawSyscallNoError(instr)
 		case name == "runtime.supportsRecover":
-			supportsRecover := uint64(0)
-			if b.supportsRecover() {
-				supportsRecover = 1
-			}
-			return llvm.ConstInt(b.ctx.Int1Type(), supportsRecover, false), nil
+			supportsRecover := uint64(b.supportsRecover())
+			return llvm.ConstInt(b.ctx.Int8Type(), supportsRecover, false), nil
 		case name == "runtime.panicStrategy":
 			// These constants are defined in src/runtime/panic.go.
 			panicStrategy := map[string]uint64{
@@ -2017,6 +2020,8 @@ func (b *builder) createExpr(expr ssa.Value) (llvm.Value, error) {
 			sizeValue := llvm.ConstInt(b.uintptrType, size, false)
 			layoutValue := b.createObjectLayout(typ, expr.Pos())
 			buf := b.createRuntimeCall("alloc", []llvm.Value{sizeValue, layoutValue}, expr.Comment)
+			align := b.targetData.ABITypeAlignment(typ)
+			buf.AddCallSiteAttribute(0, b.ctx.CreateEnumAttribute(llvm.AttributeKindID("align"), uint64(align)))
 			return buf, nil
 		} else {
 			buf := llvmutil.CreateEntryBlockAlloca(b.Builder, typ, expr.Comment)
@@ -2223,6 +2228,7 @@ func (b *builder) createExpr(expr ssa.Value) (llvm.Value, error) {
 		sliceType := expr.Type().Underlying().(*types.Slice)
 		llvmElemType := b.getLLVMType(sliceType.Elem())
 		elemSize := b.targetData.TypeAllocSize(llvmElemType)
+		elemAlign := b.targetData.ABITypeAlignment(llvmElemType)
 		elemSizeValue := llvm.ConstInt(b.uintptrType, elemSize, false)

 		maxSize := b.maxSliceSize(llvmElemType)
@@ -2246,6 +2252,7 @@ func (b *builder) createExpr(expr ssa.Value) (llvm.Value, error) {
 		sliceSize := b.CreateBinOp(llvm.Mul, elemSizeValue, sliceCapCast, "makeslice.cap")
 		layoutValue := b.createObjectLayout(llvmElemType, expr.Pos())
 		slicePtr := b.createRuntimeCall("alloc", []llvm.Value{sliceSize, layoutValue}, "makeslice.buf")
+		slicePtr.AddCallSiteAttribute(0, b.ctx.CreateEnumAttribute(llvm.AttributeKindID("align"), uint64(elemAlign)))

 		// Extend or truncate if necessary. This is safe as we've already done
 		// the bounds check.
@@ -44,6 +44,7 @@ func TestCompiler(t *testing.T) {
 		{"interface.go", "", ""},
 		{"func.go", "", ""},
 		{"defer.go", "cortex-m-qemu", ""},
+		{"defer.go", "wasm", "none"},
 		{"pragma.go", "", ""},
 		{"goroutine.go", "wasm", "asyncify"},
 		{"goroutine.go", "cortex-m-qemu", "tasks"},
@@ -16,34 +16,54 @@ package compiler
 import (
 	"go/types"
 	"strconv"
+	"strings"

 	"github.com/tinygo-org/tinygo/compiler/llvmutil"
 	"golang.org/x/tools/go/ssa"
 	"tinygo.org/x/go-llvm"
 )

+type recoverType uint8
+
+const (
+	// Note: this matches recoverSupport in src/runtime/panic.go
+	recoverNone recoverType = iota
+	recoverInlineAsm
+	recoverWasmEH // WebAssembly exception handling
+)
+
 // supportsRecover returns whether the compiler supports the recover() builtin
 // for the current architecture.
-func (b *builder) supportsRecover() bool {
-	switch b.archFamily() {
+func (c *compilerContext) supportsRecover() recoverType {
+	switch c.archFamily() {
 	case "wasm32":
-		// Probably needs to be implemented using the exception handling
-		// proposal of WebAssembly:
-		// https://github.com/WebAssembly/exception-handling
-		return false
+		if !strings.Contains(c.Features, "+exception-handling") {
+			// No support for the exception handling proposal.
+			return recoverNone
+		}
+		if c.Scheduler == "asyncify" {
+			// Asyncify does not support WebAssembly exception handling.
+			// It exits with the following message:
+			//     unexpected expression type
+			//     UNREACHABLE executed at $TINYGOROOT/lib/binaryen/src/passes/Asyncify.cpp:1142!
+			// See: https://github.com/WebAssembly/binaryen/issues/4470
+			return recoverNone
+		}
+		// Use WebAssembly exception handling.
+		return recoverWasmEH
 	case "riscv64", "xtensa":
 		// TODO: add support for these architectures
-		return false
+		return recoverNone
 	default:
-		return true
+		return recoverInlineAsm
 	}
 }

-// hasDeferFrame returns whether the current function needs to catch panics and
-// run defers.
-func (b *builder) hasDeferFrame() bool {
+// deferFrameType returns the defer type for this function. It is always
+// recoverNone for functions without defer.
+func (b *builder) deferFrameType() recoverType {
 	if b.fn.Recover == nil {
-		return false
+		return recoverNone
 	}
 	return b.supportsRecover()
 }
@@ -63,21 +83,40 @@ func (b *builder) deferInitFunc() {
 	b.deferPtr = b.CreateAlloca(b.dataPtrType, "deferPtr")
 	b.CreateStore(llvm.ConstPointerNull(b.dataPtrType), b.deferPtr)

-	if b.hasDeferFrame() {
+	switch b.deferFrameType() {
+	case recoverInlineAsm:
 		// Set up the defer frame with the current stack pointer.
 		// This assumes that the stack pointer doesn't move outside of the
 		// function prologue/epilogue (an invariant maintained by TinyGo but
 		// possibly broken by the C alloca function).
 		// The frame pointer is _not_ saved, because it is marked as clobbered
 		// in the setjmp-like inline assembly.
-		deferFrameType := b.getLLVMRuntimeType("deferFrame")
+		deferFrameType := b.getLLVMRuntimeType("deferFrameInlineAsm")
 		b.deferFrame = b.CreateAlloca(deferFrameType, "deferframe.buf")
 		stackPointer := b.readStackPointer()
-		b.createRuntimeCall("setupDeferFrame", []llvm.Value{b.deferFrame, stackPointer}, "")
+		b.createRuntimeCall("setupDeferFrameInlineAsm", []llvm.Value{b.deferFrame, stackPointer}, "")

 		// Create the landing pad block, which is where control transfers after
 		// a panic.
 		b.landingpad = b.ctx.AddBasicBlock(b.llvmFn, "lpad")
+	case recoverWasmEH:
+		// Set a personality function, which is required by LLVM but not
+		// actually called. __gxx_wasm_personality_v0 is the only one that is
+		// acceptable to the WebAssembly backend it seems.
+		personality := b.mod.NamedFunction("__gxx_wasm_personality_v0")
+		if personality.IsNil() {
+			fnType := llvm.FunctionType(b.ctx.Int32Type(), nil, true)
+			personality = llvm.AddFunction(b.mod, "__gxx_wasm_personality_v0", fnType)
+		}
+		b.llvmFn.SetPersonality(personality)
+
+		// Set up the defer frame.
+		deferFrameType := b.getLLVMRuntimeType("deferFrameWasmEH")
+		b.deferFrame = b.CreateAlloca(deferFrameType, "deferframe.buf")
+		b.createRuntimeCall("setupDeferFrameWasmEH", []llvm.Value{b.deferFrame}, "")
+
+		// Create the landing pad where the 'throw' instruction will jump to.
+		b.landingpad = b.ctx.AddBasicBlock(b.llvmFn, "catch.dispatch")
 	}
 }

@@ -95,6 +134,43 @@ func (b *builder) createLandingPad() {
 		b.SetCurrentDebugLocation(uint(pos.Line), uint(pos.Column), b.difunc, llvm.Metadata{})
 	}

+	if b.supportsRecover() == recoverWasmEH {
+		// Insert exception handling instructions.
+		// This emulates C++ exceptions, as if every function is wrapped like
+		// this:
+		//
+		//     try {
+		//         function body
+		//     } catch (...) {
+		//         run all defers
+		//     }
+		//     if deferFrame.Panicking {
+		//         // re-raise the same panic message
+		//         panic(previousPanic)
+		//     }
+		//
+		// This means that if there is a C++ exception in the program, it will
+		// get eaten by the Go code. This is fixable if needed (by checking
+		// whether it's actually a TinyGo exception and re-raising the same
+		// exception if it isn't after running deferred functions).
+		// For more information about C++ exception support in WebAssembly:
+		// https://github.com/WebAssembly/tool-conventions/blob/main/EHScheme.md
+
+		// basic block: catch.dispatch
+		catchStartBB := b.insertBasicBlock("catch.start")
+		catchswitch := b.CreateCatchSwitch(llvm.Value{}, llvm.BasicBlock{}, 1, "")
+		catchswitch.AddHandler(catchStartBB)
+
+		// basic block: catch.start
+		b.SetInsertPointAtEnd(catchStartBB)
+		catchpad := b.CreateCatchPad(catchswitch, []llvm.Value{llvm.ConstNull(b.dataPtrType)}, "")
+		rundefersBB := b.insertBasicBlock("rundefers")
+		b.CreateCatchRet(catchpad, rundefersBB)
+
+		// basic block: rundefers
+		b.SetInsertPointAtEnd(rundefersBB)
+	}
+
 	b.createRunDefers()

 	// Continue at the 'recover' block, which returns to the parent in an
@@ -187,6 +263,18 @@ std z+5, r29
 ldi r24, 0
 1:`
 		constraints = "={r24},z,~{r0},~{r2},~{r3},~{r4},~{r5},~{r6},~{r7},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15},~{r16},~{r17},~{r18},~{r19},~{r20},~{r21},~{r22},~{r23},~{r25},~{r26},~{r27}"
+	case "mips":
+		// $4 flag (zero or non-zero)
+		// $5 defer frame
+		asmString = `
+.set noat
+move $$4, $$zero
+jal 1f
+1:
+addiu $$ra, 8
+sw $$ra, 4($$5)
+.set at`
+		constraints = "={$4},{$5},~{$1},~{$2},~{$3},~{$5},~{$6},~{$7},~{$8},~{$9},~{$10},~{$11},~{$12},~{$13},~{$14},~{$15},~{$16},~{$17},~{$18},~{$19},~{$20},~{$21},~{$22},~{$23},~{$24},~{$25},~{$26},~{$27},~{$28},~{$29},~{$30},~{$31},~{$f0},~{$f1},~{$f2},~{$f3},~{$f4},~{$f5},~{$f6},~{$f7},~{$f8},~{$f9},~{$f10},~{$f11},~{$f12},~{$f13},~{$f14},~{$f15},~{$f16},~{$f17},~{$f18},~{$f19},~{$f20},~{$f21},~{$f22},~{$f23},~{$f24},~{$f25},~{$f26},~{$f27},~{$f28},~{$f29},~{$f30},~{$f31},~{memory}"
 	case "riscv32":
 		asmString = `
 la a2, 1f
@@ -420,11 +508,25 @@ func (b *builder) createRunDefers() {
 	//         }
 	//     }

-	// Create loop, in the order: loophead, loop, callback0, callback1, ..., unreachable, end.
+	// Create loop, in the order:
+	//   - loophead
+	//   - loop
+	//   - callback0
+	//   - callback1
+	//   - callback*
+	//   - unreachable
+	//   - catch.dispatch (if wasm EH)
+	//   - catch.start (if wasm EH)
+	//   - end
+	var catchDispatch, catchStart llvm.BasicBlock
 	end := b.insertBasicBlock("rundefers.end")
 	unreachable := b.ctx.InsertBasicBlock(end, "rundefers.default")
 	loop := b.ctx.InsertBasicBlock(unreachable, "rundefers.loop")
 	loophead := b.ctx.InsertBasicBlock(loop, "rundefers.loophead")
+	if b.supportsRecover() == recoverWasmEH {
+		catchDispatch = b.ctx.InsertBasicBlock(end, "rundefers.catch.dispatch")
+		catchStart = b.ctx.InsertBasicBlock(end, "rundefers.catch.start")
+	}
 	b.CreateBr(loophead)

 	// Create loop head:
@@ -459,6 +561,9 @@ func (b *builder) createRunDefers() {
 		block := b.insertBasicBlock("rundefers.callback" + strconv.Itoa(i))
 		sw.AddCase(llvm.ConstInt(b.uintptrType, uint64(i), false), block)
 		b.SetInsertPointAtEnd(block)
+		var fnType llvm.Type
+		var llvmFn llvm.Value
+		var forwardParams []llvm.Value
 		switch callback := callback.(type) {
 		case *ssa.CallCommon:
 			// Call on an value or interface value.
@@ -479,7 +584,6 @@ func (b *builder) createRunDefers() {
 			}

 			// Extract the params from the struct (including receiver).
-			forwardParams := []llvm.Value{}
 			zero := llvm.ConstInt(b.ctx.Int32Type(), 0, false)
 			deferredCallType := b.ctx.StructType(valueTypes, false)
 			for i := 2; i < len(valueTypes); i++ {
@@ -488,9 +592,6 @@ func (b *builder) createRunDefers() {
 				forwardParams = append(forwardParams, forwardParam)
 			}

-			var fnPtr llvm.Value
-			var fnType llvm.Type
-
 			if !callback.IsInvoke() {
 				// Isolate the func value.
 				funcValue := forwardParams[0]
@@ -498,7 +599,7 @@ func (b *builder) createRunDefers() {

 				//Get function pointer and context
 				var context llvm.Value
-				fnPtr, context = b.decodeFuncValue(funcValue)
+				llvmFn, context = b.decodeFuncValue(funcValue)
 				fnType = b.getLLVMFunctionType(callback.Signature())

 				//Pass context
@@ -507,8 +608,8 @@ func (b *builder) createRunDefers() {
 				// Move typecode from the start to the end of the list of
 				// parameters.
 				forwardParams = append(forwardParams[1:], forwardParams[0])
-				fnPtr = b.getInvokeFunction(callback)
-				fnType = fnPtr.GlobalValueType()
+				llvmFn = b.getInvokeFunction(callback)
+				fnType = llvmFn.GlobalValueType()

 				// Add the context parameter. An interface call cannot also be a
 				// closure but we have to supply the parameter anyway for platforms
@@ -516,8 +617,6 @@ func (b *builder) createRunDefers() {
 				forwardParams = append(forwardParams, llvm.Undef(b.dataPtrType))
 			}

-			b.createCall(fnType, fnPtr, forwardParams, "")
-
 		case *ssa.Function:
 			// Direct call.

@@ -529,7 +628,6 @@ func (b *builder) createRunDefers() {
 			deferredCallType := b.ctx.StructType(valueTypes, false)

 			// Extract the params from the struct.
-			forwardParams := []llvm.Value{}
 			zero := llvm.ConstInt(b.ctx.Int32Type(), 0, false)
 			for i := range getParams(callback.Signature) {
 				gep := b.CreateInBoundsGEP(deferredCallType, deferData, []llvm.Value{zero, llvm.ConstInt(b.ctx.Int32Type(), uint64(i+2), false)}, "gep")
@@ -545,9 +643,7 @@ func (b *builder) createRunDefers() {
 				forwardParams = append(forwardParams, llvm.Undef(b.dataPtrType))
 			}

-			// Call real function.
-			fnType, fn := b.getFunction(callback)
-			b.createInvoke(fnType, fn, forwardParams, "")
+			fnType, llvmFn = b.getFunction(callback)

 		case *ssa.MakeClosure:
 			// Get the real defer struct type and cast to it.
@@ -561,7 +657,6 @@ func (b *builder) createRunDefers() {
 			deferredCallType := b.ctx.StructType(valueTypes, false)

 			// Extract the params from the struct.
-			forwardParams := []llvm.Value{}
 			zero := llvm.ConstInt(b.ctx.Int32Type(), 0, false)
 			for i := 2; i < len(valueTypes); i++ {
 				gep := b.CreateInBoundsGEP(deferredCallType, deferData, []llvm.Value{zero, llvm.ConstInt(b.ctx.Int32Type(), uint64(i), false)}, "")
@@ -570,8 +665,7 @@ func (b *builder) createRunDefers() {
 			}

 			// Call deferred function.
-			fnType, llvmFn := b.getFunction(fn)
-			b.createCall(fnType, llvmFn, forwardParams, "")
+			fnType, llvmFn = b.getFunction(fn)
 		case *ssa.Builtin:
 			db := b.deferBuiltinFuncs[callback]

@@ -599,12 +693,20 @@ func (b *builder) createRunDefers() {
 			if err != nil {
 				b.diagnostics = append(b.diagnostics, err)
 			}
+			b.CreateBr(loophead)
+			continue
 		default:
 			panic("unknown deferred function type")
 		}

-		// Branch back to the start of the loop.
-		b.CreateBr(loophead)
+		// Call the deferred function.
+		if b.supportsRecover() == recoverWasmEH {
+			b.CreateInvoke(fnType, llvmFn, b.expandFormalParams(forwardParams), loophead, catchDispatch, "")
+		} else {
+			b.createInvoke(fnType, llvmFn, forwardParams, "")
+			// Branch back to the start of the loop.
+			b.CreateBr(loophead)
+		}
 	}

 	// Create default unreachable block:
@@ -614,6 +716,19 @@ func (b *builder) createRunDefers() {
 	b.SetInsertPointAtEnd(unreachable)
 	b.CreateUnreachable()

+	// Ignore any exception that might have occured while running the deferred
+	// functions. The compiler will insert a check whether the function is still
+	// panicking before return, so no panic gets lost.
+	if b.supportsRecover() == recoverWasmEH {
+		b.SetInsertPointAtEnd(catchDispatch)
+		catchswitch := b.CreateCatchSwitch(llvm.Value{}, llvm.BasicBlock{}, 1, "")
+		catchswitch.AddHandler(catchStart)
+
+		b.SetInsertPointAtEnd(catchStart)
+		catchpad := b.CreateCatchPad(catchswitch, []llvm.Value{llvm.ConstNull(b.dataPtrType)}, "")
+		b.CreateCatchRet(catchpad, loophead)
+	}
+
 	// End of loop.
 	b.SetInsertPointAtEnd(end)
 }
@@ -78,7 +78,7 @@ func (b *builder) trackValue(value llvm.Value) {
 	}
 }

-// trackPointer creates a call to runtime.trackPointer, bitcasting the poitner
+// trackPointer creates a call to runtime.trackPointer, bitcasting the pointer
 // first if needed. The input value must be of LLVM pointer type.
 func (b *builder) trackPointer(value llvm.Value) {
 	b.createRuntimeCall("trackPointer", []llvm.Value{value, b.stackChainAlloca}, "")
@@ -86,7 +86,7 @@ func (b *builder) createMakeInterface(val llvm.Value, typ types.Type, pos token.

 // extractValueFromInterface extract the value from an interface value
 // (runtime._interface) under the assumption that it is of the type given in
-// llvmType. The behavior is undefied if the interface is nil or llvmType
+// llvmType. The behavior is undefined if the interface is nil or llvmType
 // doesn't match the underlying type of the interface.
 func (b *builder) extractValueFromInterface(itf llvm.Value, llvmType llvm.Type) llvm.Value {
 	valuePtr := b.CreateExtractValue(itf, 1, "typeassert.value.ptr")
@@ -514,8 +514,7 @@ var basicTypeNames = [...]string{
 func getTypeCodeName(t types.Type) (string, bool) {
 	switch t := t.(type) {
 	case *types.Named:
-		// Note: check for `t.Obj().Pkg() != nil` for Go 1.18 only.
-		if t.Obj().Pkg() != nil && t.Obj().Parent() != t.Obj().Pkg().Scope() {
+		if t.Obj().Parent() != t.Obj().Pkg().Scope() {
 			return "named:" + t.String() + "$local", true
 		}
 		return "named:" + t.String(), false
@@ -7,6 +7,7 @@ import (
 	"math/big"
 	"strings"

+	"github.com/tinygo-org/tinygo/compileopts"
 	"github.com/tinygo-org/tinygo/compiler/llvmutil"
 	"tinygo.org/x/go-llvm"
 )
@@ -127,12 +128,14 @@ func (b *builder) emitPointerPack(values []llvm.Value) llvm.Value {

 		// Packed data is bigger than a pointer, so allocate it on the heap.
 		sizeValue := llvm.ConstInt(b.uintptrType, size, false)
+		align := b.targetData.ABITypeAlignment(packedType)
 		alloc := b.mod.NamedFunction("runtime.alloc")
 		packedAlloc := b.CreateCall(alloc.GlobalValueType(), alloc, []llvm.Value{
 			sizeValue,
 			llvm.ConstNull(b.dataPtrType),
 			llvm.Undef(b.dataPtrType), // unused context parameter
 		}, "")
+		packedAlloc.AddCallSiteAttribute(0, b.ctx.CreateEnumAttribute(llvm.AttributeKindID("align"), uint64(align)))
 		if b.NeedsStackObjects {
 			b.trackPointer(packedAlloc)
 		}
@@ -416,18 +419,11 @@ func (c *compilerContext) getPointerBitmap(typ llvm.Type, pos token.Pos) *big.In
 	}
 }

-// archFamily returns the archtecture from the LLVM triple but with some
+// archFamily returns the architecture from the LLVM triple but with some
 // architecture names ("armv6", "thumbv7m", etc) merged into a single
 // architecture name ("arm").
 func (c *compilerContext) archFamily() string {
-	arch := strings.Split(c.Triple, "-")[0]
-	if strings.HasPrefix(arch, "arm64") {
-		return "aarch64"
-	}
-	if strings.HasPrefix(arch, "arm") || strings.HasPrefix(arch, "thumb") {
-		return "arm"
-	}
-	return arch
+	return compileopts.CanonicalArchName(c.Triple)
 }

 // isThumb returns whether we're in ARM or in Thumb mode. It panics if the
@@ -207,7 +207,7 @@ func AppendToGlobal(mod llvm.Module, globalName string, values ...llvm.Value) {
 	used.SetLinkage(llvm.AppendingLinkage)
 }

-// Return the LLVM major version.
+// Version returns the LLVM major version.
 func Version() int {
 	majorStr := strings.Split(llvm.Version, ".")[0]
 	major, err := strconv.Atoi(majorStr)
@@ -326,7 +326,7 @@ func (b *builder) zeroUndefBytes(llvmType llvm.Type, ptr llvm.Value) error {
 			if i < numFields-1 {
 				nextOffset = b.targetData.ElementOffset(llvmStructType, i+1)
 			} else {
-				// Last field?  Next offset is the total size of the allcoate struct.
+				// Last field?  Next offset is the total size of the allocate struct.
 				nextOffset = b.targetData.TypeAllocSize(llvmStructType)
 			}

@@ -174,6 +174,7 @@ func (c *compilerContext) getFunction(fn *ssa.Function) (llvm.Type, llvm.Value)
 		// that the only thing we'll do is read the pointer.
 		llvmFn.AddAttributeAtIndex(1, c.ctx.CreateEnumAttribute(llvm.AttributeKindID("nocapture"), 0))
 		llvmFn.AddAttributeAtIndex(1, c.ctx.CreateEnumAttribute(llvm.AttributeKindID("readonly"), 0))
+		llvmFn.AddFunctionAttr(c.ctx.CreateEnumAttribute(llvm.AttributeKindID("nounwind"), 0))
 	case "__mulsi3", "__divmodsi4", "__udivmodsi4":
 		if strings.Split(c.Triple, "-")[0] == "avr" {
 			// These functions are compiler-rt/libgcc functions that are
@@ -346,7 +347,7 @@ func (c *compilerContext) parsePragmas(info *functionInfo, f *ssa.Function) {
 // The list of allowed types is based on this proposal:
 // https://github.com/golang/go/issues/59149
 func (c *compilerContext) checkWasmImport(f *ssa.Function, pragma string) {
-	if c.pkg.Path() == "runtime" || c.pkg.Path() == "syscall/js" {
+	if c.pkg.Path() == "runtime" || c.pkg.Path() == "syscall/js" || c.pkg.Path() == "syscall" {
 		// The runtime is a special case. Allow all kinds of parameters
 		// (importantly, including pointers).
 		return
@@ -360,38 +361,68 @@ func (c *compilerContext) checkWasmImport(f *ssa.Function, pragma string) {
 		c.addError(f.Signature.Results().At(1).Pos(), fmt.Sprintf("%s: too many return values", pragma))
 	} else if f.Signature.Results().Len() == 1 {
 		result := f.Signature.Results().At(0)
-		if !isValidWasmType(result.Type(), true) {
+		if !isValidWasmType(result.Type(), siteResult) {
 			c.addError(result.Pos(), fmt.Sprintf("%s: unsupported result type %s", pragma, result.Type().String()))
 		}
 	}
 	for _, param := range f.Params {
 		// Check whether the type is allowed.
 		// Only a very limited number of types can be mapped to WebAssembly.
-		if !isValidWasmType(param.Type(), false) {
+		if !isValidWasmType(param.Type(), siteParam) {
 			c.addError(param.Pos(), fmt.Sprintf("%s: unsupported parameter type %s", pragma, param.Type().String()))
 		}
 	}
 }

-// Check whether the type maps directly to a WebAssembly type, according to:
+// Check whether the type maps directly to a WebAssembly type.
+//
+// This reflects the relaxed type restrictions proposed here (except for structs.HostLayout):
+// https://github.com/golang/go/issues/66984
+//
+// This previously reflected the additional restrictions documented here:
 // https://github.com/golang/go/issues/59149
-func isValidWasmType(typ types.Type, isReturn bool) bool {
+func isValidWasmType(typ types.Type, site wasmSite) bool {
 	switch typ := typ.Underlying().(type) {
 	case *types.Basic:
 		switch typ.Kind() {
-		case types.Int32, types.Uint32, types.Int64, types.Uint64:
+		case types.Bool:
+			return true
+		case types.Int, types.Uint, types.Int8, types.Uint8, types.Int16, types.Uint16, types.Int32, types.Uint32, types.Int64, types.Uint64:
 			return true
 		case types.Float32, types.Float64:
 			return true
-		case types.UnsafePointer:
-			if !isReturn {
-				return true
+		case types.Uintptr, types.UnsafePointer:
+			return true
+		case types.String:
+			// string flattens to two values, so disallowed as a result
+			return site == siteParam || site == siteIndirect
+		}
+	case *types.Array:
+		return site == siteIndirect && isValidWasmType(typ.Elem(), siteIndirect)
+	case *types.Struct:
+		if site != siteIndirect {
+			return false
+		}
+		for i := 0; i < typ.NumFields(); i++ {
+			if !isValidWasmType(typ.Field(i).Type(), siteIndirect) {
+				return false
 			}
 		}
+		return true
+	case *types.Pointer:
+		return isValidWasmType(typ.Elem(), siteIndirect)
 	}
 	return false
 }

+type wasmSite int
+
+const (
+	siteParam wasmSite = iota
+	siteResult
+	siteIndirect // pointer or field
+)
+
 // getParams returns the function parameters, including the receiver at the
 // start. This is an alternative to the Params member of *ssa.Function, which is
 // not yet populated when the package has not yet been built.
@@ -440,7 +471,9 @@ func (c *compilerContext) addStandardDefinedAttributes(llvmFn llvm.Value) {
 	// This behavior matches Clang when compiling C source files.
 	// It reduces binary size on Linux a little bit on non-x86_64 targets by
 	// eliminating exception tables for these functions.
-	llvmFn.AddFunctionAttr(c.ctx.CreateEnumAttribute(llvm.AttributeKindID("nounwind"), 0))
+	if c.supportsRecover() != recoverWasmEH {
+		llvmFn.AddFunctionAttr(c.ctx.CreateEnumAttribute(llvm.AttributeKindID("nounwind"), 0))
+	}
 	if strings.Split(c.Triple, "-")[0] == "x86_64" {
 		// Required by the ABI.
 		// The uwtable has two possible values: sync (1) or async (2). We use
@@ -12,7 +12,8 @@ import (

