testing: run cleanups after exiting a benchmark run

This is important, otherwise temporary directories don't get removed. Issue found while working on Go 1.20 support.
fe310: add I2C pins for the HiFive1b
2026-07-26 22:58:41 +00:00 · 2025-10-03 10:35:24 +02:00 · 2025-10-02 20:26:25 +02:00 · 2025-10-02 05:42:08 +02:00 · 2025-09-20 08:35:34 +02:00 · 2025-09-19 15:32:01 +02:00
106 changed files with 1330 additions and 728 deletions
@@ -92,16 +92,20 @@ commands:
            - /go/pkg/mod

 jobs:
-  test-llvm15-go122:
+  test-oldest:
+    # This tests our lowest supported versions of Go and LLVM, to make sure at
+    # least the smoke tests still pass.
    docker:
      - image: golang:1.22-bullseye
    steps:
      - test-linux:
          llvm: "15"
    resource_class: large
-  test-llvm20-go124:
+  test-newest:
+    # This tests the latest supported LLVM version when linking against system
+    # libraries.
    docker:
-      - image: golang:1.24-bullseye
+      - image: golang:1.25-bullseye
    steps:
      - test-linux:
          llvm: "20"
@@ -110,8 +114,6 @@ jobs:
 workflows:
  test-all:
    jobs:
-      # This tests our lowest supported versions of Go and LLVM, to make sure at
-      # least the smoke tests still pass.
-      - test-llvm15-go122
-      # This tests LLVM 20 support when linking against system libraries.
-      - test-llvm20-go124
+      - test-oldest
+      # disable this test, since CircleCI seems unable to download due to rate-limits on Dockerhub.
+      # - test-newest
@@ -30,22 +30,22 @@ jobs:
        run: |
          HOMEBREW_NO_AUTO_UPDATE=1 brew install qemu binaryen
      - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
        with:
          submodules: true
      - name: Extract TinyGo version
        id: version
        run: ./.github/workflows/tinygo-extract-version.sh | tee -a "$GITHUB_OUTPUT"
      - name: Install Go
-        uses: actions/setup-go@v5
+        uses: actions/setup-go@v6
        with:
-          go-version: '1.24'
+          go-version: '1.25.1'
          cache: true
      - name: Restore LLVM source cache
        uses: actions/cache/restore@v4
        id: cache-llvm-source
        with:
-          key: llvm-source-19-${{ matrix.os }}-v1
+          key: llvm-source-20-${{ matrix.os }}-v1
          path: |
            llvm-project/clang/lib/Headers
            llvm-project/clang/include
@@ -70,7 +70,7 @@ jobs:
        uses: actions/cache/restore@v4
        id: cache-llvm-build
        with:
-          key: llvm-build-19-${{ matrix.os }}-v1
+          key: llvm-build-20-${{ matrix.os }}-v2
          path: llvm-build
      - name: Build LLVM
        if: steps.cache-llvm-build.outputs.cache-hit != 'true'
@@ -79,7 +79,7 @@ jobs:
          rm -rf llvm-project
          make llvm-source
          # install dependencies
-          HOMEBREW_NO_AUTO_UPDATE=1 brew install cmake ninja
+          HOMEBREW_NO_AUTO_UPDATE=1 brew install ninja
          # build!
          make llvm-build
          find llvm-build -name CMakeFiles -prune -exec rm -r '{}' \;
@@ -130,11 +130,11 @@ jobs:
        run: |
          brew install llvm@${{ matrix.version }}
      - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
      - name: Install Go
-        uses: actions/setup-go@v5
+        uses: actions/setup-go@v6
        with:
-          go-version: '1.24'
+          go-version: '1.25.1'
          cache: true
      - name: Build TinyGo (LLVM ${{ matrix.version }})
        run: go install -tags=llvm${{ matrix.version }}
@@ -18,7 +18,7 @@ jobs:
    # statically linked binary.
    runs-on: ubuntu-latest
    container:
-      image: golang:1.24-alpine
+      image: golang:1.25-alpine
    outputs:
      version: ${{ steps.version.outputs.version }}
    steps:
@@ -26,7 +26,7 @@ jobs:
        # tar: needed for actions/cache@v4
        # git+openssh: needed for checkout (I think?)
        # ruby: needed to install fpm
-        run: apk add tar git openssh make g++ ruby-dev
+        run: apk add tar git openssh make g++ ruby-dev mold