 // createRawSyscall creates a system call with the provided system call number
 // and returns the result as a single integer (the system call result). The
-// result is not further interpreted.
+// result is not further interpreted (with the exception of MIPS to use the same
+// return value everywhere).
 func (b *builder) createRawSyscall(call *ssa.CallCommon) (llvm.Value, error) {
 	num := b.getValue(call.Args[0], getPos(call))
 	switch {
@@ -33,18 +34,17 @@ func (b *builder) createRawSyscall(call *ssa.CallCommon) (llvm.Value, error) {
 				"{r10}",
 				"{r8}",
 				"{r9}",
-				"{r11}",
-				"{r12}",
-				"{r13}",
 			}[i]
 			llvmValue := b.getValue(arg, getPos(call))
 			args = append(args, llvmValue)
 			argTypes = append(argTypes, llvmValue.Type())
 		}
+		// rcx and r11 are clobbered by the syscall, so make sure they are not used
 		constraints += ",~{rcx},~{r11}"
 		fnType := llvm.FunctionType(b.uintptrType, argTypes, false)
 		target := llvm.InlineAsm(fnType, "syscall", constraints, true, false, llvm.InlineAsmDialectIntel, false)
 		return b.CreateCall(fnType, target, args, ""), nil
+
 	case b.GOARCH == "386" && b.GOOS == "linux":
 		// Sources:
 		//   syscall(2) man page
@@ -71,6 +71,7 @@ func (b *builder) createRawSyscall(call *ssa.CallCommon) (llvm.Value, error) {
 		fnType := llvm.FunctionType(b.uintptrType, argTypes, false)
 		target := llvm.InlineAsm(fnType, "int 0x80", constraints, true, false, llvm.InlineAsmDialectIntel, false)
 		return b.CreateCall(fnType, target, args, ""), nil
+
 	case b.GOARCH == "arm" && b.GOOS == "linux":
 		// Implement the EABI system call convention for Linux.
 		// Source: syscall(2) man page.
@@ -103,6 +104,7 @@ func (b *builder) createRawSyscall(call *ssa.CallCommon) (llvm.Value, error) {
 		fnType := llvm.FunctionType(b.uintptrType, argTypes, false)
 		target := llvm.InlineAsm(fnType, "svc #0", constraints, true, false, 0, false)
 		return b.CreateCall(fnType, target, args, ""), nil
+
 	case b.GOARCH == "arm64" && b.GOOS == "linux":
 		// Source: syscall(2) man page.
 		args := []llvm.Value{}
@@ -135,6 +137,98 @@ func (b *builder) createRawSyscall(call *ssa.CallCommon) (llvm.Value, error) {
 		fnType := llvm.FunctionType(b.uintptrType, argTypes, false)
 		target := llvm.InlineAsm(fnType, "svc #0", constraints, true, false, 0, false)
 		return b.CreateCall(fnType, target, args, ""), nil
+
+	case (b.GOARCH == "mips" || b.GOARCH == "mipsle") && b.GOOS == "linux":
+		// Implement the system call convention for Linux.
+		// Source: syscall(2) man page and musl:
+		// https://git.musl-libc.org/cgit/musl/tree/arch/mips/syscall_arch.h
+		// Also useful:
+		// https://web.archive.org/web/20220529105937/https://www.linux-mips.org/wiki/Syscall
+		// The syscall number goes in r2, the result also in r2.
+		// Register r7 is both an input parameter and an output parameter: if it
+		// is non-zero, the system call failed and r2 is the error code.
+		// The code below implements the O32 syscall ABI, not the N32 ABI. It
+		// could implement both at the same time if needed (like what appears to
+		// be done in musl) by forcing arg5-arg7 into the right registers but
+		// letting the compiler decide the registers should result in _slightly_
+		// faster and smaller code.
+		args := []llvm.Value{num}
+		argTypes := []llvm.Type{b.uintptrType}
+		constraints := "={$2},={$7},0"
+		syscallParams := call.Args[1:]
+		if len(syscallParams) > 7 {
+			// There is one syscall that uses 7 parameters: sync_file_range.
+			// But only 7, not more. Go however only has Syscall6 and Syscall9.
+			// Therefore, we can ignore the remaining parameters.
+			syscallParams = syscallParams[:7]
+		}
+		for i, arg := range syscallParams {
+			constraints += "," + [...]string{
+				"{$4}", // arg1
+				"{$5}", // arg2
+				"{$6}", // arg3
+				"1",    // arg4, error return
+				"r",    // arg5 on the stack
+				"r",    // arg6 on the stack
+				"r",    // arg7 on the stack
+			}[i]
+			llvmValue := b.getValue(arg, getPos(call))
+			args = append(args, llvmValue)
+			argTypes = append(argTypes, llvmValue.Type())
+		}
+		// Create assembly code.
+		// Parameters beyond the first 4 are passed on the stack instead of in
+		// registers in the O32 syscall ABI.
+		// We need ".set noat" because LLVM might pick register $1 ($at) as the
+		// register for a parameter and apparently this is not allowed on MIPS
+		// unless you use this specific pragma.
+		asm := "syscall"
+		switch len(syscallParams) {
+		case 5:
+			asm = "" +
+				".set noat\n" +
+				"subu $$sp, $$sp, 32\n" +
+				"sw $7, 16($$sp)\n" + // arg5
+				"syscall\n" +
+				"addu $$sp, $$sp, 32\n" +
+				".set at\n"
+		case 6:
+			asm = "" +
+				".set noat\n" +
+				"subu $$sp, $$sp, 32\n" +
+				"sw $7, 16($$sp)\n" + // arg5
+				"sw $8, 20($$sp)\n" + // arg6
+				"syscall\n" +
+				"addu $$sp, $$sp, 32\n" +
+				".set at\n"
+		case 7:
+			asm = "" +
+				".set noat\n" +
+				"subu $$sp, $$sp, 32\n" +
+				"sw $7, 16($$sp)\n" + // arg5
+				"sw $8, 20($$sp)\n" + // arg6
+				"sw $9, 24($$sp)\n" + // arg7
+				"syscall\n" +
+				"addu $$sp, $$sp, 32\n" +
+				".set at\n"
+		}
+		constraints += ",~{$3},~{$4},~{$5},~{$6},~{$8},~{$9},~{$10},~{$11},~{$12},~{$13},~{$14},~{$15},~{$24},~{$25},~{hi},~{lo},~{memory}"
+		returnType := b.ctx.StructType([]llvm.Type{b.uintptrType, b.uintptrType}, false)
+		fnType := llvm.FunctionType(returnType, argTypes, false)
+		target := llvm.InlineAsm(fnType, asm, constraints, true, true, 0, false)
+		call := b.CreateCall(fnType, target, args, "")
+		resultCode := b.CreateExtractValue(call, 0, "") // r2
+		errorFlag := b.CreateExtractValue(call, 1, "")  // r7
+		// Pseudocode to return the result with the same convention as other
+		// archs:
+		//    return (errorFlag != 0) ? -resultCode : resultCode;
+		// At least on QEMU with the O32 ABI, the error code is always positive.
+		zero := llvm.ConstInt(b.uintptrType, 0, false)
+		isError := b.CreateICmp(llvm.IntNE, errorFlag, zero, "")
+		negativeResult := b.CreateSub(zero, resultCode, "")
+		result := b.CreateSelect(isError, negativeResult, resultCode, "")
+		return result, nil
+
 	default:
 		return llvm.Value{}, b.makeError(call.Pos(), "unknown GOOS/GOARCH for syscall: "+b.GOOS+"/"+b.GOARCH)
 	}
@@ -217,6 +311,7 @@ func (b *builder) createSyscall(call *ssa.CallCommon) (llvm.Value, error) {
 		retval = b.CreateInsertValue(retval, syscallResult, 0, "")
 		retval = b.CreateInsertValue(retval, errResult, 2, "")
 		return retval, nil
+
 	default:
 		return llvm.Value{}, b.makeError(call.Pos(), "unknown GOOS/GOARCH for syscall: "+b.GOOS+"/"+b.GOARCH)
 	}
@@ -13,30 +13,31 @@ target triple = "wasm32-unknown-wasi"
 ; Function Attrs: allockind("alloc,zeroed") allocsize(0)
 declare noalias nonnull ptr @runtime.alloc(i32, ptr, ptr) #0

+; Function Attrs: nounwind
 declare void @runtime.trackPointer(ptr nocapture readonly, ptr, ptr) #1

 ; Function Attrs: nounwind
-define hidden void @main.init(ptr %context) unnamed_addr #2 {
+define hidden void @main.init(ptr %context) unnamed_addr #1 {
 entry:
  ret void
 }

 ; Function Attrs: nounwind
-define hidden i32 @main.addInt(i32 %x, i32 %y, ptr %context) unnamed_addr #2 {
+define hidden i32 @main.addInt(i32 %x, i32 %y, ptr %context) unnamed_addr #1 {
 entry:
  %0 = add i32 %x, %y
  ret i32 %0
 }

 ; Function Attrs: nounwind
-define hidden i1 @main.equalInt(i32 %x, i32 %y, ptr %context) unnamed_addr #2 {
+define hidden i1 @main.equalInt(i32 %x, i32 %y, ptr %context) unnamed_addr #1 {
 entry:
  %0 = icmp eq i32 %x, %y
  ret i1 %0
 }

 ; Function Attrs: nounwind
-define hidden i32 @main.divInt(i32 %x, i32 %y, ptr %context) unnamed_addr #2 {
+define hidden i32 @main.divInt(i32 %x, i32 %y, ptr %context) unnamed_addr #1 {
 entry:
  %0 = icmp eq i32 %y, 0
  br i1 %0, label %divbyzero.throw, label %divbyzero.next
@@ -54,10 +55,10 @@ divbyzero.throw:                                  ; preds = %entry
  unreachable
 }

-declare void @runtime.divideByZeroPanic(ptr) #1
+declare void @runtime.divideByZeroPanic(ptr) #2

 ; Function Attrs: nounwind
-define hidden i32 @main.divUint(i32 %x, i32 %y, ptr %context) unnamed_addr #2 {
+define hidden i32 @main.divUint(i32 %x, i32 %y, ptr %context) unnamed_addr #1 {
 entry:
  %0 = icmp eq i32 %y, 0
  br i1 %0, label %divbyzero.throw, label %divbyzero.next
@@ -72,7 +73,7 @@ divbyzero.throw:                                  ; preds = %entry
 }

 ; Function Attrs: nounwind
-define hidden i32 @main.remInt(i32 %x, i32 %y, ptr %context) unnamed_addr #2 {
+define hidden i32 @main.remInt(i32 %x, i32 %y, ptr %context) unnamed_addr #1 {
 entry:
  %0 = icmp eq i32 %y, 0
  br i1 %0, label %divbyzero.throw, label %divbyzero.next
@@ -91,7 +92,7 @@ divbyzero.throw:                                  ; preds = %entry
 }

 ; Function Attrs: nounwind
-define hidden i32 @main.remUint(i32 %x, i32 %y, ptr %context) unnamed_addr #2 {
+define hidden i32 @main.remUint(i32 %x, i32 %y, ptr %context) unnamed_addr #1 {
 entry:
  %0 = icmp eq i32 %y, 0
  br i1 %0, label %divbyzero.throw, label %divbyzero.next
@@ -106,61 +107,61 @@ divbyzero.throw:                                  ; preds = %entry
 }

 ; Function Attrs: nounwind
-define hidden i1 @main.floatEQ(float %x, float %y, ptr %context) unnamed_addr #2 {
+define hidden i1 @main.floatEQ(float %x, float %y, ptr %context) unnamed_addr #1 {
 entry:
  %0 = fcmp oeq float %x, %y
  ret i1 %0
 }

 ; Function Attrs: nounwind
-define hidden i1 @main.floatNE(float %x, float %y, ptr %context) unnamed_addr #2 {
+define hidden i1 @main.floatNE(float %x, float %y, ptr %context) unnamed_addr #1 {
 entry:
  %0 = fcmp une float %x, %y
  ret i1 %0
 }

 ; Function Attrs: nounwind
-define hidden i1 @main.floatLower(float %x, float %y, ptr %context) unnamed_addr #2 {
+define hidden i1 @main.floatLower(float %x, float %y, ptr %context) unnamed_addr #1 {
 entry:
  %0 = fcmp olt float %x, %y
  ret i1 %0
 }

 ; Function Attrs: nounwind
-define hidden i1 @main.floatLowerEqual(float %x, float %y, ptr %context) unnamed_addr #2 {
+define hidden i1 @main.floatLowerEqual(float %x, float %y, ptr %context) unnamed_addr #1 {
 entry:
  %0 = fcmp ole float %x, %y
  ret i1 %0
 }

 ; Function Attrs: nounwind
-define hidden i1 @main.floatGreater(float %x, float %y, ptr %context) unnamed_addr #2 {
+define hidden i1 @main.floatGreater(float %x, float %y, ptr %context) unnamed_addr #1 {
 entry:
  %0 = fcmp ogt float %x, %y
  ret i1 %0
 }

 ; Function Attrs: nounwind
-define hidden i1 @main.floatGreaterEqual(float %x, float %y, ptr %context) unnamed_addr #2 {
+define hidden i1 @main.floatGreaterEqual(float %x, float %y, ptr %context) unnamed_addr #1 {
 entry:
  %0 = fcmp oge float %x, %y
  ret i1 %0
 }

 ; Function Attrs: nounwind
-define hidden float @main.complexReal(float %x.r, float %x.i, ptr %context) unnamed_addr #2 {
+define hidden float @main.complexReal(float %x.r, float %x.i, ptr %context) unnamed_addr #1 {
 entry:
  ret float %x.r
 }

 ; Function Attrs: nounwind
-define hidden float @main.complexImag(float %x.r, float %x.i, ptr %context) unnamed_addr #2 {
+define hidden float @main.complexImag(float %x.r, float %x.i, ptr %context) unnamed_addr #1 {
 entry:
  ret float %x.i
 }

 ; Function Attrs: nounwind
-define hidden { float, float } @main.complexAdd(float %x.r, float %x.i, float %y.r, float %y.i, ptr %context) unnamed_addr #2 {
+define hidden { float, float } @main.complexAdd(float %x.r, float %x.i, float %y.r, float %y.i, ptr %context) unnamed_addr #1 {
 entry:
  %0 = fadd float %x.r, %y.r
  %1 = fadd float %x.i, %y.i
@@ -170,7 +171,7 @@ entry:
 }

 ; Function Attrs: nounwind
-define hidden { float, float } @main.complexSub(float %x.r, float %x.i, float %y.r, float %y.i, ptr %context) unnamed_addr #2 {
+define hidden { float, float } @main.complexSub(float %x.r, float %x.i, float %y.r, float %y.i, ptr %context) unnamed_addr #1 {
 entry:
  %0 = fsub float %x.r, %y.r
  %1 = fsub float %x.i, %y.i
@@ -180,7 +181,7 @@ entry:
 }

 ; Function Attrs: nounwind
-define hidden { float, float } @main.complexMul(float %x.r, float %x.i, float %y.r, float %y.i, ptr %context) unnamed_addr #2 {
+define hidden { float, float } @main.complexMul(float %x.r, float %x.i, float %y.r, float %y.i, ptr %context) unnamed_addr #1 {
 entry:
  %0 = fmul float %x.r, %y.r
  %1 = fmul float %x.i, %y.i
@@ -194,19 +195,19 @@ entry:
 }

 ; Function Attrs: nounwind
-define hidden void @main.foo(ptr %context) unnamed_addr #2 {
+define hidden void @main.foo(ptr %context) unnamed_addr #1 {
 entry:
  call void @"main.foo$1"(%main.kv.0 zeroinitializer, ptr undef)
  ret void
 }

 ; Function Attrs: nounwind
-define internal void @"main.foo$1"(%main.kv.0 %b, ptr %context) unnamed_addr #2 {
+define internal void @"main.foo$1"(%main.kv.0 %b, ptr %context) unnamed_addr #1 {
 entry:
  ret void
 }

-attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
-attributes #1 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
-attributes #2 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
+attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
+attributes #1 = { nounwind "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
+attributes #2 = { "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
 attributes #3 = { nounwind }
@@ -9,16 +9,17 @@ target triple = "wasm32-unknown-wasi"
 ; Function Attrs: allockind("alloc,zeroed") allocsize(0)
 declare noalias nonnull ptr @runtime.alloc(i32, ptr, ptr) #0

+; Function Attrs: nounwind
 declare void @runtime.trackPointer(ptr nocapture readonly, ptr, ptr) #1

 ; Function Attrs: nounwind
-define hidden void @main.init(ptr %context) unnamed_addr #2 {
+define hidden void @main.init(ptr %context) unnamed_addr #1 {
 entry:
  ret void
 }

 ; Function Attrs: nounwind
-define hidden void @main.chanIntSend(ptr dereferenceable_or_null(32) %ch, ptr %context) unnamed_addr #2 {
+define hidden void @main.chanIntSend(ptr dereferenceable_or_null(32) %ch, ptr %context) unnamed_addr #1 {
 entry:
  %chan.blockedList = alloca %runtime.channelBlockedList, align 8
  %chan.value = alloca i32, align 4
@@ -32,15 +33,15 @@ entry:
 }

 ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
-declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #3
+declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

-declare void @runtime.chanSend(ptr dereferenceable_or_null(32), ptr, ptr dereferenceable_or_null(24), ptr) #1
+declare void @runtime.chanSend(ptr dereferenceable_or_null(32), ptr, ptr dereferenceable_or_null(24), ptr) #3

 ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
-declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #3
+declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2

 ; Function Attrs: nounwind
-define hidden void @main.chanIntRecv(ptr dereferenceable_or_null(32) %ch, ptr %context) unnamed_addr #2 {
+define hidden void @main.chanIntRecv(ptr dereferenceable_or_null(32) %ch, ptr %context) unnamed_addr #1 {
 entry:
  %chan.blockedList = alloca %runtime.channelBlockedList, align 8
  %chan.value = alloca i32, align 4
@@ -52,10 +53,10 @@ entry:
  ret void
 }

-declare i1 @runtime.chanRecv(ptr dereferenceable_or_null(32), ptr, ptr dereferenceable_or_null(24), ptr) #1
+declare i1 @runtime.chanRecv(ptr dereferenceable_or_null(32), ptr, ptr dereferenceable_or_null(24), ptr) #3

 ; Function Attrs: nounwind
-define hidden void @main.chanZeroSend(ptr dereferenceable_or_null(32) %ch, ptr %context) unnamed_addr #2 {
+define hidden void @main.chanZeroSend(ptr dereferenceable_or_null(32) %ch, ptr %context) unnamed_addr #1 {
 entry:
  %chan.blockedList = alloca %runtime.channelBlockedList, align 8
  call void @llvm.lifetime.start.p0(i64 24, ptr nonnull %chan.blockedList)
@@ -65,7 +66,7 @@ entry:
 }

 ; Function Attrs: nounwind
-define hidden void @main.chanZeroRecv(ptr dereferenceable_or_null(32) %ch, ptr %context) unnamed_addr #2 {
+define hidden void @main.chanZeroRecv(ptr dereferenceable_or_null(32) %ch, ptr %context) unnamed_addr #1 {
 entry:
  %chan.blockedList = alloca %runtime.channelBlockedList, align 8
  call void @llvm.lifetime.start.p0(i64 24, ptr nonnull %chan.blockedList)
@@ -75,7 +76,7 @@ entry:
 }

 ; Function Attrs: nounwind
-define hidden void @main.selectZeroRecv(ptr dereferenceable_or_null(32) %ch1, ptr dereferenceable_or_null(32) %ch2, ptr %context) unnamed_addr #2 {
+define hidden void @main.selectZeroRecv(ptr dereferenceable_or_null(32) %ch1, ptr dereferenceable_or_null(32) %ch2, ptr %context) unnamed_addr #1 {
 entry:
  %select.states.alloca = alloca [2 x %runtime.chanSelectState], align 8
  %select.send.value = alloca i32, align 4
@@ -105,10 +106,10 @@ select.body:                                      ; preds = %select.next
  br label %select.done
 }

-declare { i32, i1 } @runtime.tryChanSelect(ptr, ptr, i32, i32, ptr) #1
+declare { i32, i1 } @runtime.tryChanSelect(ptr, ptr, i32, i32, ptr) #3

-attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
-attributes #1 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
-attributes #2 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
-attributes #3 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
+attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
+attributes #1 = { nounwind "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
+attributes #2 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
+attributes #3 = { "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
 attributes #4 = { nounwind }
@@ -3,7 +3,7 @@ source_filename = "defer.go"
 target datalayout = "e-m:e-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64"
 target triple = "thumbv7m-unknown-unknown-eabi"

-%runtime.deferFrame = type { ptr, ptr, [0 x ptr], ptr, i1, %runtime._interface }
+%runtime.deferFrameInlineAsm = type { ptr, ptr, [0 x ptr], ptr, i1, %runtime._interface }
 %runtime._interface = type { ptr, ptr }
 %runtime._defer = type { i32, ptr }

@@ -24,9 +24,9 @@ entry:
  %defer.alloca = alloca { i32, ptr }, align 4
  %deferPtr = alloca ptr, align 4
  store ptr null, ptr %deferPtr, align 4
-  %deferframe.buf = alloca %runtime.deferFrame, align 4
+  %deferframe.buf = alloca %runtime.deferFrameInlineAsm, align 4
  %0 = call ptr @llvm.stacksave.p0()
-  call void @runtime.setupDeferFrame(ptr nonnull %deferframe.buf, ptr %0, ptr undef) #4
+  call void @runtime.setupDeferFrameInlineAsm(ptr nonnull %deferframe.buf, ptr %0, ptr undef) #4
  store i32 0, ptr %defer.alloca, align 4
  %defer.alloca.repack15 = getelementptr inbounds { i32, ptr }, ptr %defer.alloca, i32 0, i32 1
  store ptr null, ptr %defer.alloca.repack15, align 4
@@ -40,7 +40,7 @@ entry:
  br label %rundefers.block

 rundefers.after:                                  ; preds = %rundefers.end
-  call void @runtime.destroyDeferFrame(ptr nonnull %deferframe.buf, ptr undef) #4
+  call void @runtime.destroyDeferFrameInlineAsm(ptr nonnull %deferframe.buf, ptr undef) #4
  ret void

 rundefers.block:                                  ; preds = %1
@@ -76,7 +76,7 @@ rundefers.end:                                    ; preds = %rundefers.loophead
  br label %rundefers.after

 recover:                                          ; preds = %rundefers.end3
-  call void @runtime.destroyDeferFrame(ptr nonnull %deferframe.buf, ptr undef) #4
+  call void @runtime.destroyDeferFrameInlineAsm(ptr nonnull %deferframe.buf, ptr undef) #4
  ret void

 lpad:                                             ; preds = %rundefers.callback012, %rundefers.callback0, %entry
@@ -115,9 +115,9 @@ rundefers.end3:                                   ; preds = %rundefers.loophead6
 ; Function Attrs: nocallback nofree nosync nounwind willreturn
 declare ptr @llvm.stacksave.p0() #3

-declare void @runtime.setupDeferFrame(ptr dereferenceable_or_null(24), ptr, ptr) #2
+declare void @runtime.setupDeferFrameInlineAsm(ptr dereferenceable_or_null(24), ptr, ptr) #2

-declare void @runtime.destroyDeferFrame(ptr dereferenceable_or_null(24), ptr) #2
+declare void @runtime.destroyDeferFrameInlineAsm(ptr dereferenceable_or_null(24), ptr) #2

 ; Function Attrs: nounwind
 define internal void @"main.deferSimple$1"(ptr %context) unnamed_addr #1 {
@@ -135,9 +135,9 @@ entry:
  %defer.alloca = alloca { i32, ptr }, align 4
  %deferPtr = alloca ptr, align 4
  store ptr null, ptr %deferPtr, align 4
-  %deferframe.buf = alloca %runtime.deferFrame, align 4
+  %deferframe.buf = alloca %runtime.deferFrameInlineAsm, align 4
  %0 = call ptr @llvm.stacksave.p0()
-  call void @runtime.setupDeferFrame(ptr nonnull %deferframe.buf, ptr %0, ptr undef) #4
+  call void @runtime.setupDeferFrameInlineAsm(ptr nonnull %deferframe.buf, ptr %0, ptr undef) #4
  store i32 0, ptr %defer.alloca, align 4
  %defer.alloca.repack22 = getelementptr inbounds { i32, ptr }, ptr %defer.alloca, i32 0, i32 1
  store ptr null, ptr %defer.alloca.repack22, align 4
@@ -155,7 +155,7 @@ entry:
  br label %rundefers.block

 rundefers.after:                                  ; preds = %rundefers.end
-  call void @runtime.destroyDeferFrame(ptr nonnull %deferframe.buf, ptr undef) #4
+  call void @runtime.destroyDeferFrameInlineAsm(ptr nonnull %deferframe.buf, ptr undef) #4
  ret void

 rundefers.block:                                  ; preds = %1
@@ -201,7 +201,7 @@ rundefers.end:                                    ; preds = %rundefers.loophead
  br label %rundefers.after

 recover:                                          ; preds = %rundefers.end7
-  call void @runtime.destroyDeferFrame(ptr nonnull %deferframe.buf, ptr undef) #4
+  call void @runtime.destroyDeferFrameInlineAsm(ptr nonnull %deferframe.buf, ptr undef) #4
  ret void

 lpad:                                             ; preds = %rundefers.callback119, %rundefers.callback016, %rundefers.callback1, %rundefers.callback0, %entry
@@ -0,0 +1,273 @@
+; ModuleID = 'defer.go'
+source_filename = "defer.go"
+target datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-n32:64-S128-ni:1:10:20"
+target triple = "wasm32-unknown-wasi"
+
+%runtime.deferFrameWasmEH = type { ptr, i1, %runtime._interface }
+%runtime._interface = type { ptr, ptr }
+%runtime._defer = type { i32, ptr }
+
+; Function Attrs: allockind("alloc,zeroed") allocsize(0)
+declare noalias nonnull ptr @runtime.alloc(i32, ptr, ptr) #0
+
+; Function Attrs: nounwind
+declare void @runtime.trackPointer(ptr nocapture readonly, ptr, ptr) #1
+
+define hidden void @main.init(ptr %context) unnamed_addr #2 {
+entry:
+  ret void
+}
+
+declare void @main.external(ptr) #2
+
+define hidden void @main.deferSimple(ptr %context) unnamed_addr #2 personality ptr @__gxx_wasm_personality_v0 {
+entry:
+  %defer.alloca = alloca { i32, ptr }, align 8
+  %deferPtr = alloca ptr, align 4
+  store ptr null, ptr %deferPtr, align 4
+  %deferframe.buf = alloca %runtime.deferFrameWasmEH, align 8
+  call void @runtime.setupDeferFrameWasmEH(ptr nonnull %deferframe.buf, ptr undef)
+  %stackalloc = alloca i8, align 1
+  call void @runtime.trackPointer(ptr nonnull %defer.alloca, ptr nonnull %stackalloc, ptr undef)
+  store i32 0, ptr %defer.alloca, align 4
+  %defer.alloca.repack13 = getelementptr inbounds { i32, ptr }, ptr %defer.alloca, i32 0, i32 1
+  store ptr null, ptr %defer.alloca.repack13, align 4
+  store ptr %defer.alloca, ptr %deferPtr, align 4
+  invoke void @main.external(ptr undef)
+          to label %invoke.cont unwind label %catch.dispatch
+
+invoke.cont:                                      ; preds = %entry
+  br label %rundefers.block
+
+rundefers.after:                                  ; preds = %rundefers.end
+  call void @runtime.destroyDeferFrameWasmEH(ptr nonnull %deferframe.buf, ptr undef)
+  ret void
+
+rundefers.block:                                  ; preds = %invoke.cont
+  br label %rundefers.loophead
+
+rundefers.loophead:                               ; preds = %rundefers.catch.start, %rundefers.callback0, %rundefers.block
+  %0 = load ptr, ptr %deferPtr, align 4
+  %stackIsNil = icmp eq ptr %0, null
+  br i1 %stackIsNil, label %rundefers.end, label %rundefers.loop
+
+rundefers.loop:                                   ; preds = %rundefers.loophead
+  %stack.next.gep = getelementptr inbounds %runtime._defer, ptr %0, i32 0, i32 1
+  %stack.next = load ptr, ptr %stack.next.gep, align 4
+  store ptr %stack.next, ptr %deferPtr, align 4
+  %callback = load i32, ptr %0, align 4
+  switch i32 %callback, label %rundefers.default [
+    i32 0, label %rundefers.callback0
+  ]
+
+rundefers.callback0:                              ; preds = %rundefers.loop
+  invoke void @"main.deferSimple$1"(ptr undef)
+          to label %rundefers.loophead unwind label %rundefers.catch.dispatch
+
+rundefers.default:                                ; preds = %rundefers.loop
+  unreachable
+
+rundefers.catch.dispatch:                         ; preds = %rundefers.callback0
+  %1 = catchswitch within none [label %rundefers.catch.start] unwind to caller
+
+rundefers.catch.start:                            ; preds = %rundefers.catch.dispatch
+  %2 = catchpad within %1 [ptr null]
+  catchret from %2 to label %rundefers.loophead
+
+rundefers.end:                                    ; preds = %rundefers.loophead
+  br label %rundefers.after
+
+recover:                                          ; preds = %rundefers.end1
+  call void @runtime.destroyDeferFrameWasmEH(ptr nonnull %deferframe.buf, ptr undef)
+  ret void
+
+catch.dispatch:                                   ; preds = %entry
+  %3 = catchswitch within none [label %catch.start] unwind to caller
+
+catch.start:                                      ; preds = %catch.dispatch
+  %4 = catchpad within %3 [ptr null]
+  catchret from %4 to label %rundefers
+
+rundefers:                                        ; preds = %catch.start
+  br label %rundefers.loophead4
+
+rundefers.loophead4:                              ; preds = %rundefers.catch.start6, %rundefers.callback012, %rundefers
+  %5 = load ptr, ptr %deferPtr, align 4
+  %stackIsNil7 = icmp eq ptr %5, null
+  br i1 %stackIsNil7, label %rundefers.end1, label %rundefers.loop3
+
+rundefers.loop3:                                  ; preds = %rundefers.loophead4
+  %stack.next.gep8 = getelementptr inbounds %runtime._defer, ptr %5, i32 0, i32 1
+  %stack.next9 = load ptr, ptr %stack.next.gep8, align 4
+  store ptr %stack.next9, ptr %deferPtr, align 4
+  %callback11 = load i32, ptr %5, align 4
+  switch i32 %callback11, label %rundefers.default2 [
+    i32 0, label %rundefers.callback012
+  ]
+
+rundefers.callback012:                            ; preds = %rundefers.loop3
+  invoke void @"main.deferSimple$1"(ptr undef)
+          to label %rundefers.loophead4 unwind label %rundefers.catch.dispatch5
+
+rundefers.default2:                               ; preds = %rundefers.loop3
+  unreachable
+
+rundefers.catch.dispatch5:                        ; preds = %rundefers.callback012
+  %6 = catchswitch within none [label %rundefers.catch.start6] unwind to caller
+
+rundefers.catch.start6:                           ; preds = %rundefers.catch.dispatch5
+  %7 = catchpad within %6 [ptr null]
+  catchret from %7 to label %rundefers.loophead4
+
+rundefers.end1:                                   ; preds = %rundefers.loophead4
+  br label %recover
+}
+
+declare i32 @__gxx_wasm_personality_v0(...)
+
+declare void @runtime.setupDeferFrameWasmEH(ptr dereferenceable_or_null(16), ptr) #2
+
+declare void @runtime.destroyDeferFrameWasmEH(ptr dereferenceable_or_null(16), ptr) #2
+
+define internal void @"main.deferSimple$1"(ptr %context) unnamed_addr #2 {
+entry:
+  call void @runtime.printint32(i32 3, ptr undef)
+  ret void
+}
+
+declare void @runtime.printint32(i32, ptr) #2
+
+define hidden void @main.deferMultiple(ptr %context) unnamed_addr #2 personality ptr @__gxx_wasm_personality_v0 {
+entry:
+  %defer.alloca2 = alloca { i32, ptr }, align 8
+  %defer.alloca = alloca { i32, ptr }, align 8
+  %deferPtr = alloca ptr, align 4
+  store ptr null, ptr %deferPtr, align 4
+  %deferframe.buf = alloca %runtime.deferFrameWasmEH, align 8
+  call void @runtime.setupDeferFrameWasmEH(ptr nonnull %deferframe.buf, ptr undef)
+  %stackalloc = alloca i8, align 1
+  call void @runtime.trackPointer(ptr nonnull %defer.alloca, ptr nonnull %stackalloc, ptr undef)
+  store i32 0, ptr %defer.alloca, align 4
+  %defer.alloca.repack16 = getelementptr inbounds { i32, ptr }, ptr %defer.alloca, i32 0, i32 1
+  store ptr null, ptr %defer.alloca.repack16, align 4
+  store ptr %defer.alloca, ptr %deferPtr, align 4
+  call void @runtime.trackPointer(ptr nonnull %defer.alloca2, ptr nonnull %stackalloc, ptr undef)
+  store i32 1, ptr %defer.alloca2, align 4
+  %defer.alloca2.repack17 = getelementptr inbounds { i32, ptr }, ptr %defer.alloca2, i32 0, i32 1
+  store ptr %defer.alloca, ptr %defer.alloca2.repack17, align 4
+  store ptr %defer.alloca2, ptr %deferPtr, align 4
+  invoke void @main.external(ptr undef)
+          to label %invoke.cont unwind label %catch.dispatch
+
+invoke.cont:                                      ; preds = %entry
+  br label %rundefers.block
+
+rundefers.after:                                  ; preds = %rundefers.end
+  call void @runtime.destroyDeferFrameWasmEH(ptr nonnull %deferframe.buf, ptr undef)
+  ret void
+
+rundefers.block:                                  ; preds = %invoke.cont
+  br label %rundefers.loophead
+
+rundefers.loophead:                               ; preds = %rundefers.catch.start, %rundefers.callback1, %rundefers.callback0, %rundefers.block
+  %0 = load ptr, ptr %deferPtr, align 4
+  %stackIsNil = icmp eq ptr %0, null
+  br i1 %stackIsNil, label %rundefers.end, label %rundefers.loop
+
+rundefers.loop:                                   ; preds = %rundefers.loophead
+  %stack.next.gep = getelementptr inbounds %runtime._defer, ptr %0, i32 0, i32 1
+  %stack.next = load ptr, ptr %stack.next.gep, align 4
+  store ptr %stack.next, ptr %deferPtr, align 4
+  %callback = load i32, ptr %0, align 4
+  switch i32 %callback, label %rundefers.default [
+    i32 0, label %rundefers.callback0
+    i32 1, label %rundefers.callback1
+  ]
+
+rundefers.callback0:                              ; preds = %rundefers.loop
+  invoke void @"main.deferMultiple$1"(ptr undef)
+          to label %rundefers.loophead unwind label %rundefers.catch.dispatch
+
+rundefers.callback1:                              ; preds = %rundefers.loop
+  invoke void @"main.deferMultiple$2"(ptr undef)
+          to label %rundefers.loophead unwind label %rundefers.catch.dispatch
+
+rundefers.default:                                ; preds = %rundefers.loop
+  unreachable
+
+rundefers.catch.dispatch:                         ; preds = %rundefers.callback1, %rundefers.callback0
+  %1 = catchswitch within none [label %rundefers.catch.start] unwind to caller
+
+rundefers.catch.start:                            ; preds = %rundefers.catch.dispatch
+  %2 = catchpad within %1 [ptr null]
+  catchret from %2 to label %rundefers.loophead
+
+rundefers.end:                                    ; preds = %rundefers.loophead
+  br label %rundefers.after
+
+recover:                                          ; preds = %rundefers.end3
+  call void @runtime.destroyDeferFrameWasmEH(ptr nonnull %deferframe.buf, ptr undef)
+  ret void
+
+catch.dispatch:                                   ; preds = %entry
+  %3 = catchswitch within none [label %catch.start] unwind to caller
+
+catch.start:                                      ; preds = %catch.dispatch
+  %4 = catchpad within %3 [ptr null]
+  catchret from %4 to label %rundefers
+
+rundefers:                                        ; preds = %catch.start
+  br label %rundefers.loophead6
+
+rundefers.loophead6:                              ; preds = %rundefers.catch.start8, %rundefers.callback115, %rundefers.callback014, %rundefers
+  %5 = load ptr, ptr %deferPtr, align 4
+  %stackIsNil9 = icmp eq ptr %5, null
+  br i1 %stackIsNil9, label %rundefers.end3, label %rundefers.loop5
+
+rundefers.loop5:                                  ; preds = %rundefers.loophead6
+  %stack.next.gep10 = getelementptr inbounds %runtime._defer, ptr %5, i32 0, i32 1
+  %stack.next11 = load ptr, ptr %stack.next.gep10, align 4
+  store ptr %stack.next11, ptr %deferPtr, align 4
+  %callback13 = load i32, ptr %5, align 4
+  switch i32 %callback13, label %rundefers.default4 [
+    i32 0, label %rundefers.callback014
+    i32 1, label %rundefers.callback115
+  ]
+
+rundefers.callback014:                            ; preds = %rundefers.loop5
+  invoke void @"main.deferMultiple$1"(ptr undef)
+          to label %rundefers.loophead6 unwind label %rundefers.catch.dispatch7
+
+rundefers.callback115:                            ; preds = %rundefers.loop5
+  invoke void @"main.deferMultiple$2"(ptr undef)
+          to label %rundefers.loophead6 unwind label %rundefers.catch.dispatch7
+
+rundefers.default4:                               ; preds = %rundefers.loop5
+  unreachable
+
+rundefers.catch.dispatch7:                        ; preds = %rundefers.callback115, %rundefers.callback014
+  %6 = catchswitch within none [label %rundefers.catch.start8] unwind to caller
+
+rundefers.catch.start8:                           ; preds = %rundefers.catch.dispatch7
+  %7 = catchpad within %6 [ptr null]
+  catchret from %7 to label %rundefers.loophead6
+
+rundefers.end3:                                   ; preds = %rundefers.loophead6
+  br label %recover
+}
+
+define internal void @"main.deferMultiple$1"(ptr %context) unnamed_addr #2 {
+entry:
+  call void @runtime.printint32(i32 3, ptr undef)
+  ret void
+}
+
+define internal void @"main.deferMultiple$2"(ptr %context) unnamed_addr #2 {
+entry:
+  call void @runtime.printint32(i32 5, ptr undef)
+  ret void
+}
+
+attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
+attributes #1 = { nounwind "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
+attributes #2 = { "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
@@ -13,31 +13,65 @@ func implementation() {

 type Uint uint32

-//go:wasmimport modulename validparam
-func validparam(a int32, b uint64, c float64, d unsafe.Pointer, e Uint)
+type S struct {
+	a [4]uint32
+	b uintptr
+	c int
+	d float32
+	e float64
+}