      - name: Work around CVE-2022-24765
        # We're not on a multi-user machine, so this is safe.
        run: git config --global --add safe.directory "$GITHUB_WORKSPACE"
@@ -48,7 +48,7 @@ jobs:
        uses: actions/cache/restore@v4
        id: cache-llvm-source
        with:
-          key: llvm-source-19-linux-alpine-v1
+          key: llvm-source-20-linux-alpine-v1
          path: |
            llvm-project/clang/lib/Headers
            llvm-project/clang/include
@@ -73,7 +73,7 @@ jobs:
        uses: actions/cache/restore@v4
        id: cache-llvm-build
        with:
-          key: llvm-build-19-linux-alpine-v1
+          key: llvm-build-20-linux-alpine-v1
          path: llvm-build
      - name: Build LLVM
        if: steps.cache-llvm-build.outputs.cache-hit != 'true'
@@ -137,7 +137,7 @@ jobs:
      - name: Install Go
        uses: actions/setup-go@v5
        with:
-          go-version: '1.24'
+          go-version: '1.25.0'
          cache: true
      - name: Install wasmtime
        uses: bytecodealliance/actions/wasmtime/setup@v1
@@ -181,7 +181,7 @@ jobs:
      - name: Install Go
        uses: actions/setup-go@v5
        with:
-          go-version: '1.24'
+          go-version: '1.25.0'
          cache: true
      - name: Install Node.js
        uses: actions/setup-node@v4
@@ -197,7 +197,7 @@ jobs:
        uses: actions/cache/restore@v4
        id: cache-llvm-source
        with:
-          key: llvm-source-19-linux-asserts-v1
+          key: llvm-source-20-linux-asserts-v1
          path: |
            llvm-project/clang/lib/Headers
            llvm-project/clang/include
@@ -222,7 +222,7 @@ jobs:
        uses: actions/cache/restore@v4
        id: cache-llvm-build
        with:
-          key: llvm-build-19-linux-asserts-v1
+          key: llvm-build-20-linux-asserts-v1
          path: llvm-build
      - name: Build LLVM
        if: steps.cache-llvm-build.outputs.cache-hit != 'true'
@@ -298,13 +298,13 @@ jobs:
      - name: Install Go
        uses: actions/setup-go@v5
        with:
-          go-version: '1.24'
+          go-version: '1.25.0'
          cache: true
      - name: Restore LLVM source cache
        uses: actions/cache/restore@v4
        id: cache-llvm-source
        with:
-          key: llvm-source-19-linux-v1
+          key: llvm-source-20-linux-v1
          path: |
            llvm-project/clang/lib/Headers
            llvm-project/clang/include
@@ -329,7 +329,7 @@ jobs:
        uses: actions/cache/restore@v4
        id: cache-llvm-build
        with:
-          key: llvm-build-19-linux-${{ matrix.goarch }}-v3
+          key: llvm-build-20-linux-${{ matrix.goarch }}-v1
          path: llvm-build
      - name: Build LLVM
        if: steps.cache-llvm-build.outputs.cache-hit != 'true'
@@ -35,8 +35,8 @@ jobs:
        uses: docker/metadata-action@v5
        with:
          images: |
-            tinygo/llvm-19
-            ghcr.io/${{ github.repository_owner }}/llvm-19
+            tinygo/llvm-20
+            ghcr.io/${{ github.repository_owner }}/llvm-20
          tags: |
            type=sha,format=long
            type=raw,value=latest
@@ -29,7 +29,7 @@ jobs:
        uses: actions/cache/restore@v4
        id: cache-llvm-source
        with:
-          key: llvm-source-19-linux-nix-v1
+          key: llvm-source-20-linux-nix-v1
          path: |
            llvm-project/compiler-rt
      - name: Download LLVM source
@@ -30,7 +30,7 @@ jobs:
        uses: actions/cache@v4
        id: cache-llvm-source
        with:
-          key: llvm-source-19-sizediff-v1
+          key: llvm-source-20-sizediff-v1
          path: |
            llvm-project/compiler-rt
      - name: Download LLVM source
@@ -41,13 +41,13 @@ jobs:
      - name: Install Go
        uses: actions/setup-go@v5
        with:
-          go-version: '1.24'
+          go-version: '1.25.0'
          cache: true
      - name: Restore cached LLVM source
        uses: actions/cache/restore@v4
        id: cache-llvm-source
        with:
-          key: llvm-source-19-windows-v1
+          key: llvm-source-20-windows-v1
          path: |
            llvm-project/clang/lib/Headers
            llvm-project/clang/include
@@ -72,7 +72,7 @@ jobs:
        uses: actions/cache/restore@v4
        id: cache-llvm-build
        with:
-          key: llvm-build-19-windows-v1
+          key: llvm-build-20-windows-v2
          path: llvm-build
      - name: Build LLVM
        if: steps.cache-llvm-build.outputs.cache-hit != 'true'
@@ -147,7 +147,7 @@ jobs:
      - name: Install Go
        uses: actions/setup-go@v5
        with:
-          go-version: '1.24'
+          go-version: '1.25.0'
          cache: true
      - name: Download TinyGo build
        uses: actions/download-artifact@v4
@@ -177,7 +177,7 @@ jobs:
      - name: Install Go
        uses: actions/setup-go@v5
        with:
-          go-version: '1.24'
+          go-version: '1.25.0'
          cache: true
      - name: Download TinyGo build
        uses: actions/download-artifact@v4
@@ -213,7 +213,7 @@ jobs:
      - name: Install Go
        uses: actions/setup-go@v5
        with:
-          go-version: '1.24'
+          go-version: '1.25.0'
          cache: true
      - name: Download TinyGo build
        uses: actions/download-artifact@v4
@@ -22,7 +22,7 @@
 	url = https://github.com/tinygo-org/stm32-svd
 [submodule "lib/musl"]
 	path = lib/musl
-	url = git://git.musl-libc.org/musl
+	url = https://github.com/tinygo-org/musl-libc.git
 [submodule "lib/binaryen"]
 	path = lib/binaryen
 	url = https://github.com/WebAssembly/binaryen.git
@@ -1,3 +1,55 @@
+0.39.0
+---
+* **general**
+  - all: add Go 1.25 support
+  - net: update to latest tinygo net package
+  - docs: clarify build verification step for macOS users
+  - Add flag to skip Renesas SVD builds
+* **build**
+  - Makefile: install missing dlmalloc files
+  - flash: add -o flag support to save built binary (Fixes #4937) (#4942)
+  - fix: update version of clang to 17 to accommodate latest Go 1.25 docker base image
+* **ci**
+  - chore: update all CI builds to test Go 1.25 release
+  - fix: disable test-newest since CircleCI seems unable to download due to rate-limits on Dockerhub
+  - ci: rename some jobs to avoid churn on every Go/LLVM version bump
+  - ci: make the goroutines test less racy
+  - tests: de-flake goroutines test
+* **compiler**
+  - compiler: implement internal/abi.Escape
+* **main**
+  - main: show the compiler error (if any) for `tinygo test -c`
+  - chore: correct GOOS=js name in error messages for WASM
+* **machine**
+  - machine: add international keys
+  - machine: remove some unnecessary "// peripherals:" comments
+  - machine: add I2C pin comments
+  - machine: standardize I2C errors with "i2c:" prefix
+  - machine: make I2C usable in the simulator
+  - fix: add SPI and I2C to teensy 4.1 (#4943)
+  - `rp2`: use the correct channel mask for rp2350 ADC; hold lock during read (#4938)
+  - `rp2`: disable digital input for analog inputs
+* **runtime**
+  - runtime: ensure time.Sleep(d) sleeps at least d
+  - runtime: stub out weak pointer support
+  - runtime: implement dummy AddCleanup
+  - runtime: enable multi-core scheduler for rp2350
+  - `internal/task`: use -stack-size flag when starting a new thread
+  - `internal/task`: add SA_RESTART flag to GC interrupts
+  - `internal/task`: a few small correctness fixes
+  - `internal/gclayout`: make gclayout values constants
+  - darwin: add threading support and use it by default
+* **standard library**
+  - `sync`: implement sync.Swap
+  - `reflect`: implement Method.IsExported
+* **testing**
+  - testing: stub out testing.B.Loop
+* **targets**
+  - `stm32`: add support for the STM32L031G6U6
+  - add metro-rp2350 board definition (#4989)
+  - `rp2040/rp2350`: set the default stack size to 8k for rp2040/rp2350 based boards where this was not already the case
+
+
 0.38.0
 ---
 * **general**
@@ -1,8 +1,8 @@
 # tinygo-llvm stage obtains the llvm source for TinyGo
-FROM golang:1.24 AS tinygo-llvm
+FROM golang:1.25 AS tinygo-llvm