-// ERROR: //go:wasmimport modulename invalidparam: unsupported parameter type int
-// ERROR: //go:wasmimport modulename invalidparam: unsupported parameter type string
+//go:wasmimport modulename validparam
+func validparam(a int32, b uint64, c float64, d unsafe.Pointer, e Uint, f uintptr, g string, h *int32, i *S)
+
+// ERROR: //go:wasmimport modulename invalidparam: unsupported parameter type [4]uint32
 // ERROR: //go:wasmimport modulename invalidparam: unsupported parameter type []byte
-// ERROR: //go:wasmimport modulename invalidparam: unsupported parameter type *int32
+// ERROR: //go:wasmimport modulename invalidparam: unsupported parameter type struct{a int}
+// ERROR: //go:wasmimport modulename invalidparam: unsupported parameter type chan struct{}
+// ERROR: //go:wasmimport modulename invalidparam: unsupported parameter type func()
 //
 //go:wasmimport modulename invalidparam
-func invalidparam(a int, b string, c []byte, d *int32)
+func invalidparam(a [4]uint32, b []byte, c struct{ a int }, d chan struct{}, e func())

-//go:wasmimport modulename validreturn
-func validreturn() int32
+//go:wasmimport modulename validreturn_int32
+func validreturn_int32() int32
+
+//go:wasmimport modulename validreturn_int
+func validreturn_int() int
+
+//go:wasmimport modulename validreturn_ptr_int32
+func validreturn_ptr_int32() *int32
+
+//go:wasmimport modulename validreturn_ptr_string
+func validreturn_ptr_string() *string
+
+//go:wasmimport modulename validreturn_ptr_struct
+func validreturn_ptr_struct() *S
+
+//go:wasmimport modulename validreturn_unsafe_pointer
+func validreturn_unsafe_pointer() unsafe.Pointer

 // ERROR: //go:wasmimport modulename manyreturns: too many return values
 //
 //go:wasmimport modulename manyreturns
 func manyreturns() (int32, int32)

-// ERROR: //go:wasmimport modulename invalidreturn: unsupported result type int
+// ERROR: //go:wasmimport modulename invalidreturn_func: unsupported result type func()
 //
-//go:wasmimport modulename invalidreturn
-func invalidreturn() int
+//go:wasmimport modulename invalidreturn_func
+func invalidreturn_func() func()

-// ERROR: //go:wasmimport modulename invalidUnsafePointerReturn: unsupported result type unsafe.Pointer
+// ERROR: //go:wasmimport modulename invalidreturn_slice_byte: unsupported result type []byte
 //
-//go:wasmimport modulename invalidUnsafePointerReturn
-func invalidUnsafePointerReturn() unsafe.Pointer
+//go:wasmimport modulename invalidreturn_slice_byte
+func invalidreturn_slice_byte() []byte
+
+// ERROR: //go:wasmimport modulename invalidreturn_chan_int: unsupported result type chan int
+//
+//go:wasmimport modulename invalidreturn_chan_int
+func invalidreturn_chan_int() chan int
+
+// ERROR: //go:wasmimport modulename invalidreturn_string: unsupported result type string
+//
+//go:wasmimport modulename invalidreturn_string
+func invalidreturn_string() string
@@ -6,16 +6,17 @@ target triple = "wasm32-unknown-wasi"
 ; Function Attrs: allockind("alloc,zeroed") allocsize(0)
 declare noalias nonnull ptr @runtime.alloc(i32, ptr, ptr) #0

+; Function Attrs: nounwind
 declare void @runtime.trackPointer(ptr nocapture readonly, ptr, ptr) #1

 ; Function Attrs: nounwind
-define hidden void @main.init(ptr %context) unnamed_addr #2 {
+define hidden void @main.init(ptr %context) unnamed_addr #1 {
 entry:
  ret void
 }

 ; Function Attrs: nounwind
-define hidden i32 @main.f32tou32(float %v, ptr %context) unnamed_addr #2 {
+define hidden i32 @main.f32tou32(float %v, ptr %context) unnamed_addr #1 {
 entry:
  %positive = fcmp oge float %v, 0.000000e+00
  %withinmax = fcmp ole float %v, 0x41EFFFFFC0000000
@@ -27,25 +28,25 @@ entry:
 }

 ; Function Attrs: nounwind
-define hidden float @main.maxu32f(ptr %context) unnamed_addr #2 {
+define hidden float @main.maxu32f(ptr %context) unnamed_addr #1 {
 entry:
  ret float 0x41F0000000000000
 }

 ; Function Attrs: nounwind
-define hidden i32 @main.maxu32tof32(ptr %context) unnamed_addr #2 {
+define hidden i32 @main.maxu32tof32(ptr %context) unnamed_addr #1 {
 entry:
  ret i32 -1
 }

 ; Function Attrs: nounwind
-define hidden { i32, i32, i32, i32 } @main.inftoi32(ptr %context) unnamed_addr #2 {
+define hidden { i32, i32, i32, i32 } @main.inftoi32(ptr %context) unnamed_addr #1 {
 entry:
  ret { i32, i32, i32, i32 } { i32 -1, i32 0, i32 2147483647, i32 -2147483648 }
 }

 ; Function Attrs: nounwind
-define hidden i32 @main.u32tof32tou32(i32 %v, ptr %context) unnamed_addr #2 {
+define hidden i32 @main.u32tof32tou32(i32 %v, ptr %context) unnamed_addr #1 {
 entry:
  %0 = uitofp i32 %v to float
  %withinmax = fcmp ole float %0, 0x41EFFFFFC0000000
@@ -55,7 +56,7 @@ entry:
 }

 ; Function Attrs: nounwind
-define hidden float @main.f32tou32tof32(float %v, ptr %context) unnamed_addr #2 {
+define hidden float @main.f32tou32tof32(float %v, ptr %context) unnamed_addr #1 {
 entry:
  %positive = fcmp oge float %v, 0.000000e+00
  %withinmax = fcmp ole float %v, 0x41EFFFFFC0000000
@@ -68,7 +69,7 @@ entry:
 }

 ; Function Attrs: nounwind
-define hidden i8 @main.f32tou8(float %v, ptr %context) unnamed_addr #2 {
+define hidden i8 @main.f32tou8(float %v, ptr %context) unnamed_addr #1 {
 entry:
  %positive = fcmp oge float %v, 0.000000e+00
  %withinmax = fcmp ole float %v, 2.550000e+02
@@ -80,7 +81,7 @@ entry:
 }

 ; Function Attrs: nounwind
-define hidden i8 @main.f32toi8(float %v, ptr %context) unnamed_addr #2 {
+define hidden i8 @main.f32toi8(float %v, ptr %context) unnamed_addr #1 {
 entry:
  %abovemin = fcmp oge float %v, -1.280000e+02
  %belowmax = fcmp ole float %v, 1.270000e+02
@@ -93,6 +94,5 @@ entry:
  ret i8 %0
 }

-attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
-attributes #1 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
-attributes #2 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
+attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
+attributes #1 = { nounwind "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
@@ -6,16 +6,17 @@ target triple = "wasm32-unknown-wasi"
 ; Function Attrs: allockind("alloc,zeroed") allocsize(0)
 declare noalias nonnull ptr @runtime.alloc(i32, ptr, ptr) #0

+; Function Attrs: nounwind
 declare void @runtime.trackPointer(ptr nocapture readonly, ptr, ptr) #1

 ; Function Attrs: nounwind
-define hidden void @main.init(ptr %context) unnamed_addr #2 {
+define hidden void @main.init(ptr %context) unnamed_addr #1 {
 entry:
  ret void
 }

 ; Function Attrs: nounwind
-define hidden void @main.foo(ptr %callback.context, ptr %callback.funcptr, ptr %context) unnamed_addr #2 {
+define hidden void @main.foo(ptr %callback.context, ptr %callback.funcptr, ptr %context) unnamed_addr #1 {
 entry:
  %0 = icmp eq ptr %callback.funcptr, null
  br i1 %0, label %fpcall.throw, label %fpcall.next
@@ -29,22 +30,22 @@ fpcall.throw:                                     ; preds = %entry
  unreachable
 }

-declare void @runtime.nilPanic(ptr) #1
+declare void @runtime.nilPanic(ptr) #2

 ; Function Attrs: nounwind
-define hidden void @main.bar(ptr %context) unnamed_addr #2 {
+define hidden void @main.bar(ptr %context) unnamed_addr #1 {
 entry:
  call void @main.foo(ptr undef, ptr nonnull @main.someFunc, ptr undef)
  ret void
 }

 ; Function Attrs: nounwind
-define hidden void @main.someFunc(i32 %arg0, ptr %context) unnamed_addr #2 {
+define hidden void @main.someFunc(i32 %arg0, ptr %context) unnamed_addr #1 {
 entry:
  ret void
 }

-attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
-attributes #1 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
-attributes #2 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
+attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
+attributes #1 = { nounwind "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
+attributes #2 = { "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
 attributes #3 = { nounwind }
@@ -27,93 +27,94 @@ target triple = "wasm32-unknown-wasi"
 ; Function Attrs: allockind("alloc,zeroed") allocsize(0)
 declare noalias nonnull ptr @runtime.alloc(i32, ptr, ptr) #0

+; Function Attrs: nounwind
 declare void @runtime.trackPointer(ptr nocapture readonly, ptr, ptr) #1

 ; Function Attrs: nounwind
-define hidden void @main.init(ptr %context) unnamed_addr #2 {
+define hidden void @main.init(ptr %context) unnamed_addr #1 {
 entry:
  ret void
 }

 ; Function Attrs: nounwind
-define hidden void @main.newScalar(ptr %context) unnamed_addr #2 {
+define hidden void @main.newScalar(ptr %context) unnamed_addr #1 {
 entry:
  %stackalloc = alloca i8, align 1
-  %new = call dereferenceable(1) ptr @runtime.alloc(i32 1, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #3
-  call void @runtime.trackPointer(ptr nonnull %new, ptr nonnull %stackalloc, ptr undef) #3
+  %new = call align 1 dereferenceable(1) ptr @runtime.alloc(i32 1, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #2
+  call void @runtime.trackPointer(ptr nonnull %new, ptr nonnull %stackalloc, ptr undef)
  store ptr %new, ptr @main.scalar1, align 4
-  %new1 = call dereferenceable(4) ptr @runtime.alloc(i32 4, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #3
-  call void @runtime.trackPointer(ptr nonnull %new1, ptr nonnull %stackalloc, ptr undef) #3
+  %new1 = call align 4 dereferenceable(4) ptr @runtime.alloc(i32 4, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #2
+  call void @runtime.trackPointer(ptr nonnull %new1, ptr nonnull %stackalloc, ptr undef)
  store ptr %new1, ptr @main.scalar2, align 4
-  %new2 = call dereferenceable(8) ptr @runtime.alloc(i32 8, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #3
-  call void @runtime.trackPointer(ptr nonnull %new2, ptr nonnull %stackalloc, ptr undef) #3
+  %new2 = call align 8 dereferenceable(8) ptr @runtime.alloc(i32 8, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #2
+  call void @runtime.trackPointer(ptr nonnull %new2, ptr nonnull %stackalloc, ptr undef)
  store ptr %new2, ptr @main.scalar3, align 4
-  %new3 = call dereferenceable(4) ptr @runtime.alloc(i32 4, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #3
-  call void @runtime.trackPointer(ptr nonnull %new3, ptr nonnull %stackalloc, ptr undef) #3
+  %new3 = call align 4 dereferenceable(4) ptr @runtime.alloc(i32 4, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #2
+  call void @runtime.trackPointer(ptr nonnull %new3, ptr nonnull %stackalloc, ptr undef)
  store ptr %new3, ptr @main.scalar4, align 4
  ret void
 }

 ; Function Attrs: nounwind
-define hidden void @main.newArray(ptr %context) unnamed_addr #2 {
+define hidden void @main.newArray(ptr %context) unnamed_addr #1 {
 entry:
  %stackalloc = alloca i8, align 1
-  %new = call dereferenceable(3) ptr @runtime.alloc(i32 3, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #3
-  call void @runtime.trackPointer(ptr nonnull %new, ptr nonnull %stackalloc, ptr undef) #3
+  %new = call align 1 dereferenceable(3) ptr @runtime.alloc(i32 3, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #2
+  call void @runtime.trackPointer(ptr nonnull %new, ptr nonnull %stackalloc, ptr undef)
  store ptr %new, ptr @main.array1, align 4
-  %new1 = call dereferenceable(71) ptr @runtime.alloc(i32 71, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #3
-  call void @runtime.trackPointer(ptr nonnull %new1, ptr nonnull %stackalloc, ptr undef) #3
+  %new1 = call align 1 dereferenceable(71) ptr @runtime.alloc(i32 71, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #2
+  call void @runtime.trackPointer(ptr nonnull %new1, ptr nonnull %stackalloc, ptr undef)
  store ptr %new1, ptr @main.array2, align 4
-  %new2 = call dereferenceable(12) ptr @runtime.alloc(i32 12, ptr nonnull inttoptr (i32 67 to ptr), ptr undef) #3
-  call void @runtime.trackPointer(ptr nonnull %new2, ptr nonnull %stackalloc, ptr undef) #3
+  %new2 = call align 4 dereferenceable(12) ptr @runtime.alloc(i32 12, ptr nonnull inttoptr (i32 67 to ptr), ptr undef) #2
+  call void @runtime.trackPointer(ptr nonnull %new2, ptr nonnull %stackalloc, ptr undef)
  store ptr %new2, ptr @main.array3, align 4
  ret void
 }

 ; Function Attrs: nounwind
-define hidden void @main.newStruct(ptr %context) unnamed_addr #2 {
+define hidden void @main.newStruct(ptr %context) unnamed_addr #1 {
 entry:
  %stackalloc = alloca i8, align 1
-  %new = call ptr @runtime.alloc(i32 0, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #3
-  call void @runtime.trackPointer(ptr nonnull %new, ptr nonnull %stackalloc, ptr undef) #3
+  %new = call align 1 ptr @runtime.alloc(i32 0, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #2
+  call void @runtime.trackPointer(ptr nonnull %new, ptr nonnull %stackalloc, ptr undef)
  store ptr %new, ptr @main.struct1, align 4
-  %new1 = call dereferenceable(8) ptr @runtime.alloc(i32 8, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #3
-  call void @runtime.trackPointer(ptr nonnull %new1, ptr nonnull %stackalloc, ptr undef) #3
+  %new1 = call align 4 dereferenceable(8) ptr @runtime.alloc(i32 8, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #2
+  call void @runtime.trackPointer(ptr nonnull %new1, ptr nonnull %stackalloc, ptr undef)
  store ptr %new1, ptr @main.struct2, align 4
-  %new2 = call dereferenceable(248) ptr @runtime.alloc(i32 248, ptr nonnull @"runtime/gc.layout:62-2000000000000001", ptr undef) #3
-  call void @runtime.trackPointer(ptr nonnull %new2, ptr nonnull %stackalloc, ptr undef) #3
+  %new2 = call align 4 dereferenceable(248) ptr @runtime.alloc(i32 248, ptr nonnull @"runtime/gc.layout:62-2000000000000001", ptr undef) #2
+  call void @runtime.trackPointer(ptr nonnull %new2, ptr nonnull %stackalloc, ptr undef)
  store ptr %new2, ptr @main.struct3, align 4
-  %new3 = call dereferenceable(248) ptr @runtime.alloc(i32 248, ptr nonnull @"runtime/gc.layout:62-0001", ptr undef) #3
-  call void @runtime.trackPointer(ptr nonnull %new3, ptr nonnull %stackalloc, ptr undef) #3
+  %new3 = call align 4 dereferenceable(248) ptr @runtime.alloc(i32 248, ptr nonnull @"runtime/gc.layout:62-0001", ptr undef) #2
+  call void @runtime.trackPointer(ptr nonnull %new3, ptr nonnull %stackalloc, ptr undef)
  store ptr %new3, ptr @main.struct4, align 4
  ret void
 }

 ; Function Attrs: nounwind
-define hidden ptr @main.newFuncValue(ptr %context) unnamed_addr #2 {
+define hidden ptr @main.newFuncValue(ptr %context) unnamed_addr #1 {
 entry:
  %stackalloc = alloca i8, align 1
-  %new = call dereferenceable(8) ptr @runtime.alloc(i32 8, ptr nonnull inttoptr (i32 197 to ptr), ptr undef) #3
-  call void @runtime.trackPointer(ptr nonnull %new, ptr nonnull %stackalloc, ptr undef) #3
+  %new = call align 4 dereferenceable(8) ptr @runtime.alloc(i32 8, ptr nonnull inttoptr (i32 197 to ptr), ptr undef) #2
+  call void @runtime.trackPointer(ptr nonnull %new, ptr nonnull %stackalloc, ptr undef)
  ret ptr %new
 }

 ; Function Attrs: nounwind
-define hidden void @main.makeSlice(ptr %context) unnamed_addr #2 {
+define hidden void @main.makeSlice(ptr %context) unnamed_addr #1 {
 entry:
  %stackalloc = alloca i8, align 1
-  %makeslice = call dereferenceable(5) ptr @runtime.alloc(i32 5, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #3
-  call void @runtime.trackPointer(ptr nonnull %makeslice, ptr nonnull %stackalloc, ptr undef) #3
+  %makeslice = call align 1 dereferenceable(5) ptr @runtime.alloc(i32 5, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #2
+  call void @runtime.trackPointer(ptr nonnull %makeslice, ptr nonnull %stackalloc, ptr undef)
  store ptr %makeslice, ptr @main.slice1, align 4
  store i32 5, ptr getelementptr inbounds ({ ptr, i32, i32 }, ptr @main.slice1, i32 0, i32 1), align 4
  store i32 5, ptr getelementptr inbounds ({ ptr, i32, i32 }, ptr @main.slice1, i32 0, i32 2), align 4
-  %makeslice1 = call dereferenceable(20) ptr @runtime.alloc(i32 20, ptr nonnull inttoptr (i32 67 to ptr), ptr undef) #3
-  call void @runtime.trackPointer(ptr nonnull %makeslice1, ptr nonnull %stackalloc, ptr undef) #3
+  %makeslice1 = call align 4 dereferenceable(20) ptr @runtime.alloc(i32 20, ptr nonnull inttoptr (i32 67 to ptr), ptr undef) #2
+  call void @runtime.trackPointer(ptr nonnull %makeslice1, ptr nonnull %stackalloc, ptr undef)
  store ptr %makeslice1, ptr @main.slice2, align 4
  store i32 5, ptr getelementptr inbounds ({ ptr, i32, i32 }, ptr @main.slice2, i32 0, i32 1), align 4
  store i32 5, ptr getelementptr inbounds ({ ptr, i32, i32 }, ptr @main.slice2, i32 0, i32 2), align 4
-  %makeslice3 = call dereferenceable(60) ptr @runtime.alloc(i32 60, ptr nonnull inttoptr (i32 71 to ptr), ptr undef) #3
-  call void @runtime.trackPointer(ptr nonnull %makeslice3, ptr nonnull %stackalloc, ptr undef) #3
+  %makeslice3 = call align 4 dereferenceable(60) ptr @runtime.alloc(i32 60, ptr nonnull inttoptr (i32 71 to ptr), ptr undef) #2
+  call void @runtime.trackPointer(ptr nonnull %makeslice3, ptr nonnull %stackalloc, ptr undef)
  store ptr %makeslice3, ptr @main.slice3, align 4
  store i32 5, ptr getelementptr inbounds ({ ptr, i32, i32 }, ptr @main.slice3, i32 0, i32 1), align 4
  store i32 5, ptr getelementptr inbounds ({ ptr, i32, i32 }, ptr @main.slice3, i32 0, i32 2), align 4
@@ -121,21 +122,20 @@ entry:
 }

 ; Function Attrs: nounwind
-define hidden %runtime._interface @main.makeInterface(double %v.r, double %v.i, ptr %context) unnamed_addr #2 {
+define hidden %runtime._interface @main.makeInterface(double %v.r, double %v.i, ptr %context) unnamed_addr #1 {
 entry:
  %stackalloc = alloca i8, align 1
-  %0 = call dereferenceable(16) ptr @runtime.alloc(i32 16, ptr null, ptr undef) #3
-  call void @runtime.trackPointer(ptr nonnull %0, ptr nonnull %stackalloc, ptr undef) #3
+  %0 = call align 8 dereferenceable(16) ptr @runtime.alloc(i32 16, ptr null, ptr undef) #2
+  call void @runtime.trackPointer(ptr nonnull %0, ptr nonnull %stackalloc, ptr undef)
  store double %v.r, ptr %0, align 8
  %.repack1 = getelementptr inbounds { double, double }, ptr %0, i32 0, i32 1
  store double %v.i, ptr %.repack1, align 8
  %1 = insertvalue %runtime._interface { ptr @"reflect/types.type:basic:complex128", ptr undef }, ptr %0, 1
-  call void @runtime.trackPointer(ptr nonnull @"reflect/types.type:basic:complex128", ptr nonnull %stackalloc, ptr undef) #3
-  call void @runtime.trackPointer(ptr nonnull %0, ptr nonnull %stackalloc, ptr undef) #3
+  call void @runtime.trackPointer(ptr nonnull @"reflect/types.type:basic:complex128", ptr nonnull %stackalloc, ptr undef)
+  call void @runtime.trackPointer(ptr nonnull %0, ptr nonnull %stackalloc, ptr undef)
  ret %runtime._interface %1
 }

-attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
-attributes #1 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
-attributes #2 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
-attributes #3 = { nounwind }
+attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
+attributes #1 = { nounwind "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
+attributes #2 = { nounwind }
@@ -8,24 +8,25 @@ target triple = "wasm32-unknown-wasi"
 ; Function Attrs: allockind("alloc,zeroed") allocsize(0)
 declare noalias nonnull ptr @runtime.alloc(i32, ptr, ptr) #0

+; Function Attrs: nounwind
 declare void @runtime.trackPointer(ptr nocapture readonly, ptr, ptr) #1

 ; Function Attrs: nounwind
-define hidden void @main.init(ptr %context) unnamed_addr #2 {
+define hidden void @main.init(ptr %context) unnamed_addr #1 {
 entry:
  ret void
 }

 ; Function Attrs: nounwind
-define hidden ptr @main.unsafeSliceData(ptr %s.data, i32 %s.len, i32 %s.cap, ptr %context) unnamed_addr #2 {
+define hidden ptr @main.unsafeSliceData(ptr %s.data, i32 %s.len, i32 %s.cap, ptr %context) unnamed_addr #1 {
 entry:
  %stackalloc = alloca i8, align 1
-  call void @runtime.trackPointer(ptr %s.data, ptr nonnull %stackalloc, ptr undef) #3
+  call void @runtime.trackPointer(ptr %s.data, ptr nonnull %stackalloc, ptr undef)
  ret ptr %s.data
 }

 ; Function Attrs: nounwind
-define hidden %runtime._string @main.unsafeString(ptr dereferenceable_or_null(1) %ptr, i16 %len, ptr %context) unnamed_addr #2 {
+define hidden %runtime._string @main.unsafeString(ptr dereferenceable_or_null(1) %ptr, i16 %len, ptr %context) unnamed_addr #1 {
 entry:
  %stackalloc = alloca i8, align 1
  %0 = icmp slt i16 %len, 0
@@ -39,7 +40,7 @@ unsafe.String.next:                               ; preds = %entry
  %5 = zext i16 %len to i32
  %6 = insertvalue %runtime._string undef, ptr %ptr, 0
  %7 = insertvalue %runtime._string %6, i32 %5, 1
-  call void @runtime.trackPointer(ptr %ptr, ptr nonnull %stackalloc, ptr undef) #3
+  call void @runtime.trackPointer(ptr %ptr, ptr nonnull %stackalloc, ptr undef)
  ret %runtime._string %7

 unsafe.String.throw:                              ; preds = %entry
@@ -47,17 +48,17 @@ unsafe.String.throw:                              ; preds = %entry
  unreachable
 }

-declare void @runtime.unsafeSlicePanic(ptr) #1
+declare void @runtime.unsafeSlicePanic(ptr) #2

 ; Function Attrs: nounwind
-define hidden ptr @main.unsafeStringData(ptr %s.data, i32 %s.len, ptr %context) unnamed_addr #2 {
+define hidden ptr @main.unsafeStringData(ptr %s.data, i32 %s.len, ptr %context) unnamed_addr #1 {
 entry:
  %stackalloc = alloca i8, align 1
-  call void @runtime.trackPointer(ptr %s.data, ptr nonnull %stackalloc, ptr undef) #3
+  call void @runtime.trackPointer(ptr %s.data, ptr nonnull %stackalloc, ptr undef)
  ret ptr %s.data
 }

-attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
-attributes #1 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
-attributes #2 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
+attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
+attributes #1 = { nounwind "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
+attributes #2 = { "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
 attributes #3 = { nounwind }
@@ -8,29 +8,30 @@ target triple = "wasm32-unknown-wasi"
 ; Function Attrs: allockind("alloc,zeroed") allocsize(0)
 declare noalias nonnull ptr @runtime.alloc(i32, ptr, ptr) #0

+; Function Attrs: nounwind
 declare void @runtime.trackPointer(ptr nocapture readonly, ptr, ptr) #1

 ; Function Attrs: nounwind
-define hidden void @main.init(ptr %context) unnamed_addr #2 {
+define hidden void @main.init(ptr %context) unnamed_addr #1 {
 entry:
  ret void
 }

 ; Function Attrs: nounwind
-define hidden i32 @main.min1(i32 %a, ptr %context) unnamed_addr #2 {
+define hidden i32 @main.min1(i32 %a, ptr %context) unnamed_addr #1 {
 entry:
  ret i32 %a
 }

 ; Function Attrs: nounwind
-define hidden i32 @main.min2(i32 %a, i32 %b, ptr %context) unnamed_addr #2 {
+define hidden i32 @main.min2(i32 %a, i32 %b, ptr %context) unnamed_addr #1 {
 entry:
  %0 = call i32 @llvm.smin.i32(i32 %a, i32 %b)
  ret i32 %0
 }

 ; Function Attrs: nounwind
-define hidden i32 @main.min3(i32 %a, i32 %b, i32 %c, ptr %context) unnamed_addr #2 {
+define hidden i32 @main.min3(i32 %a, i32 %b, i32 %c, ptr %context) unnamed_addr #1 {
 entry:
  %0 = call i32 @llvm.smin.i32(i32 %a, i32 %b)
  %1 = call i32 @llvm.smin.i32(i32 %0, i32 %c)
@@ -38,7 +39,7 @@ entry:
 }

 ; Function Attrs: nounwind
-define hidden i32 @main.min4(i32 %a, i32 %b, i32 %c, i32 %d, ptr %context) unnamed_addr #2 {
+define hidden i32 @main.min4(i32 %a, i32 %b, i32 %c, i32 %d, ptr %context) unnamed_addr #1 {
 entry:
  %0 = call i32 @llvm.smin.i32(i32 %a, i32 %b)
  %1 = call i32 @llvm.smin.i32(i32 %0, i32 %c)
@@ -47,21 +48,21 @@ entry:
 }

 ; Function Attrs: nounwind
-define hidden i8 @main.minUint8(i8 %a, i8 %b, ptr %context) unnamed_addr #2 {
+define hidden i8 @main.minUint8(i8 %a, i8 %b, ptr %context) unnamed_addr #1 {
 entry:
  %0 = call i8 @llvm.umin.i8(i8 %a, i8 %b)
  ret i8 %0
 }

 ; Function Attrs: nounwind
-define hidden i32 @main.minUnsigned(i32 %a, i32 %b, ptr %context) unnamed_addr #2 {
+define hidden i32 @main.minUnsigned(i32 %a, i32 %b, ptr %context) unnamed_addr #1 {
 entry:
  %0 = call i32 @llvm.umin.i32(i32 %a, i32 %b)
  ret i32 %0
 }

 ; Function Attrs: nounwind
-define hidden float @main.minFloat32(float %a, float %b, ptr %context) unnamed_addr #2 {
+define hidden float @main.minFloat32(float %a, float %b, ptr %context) unnamed_addr #1 {
 entry:
  %0 = fcmp olt float %a, %b
  %1 = select i1 %0, float %a, float %b
@@ -69,7 +70,7 @@ entry:
 }

 ; Function Attrs: nounwind
-define hidden double @main.minFloat64(double %a, double %b, ptr %context) unnamed_addr #2 {
+define hidden double @main.minFloat64(double %a, double %b, ptr %context) unnamed_addr #1 {
 entry:
  %0 = fcmp olt double %a, %b
  %1 = select i1 %0, double %a, double %b
@@ -77,7 +78,7 @@ entry:
 }

 ; Function Attrs: nounwind
-define hidden %runtime._string @main.minString(ptr %a.data, i32 %a.len, ptr %b.data, i32 %b.len, ptr %context) unnamed_addr #2 {
+define hidden %runtime._string @main.minString(ptr %a.data, i32 %a.len, ptr %b.data, i32 %b.len, ptr %context) unnamed_addr #1 {
 entry:
  %0 = insertvalue %runtime._string zeroinitializer, ptr %a.data, 0
  %1 = insertvalue %runtime._string %0, i32 %a.len, 1
@@ -87,28 +88,28 @@ entry:
  %4 = call i1 @runtime.stringLess(ptr %a.data, i32 %a.len, ptr %b.data, i32 %b.len, ptr undef) #5
  %5 = select i1 %4, %runtime._string %1, %runtime._string %3
  %6 = extractvalue %runtime._string %5, 0
-  call void @runtime.trackPointer(ptr %6, ptr nonnull %stackalloc, ptr undef) #5
+  call void @runtime.trackPointer(ptr %6, ptr nonnull %stackalloc, ptr undef)
  ret %runtime._string %5
 }

-declare i1 @runtime.stringLess(ptr, i32, ptr, i32, ptr) #1
+declare i1 @runtime.stringLess(ptr, i32, ptr, i32, ptr) #2

 ; Function Attrs: nounwind
-define hidden i32 @main.maxInt(i32 %a, i32 %b, ptr %context) unnamed_addr #2 {
+define hidden i32 @main.maxInt(i32 %a, i32 %b, ptr %context) unnamed_addr #1 {
 entry:
  %0 = call i32 @llvm.smax.i32(i32 %a, i32 %b)
  ret i32 %0
 }

 ; Function Attrs: nounwind
-define hidden i32 @main.maxUint(i32 %a, i32 %b, ptr %context) unnamed_addr #2 {
+define hidden i32 @main.maxUint(i32 %a, i32 %b, ptr %context) unnamed_addr #1 {
 entry:
  %0 = call i32 @llvm.umax.i32(i32 %a, i32 %b)
  ret i32 %0
 }

 ; Function Attrs: nounwind
-define hidden float @main.maxFloat32(float %a, float %b, ptr %context) unnamed_addr #2 {
+define hidden float @main.maxFloat32(float %a, float %b, ptr %context) unnamed_addr #1 {
 entry:
  %0 = fcmp ogt float %a, %b
  %1 = select i1 %0, float %a, float %b
@@ -116,7 +117,7 @@ entry:
 }

 ; Function Attrs: nounwind
-define hidden %runtime._string @main.maxString(ptr %a.data, i32 %a.len, ptr %b.data, i32 %b.len, ptr %context) unnamed_addr #2 {
+define hidden %runtime._string @main.maxString(ptr %a.data, i32 %a.len, ptr %b.data, i32 %b.len, ptr %context) unnamed_addr #1 {
 entry:
  %0 = insertvalue %runtime._string zeroinitializer, ptr %a.data, 0
  %1 = insertvalue %runtime._string %0, i32 %a.len, 1
@@ -126,12 +127,12 @@ entry:
  %4 = call i1 @runtime.stringLess(ptr %b.data, i32 %b.len, ptr %a.data, i32 %a.len, ptr undef) #5
  %5 = select i1 %4, %runtime._string %1, %runtime._string %3
  %6 = extractvalue %runtime._string %5, 0
-  call void @runtime.trackPointer(ptr %6, ptr nonnull %stackalloc, ptr undef) #5
+  call void @runtime.trackPointer(ptr %6, ptr nonnull %stackalloc, ptr undef)
  ret %runtime._string %5
 }

 ; Function Attrs: nounwind
-define hidden void @main.clearSlice(ptr %s.data, i32 %s.len, i32 %s.cap, ptr %context) unnamed_addr #2 {
+define hidden void @main.clearSlice(ptr %s.data, i32 %s.len, i32 %s.cap, ptr %context) unnamed_addr #1 {
 entry:
  %0 = shl i32 %s.len, 2
  call void @llvm.memset.p0.i32(ptr align 4 %s.data, i8 0, i32 %0, i1 false)
@@ -142,19 +143,19 @@ entry:
 declare void @llvm.memset.p0.i32(ptr nocapture writeonly, i8, i32, i1 immarg) #3

 ; Function Attrs: nounwind
-define hidden void @main.clearZeroSizedSlice(ptr %s.data, i32 %s.len, i32 %s.cap, ptr %context) unnamed_addr #2 {
+define hidden void @main.clearZeroSizedSlice(ptr %s.data, i32 %s.len, i32 %s.cap, ptr %context) unnamed_addr #1 {
 entry:
  ret void
 }

 ; Function Attrs: nounwind
-define hidden void @main.clearMap(ptr dereferenceable_or_null(40) %m, ptr %context) unnamed_addr #2 {
+define hidden void @main.clearMap(ptr dereferenceable_or_null(40) %m, ptr %context) unnamed_addr #1 {
 entry:
  call void @runtime.hashmapClear(ptr %m, ptr undef) #5
  ret void
 }

-declare void @runtime.hashmapClear(ptr dereferenceable_or_null(40), ptr) #1
+declare void @runtime.hashmapClear(ptr dereferenceable_or_null(40), ptr) #2

 ; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
 declare i32 @llvm.smin.i32(i32, i32) #4
@@ -171,9 +172,9 @@ declare i32 @llvm.smax.i32(i32, i32) #4
 ; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
 declare i32 @llvm.umax.i32(i32, i32) #4

-attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
-attributes #1 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
-attributes #2 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
+attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
+attributes #1 = { nounwind "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
+attributes #2 = { "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
 attributes #3 = { nocallback nofree nounwind willreturn memory(argmem: write) }
 attributes #4 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
 attributes #5 = { nounwind }
@@ -63,9 +63,9 @@ entry:
 ; Function Attrs: nounwind
 define hidden void @main.closureFunctionGoroutine(ptr %context) unnamed_addr #1 {
 entry:
-  %n = call dereferenceable(4) ptr @runtime.alloc(i32 4, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #9
+  %n = call align 4 dereferenceable(4) ptr @runtime.alloc(i32 4, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #9
  store i32 3, ptr %n, align 4
-  %0 = call dereferenceable(8) ptr @runtime.alloc(i32 8, ptr null, ptr undef) #9
+  %0 = call align 4 dereferenceable(8) ptr @runtime.alloc(i32 8, ptr null, ptr undef) #9
  store i32 5, ptr %0, align 4
  %1 = getelementptr inbounds { i32, ptr }, ptr %0, i32 0, i32 1
  store ptr %n, ptr %1, align 4
@@ -98,7 +98,7 @@ declare void @runtime.printint32(i32, ptr) #2
 ; Function Attrs: nounwind
 define hidden void @main.funcGoroutine(ptr %fn.context, ptr %fn.funcptr, ptr %context) unnamed_addr #1 {
 entry:
-  %0 = call dereferenceable(12) ptr @runtime.alloc(i32 12, ptr null, ptr undef) #9
+  %0 = call align 4 dereferenceable(12) ptr @runtime.alloc(i32 12, ptr null, ptr undef) #9
  store i32 5, ptr %0, align 4
  %1 = getelementptr inbounds { i32, ptr, ptr }, ptr %0, i32 0, i32 1
  store ptr %fn.context, ptr %1, align 4
@@ -148,7 +148,7 @@ declare void @runtime.chanClose(ptr dereferenceable_or_null(32), ptr) #2
 ; Function Attrs: nounwind
 define hidden void @main.startInterfaceMethod(ptr %itf.typecode, ptr %itf.value, ptr %context) unnamed_addr #1 {
 entry:
-  %0 = call dereferenceable(16) ptr @runtime.alloc(i32 16, ptr null, ptr undef) #9
+  %0 = call align 4 dereferenceable(16) ptr @runtime.alloc(i32 16, ptr null, ptr undef) #9
  store ptr %itf.value, ptr %0, align 4
  %1 = getelementptr inbounds { ptr, %runtime._string, ptr }, ptr %0, i32 0, i32 1
  store ptr @"main$string", ptr %1, align 4
@@ -10,24 +10,25 @@ target triple = "wasm32-unknown-wasi"
 ; Function Attrs: allockind("alloc,zeroed") allocsize(0)
 declare noalias nonnull ptr @runtime.alloc(i32, ptr, ptr) #0

+; Function Attrs: nounwind
 declare void @runtime.trackPointer(ptr nocapture readonly, ptr, ptr) #1

 ; Function Attrs: nounwind
-define hidden void @main.init(ptr %context) unnamed_addr #2 {
+define hidden void @main.init(ptr %context) unnamed_addr #1 {
 entry:
  ret void
 }

 ; Function Attrs: nounwind
-define hidden void @main.regularFunctionGoroutine(ptr %context) unnamed_addr #2 {
+define hidden void @main.regularFunctionGoroutine(ptr %context) unnamed_addr #1 {
 entry:
  call void @"internal/task.start"(i32 ptrtoint (ptr @"main.regularFunction$gowrapper" to i32), ptr nonnull inttoptr (i32 5 to ptr), i32 65536, ptr undef) #9
  ret void
 }

-declare void @main.regularFunction(i32, ptr) #1
+declare void @main.regularFunction(i32, ptr) #2

-declare void @runtime.deadlock(ptr) #1
+declare void @runtime.deadlock(ptr) #2

 ; Function Attrs: nounwind
 define linkonce_odr void @"main.regularFunction$gowrapper"(ptr %0) unnamed_addr #3 {
@@ -38,17 +39,17 @@ entry:
  unreachable
 }

-declare void @"internal/task.start"(i32, ptr, i32, ptr) #1
+declare void @"internal/task.start"(i32, ptr, i32, ptr) #2

 ; Function Attrs: nounwind
-define hidden void @main.inlineFunctionGoroutine(ptr %context) unnamed_addr #2 {
+define hidden void @main.inlineFunctionGoroutine(ptr %context) unnamed_addr #1 {
 entry:
  call void @"internal/task.start"(i32 ptrtoint (ptr @"main.inlineFunctionGoroutine$1$gowrapper" to i32), ptr nonnull inttoptr (i32 5 to ptr), i32 65536, ptr undef) #9
  ret void
 }

 ; Function Attrs: nounwind
-define internal void @"main.inlineFunctionGoroutine$1"(i32 %x, ptr %context) unnamed_addr #2 {
+define internal void @"main.inlineFunctionGoroutine$1"(i32 %x, ptr %context) unnamed_addr #1 {
 entry:
  ret void
 }
@@ -63,16 +64,16 @@ entry:
 }

 ; Function Attrs: nounwind
-define hidden void @main.closureFunctionGoroutine(ptr %context) unnamed_addr #2 {
+define hidden void @main.closureFunctionGoroutine(ptr %context) unnamed_addr #1 {
 entry:
  %stackalloc = alloca i8, align 1
-  %n = call dereferenceable(4) ptr @runtime.alloc(i32 4, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #9
-  call void @runtime.trackPointer(ptr nonnull %n, ptr nonnull %stackalloc, ptr undef) #9
+  %n = call align 4 dereferenceable(4) ptr @runtime.alloc(i32 4, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #9
+  call void @runtime.trackPointer(ptr nonnull %n, ptr nonnull %stackalloc, ptr undef)
  store i32 3, ptr %n, align 4
-  call void @runtime.trackPointer(ptr nonnull %n, ptr nonnull %stackalloc, ptr undef) #9
-  call void @runtime.trackPointer(ptr nonnull @"main.closureFunctionGoroutine$1", ptr nonnull %stackalloc, ptr undef) #9
-  %0 = call dereferenceable(8) ptr @runtime.alloc(i32 8, ptr null, ptr undef) #9
-  call void @runtime.trackPointer(ptr nonnull %0, ptr nonnull %stackalloc, ptr undef) #9
+  call void @runtime.trackPointer(ptr nonnull %n, ptr nonnull %stackalloc, ptr undef)
+  call void @runtime.trackPointer(ptr nonnull @"main.closureFunctionGoroutine$1", ptr nonnull %stackalloc, ptr undef)
+  %0 = call align 4 dereferenceable(8) ptr @runtime.alloc(i32 8, ptr null, ptr undef) #9
+  call void @runtime.trackPointer(ptr nonnull %0, ptr nonnull %stackalloc, ptr undef)
  store i32 5, ptr %0, align 4
  %1 = getelementptr inbounds { i32, ptr }, ptr %0, i32 0, i32 1
  store ptr %n, ptr %1, align 4
@@ -83,7 +84,7 @@ entry:
 }

 ; Function Attrs: nounwind
-define internal void @"main.closureFunctionGoroutine$1"(i32 %x, ptr %context) unnamed_addr #2 {
+define internal void @"main.closureFunctionGoroutine$1"(i32 %x, ptr %context) unnamed_addr #1 {
 entry:
  store i32 7, ptr %context, align 4
  ret void
@@ -100,14 +101,14 @@ entry:
  unreachable
 }

-declare void @runtime.printint32(i32, ptr) #1
+declare void @runtime.printint32(i32, ptr) #2

 ; Function Attrs: nounwind
-define hidden void @main.funcGoroutine(ptr %fn.context, ptr %fn.funcptr, ptr %context) unnamed_addr #2 {
+define hidden void @main.funcGoroutine(ptr %fn.context, ptr %fn.funcptr, ptr %context) unnamed_addr #1 {
 entry:
  %stackalloc = alloca i8, align 1
-  %0 = call dereferenceable(12) ptr @runtime.alloc(i32 12, ptr null, ptr undef) #9
-  call void @runtime.trackPointer(ptr nonnull %0, ptr nonnull %stackalloc, ptr undef) #9
+  %0 = call align 4 dereferenceable(12) ptr @runtime.alloc(i32 12, ptr null, ptr undef) #9
+  call void @runtime.trackPointer(ptr nonnull %0, ptr nonnull %stackalloc, ptr undef)
  store i32 5, ptr %0, align 4
  %1 = getelementptr inbounds { i32, ptr, ptr }, ptr %0, i32 0, i32 1
  store ptr %fn.context, ptr %1, align 4
@@ -131,35 +132,35 @@ entry:
 }

 ; Function Attrs: nounwind
-define hidden void @main.recoverBuiltinGoroutine(ptr %context) unnamed_addr #2 {
+define hidden void @main.recoverBuiltinGoroutine(ptr %context) unnamed_addr #1 {
 entry:
  ret void
 }

 ; Function Attrs: nounwind
-define hidden void @main.copyBuiltinGoroutine(ptr %dst.data, i32 %dst.len, i32 %dst.cap, ptr %src.data, i32 %src.len, i32 %src.cap, ptr %context) unnamed_addr #2 {
+define hidden void @main.copyBuiltinGoroutine(ptr %dst.data, i32 %dst.len, i32 %dst.cap, ptr %src.data, i32 %src.len, i32 %src.cap, ptr %context) unnamed_addr #1 {
 entry:
  %copy.n = call i32 @runtime.sliceCopy(ptr %dst.data, ptr %src.data, i32 %dst.len, i32 %src.len, i32 1, ptr undef) #9
  ret void
 }

-declare i32 @runtime.sliceCopy(ptr nocapture writeonly, ptr nocapture readonly, i32, i32, i32, ptr) #1
+declare i32 @runtime.sliceCopy(ptr nocapture writeonly, ptr nocapture readonly, i32, i32, i32, ptr) #2

 ; Function Attrs: nounwind
-define hidden void @main.closeBuiltinGoroutine(ptr dereferenceable_or_null(32) %ch, ptr %context) unnamed_addr #2 {
+define hidden void @main.closeBuiltinGoroutine(ptr dereferenceable_or_null(32) %ch, ptr %context) unnamed_addr #1 {
 entry:
  call void @runtime.chanClose(ptr %ch, ptr undef) #9
  ret void
 }

-declare void @runtime.chanClose(ptr dereferenceable_or_null(32), ptr) #1
+declare void @runtime.chanClose(ptr dereferenceable_or_null(32), ptr) #2

 ; Function Attrs: nounwind
-define hidden void @main.startInterfaceMethod(ptr %itf.typecode, ptr %itf.value, ptr %context) unnamed_addr #2 {
+define hidden void @main.startInterfaceMethod(ptr %itf.typecode, ptr %itf.value, ptr %context) unnamed_addr #1 {
 entry:
  %stackalloc = alloca i8, align 1
-  %0 = call dereferenceable(16) ptr @runtime.alloc(i32 16, ptr null, ptr undef) #9
-  call void @runtime.trackPointer(ptr nonnull %0, ptr nonnull %stackalloc, ptr undef) #9
+  %0 = call align 4 dereferenceable(16) ptr @runtime.alloc(i32 16, ptr null, ptr undef) #9
+  call void @runtime.trackPointer(ptr nonnull %0, ptr nonnull %stackalloc, ptr undef)
  store ptr %itf.value, ptr %0, align 4
  %1 = getelementptr inbounds { ptr, %runtime._string, ptr }, ptr %0, i32 0, i32 1
  store ptr @"main$string", ptr %1, align 4
@@ -188,13 +189,13 @@ entry:
  unreachable
 }

-attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
-attributes #1 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
-attributes #2 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
-attributes #3 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" "tinygo-gowrapper"="main.regularFunction" }
-attributes #4 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" "tinygo-gowrapper"="main.inlineFunctionGoroutine$1" }
-attributes #5 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" "tinygo-gowrapper"="main.closureFunctionGoroutine$1" }
-attributes #6 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" "tinygo-gowrapper" }
-attributes #7 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" "tinygo-invoke"="reflect/methods.Print(string)" "tinygo-methods"="reflect/methods.Print(string)" }
-attributes #8 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" "tinygo-gowrapper"="interface:{Print:func:{basic:string}{}}.Print$invoke" }
+attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
+attributes #1 = { nounwind "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
+attributes #2 = { "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
+attributes #3 = { nounwind "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" "tinygo-gowrapper"="main.regularFunction" }
+attributes #4 = { nounwind "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" "tinygo-gowrapper"="main.inlineFunctionGoroutine$1" }
+attributes #5 = { nounwind "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" "tinygo-gowrapper"="main.closureFunctionGoroutine$1" }
+attributes #6 = { nounwind "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" "tinygo-gowrapper" }
+attributes #7 = { "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" "tinygo-invoke"="reflect/methods.Print(string)" "tinygo-methods"="reflect/methods.Print(string)" }
+attributes #8 = { nounwind "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" "tinygo-gowrapper"="interface:{Print:func:{basic:string}{}}.Print$invoke" }
 attributes #9 = { nounwind }
@@ -20,52 +20,53 @@ target triple = "wasm32-unknown-wasi"
 ; Function Attrs: allockind("alloc,zeroed") allocsize(0)
 declare noalias nonnull ptr @runtime.alloc(i32, ptr, ptr) #0

+; Function Attrs: nounwind
 declare void @runtime.trackPointer(ptr nocapture readonly, ptr, ptr) #1

 ; Function Attrs: nounwind
-define hidden void @main.init(ptr %context) unnamed_addr #2 {
+define hidden void @main.init(ptr %context) unnamed_addr #1 {
 entry:
  ret void
 }

 ; Function Attrs: nounwind
-define hidden %runtime._interface @main.simpleType(ptr %context) unnamed_addr #2 {
+define hidden %runtime._interface @main.simpleType(ptr %context) unnamed_addr #1 {
 entry:
  %stackalloc = alloca i8, align 1
-  call void @runtime.trackPointer(ptr nonnull @"reflect/types.type:basic:int", ptr nonnull %stackalloc, ptr undef) #7
-  call void @runtime.trackPointer(ptr null, ptr nonnull %stackalloc, ptr undef) #7
+  call void @runtime.trackPointer(ptr nonnull @"reflect/types.type:basic:int", ptr nonnull %stackalloc, ptr undef)
+  call void @runtime.trackPointer(ptr null, ptr nonnull %stackalloc, ptr undef)
  ret %runtime._interface { ptr @"reflect/types.type:basic:int", ptr null }
 }

 ; Function Attrs: nounwind
-define hidden %runtime._interface @main.pointerType(ptr %context) unnamed_addr #2 {
+define hidden %runtime._interface @main.pointerType(ptr %context) unnamed_addr #1 {
 entry:
  %stackalloc = alloca i8, align 1
-  call void @runtime.trackPointer(ptr nonnull @"reflect/types.type:pointer:basic:int", ptr nonnull %stackalloc, ptr undef) #7
-  call void @runtime.trackPointer(ptr null, ptr nonnull %stackalloc, ptr undef) #7
+  call void @runtime.trackPointer(ptr nonnull @"reflect/types.type:pointer:basic:int", ptr nonnull %stackalloc, ptr undef)
+  call void @runtime.trackPointer(ptr null, ptr nonnull %stackalloc, ptr undef)
  ret %runtime._interface { ptr @"reflect/types.type:pointer:basic:int", ptr null }
 }

 ; Function Attrs: nounwind
-define hidden %runtime._interface @main.interfaceType(ptr %context) unnamed_addr #2 {
+define hidden %runtime._interface @main.interfaceType(ptr %context) unnamed_addr #1 {
 entry:
  %stackalloc = alloca i8, align 1
-  call void @runtime.trackPointer(ptr nonnull @"reflect/types.type:pointer:named:error", ptr nonnull %stackalloc, ptr undef) #7
-  call void @runtime.trackPointer(ptr null, ptr nonnull %stackalloc, ptr undef) #7
+  call void @runtime.trackPointer(ptr nonnull @"reflect/types.type:pointer:named:error", ptr nonnull %stackalloc, ptr undef)
+  call void @runtime.trackPointer(ptr null, ptr nonnull %stackalloc, ptr undef)
  ret %runtime._interface { ptr @"reflect/types.type:pointer:named:error", ptr null }
 }

 ; Function Attrs: nounwind
-define hidden %runtime._interface @main.anonymousInterfaceType(ptr %context) unnamed_addr #2 {
+define hidden %runtime._interface @main.anonymousInterfaceType(ptr %context) unnamed_addr #1 {
 entry:
  %stackalloc = alloca i8, align 1
-  call void @runtime.trackPointer(ptr nonnull @"reflect/types.type:pointer:interface:{String:func:{}{basic:string}}", ptr nonnull %stackalloc, ptr undef) #7
-  call void @runtime.trackPointer(ptr null, ptr nonnull %stackalloc, ptr undef) #7
+  call void @runtime.trackPointer(ptr nonnull @"reflect/types.type:pointer:interface:{String:func:{}{basic:string}}", ptr nonnull %stackalloc, ptr undef)
+  call void @runtime.trackPointer(ptr null, ptr nonnull %stackalloc, ptr undef)
  ret %runtime._interface { ptr @"reflect/types.type:pointer:interface:{String:func:{}{basic:string}}", ptr null }
 }

 ; Function Attrs: nounwind
-define hidden i1 @main.isInt(ptr %itf.typecode, ptr %itf.value, ptr %context) unnamed_addr #2 {
+define hidden i1 @main.isInt(ptr %itf.typecode, ptr %itf.value, ptr %context) unnamed_addr #1 {
 entry:
  %typecode = call i1 @runtime.typeAssert(ptr %itf.typecode, ptr nonnull @"reflect/types.typeid:basic:int", ptr undef) #7
  br i1 %typecode, label %typeassert.ok, label %typeassert.next
@@ -77,10 +78,10 @@ typeassert.ok:                                    ; preds = %entry
  br label %typeassert.next
 }

-declare i1 @runtime.typeAssert(ptr, ptr dereferenceable_or_null(1), ptr) #1
+declare i1 @runtime.typeAssert(ptr, ptr dereferenceable_or_null(1), ptr) #2

 ; Function Attrs: nounwind
-define hidden i1 @main.isError(ptr %itf.typecode, ptr %itf.value, ptr %context) unnamed_addr #2 {
+define hidden i1 @main.isError(ptr %itf.typecode, ptr %itf.value, ptr %context) unnamed_addr #1 {
 entry:
  %0 = call i1 @"interface:{Error:func:{}{basic:string}}.$typeassert"(ptr %itf.typecode) #7
  br i1 %0, label %typeassert.ok, label %typeassert.next
@@ -95,7 +96,7 @@ typeassert.ok:                                    ; preds = %entry
 declare i1 @"interface:{Error:func:{}{basic:string}}.$typeassert"(ptr) #3

 ; Function Attrs: nounwind
-define hidden i1 @main.isStringer(ptr %itf.typecode, ptr %itf.value, ptr %context) unnamed_addr #2 {
+define hidden i1 @main.isStringer(ptr %itf.typecode, ptr %itf.value, ptr %context) unnamed_addr #1 {
 entry:
  %0 = call i1 @"interface:{String:func:{}{basic:string}}.$typeassert"(ptr %itf.typecode) #7
  br i1 %0, label %typeassert.ok, label %typeassert.next
@@ -110,7 +111,7 @@ typeassert.ok:                                    ; preds = %entry
 declare i1 @"interface:{String:func:{}{basic:string}}.$typeassert"(ptr) #4

 ; Function Attrs: nounwind
-define hidden i8 @main.callFooMethod(ptr %itf.typecode, ptr %itf.value, ptr %context) unnamed_addr #2 {
+define hidden i8 @main.callFooMethod(ptr %itf.typecode, ptr %itf.value, ptr %context) unnamed_addr #1 {
 entry:
  %0 = call i8 @"interface:{String:func:{}{basic:string},main.foo:func:{basic:int}{basic:uint8}}.foo$invoke"(ptr %itf.value, i32 3, ptr %itf.typecode, ptr undef) #7
  ret i8 %0
@@ -119,22 +120,22 @@ entry:
 declare i8 @"interface:{String:func:{}{basic:string},main.foo:func:{basic:int}{basic:uint8}}.foo$invoke"(ptr, i32, ptr, ptr) #5

 ; Function Attrs: nounwind
-define hidden %runtime._string @main.callErrorMethod(ptr %itf.typecode, ptr %itf.value, ptr %context) unnamed_addr #2 {
+define hidden %runtime._string @main.callErrorMethod(ptr %itf.typecode, ptr %itf.value, ptr %context) unnamed_addr #1 {
 entry:
  %stackalloc = alloca i8, align 1
  %0 = call %runtime._string @"interface:{Error:func:{}{basic:string}}.Error$invoke"(ptr %itf.value, ptr %itf.typecode, ptr undef) #7
  %1 = extractvalue %runtime._string %0, 0
-  call void @runtime.trackPointer(ptr %1, ptr nonnull %stackalloc, ptr undef) #7
+  call void @runtime.trackPointer(ptr %1, ptr nonnull %stackalloc, ptr undef)
  ret %runtime._string %0
 }

 declare %runtime._string @"interface:{Error:func:{}{basic:string}}.Error$invoke"(ptr, ptr, ptr) #6

-attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
-attributes #1 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
-attributes #2 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
-attributes #3 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" "tinygo-methods"="reflect/methods.Error() string" }
-attributes #4 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" "tinygo-methods"="reflect/methods.String() string" }
-attributes #5 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" "tinygo-invoke"="main.$methods.foo(int) uint8" "tinygo-methods"="reflect/methods.String() string; main.$methods.foo(int) uint8" }
-attributes #6 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" "tinygo-invoke"="reflect/methods.Error() string" "tinygo-methods"="reflect/methods.Error() string" }
+attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
+attributes #1 = { nounwind "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
+attributes #2 = { "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
+attributes #3 = { "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" "tinygo-methods"="reflect/methods.Error() string" }
+attributes #4 = { "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" "tinygo-methods"="reflect/methods.String() string" }
+attributes #5 = { "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" "tinygo-invoke"="main.$methods.foo(int) uint8" "tinygo-methods"="reflect/methods.String() string; main.$methods.foo(int) uint8" }
+attributes #6 = { "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" "tinygo-invoke"="reflect/methods.Error() string" "tinygo-methods"="reflect/methods.Error() string" }
 attributes #7 = { nounwind }
@@ -6,45 +6,44 @@ target triple = "wasm32-unknown-wasi"
 ; Function Attrs: allockind("alloc,zeroed") allocsize(0)
 declare noalias nonnull ptr @runtime.alloc(i32, ptr, ptr) #0

+; Function Attrs: nounwind
 declare void @runtime.trackPointer(ptr nocapture readonly, ptr, ptr) #1

 ; Function Attrs: nounwind
-define hidden void @main.init(ptr %context) unnamed_addr #2 {
+define hidden void @main.init(ptr %context) unnamed_addr #1 {
 entry:
  ret void
 }

 ; Function Attrs: nounwind
-define hidden [0 x i32] @main.pointerDerefZero(ptr %x, ptr %context) unnamed_addr #2 {
+define hidden [0 x i32] @main.pointerDerefZero(ptr %x, ptr %context) unnamed_addr #1 {
 entry:
  ret [0 x i32] zeroinitializer
 }

 ; Function Attrs: nounwind
-define hidden ptr @main.pointerCastFromUnsafe(ptr %x, ptr %context) unnamed_addr #2 {
+define hidden ptr @main.pointerCastFromUnsafe(ptr %x, ptr %context) unnamed_addr #1 {
 entry:
  %stackalloc = alloca i8, align 1
-  call void @runtime.trackPointer(ptr %x, ptr nonnull %stackalloc, ptr undef) #3
+  call void @runtime.trackPointer(ptr %x, ptr nonnull %stackalloc, ptr undef)
  ret ptr %x
 }

 ; Function Attrs: nounwind
-define hidden ptr @main.pointerCastToUnsafe(ptr dereferenceable_or_null(4) %x, ptr %context) unnamed_addr #2 {
+define hidden ptr @main.pointerCastToUnsafe(ptr dereferenceable_or_null(4) %x, ptr %context) unnamed_addr #1 {
 entry:
  %stackalloc = alloca i8, align 1
-  call void @runtime.trackPointer(ptr %x, ptr nonnull %stackalloc, ptr undef) #3
+  call void @runtime.trackPointer(ptr %x, ptr nonnull %stackalloc, ptr undef)
  ret ptr %x
 }

 ; Function Attrs: nounwind
-define hidden ptr @main.pointerCastToUnsafeNoop(ptr dereferenceable_or_null(1) %x, ptr %context) unnamed_addr #2 {
+define hidden ptr @main.pointerCastToUnsafeNoop(ptr dereferenceable_or_null(1) %x, ptr %context) unnamed_addr #1 {
 entry:
  %stackalloc = alloca i8, align 1
-  call void @runtime.trackPointer(ptr %x, ptr nonnull %stackalloc, ptr undef) #3
+  call void @runtime.trackPointer(ptr %x, ptr nonnull %stackalloc, ptr undef)
  ret ptr %x
 }

-attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
-attributes #1 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
-attributes #2 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
-attributes #3 = { nounwind }
+attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
+attributes #1 = { nounwind "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
@@ -14,27 +14,28 @@ target triple = "wasm32-unknown-wasi"
 ; Function Attrs: allockind("alloc,zeroed") allocsize(0)
 declare noalias nonnull ptr @runtime.alloc(i32, ptr, ptr) #0