 RUN apt-get update && \
-    apt-get install -y apt-utils make cmake clang-15 ninja-build && \
+    apt-get install -y apt-utils make cmake clang-17 ninja-build && \
    rm -rf \
        /var/lib/apt/lists/* \
        /var/log/* \
@@ -33,7 +33,7 @@ RUN cd /tinygo/ && \

 # tinygo-compiler copies the compiler build over to a base Go container (without
 # all the build tools etc).
-FROM golang:1.24 AS tinygo-compiler
+FROM golang:1.25 AS tinygo-compiler

 # Copy tinygo build.
 COPY --from=tinygo-compiler-build /tinygo/build/release/tinygo /tinygo
@@ -79,6 +79,26 @@ ifeq (1, $(STATIC))
    BINARYEN_OPTION += -DCMAKE_CXX_FLAGS="-static" -DCMAKE_C_FLAGS="-static"
 endif

+# Optimize the binary size for Linux.
+# These flags may work on other platforms, but have only been tested on Linux.
+ifeq ($(uname),Linux)
+    HAS_MOLD := $(shell command -v ld.mold 2> /dev/null)
+    HAS_LLD := $(shell command -v ld.lld 2> /dev/null)
+    LLVM_CFLAGS := -ffunction-sections -fdata-sections -fvisibility=hidden
+    LLVM_LDFLAGS := -Wl,--gc-sections
+    ifneq ($(HAS_MOLD),)
+        # Mold might be slightly faster.
+        LLVM_LDFLAGS += -fuse-ld=mold -Wl,--icf=all
+    else ifneq ($(HAS_LLD),)
+        # LLD is more commonly available.
+        LLVM_LDFLAGS += -fuse-ld=lld -Wl,--icf=all
+    endif
+    LLVM_OPTION += \
+        -DCMAKE_C_FLAGS="$(LLVM_CFLAGS)" \
+        -DCMAKE_CXX_FLAGS="$(LLVM_CFLAGS)"
+    CGO_LDFLAGS += $(LLVM_LDFLAGS)
+endif
+
 # Cross compiling support.
 ifneq ($(CROSS),)
    CC = $(CROSS)-gcc
@@ -243,7 +263,7 @@ gen-device-renesas: build/gen-device-svd
 	GO111MODULE=off $(GO) fmt ./src/device/renesas

 $(LLVM_PROJECTDIR)/llvm:
-	git clone -b xtensa_release_19.1.2 --depth=1 https://github.com/espressif/llvm-project $(LLVM_PROJECTDIR)
+	git clone -b tinygo_20.x --depth=1 https://github.com/tinygo-org/llvm-project $(LLVM_PROJECTDIR)
 llvm-source: $(LLVM_PROJECTDIR)/llvm ## Get LLVM sources

 # Configure LLVM.
@@ -460,11 +480,15 @@ TEST_PACKAGES_HOST := $(TEST_PACKAGES_FAST) $(TEST_PACKAGES_WINDOWS)
 TEST_IOFS := false
 endif

+TEST_SKIP_FLAG := -skip='TestExtraMethods|TestParseAndBytesRoundTrip/P256/Generic'
+
 # Test known-working standard library packages.
 # TODO: parallelize, and only show failing tests (no implied -v flag).
 .PHONY: tinygo-test
 tinygo-test:
-	$(TINYGO) test $(TEST_PACKAGES_HOST) $(TEST_PACKAGES_SLOW)
+	@# TestExtraMethods: used by many crypto packages and uses reflect.Type.Method which is not implemented.
+	@# TestParseAndBytesRoundTrip/P256/Generic: relies on t.Skip() which is not implemented
+	$(TINYGO) test $(TEST_SKIP_FLAG) $(TEST_PACKAGES_HOST) $(TEST_PACKAGES_SLOW)
 	@# io/fs requires os.ReadDir, not yet supported on windows or wasi. It also
 	@# requires a large stack-size. Hence, io/fs is only run conditionally.
 	@# For more details, see the comments on issue #3143.
@@ -472,7 +496,7 @@ ifeq ($(TEST_IOFS),true)
 	$(TINYGO) test -stack-size=6MB io/fs
 endif
 tinygo-test-fast:
-	$(TINYGO) test $(TEST_PACKAGES_HOST)
+	$(TINYGO) test $(TEST_SKIP_FLAG) $(TEST_PACKAGES_HOST)
 tinygo-bench:
 	$(TINYGO) test -bench . $(TEST_PACKAGES_HOST) $(TEST_PACKAGES_SLOW)
 tinygo-bench-fast:
@@ -480,18 +504,18 @@ tinygo-bench-fast:

 # Same thing, except for wasi rather than the current platform.
 tinygo-test-wasm:
-	$(TINYGO) test -target wasm $(TEST_PACKAGES_WASM)
+	$(TINYGO) test -target wasm $(TEST_SKIP_FLAG) $(TEST_PACKAGES_WASM)
 tinygo-test-wasi:
-	$(TINYGO) test -target wasip1 $(TEST_PACKAGES_FAST) $(TEST_PACKAGES_SLOW) ./tests/runtime_wasi
+	$(TINYGO) test -target wasip1 $(TEST_SKIP_FLAG) $(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
+	GOOS=wasip1 GOARCH=wasm $(TINYGO) test $(TEST_SKIP_FLAG) $(TEST_PACKAGES_FAST) $(TEST_PACKAGES_SLOW) ./tests/runtime_wasi
 tinygo-test-wasip1-fast:
-	$(TINYGO) test -target=wasip1 $(TEST_PACKAGES_FAST) ./tests/runtime_wasi
+	$(TINYGO) test -target=wasip1 $(TEST_SKIP_FLAG) $(TEST_PACKAGES_FAST) ./tests/runtime_wasi

 tinygo-test-wasip2-slow:
-	$(TINYGO) test -target=wasip2 $(TEST_PACKAGES_SLOW)
+	$(TINYGO) test -target=wasip2 $(TEST_SKIP_FLAG) $(TEST_PACKAGES_SLOW)
 tinygo-test-wasip2-fast:
-	$(TINYGO) test -target=wasip2 $(TEST_PACKAGES_FAST) ./tests/runtime_wasi
+	$(TINYGO) test -target=wasip2 $(TEST_SKIP_FLAG) $(TEST_PACKAGES_FAST) ./tests/runtime_wasi

 tinygo-test-wasip2-sum-slow:
 	TINYGO=$(TINYGO) \
@@ -517,7 +541,7 @@ tinygo-bench-wasip2-fast:

 # Run tests on riscv-qemu since that one provides a large amount of memory.
 tinygo-test-baremetal:
-	$(TINYGO) test -target riscv-qemu $(TEST_PACKAGES_BAREMETAL)
+	$(TINYGO) test -target riscv-qemu $(TEST_SKIP_FLAG) $(TEST_PACKAGES_BAREMETAL)