+; Function Attrs: nounwind
 declare void @runtime.trackPointer(ptr nocapture readonly, ptr, ptr) #1

 ; Function Attrs: nounwind
-define hidden void @main.init(ptr %context) unnamed_addr #2 {
+define hidden void @main.init(ptr %context) unnamed_addr #1 {
 entry:
  ret void
 }

 ; Function Attrs: nounwind
-define void @extern_func() #3 {
+define void @extern_func() #2 {
 entry:
  ret void
 }

 ; Function Attrs: nounwind
-define hidden void @somepkg.someFunction1(ptr %context) unnamed_addr #2 {
+define hidden void @somepkg.someFunction1(ptr %context) unnamed_addr #1 {
 entry:
  ret void
 }

-declare void @somepkg.someFunction2(ptr) #1
+declare void @somepkg.someFunction2(ptr) #3

 ; Function Attrs: inlinehint nounwind
 define hidden void @main.inlineFunc(ptr %context) unnamed_addr #4 {
@@ -70,15 +71,15 @@ entry:
  ret void
 }

-declare void @main.undefinedFunctionNotInSection(ptr) #1
+declare void @main.undefinedFunctionNotInSection(ptr) #3

-attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
-attributes #1 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
-attributes #2 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
-attributes #3 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" "wasm-export-name"="extern_func" }
-attributes #4 = { inlinehint nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
-attributes #5 = { noinline nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
-attributes #6 = { noinline nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" "wasm-export-name"="exportedFunctionInSection" }
-attributes #7 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" "wasm-import-module"="modulename" "wasm-import-name"="import1" }
-attributes #8 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" "wasm-import-module"="foobar" "wasm-import-name"="imported" }
-attributes #9 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" "wasm-export-name"="exported" }
+attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
+attributes #1 = { nounwind "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
+attributes #2 = { nounwind "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" "wasm-export-name"="extern_func" }
+attributes #3 = { "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
+attributes #4 = { inlinehint nounwind "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
+attributes #5 = { noinline nounwind "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
+attributes #6 = { noinline nounwind "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" "wasm-export-name"="exportedFunctionInSection" }
+attributes #7 = { "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" "wasm-import-module"="modulename" "wasm-import-name"="import1" }
+attributes #8 = { "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" "wasm-import-module"="foobar" "wasm-import-name"="imported" }
+attributes #9 = { nounwind "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" "wasm-export-name"="exported" }
@@ -6,28 +6,29 @@ target triple = "wasm32-unknown-wasi"
 ; Function Attrs: allockind("alloc,zeroed") allocsize(0)
 declare noalias nonnull ptr @runtime.alloc(i32, ptr, ptr) #0

+; Function Attrs: nounwind
 declare void @runtime.trackPointer(ptr nocapture readonly, ptr, ptr) #1

 ; Function Attrs: nounwind
-define hidden void @main.init(ptr %context) unnamed_addr #2 {
+define hidden void @main.init(ptr %context) unnamed_addr #1 {
 entry:
  ret void
 }

 ; Function Attrs: nounwind
-define hidden i32 @main.sliceLen(ptr %ints.data, i32 %ints.len, i32 %ints.cap, ptr %context) unnamed_addr #2 {
+define hidden i32 @main.sliceLen(ptr %ints.data, i32 %ints.len, i32 %ints.cap, ptr %context) unnamed_addr #1 {
 entry:
  ret i32 %ints.len
 }

 ; Function Attrs: nounwind
-define hidden i32 @main.sliceCap(ptr %ints.data, i32 %ints.len, i32 %ints.cap, ptr %context) unnamed_addr #2 {
+define hidden i32 @main.sliceCap(ptr %ints.data, i32 %ints.len, i32 %ints.cap, ptr %context) unnamed_addr #1 {
 entry:
  ret i32 %ints.cap
 }

 ; Function Attrs: nounwind
-define hidden i32 @main.sliceElement(ptr %ints.data, i32 %ints.len, i32 %ints.cap, i32 %index, ptr %context) unnamed_addr #2 {
+define hidden i32 @main.sliceElement(ptr %ints.data, i32 %ints.len, i32 %ints.cap, i32 %index, ptr %context) unnamed_addr #1 {
 entry:
  %.not = icmp ult i32 %index, %ints.len
  br i1 %.not, label %lookup.next, label %lookup.throw
@@ -42,14 +43,14 @@ lookup.throw:                                     ; preds = %entry
  unreachable
 }

-declare void @runtime.lookupPanic(ptr) #1
+declare void @runtime.lookupPanic(ptr) #2

 ; Function Attrs: nounwind
-define hidden { ptr, i32, i32 } @main.sliceAppendValues(ptr %ints.data, i32 %ints.len, i32 %ints.cap, ptr %context) unnamed_addr #2 {
+define hidden { ptr, i32, i32 } @main.sliceAppendValues(ptr %ints.data, i32 %ints.len, i32 %ints.cap, ptr %context) unnamed_addr #1 {
 entry:
  %stackalloc = alloca i8, align 1
-  %varargs = call dereferenceable(12) ptr @runtime.alloc(i32 12, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #3
-  call void @runtime.trackPointer(ptr nonnull %varargs, ptr nonnull %stackalloc, ptr undef) #3
+  %varargs = call align 4 dereferenceable(12) ptr @runtime.alloc(i32 12, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #3
+  call void @runtime.trackPointer(ptr nonnull %varargs, ptr nonnull %stackalloc, ptr undef)
  store i32 1, ptr %varargs, align 4
  %0 = getelementptr inbounds [3 x i32], ptr %varargs, i32 0, i32 1
  store i32 2, ptr %0, align 4
@@ -62,14 +63,14 @@ entry:
  %2 = insertvalue { ptr, i32, i32 } undef, ptr %append.newPtr, 0
  %3 = insertvalue { ptr, i32, i32 } %2, i32 %append.newLen, 1
  %4 = insertvalue { ptr, i32, i32 } %3, i32 %append.newCap, 2
-  call void @runtime.trackPointer(ptr %append.newPtr, ptr nonnull %stackalloc, ptr undef) #3
+  call void @runtime.trackPointer(ptr %append.newPtr, ptr nonnull %stackalloc, ptr undef)
  ret { ptr, i32, i32 } %4
 }

-declare { ptr, i32, i32 } @runtime.sliceAppend(ptr, ptr nocapture readonly, i32, i32, i32, i32, ptr) #1
+declare { ptr, i32, i32 } @runtime.sliceAppend(ptr, ptr nocapture readonly, i32, i32, i32, i32, ptr) #2

 ; Function Attrs: nounwind
-define hidden { ptr, i32, i32 } @main.sliceAppendSlice(ptr %ints.data, i32 %ints.len, i32 %ints.cap, ptr %added.data, i32 %added.len, i32 %added.cap, ptr %context) unnamed_addr #2 {
+define hidden { ptr, i32, i32 } @main.sliceAppendSlice(ptr %ints.data, i32 %ints.len, i32 %ints.cap, ptr %added.data, i32 %added.len, i32 %added.cap, ptr %context) unnamed_addr #1 {
 entry:
  %stackalloc = alloca i8, align 1
  %append.new = call { ptr, i32, i32 } @runtime.sliceAppend(ptr %ints.data, ptr %added.data, i32 %ints.len, i32 %ints.cap, i32 %added.len, i32 4, ptr undef) #3
@@ -79,32 +80,32 @@ entry:
  %0 = insertvalue { ptr, i32, i32 } undef, ptr %append.newPtr, 0
  %1 = insertvalue { ptr, i32, i32 } %0, i32 %append.newLen, 1
  %2 = insertvalue { ptr, i32, i32 } %1, i32 %append.newCap, 2
-  call void @runtime.trackPointer(ptr %append.newPtr, ptr nonnull %stackalloc, ptr undef) #3
+  call void @runtime.trackPointer(ptr %append.newPtr, ptr nonnull %stackalloc, ptr undef)
  ret { ptr, i32, i32 } %2
 }

 ; Function Attrs: nounwind
-define hidden i32 @main.sliceCopy(ptr %dst.data, i32 %dst.len, i32 %dst.cap, ptr %src.data, i32 %src.len, i32 %src.cap, ptr %context) unnamed_addr #2 {
+define hidden i32 @main.sliceCopy(ptr %dst.data, i32 %dst.len, i32 %dst.cap, ptr %src.data, i32 %src.len, i32 %src.cap, ptr %context) unnamed_addr #1 {
 entry:
  %copy.n = call i32 @runtime.sliceCopy(ptr %dst.data, ptr %src.data, i32 %dst.len, i32 %src.len, i32 4, ptr undef) #3
  ret i32 %copy.n
 }

-declare i32 @runtime.sliceCopy(ptr nocapture writeonly, ptr nocapture readonly, i32, i32, i32, ptr) #1
+declare i32 @runtime.sliceCopy(ptr nocapture writeonly, ptr nocapture readonly, i32, i32, i32, ptr) #2

 ; Function Attrs: nounwind
-define hidden { ptr, i32, i32 } @main.makeByteSlice(i32 %len, ptr %context) unnamed_addr #2 {
+define hidden { ptr, i32, i32 } @main.makeByteSlice(i32 %len, ptr %context) unnamed_addr #1 {
 entry:
  %stackalloc = alloca i8, align 1
  %slice.maxcap = icmp slt i32 %len, 0
  br i1 %slice.maxcap, label %slice.throw, label %slice.next

 slice.next:                                       ; preds = %entry
-  %makeslice.buf = call ptr @runtime.alloc(i32 %len, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #3
+  %makeslice.buf = call align 1 ptr @runtime.alloc(i32 %len, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #3
  %0 = insertvalue { ptr, i32, i32 } undef, ptr %makeslice.buf, 0
  %1 = insertvalue { ptr, i32, i32 } %0, i32 %len, 1
  %2 = insertvalue { ptr, i32, i32 } %1, i32 %len, 2
-  call void @runtime.trackPointer(ptr nonnull %makeslice.buf, ptr nonnull %stackalloc, ptr undef) #3
+  call void @runtime.trackPointer(ptr nonnull %makeslice.buf, ptr nonnull %stackalloc, ptr undef)
  ret { ptr, i32, i32 } %2

 slice.throw:                                      ; preds = %entry
@@ -112,10 +113,10 @@ slice.throw:                                      ; preds = %entry
  unreachable
 }

-declare void @runtime.slicePanic(ptr) #1
+declare void @runtime.slicePanic(ptr) #2

 ; Function Attrs: nounwind
-define hidden { ptr, i32, i32 } @main.makeInt16Slice(i32 %len, ptr %context) unnamed_addr #2 {
+define hidden { ptr, i32, i32 } @main.makeInt16Slice(i32 %len, ptr %context) unnamed_addr #1 {
 entry:
  %stackalloc = alloca i8, align 1
  %slice.maxcap = icmp slt i32 %len, 0
@@ -123,11 +124,11 @@ entry:

 slice.next:                                       ; preds = %entry
  %makeslice.cap = shl nuw i32 %len, 1
-  %makeslice.buf = call ptr @runtime.alloc(i32 %makeslice.cap, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #3
+  %makeslice.buf = call align 2 ptr @runtime.alloc(i32 %makeslice.cap, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #3
  %0 = insertvalue { ptr, i32, i32 } undef, ptr %makeslice.buf, 0
  %1 = insertvalue { ptr, i32, i32 } %0, i32 %len, 1
  %2 = insertvalue { ptr, i32, i32 } %1, i32 %len, 2
-  call void @runtime.trackPointer(ptr nonnull %makeslice.buf, ptr nonnull %stackalloc, ptr undef) #3
+  call void @runtime.trackPointer(ptr nonnull %makeslice.buf, ptr nonnull %stackalloc, ptr undef)
  ret { ptr, i32, i32 } %2

 slice.throw:                                      ; preds = %entry
@@ -136,7 +137,7 @@ slice.throw:                                      ; preds = %entry
 }

 ; Function Attrs: nounwind
-define hidden { ptr, i32, i32 } @main.makeArraySlice(i32 %len, ptr %context) unnamed_addr #2 {
+define hidden { ptr, i32, i32 } @main.makeArraySlice(i32 %len, ptr %context) unnamed_addr #1 {
 entry:
  %stackalloc = alloca i8, align 1
  %slice.maxcap = icmp ugt i32 %len, 1431655765
@@ -144,11 +145,11 @@ entry:

 slice.next:                                       ; preds = %entry
  %makeslice.cap = mul i32 %len, 3
-  %makeslice.buf = call ptr @runtime.alloc(i32 %makeslice.cap, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #3
+  %makeslice.buf = call align 1 ptr @runtime.alloc(i32 %makeslice.cap, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #3
  %0 = insertvalue { ptr, i32, i32 } undef, ptr %makeslice.buf, 0
  %1 = insertvalue { ptr, i32, i32 } %0, i32 %len, 1
  %2 = insertvalue { ptr, i32, i32 } %1, i32 %len, 2
-  call void @runtime.trackPointer(ptr nonnull %makeslice.buf, ptr nonnull %stackalloc, ptr undef) #3
+  call void @runtime.trackPointer(ptr nonnull %makeslice.buf, ptr nonnull %stackalloc, ptr undef)
  ret { ptr, i32, i32 } %2

 slice.throw:                                      ; preds = %entry
@@ -157,7 +158,7 @@ slice.throw:                                      ; preds = %entry
 }

 ; Function Attrs: nounwind
-define hidden { ptr, i32, i32 } @main.makeInt32Slice(i32 %len, ptr %context) unnamed_addr #2 {
+define hidden { ptr, i32, i32 } @main.makeInt32Slice(i32 %len, ptr %context) unnamed_addr #1 {
 entry:
  %stackalloc = alloca i8, align 1
  %slice.maxcap = icmp ugt i32 %len, 1073741823
@@ -165,11 +166,11 @@ entry:

 slice.next:                                       ; preds = %entry
  %makeslice.cap = shl nuw i32 %len, 2
-  %makeslice.buf = call ptr @runtime.alloc(i32 %makeslice.cap, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #3
+  %makeslice.buf = call align 4 ptr @runtime.alloc(i32 %makeslice.cap, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #3
  %0 = insertvalue { ptr, i32, i32 } undef, ptr %makeslice.buf, 0
  %1 = insertvalue { ptr, i32, i32 } %0, i32 %len, 1
  %2 = insertvalue { ptr, i32, i32 } %1, i32 %len, 2
-  call void @runtime.trackPointer(ptr nonnull %makeslice.buf, ptr nonnull %stackalloc, ptr undef) #3
+  call void @runtime.trackPointer(ptr nonnull %makeslice.buf, ptr nonnull %stackalloc, ptr undef)
  ret { ptr, i32, i32 } %2

 slice.throw:                                      ; preds = %entry
@@ -178,26 +179,26 @@ slice.throw:                                      ; preds = %entry
 }

 ; Function Attrs: nounwind
-define hidden ptr @main.Add32(ptr %p, i32 %len, ptr %context) unnamed_addr #2 {
+define hidden ptr @main.Add32(ptr %p, i32 %len, ptr %context) unnamed_addr #1 {
 entry:
  %stackalloc = alloca i8, align 1
  %0 = getelementptr i8, ptr %p, i32 %len
-  call void @runtime.trackPointer(ptr %0, ptr nonnull %stackalloc, ptr undef) #3
+  call void @runtime.trackPointer(ptr %0, ptr nonnull %stackalloc, ptr undef)
  ret ptr %0
 }

 ; Function Attrs: nounwind
-define hidden ptr @main.Add64(ptr %p, i64 %len, ptr %context) unnamed_addr #2 {
+define hidden ptr @main.Add64(ptr %p, i64 %len, ptr %context) unnamed_addr #1 {
 entry:
  %stackalloc = alloca i8, align 1
  %0 = trunc i64 %len to i32
  %1 = getelementptr i8, ptr %p, i32 %0
-  call void @runtime.trackPointer(ptr %1, ptr nonnull %stackalloc, ptr undef) #3
+  call void @runtime.trackPointer(ptr %1, ptr nonnull %stackalloc, ptr undef)
  ret ptr %1
 }

 ; Function Attrs: nounwind
-define hidden ptr @main.SliceToArray(ptr %s.data, i32 %s.len, i32 %s.cap, ptr %context) unnamed_addr #2 {
+define hidden ptr @main.SliceToArray(ptr %s.data, i32 %s.len, i32 %s.cap, ptr %context) unnamed_addr #1 {
 entry:
  %0 = icmp ult i32 %s.len, 4
  br i1 %0, label %slicetoarray.throw, label %slicetoarray.next
@@ -210,14 +211,14 @@ slicetoarray.throw:                               ; preds = %entry
  unreachable
 }

-declare void @runtime.sliceToArrayPointerPanic(ptr) #1
+declare void @runtime.sliceToArrayPointerPanic(ptr) #2

 ; Function Attrs: nounwind
-define hidden ptr @main.SliceToArrayConst(ptr %context) unnamed_addr #2 {
+define hidden ptr @main.SliceToArrayConst(ptr %context) unnamed_addr #1 {
 entry:
  %stackalloc = alloca i8, align 1
-  %makeslice = call dereferenceable(24) ptr @runtime.alloc(i32 24, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #3
-  call void @runtime.trackPointer(ptr nonnull %makeslice, ptr nonnull %stackalloc, ptr undef) #3
+  %makeslice = call align 4 dereferenceable(24) ptr @runtime.alloc(i32 24, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #3
+  call void @runtime.trackPointer(ptr nonnull %makeslice, ptr nonnull %stackalloc, ptr undef)
  br i1 false, label %slicetoarray.throw, label %slicetoarray.next

 slicetoarray.next:                                ; preds = %entry
@@ -228,7 +229,7 @@ slicetoarray.throw:                               ; preds = %entry
 }

 ; Function Attrs: nounwind
-define hidden { ptr, i32, i32 } @main.SliceInt(ptr dereferenceable_or_null(4) %ptr, i32 %len, ptr %context) unnamed_addr #2 {
+define hidden { ptr, i32, i32 } @main.SliceInt(ptr dereferenceable_or_null(4) %ptr, i32 %len, ptr %context) unnamed_addr #1 {
 entry:
  %stackalloc = alloca i8, align 1
  %0 = icmp ugt i32 %len, 1073741823
@@ -242,7 +243,7 @@ unsafe.Slice.next:                                ; preds = %entry
  %5 = insertvalue { ptr, i32, i32 } undef, ptr %ptr, 0
  %6 = insertvalue { ptr, i32, i32 } %5, i32 %len, 1
  %7 = insertvalue { ptr, i32, i32 } %6, i32 %len, 2
-  call void @runtime.trackPointer(ptr %ptr, ptr nonnull %stackalloc, ptr undef) #3
+  call void @runtime.trackPointer(ptr %ptr, ptr nonnull %stackalloc, ptr undef)
  ret { ptr, i32, i32 } %7

 unsafe.Slice.throw:                               ; preds = %entry
@@ -250,10 +251,10 @@ unsafe.Slice.throw:                               ; preds = %entry
  unreachable
 }

-declare void @runtime.unsafeSlicePanic(ptr) #1
+declare void @runtime.unsafeSlicePanic(ptr) #2

 ; Function Attrs: nounwind
-define hidden { ptr, i32, i32 } @main.SliceUint16(ptr dereferenceable_or_null(1) %ptr, i16 %len, ptr %context) unnamed_addr #2 {
+define hidden { ptr, i32, i32 } @main.SliceUint16(ptr dereferenceable_or_null(1) %ptr, i16 %len, ptr %context) unnamed_addr #1 {
 entry:
  %stackalloc = alloca i8, align 1
  %0 = icmp eq ptr %ptr, null
@@ -266,7 +267,7 @@ unsafe.Slice.next:                                ; preds = %entry
  %4 = insertvalue { ptr, i32, i32 } undef, ptr %ptr, 0
  %5 = insertvalue { ptr, i32, i32 } %4, i32 %3, 1
  %6 = insertvalue { ptr, i32, i32 } %5, i32 %3, 2
-  call void @runtime.trackPointer(ptr %ptr, ptr nonnull %stackalloc, ptr undef) #3
+  call void @runtime.trackPointer(ptr %ptr, ptr nonnull %stackalloc, ptr undef)
  ret { ptr, i32, i32 } %6

 unsafe.Slice.throw:                               ; preds = %entry
@@ -275,7 +276,7 @@ unsafe.Slice.throw:                               ; preds = %entry
 }

 ; Function Attrs: nounwind
-define hidden { ptr, i32, i32 } @main.SliceUint64(ptr dereferenceable_or_null(4) %ptr, i64 %len, ptr %context) unnamed_addr #2 {
+define hidden { ptr, i32, i32 } @main.SliceUint64(ptr dereferenceable_or_null(4) %ptr, i64 %len, ptr %context) unnamed_addr #1 {
 entry:
  %stackalloc = alloca i8, align 1
  %0 = icmp ugt i64 %len, 1073741823
@@ -290,7 +291,7 @@ unsafe.Slice.next:                                ; preds = %entry
  %6 = insertvalue { ptr, i32, i32 } undef, ptr %ptr, 0
  %7 = insertvalue { ptr, i32, i32 } %6, i32 %5, 1
  %8 = insertvalue { ptr, i32, i32 } %7, i32 %5, 2
-  call void @runtime.trackPointer(ptr %ptr, ptr nonnull %stackalloc, ptr undef) #3
+  call void @runtime.trackPointer(ptr %ptr, ptr nonnull %stackalloc, ptr undef)
  ret { ptr, i32, i32 } %8

 unsafe.Slice.throw:                               ; preds = %entry
@@ -299,7 +300,7 @@ unsafe.Slice.throw:                               ; preds = %entry
 }

 ; Function Attrs: nounwind
-define hidden { ptr, i32, i32 } @main.SliceInt64(ptr dereferenceable_or_null(4) %ptr, i64 %len, ptr %context) unnamed_addr #2 {
+define hidden { ptr, i32, i32 } @main.SliceInt64(ptr dereferenceable_or_null(4) %ptr, i64 %len, ptr %context) unnamed_addr #1 {
 entry:
  %stackalloc = alloca i8, align 1
  %0 = icmp ugt i64 %len, 1073741823
@@ -314,7 +315,7 @@ unsafe.Slice.next:                                ; preds = %entry
  %6 = insertvalue { ptr, i32, i32 } undef, ptr %ptr, 0
  %7 = insertvalue { ptr, i32, i32 } %6, i32 %5, 1
  %8 = insertvalue { ptr, i32, i32 } %7, i32 %5, 2
-  call void @runtime.trackPointer(ptr %ptr, ptr nonnull %stackalloc, ptr undef) #3
+  call void @runtime.trackPointer(ptr %ptr, ptr nonnull %stackalloc, ptr undef)
  ret { ptr, i32, i32 } %8

 unsafe.Slice.throw:                               ; preds = %entry
@@ -322,7 +323,7 @@ unsafe.Slice.throw:                               ; preds = %entry
  unreachable
 }

-attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
-attributes #1 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
-attributes #2 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
+attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
+attributes #1 = { nounwind "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
+attributes #2 = { "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
 attributes #3 = { nounwind }
@@ -10,34 +10,35 @@ target triple = "wasm32-unknown-wasi"
 ; Function Attrs: allockind("alloc,zeroed") allocsize(0)
 declare noalias nonnull ptr @runtime.alloc(i32, ptr, ptr) #0

+; Function Attrs: nounwind
 declare void @runtime.trackPointer(ptr nocapture readonly, ptr, ptr) #1

 ; Function Attrs: nounwind
-define hidden void @main.init(ptr %context) unnamed_addr #2 {
+define hidden void @main.init(ptr %context) unnamed_addr #1 {
 entry:
  ret void
 }

 ; Function Attrs: nounwind
-define hidden %runtime._string @main.someString(ptr %context) unnamed_addr #2 {
+define hidden %runtime._string @main.someString(ptr %context) unnamed_addr #1 {
 entry:
  ret %runtime._string { ptr @"main$string", i32 3 }
 }

 ; Function Attrs: nounwind
-define hidden %runtime._string @main.zeroLengthString(ptr %context) unnamed_addr #2 {
+define hidden %runtime._string @main.zeroLengthString(ptr %context) unnamed_addr #1 {
 entry:
  ret %runtime._string zeroinitializer
 }

 ; Function Attrs: nounwind
-define hidden i32 @main.stringLen(ptr %s.data, i32 %s.len, ptr %context) unnamed_addr #2 {
+define hidden i32 @main.stringLen(ptr %s.data, i32 %s.len, ptr %context) unnamed_addr #1 {
 entry:
  ret i32 %s.len
 }

 ; Function Attrs: nounwind
-define hidden i8 @main.stringIndex(ptr %s.data, i32 %s.len, i32 %index, ptr %context) unnamed_addr #2 {
+define hidden i8 @main.stringIndex(ptr %s.data, i32 %s.len, i32 %index, ptr %context) unnamed_addr #1 {
 entry:
  %.not = icmp ult i32 %index, %s.len
  br i1 %.not, label %lookup.next, label %lookup.throw
@@ -52,19 +53,19 @@ lookup.throw:                                     ; preds = %entry
  unreachable
 }

-declare void @runtime.lookupPanic(ptr) #1
+declare void @runtime.lookupPanic(ptr) #2

 ; Function Attrs: nounwind
-define hidden i1 @main.stringCompareEqual(ptr %s1.data, i32 %s1.len, ptr %s2.data, i32 %s2.len, ptr %context) unnamed_addr #2 {
+define hidden i1 @main.stringCompareEqual(ptr %s1.data, i32 %s1.len, ptr %s2.data, i32 %s2.len, ptr %context) unnamed_addr #1 {
 entry:
  %0 = call i1 @runtime.stringEqual(ptr %s1.data, i32 %s1.len, ptr %s2.data, i32 %s2.len, ptr undef) #3
  ret i1 %0
 }

-declare i1 @runtime.stringEqual(ptr, i32, ptr, i32, ptr) #1
+declare i1 @runtime.stringEqual(ptr, i32, ptr, i32, ptr) #2

 ; Function Attrs: nounwind
-define hidden i1 @main.stringCompareUnequal(ptr %s1.data, i32 %s1.len, ptr %s2.data, i32 %s2.len, ptr %context) unnamed_addr #2 {
+define hidden i1 @main.stringCompareUnequal(ptr %s1.data, i32 %s1.len, ptr %s2.data, i32 %s2.len, ptr %context) unnamed_addr #1 {
 entry:
  %0 = call i1 @runtime.stringEqual(ptr %s1.data, i32 %s1.len, ptr %s2.data, i32 %s2.len, ptr undef) #3
  %1 = xor i1 %0, true
@@ -72,16 +73,16 @@ entry:
 }

 ; Function Attrs: nounwind
-define hidden i1 @main.stringCompareLarger(ptr %s1.data, i32 %s1.len, ptr %s2.data, i32 %s2.len, ptr %context) unnamed_addr #2 {
+define hidden i1 @main.stringCompareLarger(ptr %s1.data, i32 %s1.len, ptr %s2.data, i32 %s2.len, ptr %context) unnamed_addr #1 {
 entry:
  %0 = call i1 @runtime.stringLess(ptr %s2.data, i32 %s2.len, ptr %s1.data, i32 %s1.len, ptr undef) #3
  ret i1 %0
 }

-declare i1 @runtime.stringLess(ptr, i32, ptr, i32, ptr) #1
+declare i1 @runtime.stringLess(ptr, i32, ptr, i32, ptr) #2

 ; Function Attrs: nounwind
-define hidden i8 @main.stringLookup(ptr %s.data, i32 %s.len, i8 %x, ptr %context) unnamed_addr #2 {
+define hidden i8 @main.stringLookup(ptr %s.data, i32 %s.len, i8 %x, ptr %context) unnamed_addr #1 {
 entry:
  %0 = zext i8 %x to i32
  %.not = icmp ult i32 %0, %s.len
@@ -97,7 +98,7 @@ lookup.throw:                                     ; preds = %entry
  unreachable
 }

-attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
-attributes #1 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
-attributes #2 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
+attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
+attributes #1 = { nounwind "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
+attributes #2 = { "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
 attributes #3 = { nounwind }
@@ -8,16 +8,17 @@ target triple = "wasm32-unknown-wasi"
 ; Function Attrs: allockind("alloc,zeroed") allocsize(0)
 declare noalias nonnull ptr @runtime.alloc(i32, ptr, ptr) #0

+; Function Attrs: nounwind
 declare void @runtime.trackPointer(ptr nocapture readonly, ptr, ptr) #1

 ; Function Attrs: nounwind
-define hidden void @main.init(ptr %context) unnamed_addr #2 {
+define hidden void @main.init(ptr %context) unnamed_addr #1 {
 entry:
  ret void
 }

 ; Function Attrs: noinline nounwind
-define hidden i32 @main.testZeroGet(ptr dereferenceable_or_null(40) %m, i1 %s.b1, i32 %s.i, i1 %s.b2, ptr %context) unnamed_addr #3 {
+define hidden i32 @main.testZeroGet(ptr dereferenceable_or_null(40) %m, i1 %s.b1, i32 %s.i, i1 %s.b2, ptr %context) unnamed_addr #2 {
 entry:
  %hashmap.key = alloca %main.hasPadding, align 8
  %hashmap.value = alloca i32, align 4
@@ -39,17 +40,17 @@ entry:
 }

 ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
-declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #4
+declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #3

-declare void @runtime.memzero(ptr, i32, ptr) #1
+declare void @runtime.memzero(ptr, i32, ptr) #4

-declare i1 @runtime.hashmapBinaryGet(ptr dereferenceable_or_null(40), ptr, ptr, i32, ptr) #1
+declare i1 @runtime.hashmapBinaryGet(ptr dereferenceable_or_null(40), ptr, ptr, i32, ptr) #4

 ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
-declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #4
+declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #3

 ; Function Attrs: noinline nounwind
-define hidden void @main.testZeroSet(ptr dereferenceable_or_null(40) %m, i1 %s.b1, i32 %s.i, i1 %s.b2, ptr %context) unnamed_addr #3 {
+define hidden void @main.testZeroSet(ptr dereferenceable_or_null(40) %m, i1 %s.b1, i32 %s.i, i1 %s.b2, ptr %context) unnamed_addr #2 {
 entry:
  %hashmap.key = alloca %main.hasPadding, align 8
  %hashmap.value = alloca i32, align 4
@@ -70,10 +71,10 @@ entry:
  ret void
 }

-declare void @runtime.hashmapBinarySet(ptr dereferenceable_or_null(40), ptr, ptr, ptr) #1
+declare void @runtime.hashmapBinarySet(ptr dereferenceable_or_null(40), ptr, ptr, ptr) #4

 ; Function Attrs: noinline nounwind
-define hidden i32 @main.testZeroArrayGet(ptr dereferenceable_or_null(40) %m, [2 x %main.hasPadding] %s, ptr %context) unnamed_addr #3 {
+define hidden i32 @main.testZeroArrayGet(ptr dereferenceable_or_null(40) %m, [2 x %main.hasPadding] %s, ptr %context) unnamed_addr #2 {
 entry:
  %hashmap.key = alloca [2 x %main.hasPadding], align 8
  %hashmap.value = alloca i32, align 4
@@ -100,7 +101,7 @@ entry:
 }

 ; Function Attrs: noinline nounwind
-define hidden void @main.testZeroArraySet(ptr dereferenceable_or_null(40) %m, [2 x %main.hasPadding] %s, ptr %context) unnamed_addr #3 {
+define hidden void @main.testZeroArraySet(ptr dereferenceable_or_null(40) %m, [2 x %main.hasPadding] %s, ptr %context) unnamed_addr #2 {
 entry:
  %hashmap.key = alloca [2 x %main.hasPadding], align 8
  %hashmap.value = alloca i32, align 4
@@ -127,14 +128,14 @@ entry:
 }