 # Test external packages in a large corpus.
 test-corpus:
@@ -771,6 +795,8 @@ endif
 	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=gopher-badge      examples/blinky1
 	@$(MD5SUM) test.hex
+	$(TINYGO) build -size short -o test.hex -target=gopher-arcade      examples/blinky1
+	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=ae-rp2040           examples/echo
 	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=thumby              examples/echo
@@ -781,6 +807,8 @@ endif
 	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=pico-plus2          examples/blinky1
 	@$(MD5SUM) test.hex
+	$(TINYGO) build -size short -o test.hex -target=metro-rp2350        examples/blinky1
+	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=waveshare-rp2040-tiny examples/echo
 	@$(MD5SUM) test.hex
 	# test pwm
@@ -945,7 +973,7 @@ endif


 wasmtest:
-	$(GO) test ./tests/wasm
+	cd ./tests/wasm && $(GO) test .

 build/release: tinygo gen-device $(if $(filter 1,$(USE_SYSTEM_BINARYEN)),,binaryen)
 	@mkdir -p build/release/tinygo/bin
@@ -1092,6 +1120,7 @@ endif
 tools:
 	cd internal/tools && go generate -tags tools ./

+LINTDIRS=src/os/ src/reflect/
 .PHONY: lint
 lint: tools ## Lint source tree
 	revive -version
@@ -1099,7 +1128,10 @@ lint: tools ## Lint source tree
 	# 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
-	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/... $$( find $(LINTDIRS) -type f -name '*.go' ) \
+		| grep -v "should have comment or be unexported" \
+		| grep '.' \
+		| awk '{print}; END {exit NR>0}'

 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
@@ -1046,7 +1046,7 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 		// Special format for the ESP family of chips (parsed by the ROM
 		// bootloader).
 		result.Binary = filepath.Join(tmpdir, "main"+outext)
-		err := makeESPFirmareImage(result.Executable, result.Binary, outputBinaryFormat)
+		err := makeESPFirmwareImage(result.Executable, result.Binary, outputBinaryFormat)
 		if err != nil {
 			return result, err
 		}
@@ -144,8 +144,6 @@ bool AssemblerInvocation::CreateFromArgs(AssemblerInvocation &Opts,
            .Default(llvm::DebugCompressionType::None);
  }

-  Opts.RelaxELFRelocations = !Args.hasArg(OPT_mrelax_relocations_no);
-  Opts.SSE2AVX = Args.hasArg(OPT_msse2avx);
  if (auto *DwarfFormatArg = Args.getLastArg(OPT_gdwarf64, OPT_gdwarf32))
    Opts.Dwarf64 = DwarfFormatArg->getOption().matches(OPT_gdwarf64);
  Opts.DwarfVersion = getLastArgIntValue(Args, OPT_dwarf_version_EQ, 2, Diags);
@@ -236,6 +234,9 @@ bool AssemblerInvocation::CreateFromArgs(AssemblerInvocation &Opts,
  Opts.EmitCompactUnwindNonCanonical =
      Args.hasArg(OPT_femit_compact_unwind_non_canonical);
  Opts.Crel = Args.hasArg(OPT_crel);
+  Opts.ImplicitMapsyms = Args.hasArg(OPT_mmapsyms_implicit);
+  Opts.X86RelaxRelocations = !Args.hasArg(OPT_mrelax_relocations_no);
+  Opts.X86Sse2Avx = Args.hasArg(OPT_msse2avx);

  Opts.AsSecureLogFile = Args.getLastArgValue(OPT_as_secure_log_file);

@@ -294,8 +295,9 @@ static bool ExecuteAssemblerImpl(AssemblerInvocation &Opts,
  MCOptions.EmitCompactUnwindNonCanonical = Opts.EmitCompactUnwindNonCanonical;
  MCOptions.MCSaveTempLabels = Opts.SaveTemporaryLabels;
  MCOptions.Crel = Opts.Crel;
-  MCOptions.X86RelaxRelocations = Opts.RelaxELFRelocations;
-  MCOptions.X86Sse2Avx = Opts.SSE2AVX;
+  MCOptions.ImplicitMapSyms = Opts.ImplicitMapsyms;
+  MCOptions.X86RelaxRelocations = Opts.X86RelaxRelocations;
+  MCOptions.X86Sse2Avx = Opts.X86Sse2Avx;
  MCOptions.CompressDebugSections = Opts.CompressDebugSections;
  MCOptions.AsSecureLogFile = Opts.AsSecureLogFile;

@@ -343,10 +345,6 @@ static bool ExecuteAssemblerImpl(AssemblerInvocation &Opts,
  // MCObjectFileInfo needs a MCContext reference in order to initialize itself.
  std::unique_ptr<MCObjectFileInfo> MOFI(
      TheTarget->createMCObjectFileInfo(Ctx, PIC));
-  if (Opts.DarwinTargetVariantTriple)
-    MOFI->setDarwinTargetVariantTriple(*Opts.DarwinTargetVariantTriple);
-  if (!Opts.DarwinTargetVariantSDKVersion.empty())
-    MOFI->setDarwinTargetVariantSDKVersion(Opts.DarwinTargetVariantSDKVersion);
  Ctx.setObjectFileInfo(MOFI.get());

  if (Opts.GenDwarfForAssembly)
@@ -428,6 +426,13 @@ static bool ExecuteAssemblerImpl(AssemblerInvocation &Opts,
    Str.reset(TheTarget->createMCObjectStreamer(
        T, Ctx, std::move(MAB), std::move(OW), std::move(CE), *STI));
    Str.get()->initSections(Opts.NoExecStack, *STI);
+    if (T.isOSBinFormatMachO() && T.isOSDarwin()) {
+      Triple *TVT = Opts.DarwinTargetVariantTriple
+                        ? &*Opts.DarwinTargetVariantTriple
+                        : nullptr;
+      Str->emitVersionForTarget(T, VersionTuple(), TVT,
+                                Opts.DarwinTargetVariantSDKVersion);
+    }
  }

  // When -fembed-bitcode is passed to clang_as, a 1-byte marker
@@ -45,10 +45,6 @@ struct AssemblerInvocation {
  LLVM_PREFERRED_TYPE(bool)
  unsigned GenDwarfForAssembly : 1;
  LLVM_PREFERRED_TYPE(bool)
-  unsigned RelaxELFRelocations : 1;
-  LLVM_PREFERRED_TYPE(bool)
-  unsigned SSE2AVX : 1;
-  LLVM_PREFERRED_TYPE(bool)
  unsigned Dwarf64 : 1;
  unsigned DwarfVersion;
  std::string DwarfDebugFlags;
@@ -117,6 +113,13 @@ struct AssemblerInvocation {

  LLVM_PREFERRED_TYPE(bool)
  unsigned Crel : 1;
+  LLVM_PREFERRED_TYPE(bool)
+  unsigned ImplicitMapsyms : 1;
+
+  LLVM_PREFERRED_TYPE(bool)
+  unsigned X86RelaxRelocations : 1;
+  LLVM_PREFERRED_TYPE(bool)
+  unsigned X86Sse2Avx : 1;

  /// The name of the relocation model to use.
  std::string RelocationModel;
@@ -148,7 +151,6 @@ public:
    ShowInst = 0;
    ShowEncoding = 0;
    RelaxAll = 0;
-    SSE2AVX = 0;
    NoExecStack = 0;
    FatalWarnings = 0;
    NoWarn = 0;
@@ -160,6 +162,9 @@ public:
    EmitDwarfUnwind = EmitDwarfUnwindType::Default;
    EmitCompactUnwindNonCanonical = false;
    Crel = false;
+    ImplicitMapsyms = 0;
+    X86RelaxRelocations = 0;
+    X86Sse2Avx = 0;
  }

  static bool CreateFromArgs(AssemblerInvocation &Res,
@@ -60,7 +60,7 @@ bool tinygo_clang_driver(int argc, char **argv) {
 			}