 ; Function Attrs: nounwind
-define hidden void @main.main(ptr %context) unnamed_addr #2 {
+define hidden void @main.main(ptr %context) unnamed_addr #1 {
 entry:
  ret void
 }

-attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
-attributes #1 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
-attributes #2 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
-attributes #3 = { noinline nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
-attributes #4 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
+attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
+attributes #1 = { nounwind "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
+attributes #2 = { noinline nounwind "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
+attributes #3 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
+attributes #4 = { "target-features"="+bulk-memory,+exception-handling,+mutable-globals,+nontrapping-fptoint,+sign-ext" }
 attributes #5 = { nounwind }
@@ -0,0 +1,212 @@
+// Package diagnostics formats compiler errors and prints them in a consistent
+// way.
+package diagnostics
+
+import (
+	"bytes"
+	"fmt"
+	"go/scanner"
+	"go/token"
+	"go/types"
+	"io"
+	"path/filepath"
+	"sort"
+	"strings"
+
+	"github.com/tinygo-org/tinygo/builder"
+	"github.com/tinygo-org/tinygo/goenv"
+	"github.com/tinygo-org/tinygo/interp"
+	"github.com/tinygo-org/tinygo/loader"
+)
+
+// A single diagnostic.
+type Diagnostic struct {
+	Pos token.Position
+	Msg string
+}
+
+// One or multiple errors of a particular package.
+// It can also represent whole-program errors (like linker errors) that can't
+// easily be connected to a single package.
+type PackageDiagnostic struct {
+	ImportPath  string // the same ImportPath as in `go list -json`
+	Diagnostics []Diagnostic
+}
+
+// Diagnostics of a whole program. This can include errors belonging to multiple
+// packages, or just a single package.
+type ProgramDiagnostic []PackageDiagnostic
+
+// CreateDiagnostics reads the underlying errors in the error object and creates
+// a set of diagnostics that's sorted and can be readily printed.
+func CreateDiagnostics(err error) ProgramDiagnostic {
+	if err == nil {
+		return nil
+	}
+	// Right now, the compiler will only show errors for the first package that
+	// fails to build. This is likely to change in the future.
+	return ProgramDiagnostic{
+		createPackageDiagnostic(err),
+	}
+}
+
+// Create diagnostics for a single package (though, in practice, it may also be
+// used for whole-program diagnostics in some cases).
+func createPackageDiagnostic(err error) PackageDiagnostic {
+	// Extract diagnostics for this package.
+	var pkgDiag PackageDiagnostic
+	switch err := err.(type) {
+	case *builder.MultiError:
+		if err.ImportPath != "" {
+			pkgDiag.ImportPath = err.ImportPath
+		}
+		for _, err := range err.Errs {
+			diags := createDiagnostics(err)
+			pkgDiag.Diagnostics = append(pkgDiag.Diagnostics, diags...)
+		}
+	case loader.Errors:
+		if err.Pkg != nil {
+			pkgDiag.ImportPath = err.Pkg.ImportPath
+		}
+		for _, err := range err.Errs {
+			diags := createDiagnostics(err)
+			pkgDiag.Diagnostics = append(pkgDiag.Diagnostics, diags...)
+		}
+	case *interp.Error:
+		pkgDiag.ImportPath = err.ImportPath
+		w := &bytes.Buffer{}
+		fmt.Fprintln(w, err.Error())
+		if len(err.Inst) != 0 {
+			fmt.Fprintln(w, err.Inst)
+		}
+		if len(err.Traceback) > 0 {
+			fmt.Fprintln(w, "\ntraceback:")
+			for _, line := range err.Traceback {
+				fmt.Fprintln(w, line.Pos.String()+":")
+				fmt.Fprintln(w, line.Inst)
+			}
+		}
+		pkgDiag.Diagnostics = append(pkgDiag.Diagnostics, Diagnostic{
+			Msg: w.String(),
+		})
+	default:
+		pkgDiag.Diagnostics = createDiagnostics(err)
+	}
+
+	// Sort these diagnostics by file/line/column.
+	sort.SliceStable(pkgDiag.Diagnostics, func(i, j int) bool {
+		posI := pkgDiag.Diagnostics[i].Pos
+		posJ := pkgDiag.Diagnostics[j].Pos
+		if posI.Filename != posJ.Filename {
+			return posI.Filename < posJ.Filename
+		}
+		if posI.Line != posJ.Line {
+			return posI.Line < posJ.Line
+		}
+		return posI.Column < posJ.Column
+	})
+
+	return pkgDiag
+}
+
+// Extract diagnostics from the given error message and return them as a slice
+// of errors (which in many cases will just be a single diagnostic).
+func createDiagnostics(err error) []Diagnostic {
+	switch err := err.(type) {
+	case types.Error:
+		return []Diagnostic{
+			{
+				Pos: err.Fset.Position(err.Pos),
+				Msg: err.Msg,
+			},
+		}
+	case scanner.Error:
+		return []Diagnostic{
+			{
+				Pos: err.Pos,
+				Msg: err.Msg,
+			},
+		}
+	case scanner.ErrorList:
+		var diags []Diagnostic
+		for _, err := range err {
+			diags = append(diags, createDiagnostics(*err)...)
+		}
+		return diags
+	case loader.Error:
+		if err.Err.Pos.Filename != "" {
+			// Probably a syntax error in a dependency.
+			return createDiagnostics(err.Err)
+		} else {
+			// Probably an "import cycle not allowed" error.
+			buf := &bytes.Buffer{}
+			fmt.Fprintln(buf, "package", err.ImportStack[0])
+			for i := 1; i < len(err.ImportStack); i++ {
+				pkgPath := err.ImportStack[i]
+				if i == len(err.ImportStack)-1 {
+					// last package
+					fmt.Fprintln(buf, "\timports", pkgPath+": "+err.Err.Error())
+				} else {
+					// not the last package
+					fmt.Fprintln(buf, "\timports", pkgPath)
+				}
+			}
+			return []Diagnostic{
+				{Msg: buf.String()},
+			}
+		}
+	default:
+		return []Diagnostic{
+			{Msg: err.Error()},
+		}
+	}
+}
+
+// Write program diagnostics to the given writer with 'wd' as the relative
+// working directory.
+func (progDiag ProgramDiagnostic) WriteTo(w io.Writer, wd string) {
+	for _, pkgDiag := range progDiag {
+		pkgDiag.WriteTo(w, wd)
+	}
+}
+
+// Write package diagnostics to the given writer with 'wd' as the relative
+// working directory.
+func (pkgDiag PackageDiagnostic) WriteTo(w io.Writer, wd string) {
+	if pkgDiag.ImportPath != "" {
+		fmt.Fprintln(w, "#", pkgDiag.ImportPath)
+	}
+	for _, diag := range pkgDiag.Diagnostics {
+		diag.WriteTo(w, wd)
+	}
+}
+
+// Write this diagnostic to the given writer with 'wd' as the relative working
+// directory.
+func (diag Diagnostic) WriteTo(w io.Writer, wd string) {
+	if diag.Pos == (token.Position{}) {
+		fmt.Fprintln(w, diag.Msg)
+		return
+	}
+	pos := diag.Pos // make a copy
+	if !strings.HasPrefix(pos.Filename, filepath.Join(goenv.Get("GOROOT"), "src")) && !strings.HasPrefix(pos.Filename, filepath.Join(goenv.Get("TINYGOROOT"), "src")) {
+		// This file is not from the standard library (either the GOROOT or the
+		// TINYGOROOT). Make the path relative, for easier reading.  Ignore any
+		// errors in the process (falling back to the absolute path).
+		pos.Filename = tryToMakePathRelative(pos.Filename, wd)
+	}
+	fmt.Fprintf(w, "%s: %s\n", pos, diag.Msg)
+}
+
+// try to make the path relative to the current working directory. If any error
+// occurs, this error is ignored and the absolute path is returned instead.
+func tryToMakePathRelative(dir, wd string) string {
+	if wd == "" {
+		return dir // working directory not found
+	}
+	relpath, err := filepath.Rel(wd, dir)
+	if err != nil {
+		return dir
+	}
+	return relpath
+}
@@ -0,0 +1,261 @@
+// Copyright 2022 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package main
+
+import (
+	"bytes"
+	"fmt"
+	"sort"
+	"strings"
+)
+
+// A pair is a pair of values tracked for both the x and y side of a diff.
+// It is typically a pair of line indexes.
+type pair struct{ x, y int }
+
+// Diff returns an anchored diff of the two texts old and new
+// in the “unified diff” format. If old and new are identical,
+// Diff returns a nil slice (no output).
+//
+// Unix diff implementations typically look for a diff with
+// the smallest number of lines inserted and removed,
+// which can in the worst case take time quadratic in the
+// number of lines in the texts. As a result, many implementations
+// either can be made to run for a long time or cut off the search
+// after a predetermined amount of work.
+//
+// In contrast, this implementation looks for a diff with the
+// smallest number of “unique” lines inserted and removed,
+// where unique means a line that appears just once in both old and new.
+// We call this an “anchored diff” because the unique lines anchor
+// the chosen matching regions. An anchored diff is usually clearer
+// than a standard diff, because the algorithm does not try to
+// reuse unrelated blank lines or closing braces.
+// The algorithm also guarantees to run in O(n log n) time
+// instead of the standard O(n²) time.
+//
+// Some systems call this approach a “patience diff,” named for
+// the “patience sorting” algorithm, itself named for a solitaire card game.
+// We avoid that name for two reasons. First, the name has been used
+// for a few different variants of the algorithm, so it is imprecise.
+// Second, the name is frequently interpreted as meaning that you have
+// to wait longer (to be patient) for the diff, meaning that it is a slower algorithm,
+// when in fact the algorithm is faster than the standard one.
+func Diff(oldName string, old []byte, newName string, new []byte) []byte {
+	if bytes.Equal(old, new) {
+		return nil
+	}
+	x := lines(old)
+	y := lines(new)
+
+	// Print diff header.
+	var out bytes.Buffer
+	fmt.Fprintf(&out, "diff %s %s\n", oldName, newName)
+	fmt.Fprintf(&out, "--- %s\n", oldName)
+	fmt.Fprintf(&out, "+++ %s\n", newName)
+
+	// Loop over matches to consider,
+	// expanding each match to include surrounding lines,
+	// and then printing diff chunks.
+	// To avoid setup/teardown cases outside the loop,
+	// tgs returns a leading {0,0} and trailing {len(x), len(y)} pair
+	// in the sequence of matches.
+	var (
+		done  pair     // printed up to x[:done.x] and y[:done.y]
+		chunk pair     // start lines of current chunk
+		count pair     // number of lines from each side in current chunk
+		ctext []string // lines for current chunk
+	)
+	for _, m := range tgs(x, y) {
+		if m.x < done.x {
+			// Already handled scanning forward from earlier match.
+			continue
+		}
+
+		// Expand matching lines as far as possible,
+		// establishing that x[start.x:end.x] == y[start.y:end.y].
+		// Note that on the first (or last) iteration we may (or definitely do)
+		// have an empty match: start.x==end.x and start.y==end.y.
+		start := m
+		for start.x > done.x && start.y > done.y && x[start.x-1] == y[start.y-1] {
+			start.x--
+			start.y--
+		}
+		end := m
+		for end.x < len(x) && end.y < len(y) && x[end.x] == y[end.y] {
+			end.x++
+			end.y++
+		}
+
+		// Emit the mismatched lines before start into this chunk.
+		// (No effect on first sentinel iteration, when start = {0,0}.)
+		for _, s := range x[done.x:start.x] {
+			ctext = append(ctext, "-"+s)
+			count.x++
+		}
+		for _, s := range y[done.y:start.y] {
+			ctext = append(ctext, "+"+s)
+			count.y++
+		}
+
+		// If we're not at EOF and have too few common lines,
+		// the chunk includes all the common lines and continues.
+		const C = 3 // number of context lines
+		if (end.x < len(x) || end.y < len(y)) &&
+			(end.x-start.x < C || (len(ctext) > 0 && end.x-start.x < 2*C)) {
+			for _, s := range x[start.x:end.x] {
+				ctext = append(ctext, " "+s)
+				count.x++
+				count.y++
+			}
+			done = end
+			continue
+		}
+
+		// End chunk with common lines for context.
+		if len(ctext) > 0 {
+			n := end.x - start.x
+			if n > C {
+				n = C
+			}
+			for _, s := range x[start.x : start.x+n] {
+				ctext = append(ctext, " "+s)
+				count.x++
+				count.y++
+			}
+			done = pair{start.x + n, start.y + n}
+
+			// Format and emit chunk.
+			// Convert line numbers to 1-indexed.
+			// Special case: empty file shows up as 0,0 not 1,0.
+			if count.x > 0 {
+				chunk.x++
+			}
+			if count.y > 0 {
+				chunk.y++
+			}
+			fmt.Fprintf(&out, "@@ -%d,%d +%d,%d @@\n", chunk.x, count.x, chunk.y, count.y)
+			for _, s := range ctext {
+				out.WriteString(s)
+			}
+			count.x = 0
+			count.y = 0
+			ctext = ctext[:0]
+		}
+
+		// If we reached EOF, we're done.
+		if end.x >= len(x) && end.y >= len(y) {
+			break
+		}
+
+		// Otherwise start a new chunk.
+		chunk = pair{end.x - C, end.y - C}
+		for _, s := range x[chunk.x:end.x] {
+			ctext = append(ctext, " "+s)
+			count.x++
+			count.y++
+		}
+		done = end
+	}
+
+	return out.Bytes()
+}
+
+// lines returns the lines in the file x, including newlines.
+// If the file does not end in a newline, one is supplied
+// along with a warning about the missing newline.
+func lines(x []byte) []string {
+	l := strings.SplitAfter(string(x), "\n")
+	if l[len(l)-1] == "" {
+		l = l[:len(l)-1]
+	} else {
+		// Treat last line as having a message about the missing newline attached,
+		// using the same text as BSD/GNU diff (including the leading backslash).
+		l[len(l)-1] += "\n\\ No newline at end of file\n"
+	}
+	return l
+}
+
+// tgs returns the pairs of indexes of the longest common subsequence
+// of unique lines in x and y, where a unique line is one that appears
+// once in x and once in y.
+//
+// The longest common subsequence algorithm is as described in
+// Thomas G. Szymanski, “A Special Case of the Maximal Common
+// Subsequence Problem,” Princeton TR #170 (January 1975),
+// available at https://research.swtch.com/tgs170.pdf.
+func tgs(x, y []string) []pair {
+	// Count the number of times each string appears in a and b.
+	// We only care about 0, 1, many, counted as 0, -1, -2
+	// for the x side and 0, -4, -8 for the y side.
+	// Using negative numbers now lets us distinguish positive line numbers later.
+	m := make(map[string]int)
+	for _, s := range x {
+		if c := m[s]; c > -2 {
+			m[s] = c - 1
+		}
+	}
+	for _, s := range y {
+		if c := m[s]; c > -8 {
+			m[s] = c - 4
+		}
+	}
+
+	// Now unique strings can be identified by m[s] = -1+-4.
+	//
+	// Gather the indexes of those strings in x and y, building:
+	//	xi[i] = increasing indexes of unique strings in x.
+	//	yi[i] = increasing indexes of unique strings in y.
+	//	inv[i] = index j such that x[xi[i]] = y[yi[j]].
+	var xi, yi, inv []int
+	for i, s := range y {
+		if m[s] == -1+-4 {
+			m[s] = len(yi)
+			yi = append(yi, i)
+		}
+	}
+	for i, s := range x {
+		if j, ok := m[s]; ok && j >= 0 {
+			xi = append(xi, i)
+			inv = append(inv, j)
+		}
+	}
+
+	// Apply Algorithm A from Szymanski's paper.
+	// In those terms, A = J = inv and B = [0, n).
+	// We add sentinel pairs {0,0}, and {len(x),len(y)}
+	// to the returned sequence, to help the processing loop.
+	J := inv
+	n := len(xi)
+	T := make([]int, n)
+	L := make([]int, n)
+	for i := range T {
+		T[i] = n + 1
+	}
+	for i := 0; i < n; i++ {
+		k := sort.Search(n, func(k int) bool {
+			return T[k] >= J[i]
+		})
+		T[k] = J[i]
+		L[i] = k + 1
+	}
+	k := 0
+	for _, v := range L {
+		if k < v {
+			k = v
+		}
+	}
+	seq := make([]pair, 2+k)
+	seq[1+k] = pair{len(x), len(y)} // sentinel at end
+	lastj := n
+	for i := n - 1; i >= 0; i-- {
+		if L[i] == k && J[i] < lastj {
+			seq[k] = pair{xi[i], yi[J[i]]}
+			k--
+		}
+	}
+	seq[0] = pair{0, 0} // sentinel at start
+	return seq
+}
@@ -0,0 +1,137 @@
+package main
+
+import (
+	"bytes"
+	"os"
+	"path/filepath"
+	"regexp"
+	"strings"
+	"testing"
+
+	"github.com/tinygo-org/tinygo/compileopts"
+	"github.com/tinygo-org/tinygo/diagnostics"
+)
+
+// Test the error messages of the TinyGo compiler.
+func TestErrors(t *testing.T) {
+	// TODO: nicely formatted error messages for:
+	//   - duplicate symbols in ld.lld (currently only prints bitcode file)
+	type errorTest struct {
+		name   string
+		target string
+	}
+	for _, tc := range []errorTest{
+		{name: "cgo"},
+		{name: "compiler"},
+		{name: "interp"},
+		{name: "linker-flashoverflow", target: "cortex-m-qemu"},
+		{name: "linker-ramoverflow", target: "cortex-m-qemu"},
+		{name: "linker-undefined", target: "darwin/arm64"},
+		{name: "linker-undefined", target: "linux/amd64"},
+		//{name: "linker-undefined", target: "windows/amd64"}, // TODO: no source location
+		{name: "linker-undefined", target: "cortex-m-qemu"},
+		//{name: "linker-undefined", target: "wasip1"}, // TODO: no source location
+		{name: "loader-importcycle"},
+		{name: "loader-invaliddep"},
+		{name: "loader-invalidpackage"},
+		{name: "loader-nopackage"},
+		{name: "optimizer"},
+		{name: "syntax"},
+		{name: "types"},
+	} {
+		name := tc.name
+		if tc.target != "" {
+			name += "#" + tc.target
+		}
+		target := tc.target
+		if target == "" {
+			target = "wasip1"
+		}
+		t.Run(name, func(t *testing.T) {
+			options := optionsFromTarget(target, sema)
+			testErrorMessages(t, "./testdata/errors/"+tc.name+".go", &options)
+		})
+	}
+}
+
+func testErrorMessages(t *testing.T, filename string, options *compileopts.Options) {
+	t.Parallel()
+
+	// Parse expected error messages.
+	expected := readErrorMessages(t, filename)
+
+	// Try to build a binary (this should fail with an error).
+	tmpdir := t.TempDir()
+	err := Build(filename, tmpdir+"/out", options)
+	if err == nil {
+		t.Fatal("expected to get a compiler error")
+	}
+
+	// Get the full ./testdata/errors directory.
+	wd, absErr := filepath.Abs("testdata/errors")
+	if absErr != nil {
+		t.Fatal(absErr)
+	}
+
+	// Write error message out as plain text.
+	var buf bytes.Buffer
+	diagnostics.CreateDiagnostics(err).WriteTo(&buf, wd)
+	actual := strings.TrimRight(buf.String(), "\n")
+
+	// Check whether the error is as expected.
+	if !matchErrors(t, expected, actual) {
+		t.Errorf("expected error:\n%s\ngot:\n%s", indentText(expected, "> "), indentText(actual, "> "))
+	}
+}
+
+func matchErrors(t *testing.T, pattern, actual string) bool {
+	patternLines := strings.Split(pattern, "\n")
+	actualLines := strings.Split(actual, "\n")
+	if len(patternLines) != len(actualLines) {
+		return false
+	}
+	for i, patternLine := range patternLines {
+		indices := regexp.MustCompile(`\{\{.*?\}\}`).FindAllStringIndex(patternLine, -1)
+		patternParts := []string{"^"}
+		lastStop := 0
+		for _, startstop := range indices {
+			start := startstop[0]
+			stop := startstop[1]
+			patternParts = append(patternParts,
+				regexp.QuoteMeta(patternLine[lastStop:start]),
+				patternLine[start+2:stop-2])
+			lastStop = stop
+		}
+		patternParts = append(patternParts, regexp.QuoteMeta(patternLine[lastStop:]), "$")
+		pattern := strings.Join(patternParts, "")
+		re, err := regexp.Compile(pattern)
+		if err != nil {
+			t.Fatalf("could not compile regexp for %#v: %v", patternLine, err)
+		}
+		if !re.MatchString(actualLines[i]) {
+			return false
+		}
+	}
+	return true
+}
+
+// Indent the given text with a given indentation string.
+func indentText(text, indent string) string {
+	return indent + strings.ReplaceAll(text, "\n", "\n"+indent)
+}
+
+// Read "// ERROR:" prefixed messages from the given file.
+func readErrorMessages(t *testing.T, file string) string {
+	data, err := os.ReadFile(file)
+	if err != nil {
+		t.Fatal("could not read input file:", err)
+	}
+
+	var errors []string
+	for _, line := range strings.Split(string(data), "\n") {
+		if strings.HasPrefix(line, "// ERROR: ") {
+			errors = append(errors, strings.TrimRight(line[len("// ERROR: "):], "\r\n"))
+		}
+	}
+	return strings.Join(errors, "\n")
+}
@@ -1,47 +1,36 @@
 module github.com/tinygo-org/tinygo

-go 1.18
+go 1.19

 require (
 	github.com/aykevl/go-wasm v0.0.2-0.20240312204833-50275154210c
 	github.com/blakesmith/ar v0.0.0-20150311145944-8bd4349a67f2
 	github.com/chromedp/cdproto v0.0.0-20220113222801-0725d94bb6ee
 	github.com/chromedp/chromedp v0.7.6
-	github.com/client9/misspell v0.3.4
 	github.com/gofrs/flock v0.8.1
 	github.com/google/shlex v0.0.0-20181106134648-c34317bd91bf
 	github.com/inhies/go-bytesize v0.0.0-20220417184213-4913239db9cf
 	github.com/marcinbor85/gohex v0.0.0-20200531091804-343a4b548892
 	github.com/mattn/go-colorable v0.1.13
 	github.com/mattn/go-tty v0.0.4
-	github.com/mgechev/revive v1.3.7
 	github.com/sigurn/crc16 v0.0.0-20211026045750-20ab5afb07e3
 	go.bug.st/serial v1.6.0
-	golang.org/x/net v0.20.0
-	golang.org/x/sys v0.16.0
-	golang.org/x/tools v0.17.0
+	golang.org/x/net v0.26.0
+	golang.org/x/sys v0.21.0
+	golang.org/x/tools v0.22.1-0.20240621165957-db513b091504
 	gopkg.in/yaml.v2 v2.4.0
-	tinygo.org/x/go-llvm v0.0.0-20240518103902-697964f2a9dc
+	tinygo.org/x/go-llvm v0.0.0-20240804145059-aaff3eb751f0
 )

 require (
-	github.com/BurntSushi/toml v1.3.2 // indirect
-	github.com/chavacava/garif v0.1.0 // indirect
 	github.com/chromedp/sysutil v1.0.0 // indirect
 	github.com/creack/goselect v0.1.2 // indirect
-	github.com/fatih/color v1.16.0 // indirect
-	github.com/fatih/structtag v1.2.0 // indirect
 	github.com/gobwas/httphead v0.1.0 // indirect
 	github.com/gobwas/pool v0.2.1 // indirect
 	github.com/gobwas/ws v1.1.0 // indirect
 	github.com/josharian/intern v1.0.0 // indirect
 	github.com/mailru/easyjson v0.7.7 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
-	github.com/mattn/go-runewidth v0.0.9 // indirect
-	github.com/mgechev/dots v0.0.0-20210922191527-e955255bf517 // indirect
-	github.com/mitchellh/go-homedir v1.1.0 // indirect
-	github.com/olekukonko/tablewriter v0.0.5 // indirect
-	github.com/pkg/errors v0.9.1 // indirect
-	github.com/spf13/afero v1.11.0 // indirect
-	golang.org/x/text v0.14.0 // indirect
+	github.com/stretchr/testify v1.8.4 // indirect
+	golang.org/x/text v0.16.0 // indirect
 )
@@ -1,11 +1,7 @@
-github.com/BurntSushi/toml v1.3.2 h1:o7IhLm0Msx3BaB+n3Ag7L8EVlByGnpq14C4YWiu/gL8=
-github.com/BurntSushi/toml v1.3.2/go.mod h1:CxXYINrC8qIiEnFrOxCa7Jy5BFHlXnUU2pbicEuybxQ=
 github.com/aykevl/go-wasm v0.0.2-0.20240312204833-50275154210c h1:4T0Vj1UkGgcpkRrmn7SbokebnlfxJcMZPgWtOYACAAA=
 github.com/aykevl/go-wasm v0.0.2-0.20240312204833-50275154210c/go.mod h1:7sXyiaA0WtSogCu67R2252fQpVmJMh9JWJ9ddtGkpWw=
 github.com/blakesmith/ar v0.0.0-20150311145944-8bd4349a67f2 h1:oMCHnXa6CCCafdPDbMh/lWRhRByN0VFLvv+g+ayx1SI=
 github.com/blakesmith/ar v0.0.0-20150311145944-8bd4349a67f2/go.mod h1:PkYb9DJNAwrSvRx5DYA+gUcOIgTGVMNkfSCbZM8cWpI=
-github.com/chavacava/garif v0.1.0 h1:2JHa3hbYf5D9dsgseMKAmc/MZ109otzgNFk5s87H9Pc=
-github.com/chavacava/garif v0.1.0/go.mod h1:XMyYCkEL58DF0oyW4qDjjnPWONs2HBqYKI+UIPD+Gww=
 github.com/chromedp/cdproto v0.0.0-20211126220118-81fa0469ad77/go.mod h1:At5TxYYdxkbQL0TSefRjhLE3Q0lgvqKKMSFUglJ7i1U=
 github.com/chromedp/cdproto v0.0.0-20220113222801-0725d94bb6ee h1:+SFdIVfQpG0s0DHYzou0kgfE0n0ZjKPwbiRJsXrZegU=
 github.com/chromedp/cdproto v0.0.0-20220113222801-0725d94bb6ee/go.mod h1:At5TxYYdxkbQL0TSefRjhLE3Q0lgvqKKMSFUglJ7i1U=
@@ -13,17 +9,10 @@ github.com/chromedp/chromedp v0.7.6 h1:2juGaktzjwULlsn+DnvIZXFUckEp5xs+GOBroaea+
 github.com/chromedp/chromedp v0.7.6/go.mod h1:ayT4YU/MGAALNfOg9gNrpGSAdnU51PMx+FCeuT1iXzo=
 github.com/chromedp/sysutil v1.0.0 h1:+ZxhTpfpZlmchB58ih/LBHX52ky7w2VhQVKQMucy3Ic=
 github.com/chromedp/sysutil v1.0.0/go.mod h1:kgWmDdq8fTzXYcKIBqIYvRRTnYb9aNS9moAV0xufSww=
-github.com/client9/misspell v0.3.4 h1:ta993UF76GwbvJcIo3Y68y/M3WxlpEHPWIGDkJYwzJI=
-github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
 github.com/creack/goselect v0.1.2 h1:2DNy14+JPjRBgPzAd1thbQp4BSIihxcBf0IXhQXDRa0=
 github.com/creack/goselect v0.1.2/go.mod h1:a/NhLweNvqIYMuxcMOuWY516Cimucms3DglDzQP3hKY=
-github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/fatih/color v1.16.0 h1:zmkK9Ngbjj+K0yRhTVONQh1p/HknKYSlNT+vZCzyokM=
-github.com/fatih/color v1.16.0/go.mod h1:fL2Sau1YI5c0pdGEVCbKQbLXB6edEj1ZgiY4NijnWvE=
-github.com/fatih/structtag v1.2.0 h1:/OdNE99OxoI/PqaW/SuSK9uxxT3f/tcSZgon/ssNSx4=
-github.com/fatih/structtag v1.2.0/go.mod h1:mBJUNpUnHmRKrKlQQlmCrh5PuhftFbNv8Ys4/aAZl94=
 github.com/gobwas/httphead v0.1.0 h1:exrUm0f4YX0L7EBwZHuCF4GDp8aJfVeBrlLQrs6NqWU=
 github.com/gobwas/httphead v0.1.0/go.mod h1:O/RXo79gxV8G+RqlR/otEwx4Q36zl9rqC5u12GKvMCM=
 github.com/gobwas/pool v0.2.1 h1:xfeeEhW7pwmX8nuLVlqbzVc7udMDrwetjEv+TZIz1og=
@@ -51,40 +40,24 @@ github.com/mattn/go-isatty v0.0.16/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/
 github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
 github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
 github.com/mattn/go-runewidth v0.0.7/go.mod h1:H031xJmbD/WCDINGzjvQ9THkh0rPKHF+m2gUSrubnMI=
-github.com/mattn/go-runewidth v0.0.9 h1:Lm995f3rfxdpd6TSmuVCHVb/QhupuXlYr8sCI/QdE+0=
-github.com/mattn/go-runewidth v0.0.9/go.mod h1:H031xJmbD/WCDINGzjvQ9THkh0rPKHF+m2gUSrubnMI=
 github.com/mattn/go-tty v0.0.4 h1:NVikla9X8MN0SQAqCYzpGyXv0jY7MNl3HOWD2dkle7E=
 github.com/mattn/go-tty v0.0.4/go.mod h1:u5GGXBtZU6RQoKV8gY5W6UhMudbR5vXnUe7j3pxse28=
-github.com/mgechev/dots v0.0.0-20210922191527-e955255bf517 h1:zpIH83+oKzcpryru8ceC6BxnoG8TBrhgAvRg8obzup0=
-github.com/mgechev/dots v0.0.0-20210922191527-e955255bf517/go.mod h1:KQ7+USdGKfpPjXk4Ga+5XxQM4Lm4e3gAogrreFAYpOg=
-github.com/mgechev/revive v1.3.7 h1:502QY0vQGe9KtYJ9FpxMz9rL+Fc/P13CI5POL4uHCcE=
-github.com/mgechev/revive v1.3.7/go.mod h1:RJ16jUbF0OWC3co/+XTxmFNgEpUPwnnA0BRllX2aDNA=
-github.com/mitchellh/go-homedir v1.1.0 h1:lukF9ziXFxDFPkA1vsr5zpc1XuPDn/wFntq5mG+4E0Y=
-github.com/mitchellh/go-homedir v1.1.0/go.mod h1:SfyaCUpYCn1Vlf4IUYiD9fPX4A5wJrkLzIz1N1q0pr0=
-github.com/olekukonko/tablewriter v0.0.5 h1:P2Ga83D34wi1o9J6Wh1mRuqd4mF/x/lgBS7N7AbDhec=
-github.com/olekukonko/tablewriter v0.0.5/go.mod h1:hPp6KlRPjbx+hW8ykQs1w3UBbZlj6HuIJcUGPhkA7kY=
 github.com/orisano/pixelmatch v0.0.0-20210112091706-4fa4c7ba91d5 h1:1SoBaSPudixRecmlHXb/GxmaD3fLMtHIDN13QujwQuc=
 github.com/orisano/pixelmatch v0.0.0-20210112091706-4fa4c7ba91d5/go.mod h1:nZgzbfBr3hhjoZnS66nKrHmduYNpc34ny7RK4z5/HM0=
-github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
-github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/sigurn/crc16 v0.0.0-20211026045750-20ab5afb07e3 h1:aQKxg3+2p+IFXXg97McgDGT5zcMrQoi0EICZs8Pgchs=
 github.com/sigurn/crc16 v0.0.0-20211026045750-20ab5afb07e3/go.mod h1:9/etS5gpQq9BJsJMWg1wpLbfuSnkm8dPF6FdW2JXVhA=
-github.com/spf13/afero v1.11.0 h1:WJQKhtpdm3v2IzqG8VMqrr6Rf3UYpEF239Jy9wNepM8=
-github.com/spf13/afero v1.11.0/go.mod h1:GH9Y3pIexgf1MTIWtNGyogA5MwRIDXGUr+hbWNoBjkY=
-github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
-github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
-github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
-github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
-github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
 github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
 github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
 go.bug.st/serial v1.6.0 h1:mAbRGN4cKE2J5gMwsMHC2KQisdLRQssO9WSM+rbZJ8A=
 go.bug.st/serial v1.6.0/go.mod h1:UABfsluHAiaNI+La2iESysd9Vetq7VRdpxvjx7CmmOE=
-golang.org/x/mod v0.14.0 h1:dGoOF9QVLYng8IHTm7BAyWqCqSheQ5pYWGhzW00YJr0=
-golang.org/x/net v0.20.0 h1:aCL9BSgETF1k+blQaYUBx9hJ9LOGP3gAVemcZlf1Kpo=
-golang.org/x/net v0.20.0/go.mod h1:z8BVo6PvndSri0LbOE3hAn0apkU+1YvI6E70E9jsnvY=
+golang.org/x/mod v0.18.0 h1:5+9lSbEzPSdWkH32vYPBwEpX8KwDbM52Ud9xBUvNlb0=
+golang.org/x/mod v0.18.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
+golang.org/x/net v0.26.0 h1:soB7SVo0PWrY4vPW/+ay0jKDNScG2X9wFeYlXIvJsOQ=
+golang.org/x/net v0.26.0/go.mod h1:5YKkiSynbBIh3p6iOc/vibscux0x38BZDkn8sCUPxHE=
+golang.org/x/sync v0.7.0 h1:YsImfSBoP9QPYL0xyKJPq0gcaJdG3rInoqxTWbfQu9M=
+golang.org/x/sync v0.7.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
 golang.org/x/sys v0.0.0-20190222072716-a9d3bda3a223/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20191008105621-543471e840be/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20191120155948-bd437916bb0e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
@@ -92,18 +65,17 @@ golang.org/x/sys v0.0.0-20201207223542-d4d67f95c62d/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20211124211545-fe61309f8881/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.16.0 h1:xWw16ngr6ZMtmxDyKyIgsE93KNKz5HKmMa3b8ALHidU=
-golang.org/x/sys v0.16.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
-golang.org/x/text v0.14.0 h1:ScX5w1eTa3QqT8oi6+ziP7dTV1S2+ALU0bI+0zXKWiQ=
-golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
-golang.org/x/tools v0.17.0 h1:FvmRgNOcs3kOa+T20R1uhfP9F6HgG2mfxDv1vrx1Htc=
-golang.org/x/tools v0.17.0/go.mod h1:xsh6VxdV005rRVaS6SSAf9oiAqljS7UZUacMZ8Bnsps=
+golang.org/x/sys v0.21.0 h1:rF+pYz3DAGSQAxAu1CbC7catZg4ebC4UIeIhKxBZvws=
+golang.org/x/sys v0.21.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/text v0.16.0 h1:a94ExnEXNtEwYLGJSIUxnWoxoRz/ZcCsV63ROupILh4=
+golang.org/x/text v0.16.0/go.mod h1:GhwF1Be+LQoKShO3cGOHzqOgRrGaYc9AvblQOmPVHnI=
+golang.org/x/tools v0.22.1-0.20240621165957-db513b091504 h1:MMsD8mMfluf/578+3wrTn22pjI/Xkzm+gPW47SYfspY=
+golang.org/x/tools v0.22.1-0.20240621165957-db513b091504/go.mod h1:aCwcsjqvq7Yqt6TNyX7QMU2enbQ/Gt0bo6krSeEri+c=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
 gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
-gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
-tinygo.org/x/go-llvm v0.0.0-20240518103902-697964f2a9dc h1:TCzibFa4oLu+njEP3fnRUmZ+QQeb8BjtOwctgcjzL0k=
-tinygo.org/x/go-llvm v0.0.0-20240518103902-697964f2a9dc/go.mod h1:GFbusT2VTA4I+l4j80b17KFK+6whv69Wtny5U+T8RR0=
+tinygo.org/x/go-llvm v0.0.0-20240804145059-aaff3eb751f0 h1:aN9rSxvVWmipB13yVAFOmRj3LX4Kkfiq/fSl5EAilDA=
+tinygo.org/x/go-llvm v0.0.0-20240804145059-aaff3eb751f0/go.mod h1:GFbusT2VTA4I+l4j80b17KFK+6whv69Wtny5U+T8RR0=
@@ -30,8 +30,11 @@ var Keys = []string{
 }

 func init() {
-	if Get("GOARCH") == "arm" {
+	switch Get("GOARCH") {
+	case "arm":
 		Keys = append(Keys, "GOARM")
+	case "mips", "mipsle":
+		Keys = append(Keys, "GOMIPS")
 	}
 }

@@ -128,6 +131,13 @@ func Get(name string) string {
 		// difference between ARMv6 and ARMv7. ARMv6 binaries are much smaller,
 		// especially when floating point instructions are involved.
 		return "6"
+	case "GOMIPS":
+		gomips := os.Getenv("GOMIPS")
+		if gomips == "" {
+			// Default to hardfloat (this matches the Go toolchain).
+			gomips = "hardfloat"
+		}
+		return gomips
 	case "GOROOT":
 		readGoEnvVars()
 		return goEnvVars.GOROOT
@@ -159,6 +169,11 @@ func Get(name string) string {
 		}

 		return findWasmOpt()
+	case "WASMTOOLS":
+		if path := os.Getenv("WASMTOOLS"); path != "" {
+			return path
+		}
+		return "wasm-tools"
 	default:
 		return ""
 	}
@@ -9,7 +9,7 @@ import (

 // Version of TinyGo.
 // Update this value before release of new version of software.
-const version = "0.32.0-dev"
+const version = "0.33.0-dev"

 var (
 	// This variable is set at build time using -ldflags parameters.
@@ -0,0 +1,30 @@
+// TODO: remove this (by merging it into the top-level go.mod)
+// once the top level go.mod specifies a go new enough to make our version of misspell happy.
+
+module tools
+
+go 1.21
+
+require (
+	github.com/golangci/misspell v0.6.0
+	github.com/mgechev/revive v1.3.9
+)
+
+require (
+	github.com/BurntSushi/toml v1.4.0 // indirect
+	github.com/chavacava/garif v0.1.0 // indirect
+	github.com/fatih/color v1.17.0 // indirect
+	github.com/fatih/structtag v1.2.0 // indirect
+	github.com/hashicorp/go-version v1.7.0 // indirect
+	github.com/mattn/go-colorable v0.1.13 // indirect
+	github.com/mattn/go-isatty v0.0.20 // indirect
+	github.com/mattn/go-runewidth v0.0.9 // indirect
+	github.com/mgechev/dots v0.0.0-20210922191527-e955255bf517 // indirect
+	github.com/mitchellh/go-homedir v1.1.0 // indirect
+	github.com/olekukonko/tablewriter v0.0.5 // indirect
+	github.com/pkg/errors v0.9.1 // indirect
+	github.com/spf13/afero v1.11.0 // indirect
+	golang.org/x/sys v0.22.0 // indirect
+	golang.org/x/text v0.14.0 // indirect
+	golang.org/x/tools v0.23.0 // indirect
+)
@@ -0,0 +1,56 @@
+github.com/BurntSushi/toml v1.4.0 h1:kuoIxZQy2WRRk1pttg9asf+WVv6tWQuBNVmK8+nqPr0=
+github.com/BurntSushi/toml v1.4.0/go.mod h1:ukJfTF/6rtPPRCnwkur4qwRxa8vTRFBF0uk2lLoLwho=
+github.com/chavacava/garif v0.1.0 h1:2JHa3hbYf5D9dsgseMKAmc/MZ109otzgNFk5s87H9Pc=
+github.com/chavacava/garif v0.1.0/go.mod h1:XMyYCkEL58DF0oyW4qDjjnPWONs2HBqYKI+UIPD+Gww=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/fatih/color v1.17.0 h1:GlRw1BRJxkpqUCBKzKOw098ed57fEsKeNjpTe3cSjK4=
+github.com/fatih/color v1.17.0/go.mod h1:YZ7TlrGPkiz6ku9fK3TLD/pl3CpsiFyu8N92HLgmosI=
+github.com/fatih/structtag v1.2.0 h1:/OdNE99OxoI/PqaW/SuSK9uxxT3f/tcSZgon/ssNSx4=
+github.com/fatih/structtag v1.2.0/go.mod h1:mBJUNpUnHmRKrKlQQlmCrh5PuhftFbNv8Ys4/aAZl94=
+github.com/golangci/misspell v0.6.0 h1:JCle2HUTNWirNlDIAUO44hUsKhOFqGPoC4LZxlaSXDs=
+github.com/golangci/misspell v0.6.0/go.mod h1:keMNyY6R9isGaSAu+4Q8NMBwMPkh15Gtc8UCVoDtAWo=
+github.com/hashicorp/go-version v1.7.0 h1:5tqGy27NaOTB8yJKUZELlFAS/LTKJkrmONwQKeRZfjY=
+github.com/hashicorp/go-version v1.7.0/go.mod h1:fltr4n8CU8Ke44wwGCBoEymUuxUHl09ZGVZPK5anwXA=
+github.com/mattn/go-colorable v0.1.13 h1:fFA4WZxdEF4tXPZVKMLwD8oUnCTTo08duU7wxecdEvA=
+github.com/mattn/go-colorable v0.1.13/go.mod h1:7S9/ev0klgBDR4GtXTXX8a3vIGJpMovkB8vQcUbaXHg=
+github.com/mattn/go-isatty v0.0.16/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/yFXSvRLM=
+github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
+github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
+github.com/mattn/go-runewidth v0.0.9 h1:Lm995f3rfxdpd6TSmuVCHVb/QhupuXlYr8sCI/QdE+0=
+github.com/mattn/go-runewidth v0.0.9/go.mod h1:H031xJmbD/WCDINGzjvQ9THkh0rPKHF+m2gUSrubnMI=
+github.com/mgechev/dots v0.0.0-20210922191527-e955255bf517 h1:zpIH83+oKzcpryru8ceC6BxnoG8TBrhgAvRg8obzup0=
+github.com/mgechev/dots v0.0.0-20210922191527-e955255bf517/go.mod h1:KQ7+USdGKfpPjXk4Ga+5XxQM4Lm4e3gAogrreFAYpOg=
+github.com/mgechev/revive v1.3.9 h1:18Y3R4a2USSBF+QZKFQwVkBROUda7uoBlkEuBD+YD1A=
+github.com/mgechev/revive v1.3.9/go.mod h1:+uxEIr5UH0TjXWHTno3xh4u7eg6jDpXKzQccA9UGhHU=
+github.com/mitchellh/go-homedir v1.1.0 h1:lukF9ziXFxDFPkA1vsr5zpc1XuPDn/wFntq5mG+4E0Y=
+github.com/mitchellh/go-homedir v1.1.0/go.mod h1:SfyaCUpYCn1Vlf4IUYiD9fPX4A5wJrkLzIz1N1q0pr0=
+github.com/olekukonko/tablewriter v0.0.5 h1:P2Ga83D34wi1o9J6Wh1mRuqd4mF/x/lgBS7N7AbDhec=
+github.com/olekukonko/tablewriter v0.0.5/go.mod h1:hPp6KlRPjbx+hW8ykQs1w3UBbZlj6HuIJcUGPhkA7kY=
+github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
+github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/spf13/afero v1.11.0 h1:WJQKhtpdm3v2IzqG8VMqrr6Rf3UYpEF239Jy9wNepM8=
+github.com/spf13/afero v1.11.0/go.mod h1:GH9Y3pIexgf1MTIWtNGyogA5MwRIDXGUr+hbWNoBjkY=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
+github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
+github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
+github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
+golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.22.0 h1:RI27ohtqKCnwULzJLqkv897zojh5/DwS/ENaMzUOaWI=
+golang.org/x/sys v0.22.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/text v0.14.0 h1:ScX5w1eTa3QqT8oi6+ziP7dTV1S2+ALU0bI+0zXKWiQ=
+golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
+golang.org/x/tools v0.23.0 h1:SGsXPZ+2l4JsgaCKkx+FQ9YZ5XEtA1GZYuoDjenLjvg=
+golang.org/x/tools v0.23.0/go.mod h1:pnu6ufv6vQkll6szChhK3C3L/ruaIv5eBeztNG8wtsI=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
@@ -1,10 +1,13 @@
 //go:build tools

-// Install linter versions specified in go.mod
-// See https://marcofranssen.nl/manage-go-tools-via-go-modules for idom
+// Install tools specified in go.mod.
+// See https://marcofranssen.nl/manage-go-tools-via-go-modules for idiom.
 package tools

 import (
-	_ "github.com/client9/misspell"
+	_ "github.com/golangci/misspell"
 	_ "github.com/mgechev/revive"
 )
+
+//go:generate go install github.com/golangci/misspell/cmd/misspell
+//go:generate go install github.com/mgechev/revive
@@ -0,0 +1,5 @@
+# wasm-tools directory
+
+This directory has a separate `go.mod` file because the `wasm-tools-go` module requires Go 1.22, while TinyGo itself supports Go 1.19.
+
+When the minimum Go version for TinyGo is 1.22, this directory can be folded into `internal/tools` and the `go.mod` and `go.sum` files deleted.
@@ -0,0 +1,12 @@
+module github.com/tinygo-org/tinygo/internal/tools
+
+go 1.22.4
+
+require github.com/ydnar/wasm-tools-go v0.1.4
+
+require (
+	github.com/coreos/go-semver v0.3.1 // indirect
+	github.com/urfave/cli/v3 v3.0.0-alpha9 // indirect
+	github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673 // indirect
+	golang.org/x/mod v0.19.0 // indirect
+)
@@ -0,0 +1,25 @@
+github.com/coreos/go-semver v0.3.1 h1:yi21YpKnrx1gt5R+la8n5WgS0kCrsPp33dmEyHReZr4=
+github.com/coreos/go-semver v0.3.1/go.mod h1:irMmmIw/7yzSRPWryHsK7EYSg09caPQL03VsM8rvUec=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/sergi/go-diff v1.3.1 h1:xkr+Oxo4BOQKmkn/B9eMK0g5Kg/983T9DqqPHwYqD+8=
+github.com/sergi/go-diff v1.3.1/go.mod h1:aMJSSKb2lpPvRNec0+w3fl7LP9IOFzdc9Pa4NFbPK1I=
+github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
+github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
+github.com/urfave/cli/v3 v3.0.0-alpha9 h1:P0RMy5fQm1AslQS+XCmy9UknDXctOmG/q/FZkUFnJSo=
+github.com/urfave/cli/v3 v3.0.0-alpha9/go.mod h1:0kK/RUFHyh+yIKSfWxwheGndfnrvYSmYFVeKCh03ZUc=
+github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673 h1:bAn7/zixMGCfxrRTfdpNzjtPYqr8smhKouy9mxVdGPU=
+github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673/go.mod h1:N3UwUGtsrSj3ccvlPHLoLsHnpR27oXr4ZE984MbSER8=
+github.com/ydnar/wasm-tools-go v0.1.4 h1:+25WqBj0AhLx8OFvZvrs7bQO6L3WtQ7t6JzQEYsXQb8=
+github.com/ydnar/wasm-tools-go v0.1.4/go.mod h1:lQfv2Tde3tRgZDSYriro0EmdSHzP1mrHPMmYNahSS/g=
+golang.org/x/mod v0.19.0 h1:fEdghXQSo20giMthA7cd28ZC+jts4amQ3YMXiP5oMQ8=
+golang.org/x/mod v0.19.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
+golang.org/x/sync v0.7.0 h1:YsImfSBoP9QPYL0xyKJPq0gcaJdG3rInoqxTWbfQu9M=
+golang.org/x/sync v0.7.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
+golang.org/x/tools v0.23.0 h1:SGsXPZ+2l4JsgaCKkx+FQ9YZ5XEtA1GZYuoDjenLjvg=
+golang.org/x/tools v0.23.0/go.mod h1:pnu6ufv6vQkll6szChhK3C3L/ruaIv5eBeztNG8wtsI=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
@@ -0,0 +1,11 @@
+//go:build tools
+
+// Install tools specified in go.mod.
+// See https://marcofranssen.nl/manage-go-tools-via-go-modules for idiom.
+package tools
+
+import (
+	_ "github.com/ydnar/wasm-tools-go/cmd/wit-bindgen-go"
+)
+
+//go:generate go install github.com/ydnar/wasm-tools-go/cmd/wit-bindgen-go
@@ -28,7 +28,7 @@ All in all, this design provides several benefits:
    it should be a whole lot faster for loops as it doesn't have to call into
    LLVM (via CGo) for every operation.

-As mentioned, this partial evaulator comes in three parts: a compiler, an
+As mentioned, this partial evaluator comes in three parts: a compiler, an
 interpreter, and a memory manager.

 ## Compiler
@@ -52,7 +52,7 @@ func newRunner(mod llvm.Module, timeout time.Duration, debug bool) *runner {
 	return &r
 }

-// Dispose deallocates all alloated LLVM resources.
+// Dispose deallocates all allocated LLVM resources.
 func (r *runner) dispose() {
 	r.targetData.Dispose()
 	r.targetData = llvm.TargetData{}
@@ -417,6 +417,10 @@ func (r *runner) run(fn *function, params []value, parentMem *memoryView, indent
 				} else {
 					locals[inst.localIndex] = literalValue{uint8(0)}
 				}
+			case callFn.name == "__tinygo_interp_raise_test_error":
+				// Special function that will trigger an error.
+				// This is used to test error reporting.
+				return nil, mem, r.errorAt(inst, errors.New("test error"))
 			case strings.HasSuffix(callFn.name, ".$typeassert"):
 				if r.debug {
 					fmt.Fprintln(os.Stderr, indent+"interface assert:", operands[1:])
@@ -236,10 +236,13 @@ func pathsToOverride(goMinor int, needsSyscallPackage bool) map[string]bool {
 		"device/":               false,
 		"examples/":             false,
 		"internal/":             true,
+		"internal/binary/":      false,
 		"internal/bytealg/":     false,
+		"internal/cm/":          false,
 		"internal/fuzz/":        false,
 		"internal/reflectlite/": false,
 		"internal/task/":        false,
+		"internal/wasi/":        false,
 		"machine/":              false,
 		"net/":                  true,
 		"net/http/":             false,
@@ -128,7 +128,7 @@ func Load(config *compileopts.Config, inputPkg string, typeChecker types.Config)
 	}

 	// List the dependencies of this package, in raw JSON format.
-	extraArgs := []string{"-json", "-deps"}
+	extraArgs := []string{"-json", "-deps", "-e"}
 	if config.TestConfig.CompileTestBinary {
 		extraArgs = append(extraArgs, "-test")
 	}
@@ -149,6 +149,7 @@ func Load(config *compileopts.Config, inputPkg string, typeChecker types.Config)

 	// Parse the returned json from `go list`.
 	decoder := json.NewDecoder(buf)
+	var pkgErrors []error
 	for {
 		pkg := &Package{
 			program:      p,
@@ -188,6 +189,12 @@ func Load(config *compileopts.Config, inputPkg string, typeChecker types.Config)
 					pos.Filename = strings.Join(fields[:len(fields)-1], ":")
 					pos.Line, _ = strconv.Atoi(fields[len(fields)-1])
 				}
+				if abs, err := filepath.Abs(pos.Filename); err == nil {
+					// Make the path absolute, so that error messages will be
+					// prettier (it will be turned back into a relative path
+					// when printing the error).
+					pos.Filename = abs
+				}
 				pos.Filename = p.getOriginalPath(pos.Filename)
 			}
 			err := scanner.Error{
@@ -195,10 +202,11 @@ func Load(config *compileopts.Config, inputPkg string, typeChecker types.Config)
 				Msg: pkg.Error.Err,
 			}
 			if len(pkg.Error.ImportStack) != 0 {
-				return nil, Error{
+				pkgErrors = append(pkgErrors, Error{
 					ImportStack: pkg.Error.ImportStack,
 					Err:         err,
-				}
+				})
+				continue
 			}
 			return nil, err
 		}
@@ -241,6 +249,13 @@ func Load(config *compileopts.Config, inputPkg string, typeChecker types.Config)
 		p.Packages[pkg.ImportPath] = pkg
 	}

+	if len(pkgErrors) != 0 {
+		// TODO: use errors.Join in Go 1.20.
+		return nil, Errors{
+			Errs: pkgErrors,
+		}
+	}
+
 	if config.TestConfig.CompileTestBinary && !strings.HasSuffix(p.sorted[len(p.sorted)-1].ImportPath, ".test") {
 		// Trying to compile a test binary but there are no test files in this
 		// package.
@@ -8,8 +8,6 @@ import (
 	"errors"
 	"flag"
 	"fmt"
-	"go/scanner"
-	"go/types"
 	"io"
 	"os"
 	"os/exec"
@@ -30,8 +28,8 @@ import (
 	"github.com/mattn/go-colorable"
 	"github.com/tinygo-org/tinygo/builder"
 	"github.com/tinygo-org/tinygo/compileopts"
+	"github.com/tinygo-org/tinygo/diagnostics"
 	"github.com/tinygo-org/tinygo/goenv"
-	"github.com/tinygo-org/tinygo/interp"
 	"github.com/tinygo-org/tinygo/loader"
 	"golang.org/x/tools/go/buildutil"
 	"tinygo.org/x/go-llvm"
@@ -306,16 +304,25 @@ func Test(pkgName string, stdout, stderr io.Writer, options *compileopts.Options
 			// reads any files.
 			//
 			// Ex. run --dir=.. --dir=../.. --dir=../../..
-			dirs := dirsToModuleRoot(result.MainDir, result.ModuleRoot)
+			var dirs []string
+			switch config.Options.Target {
+			case "wasip1":
+				dirs = dirsToModuleRootRel(result.MainDir, result.ModuleRoot)
+			case "wasip2":
+				dirs = dirsToModuleRootAbs(result.MainDir, result.ModuleRoot)
+			default:
+				return fmt.Errorf("unknown GOOS target: %v", config.Options.Target)
+			}
+
 			args := []string{"run"}
-			for _, d := range dirs[1:] {
+			for _, d := range dirs {
 				args = append(args, "--dir="+d)
 			}

-			// The below re-organizes the arguments so that the current
-			// directory is added last.
+			args = append(args, "--env=PWD="+cmd.Dir)
+
 			args = append(args, cmd.Args[1:]...)
-			cmd.Args = append(cmd.Args[:1:1], args...)
+			cmd.Args = args
 		}

 		// Run the test.
@@ -338,6 +345,11 @@ func Test(pkgName string, stdout, stderr io.Writer, options *compileopts.Options
 		}
 		return err
 	})
+
+	if testConfig.CompileOnly {
+		return true, nil
+	}
+
 	importPath := strings.TrimSuffix(result.ImportPath, ".test")

 	var w io.Writer = stdout
@@ -348,7 +360,7 @@ func Test(pkgName string, stdout, stderr io.Writer, options *compileopts.Options
 		fmt.Fprintf(w, "?   \t%s\t[no test files]\n", err.ImportPath)
 		// Pretend the test passed - it at least didn't fail.
 		return true, nil
-	} else if passed && !testConfig.CompileOnly {
+	} else if passed {
 		fmt.Fprintf(w, "ok  \t%s\t%.3fs\n", importPath, duration.Seconds())
 	} else {
 		fmt.Fprintf(w, "FAIL\t%s\t%.3fs\n", importPath, duration.Seconds())
@@ -356,8 +368,8 @@ func Test(pkgName string, stdout, stderr io.Writer, options *compileopts.Options
 	return passed, err
 }

-func dirsToModuleRoot(maindir, modroot string) []string {
-	var dirs = []string{"."}
+func dirsToModuleRootRel(maindir, modroot string) []string {
+	var dirs []string
 	last := ".."
 	// strip off path elements until we hit the module root
 	// adding `..`, `../..`, `../../..` until we're done
@@ -366,6 +378,20 @@ func dirsToModuleRoot(maindir, modroot string) []string {
 		last = filepath.Join(last, "..")
 		maindir = filepath.Dir(maindir)
 	}
+	dirs = append(dirs, ".")
+	return dirs
+}
+
+func dirsToModuleRootAbs(maindir, modroot string) []string {
+	var dirs = []string{maindir}
+	last := filepath.Join(maindir, "..")
+	// strip off path elements until we hit the module root
+	// adding `..`, `../..`, `../../..` until we're done
+	for maindir != modroot {
+		dirs = append(dirs, last)
+		last = filepath.Join(last, "..")
+		maindir = filepath.Dir(maindir)
+	}
 	return dirs
 }

@@ -785,6 +811,9 @@ func Run(pkgName string, options *compileopts.Options, cmdArgs []string) error {
 // passes command line arguments and evironment variables in a way appropriate
 // for the given emulator.
 func buildAndRun(pkgName string, config *compileopts.Config, stdout io.Writer, cmdArgs, environmentVars []string, timeout time.Duration, run func(cmd *exec.Cmd, result builder.BuildResult) error) (builder.BuildResult, error) {
+
+	isSingleFile := strings.HasSuffix(pkgName, ".go")
+
 	// Determine whether we're on a system that supports environment variables
 	// and command line parameters (operating systems, WASI) or not (baremetal,
 	// WebAssembly in the browser). If we're on a system without an environment,
@@ -818,9 +847,6 @@ func buildAndRun(pkgName string, config *compileopts.Config, stdout io.Writer, c
 			}
 		}
 	} else if config.EmulatorName() == "wasmtime" {
-		// Wasmtime needs some special flags to pass environment variables
-		// and allow reading from the current directory.
-		emuArgs = append(emuArgs, "--dir=.")
 		for _, v := range environmentVars {
 			emuArgs = append(emuArgs, "--env", v)
 		}
@@ -876,7 +902,26 @@ func buildAndRun(pkgName string, config *compileopts.Config, stdout io.Writer, c
 		if err != nil {
 			return result, err
 		}
+
 		name = emulator[0]
+
+		if name == "wasmtime" {
+			// Wasmtime needs some special flags to pass environment variables
+			// and allow reading from the current directory.
+			switch config.Options.Target {
+			case "wasip1":
+				emuArgs = append(emuArgs, "--dir=.")
+			case "wasip2":
+				dir := result.MainDir
+				if isSingleFile {
+					cwd, _ := os.Getwd()
+					dir = cwd
+				}
+				emuArgs = append(emuArgs, "--dir="+dir)
+				emuArgs = append(emuArgs, "--env=PWD="+dir)
+			}
+		}
+
 		emuArgs = append(emuArgs, emulator[1:]...)
 		args = append(emuArgs, args...)
 	}
@@ -891,7 +936,7 @@ func buildAndRun(pkgName string, config *compileopts.Config, stdout io.Writer, c

 	// Configure stdout/stderr. The stdout may go to a buffer, not a real
 	// stdout.
-	cmd.Stdout = stdout
+	cmd.Stdout = newOutputWriter(stdout, result.Executable)
 	cmd.Stderr = os.Stderr
 	if config.EmulatorName() == "simavr" {
 		cmd.Stdout = nil // don't print initial load commands
@@ -1030,7 +1075,8 @@ func findFATMounts(options *compileopts.Options) ([]mountPoint, error) {
 				continue
 			}
 			fstype := fields[2]
-			if fstype != "vfat" {
+			// chromeos bind mounts use 9p
+			if !(fstype == "vfat" || fstype == "9p") {
 				continue
 			}
 			fspath := strings.ReplaceAll(fields[1], "\\040", " ")
@@ -1244,83 +1290,13 @@ func usage(command string) {
 	}
 }

-// try to make the path relative to the current working directory. If any error
-// occurs, this error is ignored and the absolute path is returned instead.
-func tryToMakePathRelative(dir string) string {
-	wd, err := os.Getwd()
-	if err != nil {
-		return dir
-	}
-	relpath, err := filepath.Rel(wd, dir)
-	if err != nil {
-		return dir
-	}
-	return relpath
-}
-
-// printCompilerError prints compiler errors using the provided logger function
-// (similar to fmt.Println).
-//
-// There is one exception: interp errors may print to stderr unconditionally due
-// to limitations in the LLVM bindings.
-func printCompilerError(logln func(...interface{}), err error) {
-	switch err := err.(type) {
-	case types.Error:
-		printCompilerError(logln, scanner.Error{
-			Pos: err.Fset.Position(err.Pos),
-			Msg: err.Msg,
-		})
-	case scanner.Error:
-		if !strings.HasPrefix(err.Pos.Filename, filepath.Join(goenv.Get("GOROOT"), "src")) && !strings.HasPrefix(err.Pos.Filename, filepath.Join(goenv.Get("TINYGOROOT"), "src")) {
-			// This file is not from the standard library (either the GOROOT or
-			// the TINYGOROOT). Make the path relative, for easier reading.
-			// Ignore any errors in the process (falling back to the absolute
-			// path).
-			err.Pos.Filename = tryToMakePathRelative(err.Pos.Filename)
-		}
-		logln(err)
-	case scanner.ErrorList:
-		for _, scannerErr := range err {
-			printCompilerError(logln, *scannerErr)
-		}
-	case *interp.Error:
-		logln("#", err.ImportPath)
-		logln(err.Error())
-		if len(err.Inst) != 0 {
-			logln(err.Inst)
-		}
-		if len(err.Traceback) > 0 {
-			logln("\ntraceback:")
-			for _, line := range err.Traceback {
-				logln(line.Pos.String() + ":")
-				logln(line.Inst)
-			}
-		}
-	case loader.Errors:
-		logln("#", err.Pkg.ImportPath)
-		for _, err := range err.Errs {
-			printCompilerError(logln, err)
-		}
-	case loader.Error:
-		logln(err.Err.Error())
-		logln("package", err.ImportStack[0])
-		for _, pkgPath := range err.ImportStack[1:] {
-			logln("\timports", pkgPath)
-		}
-	case *builder.MultiError:
-		for _, err := range err.Errs {
-			printCompilerError(logln, err)
-		}
-	default:
-		logln("error:", err)
-	}
-}
-
 func handleCompilerError(err error) {
 	if err != nil {
-		printCompilerError(func(args ...interface{}) {
-			fmt.Fprintln(os.Stderr, args...)
-		}, err)
+		wd, getwdErr := os.Getwd()
+		if getwdErr != nil {
+			wd = ""
+		}
+		diagnostics.CreateDiagnostics(err).WriteTo(os.Stderr, wd)
 		os.Exit(1)
 	}
 }
@@ -1461,10 +1437,16 @@ func main() {
 		flag.BoolVar(&flagTest, "test", false, "supply -test flag to go list")
 	}
 	var outpath string
-	if command == "help" || command == "build" || command == "build-library" || command == "test" {
+	if command == "help" || command == "build" || command == "test" {
 		flag.StringVar(&outpath, "o", "", "output filename")
 	}

+	var witPackage, witWorld string
+	if command == "help" || command == "build" || command == "test" || command == "run" {
+		flag.StringVar(&witPackage, "wit-package", "", "wit package for wasm component embedding")
+		flag.StringVar(&witWorld, "wit-world", "", "wit world for wasm component embedding")
+	}
+
 	var testConfig compileopts.TestConfig
 	if command == "help" || command == "test" {
 		flag.BoolVar(&testConfig.CompileOnly, "c", false, "compile the test binary but do not run it")
@@ -1485,7 +1467,8 @@ func main() {
 	case "clang", "ld.lld", "wasm-ld":
 		err := builder.RunTool(command, os.Args[2:]...)
 		if err != nil {
-			fmt.Fprintln(os.Stderr, err)
+			// The tool should have printed an error message already.
+			// Don't print another error message here.
 			os.Exit(1)
 		}
 		os.Exit(0)
@@ -1516,6 +1499,7 @@ func main() {
 		GOOS:            goenv.Get("GOOS"),
 		GOARCH:          goenv.Get("GOARCH"),
 		GOARM:           goenv.Get("GOARM"),
+		GOMIPS:          goenv.Get("GOMIPS"),
 		Target:          *target,
 		StackSize:       stackSize,
 		Opt:             *opt,
@@ -1544,6 +1528,8 @@ func main() {
 		Monitor:         *monitor,
 		BaudRate:        *baudrate,
 		Timeout:         *timeout,
+		WITPackage:      witPackage,
+		WITWorld:        witWorld,
 	}
 	if *printCommands {
 		options.PrintCommands = printCommand
@@ -1586,50 +1572,6 @@ func main() {

 		err := Build(pkgName, outpath, options)
 		handleCompilerError(err)
-	case "build-library":
-		// Note: this command is only meant to be used while making a release!
-		if outpath == "" {
-			fmt.Fprintln(os.Stderr, "No output filename supplied (-o).")
-			usage(command)
-			os.Exit(1)
-		}
-		if *target == "" {
-			fmt.Fprintln(os.Stderr, "No target (-target).")
-		}
-		if flag.NArg() != 1 {
-			fmt.Fprintf(os.Stderr, "Build-library only accepts exactly one library name as argument, %d given\n", flag.NArg())
-			usage(command)
-			os.Exit(1)
-		}
-		var lib *builder.Library
-		switch name := flag.Arg(0); name {
-		case "compiler-rt":
-			lib = &builder.CompilerRT
-		case "picolibc":
-			lib = &builder.Picolibc
-		default:
-			fmt.Fprintf(os.Stderr, "Unknown library: %s\n", name)
-			os.Exit(1)
-		}
-		tmpdir, err := os.MkdirTemp("", "tinygo*")
-		if err != nil {
-			handleCompilerError(err)
-		}
-		defer os.RemoveAll(tmpdir)
-		spec, err := compileopts.LoadTarget(options)
-		if err != nil {
-			handleCompilerError(err)
-		}
-		config := &compileopts.Config{
-			Options: options,
-			Target:  spec,
-		}
-		path, err := lib.Load(config, tmpdir)
-		handleCompilerError(err)
-		err = copyFile(path, outpath)
-		if err != nil {
-			handleCompilerError(err)
-		}
 	case "flash", "gdb", "lldb":
 		pkgName := filepath.ToSlash(flag.Arg(0))
 		if command == "flash" {
@@ -1714,9 +1656,11 @@ func main() {
 				stderr := (*testStderr)(buf)
 				passed, err := Test(pkgName, stdout, stderr, options, outpath)
 				if err != nil {
-					printCompilerError(func(args ...interface{}) {
-						fmt.Fprintln(stderr, args...)
-					}, err)
+					wd, getwdErr := os.Getwd()
+					if getwdErr != nil {
+						wd = ""
+					}
+					diagnostics.CreateDiagnostics(err).WriteTo(os.Stderr, wd)
 				}
 				if !passed {
 					select {
@@ -1794,6 +1738,7 @@ func main() {
 				GOOS       string                  `json:"goos"`
 				GOARCH     string                  `json:"goarch"`
 				GOARM      string                  `json:"goarm"`
+				GOMIPS     string                  `json:"gomips"`
 				BuildTags  []string                `json:"build_tags"`
 				GC         string                  `json:"garbage_collector"`
 				Scheduler  string                  `json:"scheduler"`
@@ -1804,6 +1749,7 @@ func main() {
 				GOOS:       config.GOOS(),
 				GOARCH:     config.GOARCH(),
 				GOARM:      config.GOARM(),
+				GOMIPS:     config.GOMIPS(),
 				BuildTags:  config.BuildTags(),
 				GC:         config.GC(),
 				Scheduler:  config.Scheduler(),
@@ -8,7 +8,6 @@ import (
 	"bytes"
 	"errors"
 	"flag"
-	"fmt"
 	"io"
 	"os"
 	"os/exec"
@@ -24,6 +23,7 @@ import (
 	"github.com/aykevl/go-wasm"
 	"github.com/tinygo-org/tinygo/builder"
 	"github.com/tinygo-org/tinygo/compileopts"
+	"github.com/tinygo-org/tinygo/diagnostics"
 	"github.com/tinygo-org/tinygo/goenv"
 )

@@ -36,6 +36,7 @@ var supportedLinuxArches = map[string]string{
 	"X86Linux":   "linux/386",
 	"ARMLinux":   "linux/arm/6",
 	"ARM64Linux": "linux/arm64",
+	"MIPSLinux":  "linux/mipsle/hardfloat",
 	"WASIp1":     "wasip1/wasm",
 }

@@ -181,6 +182,10 @@ func TestBuild(t *testing.T) {
 			t.Parallel()
 			runPlatTests(optionsFromTarget("wasip1", sema), tests, t)
 		})
+		t.Run("WASIp2", func(t *testing.T) {
+			t.Parallel()
+			runPlatTests(optionsFromTarget("wasip2", sema), tests, t)
+		})
 	}
 }

@@ -206,6 +211,12 @@ func runPlatTests(options compileopts.Options, tests []string, t *testing.T) {
 				continue
 			}
 		}
+		if options.GOOS == "linux" && (options.GOARCH == "mips" || options.GOARCH == "mipsle") {
+			if name == "atomic.go" {
+				// 64-bit atomic operations aren't currently supported on MIPS.
+				continue
+			}
+		}
 		if options.Target == "simavr" {
 			// Not all tests are currently supported on AVR.
 			// Skip the ones that aren't.
@@ -235,6 +246,14 @@ func runPlatTests(options compileopts.Options, tests []string, t *testing.T) {
 			default:
 			}
 		}
+		if options.Target == "wasip2" {
+			switch name {
+			case "cgo/":
+				// waisp2 use our own libc; cgo tests fail
+				continue
+			}
+		}
+
 		name := name // redefine to avoid race condition
 		t.Run(name, func(t *testing.T) {
 			t.Parallel()
@@ -267,10 +286,18 @@ func runPlatTests(options compileopts.Options, tests []string, t *testing.T) {
 			runTest("rand.go", options, t, nil, nil)
 		})
 	}
-	if !isWebAssembly {
-		// The recover() builtin isn't supported yet on WebAssembly and Windows.
+	if !isWASI {
+		// On WebAssembly, recover() needs the exception handling proposal which
+		// isn't (as of 2024) implemented in wasmtime so this test is skipped on
+		// WASI.
 		t.Run("recover.go", func(t *testing.T) {
 			t.Parallel()
+			options := options
+			if isWebAssembly {
+				// Hack: Asyncify doesn't support exception handling
+				// instructions.
+				options.Scheduler = "none"
+			}
 			runTest("recover.go", options, t, nil, nil)
 		})
 	}
@@ -297,11 +324,16 @@ func emuCheck(t *testing.T, options compileopts.Options) {
 }

 func optionsFromTarget(target string, sema chan struct{}) compileopts.Options {
+	separators := strings.Count(target, "/")
+	if (separators == 1 || separators == 2) && !strings.HasSuffix(target, ".json") {
+		return optionsFromOSARCH(target, sema)
+	}
 	return compileopts.Options{
 		// GOOS/GOARCH are only used if target == ""
 		GOOS:          goenv.Get("GOOS"),
 		GOARCH:        goenv.Get("GOARCH"),
 		GOARM:         goenv.Get("GOARM"),
+		GOMIPS:        goenv.Get("GOMIPS"),
 		Target:        target,
 		Semaphore:     sema,
 		InterpTimeout: 180 * time.Second,
@@ -325,8 +357,11 @@ func optionsFromOSARCH(osarch string, sema chan struct{}) compileopts.Options {
 		VerifyIR:      true,
 		Opt:           "z",
 	}
-	if options.GOARCH == "arm" {
+	switch options.GOARCH {
+	case "arm":
 		options.GOARM = parts[2]
+	case "mips", "mipsle":
+		options.GOMIPS = parts[2]
 	}
 	return options
 }
@@ -364,7 +399,11 @@ func runTestWithConfig(name string, t *testing.T, options compileopts.Options, c
 		return cmd.Run()
 	})
 	if err != nil {
-		printCompilerError(t.Log, err)
+		w := &bytes.Buffer{}
+		diagnostics.CreateDiagnostics(err).WriteTo(w, "")
+		for _, line := range strings.Split(strings.TrimRight(w.String(), "\n"), "\n") {
+			t.Log(line)
+		}
 		t.Fail()
 		return
 	}
@@ -393,6 +432,7 @@ func runTestWithConfig(name string, t *testing.T, options compileopts.Options, c
 		fail = true
 	} else if !bytes.Equal(expected, actual) {
 		t.Logf("output did not match (expected %d bytes, got %d bytes):", len(expected), len(actual))
+		t.Logf(string(Diff("expected", expected, "actual", actual)))
 		fail = true
 	}

@@ -667,7 +707,8 @@ func TestMain(m *testing.M) {
 			// Invoke a specific tool.
 			err := builder.RunTool(os.Args[1], os.Args[2:]...)
 			if err != nil {
-				fmt.Fprintln(os.Stderr, err)
+				// The tool should have printed an error message already.
+				// Don't print another error message here.
 				os.Exit(1)
 			}
 			os.Exit(0)
@@ -0,0 +1,26 @@
+acuire,acquire
+addess,address
+adust,adjust
+allcoate,allocate
+alloated,allocated
+archtecture,architecture
+arcive,archive
+beconfigured,be configured
+configration,configuration
+contants,constants
+cricital,critical
+evaulator,evaluator
+freqency,frequency
+frquency,frequency
+implmented,implemented
+interrput,interrupt
+interrut,interrupt
+poitner,pointer
+probbably,probably
+refection,reflection
+satisifying,satisfying
+simulataneously,simultaneously
+suggets,suggests
+undefied,undefined
+unecessary,unnecessary
+unsiged,unsigned
@@ -197,31 +197,14 @@ func Monitor(executable, port string, config *compileopts.Config) error {

 	go func() {
 		buf := make([]byte, 100*1024)
-		var line []byte
+		writer := newOutputWriter(os.Stdout, executable)
 		for {
 			n, err := serialConn.Read(buf)
 			if err != nil {
 				errCh <- fmt.Errorf("read error: %w", err)
 				return
 			}
-			start := 0
-			for i, c := range buf[:n] {
-				if c == '\n' {
-					os.Stdout.Write(buf[start : i+1])
-					start = i + 1
-					address := extractPanicAddress(line)
-					if address != 0 {
-						loc, err := addressToLine(executable, address)
-						if err == nil && loc.IsValid() {
-							fmt.Printf("[tinygo: panic at %s]\n", loc.String())
-						}
-					}
-					line = line[:0]
-				} else {
-					line = append(line, c)
-				}
-			}
-			os.Stdout.Write(buf[start:n])
+			writer.Write(buf[:n])
 		}
 	}()

@@ -400,3 +383,42 @@ func readDWARF(executable string) (*dwarf.Data, error) {
 		return nil, errors.New("unknown binary format")
 	}
 }
+
+type outputWriter struct {
+	out        io.Writer
+	executable string
+	line       []byte
+}
+
+// newOutputWriter returns an io.Writer that will intercept panic addresses and
+// will try to insert a source location in the output if the source location can
+// be found in the executable.
+func newOutputWriter(out io.Writer, executable string) *outputWriter {
+	return &outputWriter{
+		out:        out,
+		executable: executable,
+	}
+}
+
+func (w *outputWriter) Write(p []byte) (n int, err error) {
+	start := 0
+	for i, c := range p {
+		if c == '\n' {
+			w.out.Write(p[start : i+1])
+			start = i + 1
+			address := extractPanicAddress(w.line)
+			if address != 0 {
+				loc, err := addressToLine(w.executable, address)
+				if err == nil && loc.Filename != "" {
+					fmt.Printf("[tinygo: panic at %s]\n", loc.String())
+				}
+			}
+			w.line = w.line[:0]
+		} else {
+			w.line = append(w.line, c)
+		}
+	}
+	w.out.Write(p[start:])
+	n = len(p)
+	return
+}
@@ -1,9 +1,9 @@
-//go:build darwin || tinygo.wasm
+//go:build darwin || wasip1 || wasip2 || wasm

 // This implementation of crypto/rand uses the arc4random_buf function
 // (available on both MacOS and WASI) to generate random numbers.
 //
-// Note: arc4random_buf (unlike what the name suggets) does not use the insecure
+// Note: arc4random_buf (unlike what the name suggests) does not use the insecure
 // RC4 cipher. Instead, it uses a high-quality cipher, varying by the libc
 // implementation.

@@ -1,4 +1,4 @@
-//go:build linux && !baremetal && !wasip1
+//go:build linux && !baremetal && !wasip1 && !wasip2

 // This implementation of crypto/rand uses the /dev/urandom pseudo-file to
 // generate random numbers.
@@ -10,6 +10,7 @@ import (
 	"context"
 	"crypto"
 	"crypto/x509"
+	"fmt"
 	"io"
 	"net"
 	"sync"
@@ -23,9 +24,21 @@ import (
 // only supports Elliptic Curve based groups. See RFC 8446, Section 4.2.7.
 type CurveID uint16

+// CipherSuiteName returns the standard name for the passed cipher suite ID
+//
+// Not Implemented.
+func CipherSuiteName(id uint16) string {
+	return fmt.Sprintf("0x%04X", id)
+}
+
 // ConnectionState records basic TLS details about the connection.
 type ConnectionState struct {
 	// TINYGO: empty; TLS connection offloaded to device
+	//
+	// Minimum (empty) fields for fortio.org/log http logging and others
+	// to compile and run.
+	PeerCertificates []*x509.Certificate
+	CipherSuite      uint16
 }

 // ClientAuthType declares the policy the server will follow for
@@ -101,7 +101,7 @@ type Dialer struct {
 //
 // The returned Conn, if any, will always be of type *Conn.
 func (d *Dialer) DialContext(ctx context.Context, network, addr string) (net.Conn, error) {
-	return nil, errors.New("tls:DialContext not implmented")
+	return nil, errors.New("tls:DialContext not implemented")
 }

 // LoadX509KeyPair reads and parses a public/private key pair from a pair
@@ -3,6 +3,10 @@
 // tinygo build -size short -o hello-unknown.wasm -target wasm-unknown -gc=leaking -no-debug ./src/examples/hello-wasm-unknown/
 package main

+// Smoke test: make sure the fmt package can be imported (even if it isn't
+// really useful for wasm-unknown).
+import _ "os"
+
 var x int32

 //go:wasmimport hosted echo_i32
@@ -0,0 +1,17 @@
+package main
+
+// This is the same as examples/serial, but it also imports the machine package.
+// It is used as a smoke test for the machine package (for boards that don't
+// have an on-board LED and therefore can't use examples/blinky1).
+
+import (
+	_ "machine" // smoke test for the machine package
+	"time"
+)
+
+func main() {
+	for {
+		println("hello world!")
+		time.Sleep(time.Second)
+	}
+}
@@ -0,0 +1,32 @@
+// Package binary is a lightweight replacement package for encoding/binary.
+package binary
+
+// This file contains small helper functions for working with binary data.
+
+var LittleEndian = littleEndian{}
+
+type littleEndian struct{}
+
+// Encode data like encoding/binary.LittleEndian.Uint16.
+func (littleEndian) Uint16(b []byte) uint16 {
+	return uint16(b[0]) | uint16(b[1])<<8
+}
+
+// Store data like binary.LittleEndian.PutUint16.
+func (littleEndian) PutUint16(b []byte, v uint16) {
+	b[0] = byte(v)
+	b[1] = byte(v >> 8)
+}
+
+// Append data like binary.LittleEndian.AppendUint16.
+func (littleEndian) AppendUint16(b []byte, v uint16) []byte {
+	return append(b,
+		byte(v),
+		byte(v>>8),
+	)
+}
+
+// Encode data like encoding/binary.LittleEndian.Uint32.
+func (littleEndian) Uint32(b []byte) uint32 {
+	return uint32(b[0]) | uint32(b[1])<<8 | uint32(b[2])<<16 | uint32(b[3])<<24
+}
@@ -0,0 +1,118 @@
+package cm
+
+import "unsafe"
+
+// Reinterpret reinterprets the bits of type From into type T.
+// Will panic if the size of From is smaller than the size of To.
+func Reinterpret[T, From any](from From) (to T) {
+	if unsafe.Sizeof(to) > unsafe.Sizeof(from) {
+		panic("reinterpret: size of to > from")
+	}
+	return *(*T)(unsafe.Pointer(&from))
+}
+
+// LowerString lowers a [string] into a pair of Core WebAssembly types.
+//
+// [string]: https://pkg.go.dev/builtin#string
+func LowerString[S ~string](s S) (*byte, uint32) {
+	return unsafe.StringData(string(s)), uint32(len(s))
+}
+
+// LiftString lifts Core WebAssembly types into a [string].
+func LiftString[T ~string, Data unsafe.Pointer | uintptr | *uint8, Len uint | uintptr | uint32 | uint64](data Data, len Len) T {
+	return T(unsafe.String((*uint8)(unsafe.Pointer(data)), int(len)))
+}
+
+// LowerList lowers a [List] into a pair of Core WebAssembly types.
+func LowerList[L ~struct{ list[T] }, T any](list L) (*T, uint32) {
+	l := (*List[T])(unsafe.Pointer(&list))
+	return l.data, uint32(l.len)
+}
+
+// LiftList lifts Core WebAssembly types into a [List].
+func LiftList[L List[T], T any, Data unsafe.Pointer | uintptr | *T, Len uint | uintptr | uint32 | uint64](data Data, len Len) L {
+	return L(NewList((*T)(unsafe.Pointer(data)), uint(len)))
+}
+
+// BoolToU32 converts a value whose underlying type is [bool] into a [uint32].
+// Used to lower a [bool] into a Core WebAssembly i32 as specified in the [Canonical ABI].
+//
+// [bool]: https://pkg.go.dev/builtin#bool
+// [uint32]: https://pkg.go.dev/builtin#uint32
+// [Canonical ABI]: https://github.com/WebAssembly/component-model/blob/main/design/mvp/CanonicalABI.md
+func BoolToU32[B ~bool](v B) uint32 { return uint32(*(*uint8)(unsafe.Pointer(&v))) }
+
+// U32ToBool converts a [uint32] into a [bool].
+// Used to lift a Core WebAssembly i32 into a [bool] as specified in the [Canonical ABI].
+//
+// [uint32]: https://pkg.go.dev/builtin#uint32
+// [bool]: https://pkg.go.dev/builtin#bool
+// [Canonical ABI]: https://github.com/WebAssembly/component-model/blob/main/design/mvp/CanonicalABI.md
+func U32ToBool(v uint32) bool { tmp := uint8(v); return *(*bool)(unsafe.Pointer(&tmp)) }
+
+// F32ToU32 maps the bits of a [float32] into a [uint32].
+// Used to lower a [float32] into a Core WebAssembly i32 as specified in the [Canonical ABI].
+//
+// [Canonical ABI]: https://github.com/WebAssembly/component-model/blob/main/design/mvp/CanonicalABI.md
+// [float32]: https://pkg.go.dev/builtin#float32
+// [uint32]: https://pkg.go.dev/builtin#uint32
+func F32ToU32(v float32) uint32 { return *(*uint32)(unsafe.Pointer(&v)) }
+
+// U32ToF32 maps the bits of a [uint32] into a [float32].
+// Used to lift a Core WebAssembly i32 into a [float32] as specified in the [Canonical ABI].
+//
+// [uint32]: https://pkg.go.dev/builtin#uint32
+// [float32]: https://pkg.go.dev/builtin#float32
+// [Canonical ABI]: https://github.com/WebAssembly/component-model/blob/main/design/mvp/CanonicalABI.md
+func U32ToF32(v uint32) float32 { return *(*float32)(unsafe.Pointer(&v)) }
+
+// F64ToU64 maps the bits of a [float64] into a [uint64].
+// Used to lower a [float64] into a Core WebAssembly i64 as specified in the [Canonical ABI].
+//
+// [float64]: https://pkg.go.dev/builtin#float64
+// [uint64]: https://pkg.go.dev/builtin#uint64
+// [Canonical ABI]: https://github.com/WebAssembly/component-model/blob/main/design/mvp/CanonicalABI.md
+//
+// [uint32]: https://pkg.go.dev/builtin#uint32
+func F64ToU64(v float64) uint64 { return *(*uint64)(unsafe.Pointer(&v)) }
+
+// U64ToF64 maps the bits of a [uint64] into a [float64].
+// Used to lift a Core WebAssembly i64 into a [float64] as specified in the [Canonical ABI].
+//
+// [uint64]: https://pkg.go.dev/builtin#uint64
+// [float64]: https://pkg.go.dev/builtin#float64
+// [Canonical ABI]: https://github.com/WebAssembly/component-model/blob/main/design/mvp/CanonicalABI.md
+func U64ToF64(v uint64) float64 { return *(*float64)(unsafe.Pointer(&v)) }
+
+// PointerToU32 converts a pointer of type *T into a [uint32].
+// Used to lower a pointer into a Core WebAssembly i32 as specified in the [Canonical ABI].
+//
+// [uint32]: https://pkg.go.dev/builtin#uint32
+// [Canonical ABI]: https://github.com/WebAssembly/component-model/blob/main/design/mvp/CanonicalABI.md
+func PointerToU32[T any](v *T) uint32 { return uint32(uintptr(unsafe.Pointer(v))) }
+
+// U32ToPointer converts a [uint32] into a pointer of type *T.
+// Used to lift a Core WebAssembly i32 into a pointer as specified in the [Canonical ABI].
+//
+// [uint32]: https://pkg.go.dev/builtin#uint32
+// [Canonical ABI]: https://github.com/WebAssembly/component-model/blob/main/design/mvp/CanonicalABI.md
+func U32ToPointer[T any](v uint32) *T { return (*T)(unsafePointer(uintptr(v))) }
+
+// PointerToU64 converts a pointer of type *T into a [uint64].
+// Used to lower a pointer into a Core WebAssembly i64 as specified in the [Canonical ABI].
+//
+// [uint64]: https://pkg.go.dev/builtin#uint64
+// [Canonical ABI]: https://github.com/WebAssembly/component-model/blob/main/design/mvp/CanonicalABI.md
+func PointerToU64[T any](v *T) uint64 { return uint64(uintptr(unsafe.Pointer(v))) }
+
+// U64ToPointer converts a [uint64] into a pointer of type *T.
+// Used to lift a Core WebAssembly i64 into a pointer as specified in the [Canonical ABI].
+//
+// [uint64]: https://pkg.go.dev/builtin#uint64
+// [Canonical ABI]: https://github.com/WebAssembly/component-model/blob/main/design/mvp/CanonicalABI.md
+func U64ToPointer[T any](v uint64) *T { return (*T)(unsafePointer(uintptr(v))) }
+
+// Appease vet, see https://github.com/golang/go/issues/58625
+func unsafePointer(p uintptr) unsafe.Pointer {
+	return *(*unsafe.Pointer)(unsafe.Pointer(&p))
+}
@@ -0,0 +1,8 @@
+// Package cm contains types and functions for interfacing with the WebAssembly Component Model.
+//
+// The types in this package (such as [List], [Option], [Result], and [Variant]) are designed to match the memory layout
+// of [Component Model] types as specified in the [Canonical ABI].
+//
+// [Component Model]: https://component-model.bytecodealliance.org/introduction.html
+// [Canonical ABI]: https://github.com/WebAssembly/component-model/blob/main/design/mvp/CanonicalABI.md#alignment
+package cm
@@ -0,0 +1,48 @@
+package cm
+
+import "unsafe"
+
+// List represents a Component Model list.
+// The binary representation of list<T> is similar to a Go slice minus the cap field.
+type List[T any] struct{ list[T] }
+
+// NewList returns a List[T] from data and len.
+func NewList[T any](data *T, len uint) List[T] {
+	return List[T]{
+		list[T]{
+			data: data,
+			len:  len,
+		},
+	}
+}
+
+// ToList returns a List[T] equivalent to the Go slice s.
+// The underlying slice data is not copied, and the resulting List points at the
+// same array storage as the slice.
+func ToList[S ~[]T, T any](s S) List[T] {
+	return NewList[T](unsafe.SliceData([]T(s)), uint(len(s)))
+}
+
+// list represents the internal representation of a Component Model list.
+// It is intended to be embedded in a [List], so embedding types maintain
+// the methods defined on this type.
+type list[T any] struct {
+	data *T
+	len  uint
+}
+
+// Slice returns a Go slice representing the List.
+func (l list[T]) Slice() []T {
+	return unsafe.Slice(l.data, l.len)
+}
+
+// Data returns the data pointer for the list.
+func (l list[T]) Data() *T {
+	return l.data
+}
+
+// Len returns the length of the list.
+// TODO: should this return an int instead of a uint?
+func (l list[T]) Len() uint {
+	return l.len
+}
@@ -0,0 +1,44 @@
+package cm
+
+// Option represents a Component Model [option<T>] type.
+//
+// [option<T>]: https://component-model.bytecodealliance.org/design/wit.html#options
+type Option[T any] struct{ option[T] }
+
+// None returns an [Option] representing the none case,
+// equivalent to the zero value.
+func None[T any]() Option[T] {
+	return Option[T]{}
+}
+
+// Some returns an [Option] representing the some case.
+func Some[T any](v T) Option[T] {
+	return Option[T]{
+		option[T]{
+			isSome: true,
+			some:   v,
+		},
+	}
+}
+
+// option represents the internal representation of a Component Model option type.
+// The first byte is a bool representing none or some,
+// followed by storage for the associated type T.
+type option[T any] struct {
+	isSome bool
+	some   T
+}
+
+// None returns true if o represents the none case.
+func (o *option[T]) None() bool {
+	return !o.isSome
+}
+
+// Some returns a non-nil *T if o represents the some case,
+// or nil if o represents the none case.
+func (o *option[T]) Some() *T {
+	if o.isSome {
+		return &o.some
+	}
+	return nil
+}
@@ -0,0 +1,21 @@
+package cm
+
+// Resource represents an opaque Component Model [resource handle].
+// It is represented in the [Canonical ABI] as an 32-bit integer.
+//
+// [resource handle]: https://github.com/WebAssembly/component-model/blob/main/design/mvp/Explainer.md#handle-types
+// [Canonical ABI]: https://github.com/WebAssembly/component-model/blob/main/design/mvp/CanonicalABI.md
+type Resource uint32
+
+// Rep represents a Component Model [resource rep], the core representation type of a resource.
+// It is represented in the [Canonical ABI] as an 32-bit integer.
+//
+// [resource rep]: https://github.com/WebAssembly/component-model/blob/main/design/mvp/CanonicalABI.md#canon-resourcerep
+// [Canonical ABI]: https://github.com/WebAssembly/component-model/blob/main/design/mvp/CanonicalABI.md
+type Rep uint32
+
+// ResourceNone is a sentinel value indicating a null or uninitialized resource.
+// This is a reserved value specified in the [Canonical ABI runtime state].
+//
+// [Canonical ABI runtime state]: https://github.com/WebAssembly/component-model/blob/main/design/mvp/CanonicalABI.md#runtime-state
+const ResourceNone = 0
@@ -0,0 +1,107 @@
+package cm
+
+import "unsafe"
+
+const (
+	// ResultOK represents the OK case of a result.
+	ResultOK = false
+
+	// ResultErr represents the error case of a result.
+	ResultErr = true
+)
+
+// BoolResult represents a result with no OK or error type.
+// False represents the OK case and true represents the error case.
+type BoolResult bool
+
+// Result represents a result sized to hold the Shape type.
+// The size of the Shape type must be greater than or equal to the size of OK and Err types.
+// For results with two zero-length types, use [BoolResult].
+type Result[Shape, OK, Err any] struct{ result[Shape, OK, Err] }
+
+// result represents the internal representation of a Component Model result type.
+type result[Shape, OK, Err any] struct {
+	isErr bool
+	_     [0]OK
+	_     [0]Err
+	data  Shape // [unsafe.Sizeof(*(*Shape)(unsafe.Pointer(nil)))]byte
+}
+
+// IsOK returns true if r represents the OK case.
+func (r *result[Shape, OK, Err]) IsOK() bool {
+	r.validate()
+	return !r.isErr
+}
+
+// IsErr returns true if r represents the error case.
+func (r *result[Shape, OK, Err]) IsErr() bool {
+	r.validate()
+	return r.isErr
+}
+
+// OK returns a non-nil *OK pointer if r represents the OK case.
+// If r represents an error, then it returns nil.
+func (r *result[Shape, OK, Err]) OK() *OK {
+	r.validate()
+	if r.isErr {
+		return nil
+	}
+	return (*OK)(unsafe.Pointer(&r.data))
+}
+
+// Err returns a non-nil *Err pointer if r represents the error case.
+// If r represents the OK case, then it returns nil.
+func (r *result[Shape, OK, Err]) Err() *Err {
+	r.validate()
+	if !r.isErr {
+		return nil
+	}
+	return (*Err)(unsafe.Pointer(&r.data))
+}
+
+// This function is sized so it can be inlined and optimized away.
+func (r *result[Shape, OK, Err]) validate() {
+	var shape Shape
+	var ok OK
+	var err Err
+
+	// Check if size of Shape is greater than both OK and Err
+	if unsafe.Sizeof(shape) > unsafe.Sizeof(ok) && unsafe.Sizeof(shape) > unsafe.Sizeof(err) {
+		panic("result: size of data type > OK and Err types")
+	}
+
+	// Check if size of OK is greater than Shape
+	if unsafe.Sizeof(ok) > unsafe.Sizeof(shape) {
+		panic("result: size of OK type > data type")
+	}
+
+	// Check if size of Err is greater than Shape
+	if unsafe.Sizeof(err) > unsafe.Sizeof(shape) {
+		panic("result: size of Err type > data type")
+	}
+
+	// Check if Shape is zero-sized, but size of result != 1
+	if unsafe.Sizeof(shape) == 0 && unsafe.Sizeof(*r) != 1 {
+		panic("result: size of data type == 0, but result size != 1")
+	}
+}
+
+// OK returns an OK result with shape Shape and type OK and Err.
+// Pass Result[OK, OK, Err] or Result[Err, OK, Err] as the first type argument.
+func OK[R ~struct{ result[Shape, OK, Err] }, Shape, OK, Err any](ok OK) R {
+	var r struct{ result[Shape, OK, Err] }
+	r.validate()
+	r.isErr = ResultOK
+	*((*OK)(unsafe.Pointer(&r.data))) = ok
+	return R(r)
+}
+
+// Err returns an error result with shape Shape and type OK and Err.
+// Pass Result[OK, OK, Err] or Result[Err, OK, Err] as the first type argument.
+func Err[R ~struct{ result[Shape, OK, Err] }, Shape, OK, Err any](err Err) R {
+	var r struct{ result[Shape, OK, Err] }
+	r.validate()
+	r.isErr = ResultErr
+	*((*Err)(unsafe.Pointer(&r.data))) = err
+	return R(r)
+}
--- a/Show More
+++ b/Show More