 			// Create the actual diagnostics engine.
-			Clang->createDiagnostics();
+			Clang->createDiagnostics(*llvm::vfs::getRealFileSystem());
 			if (!Clang->hasDiagnostics()) {
 				return false;
 			}
@@ -26,7 +26,7 @@ func NewConfig(options *compileopts.Options) (*compileopts.Config, error) {

 	// Version range supported by TinyGo.
 	const minorMin = 19
-	const minorMax = 24
+	const minorMax = 25

 	// Check that we support this Go toolchain version.
 	gorootMajor, gorootMinor, err := goenv.GetGorootVersion()
@@ -23,7 +23,7 @@ type espImageSegment struct {
 	data []byte
 }

-// makeESPFirmareImage converts an input ELF file to an image file for an ESP32 or
+// makeESPFirmwareImage converts an input ELF file to an image file for an ESP32 or
 // ESP8266 chip. This is a special purpose image format just for the ESP chip
 // family, and is parsed by the on-chip mask ROM bootloader.
 //
@@ -31,7 +31,7 @@ type espImageSegment struct {
 // https://github.com/espressif/esptool/wiki/Firmware-Image-Format
 // https://github.com/espressif/esp-idf/blob/8fbb63c2a701c22ccf4ce249f43aded73e134a34/components/bootloader_support/include/esp_image_format.h#L58
 // https://github.com/espressif/esptool/blob/master/esptool.py
-func makeESPFirmareImage(infile, outfile, format string) error {
+func makeESPFirmwareImage(infile, outfile, format string) error {
 	inf, err := elf.Open(infile)
 	if err != nil {
 		return err
@@ -42,9 +42,9 @@ func TestBinarySize(t *testing.T) {
 	// This is a small number of very diverse targets that we want to test.
 	tests := []sizeTest{
 		// microcontrollers
-		{"hifive1b", "examples/echo", 4556, 280, 0, 2264},
-		{"microbit", "examples/serial", 2920, 388, 8, 2272},
-		{"wioterminal", "examples/pininterrupt", 7379, 1489, 116, 6912},
+		{"hifive1b", "examples/echo", 3884, 280, 0, 2268},
+		{"microbit", "examples/serial", 2924, 388, 8, 2272},
+		{"wioterminal", "examples/pininterrupt", 7365, 1491, 116, 6912},

 		// TODO: also check wasm. Right now this is difficult, because
 		// wasm binaries are run through wasm-opt and therefore the
@@ -121,6 +121,29 @@ func (b *builder) createKeepAliveImpl() {
 	b.CreateRetVoid()
 }

+// createAbiEscapeImpl implements the generic internal/abi.Escape function. It
+// currently only supports pointer types.
+func (b *builder) createAbiEscapeImpl() {
+	b.createFunctionStart(true)
+
+	// The first parameter is assumed to be a pointer. This is checked at the
+	// call site of createAbiEscapeImpl.
+	pointerValue := b.getValue(b.fn.Params[0], getPos(b.fn))
+
+	// Create an equivalent of the following C code, which is basically just a
+	// nop but ensures the pointerValue is kept alive:
+	//
+	//     __asm__ __volatile__("" : : "r"(pointerValue))
+	//
+	// It should be portable to basically everything as the "r" register type
+	// exists basically everywhere.
+	asmType := llvm.FunctionType(b.dataPtrType, []llvm.Type{b.dataPtrType}, false)
+	asmFn := llvm.InlineAsm(asmType, "", "=r,0", true, false, 0, false)
+	result := b.createCall(asmType, asmFn, []llvm.Value{pointerValue}, "")
+
+	b.CreateRet(result)
+}
+
 var mathToLLVMMapping = map[string]string{
 	"math.Ceil":  "llvm.ceil.f64",
 	"math.Exp":   "llvm.exp.f64",
@@ -218,7 +218,7 @@ func Version() int {
 	return major
 }

-// Return the byte order for the given target triple. Most targets are little
+// ByteOrder returns the byte order for the given target triple. Most targets are little
 // endian, but for example MIPS can be big-endian.
 func ByteOrder(target string) binary.ByteOrder {
 	if strings.HasPrefix(target, "mips-") {
@@ -253,6 +253,23 @@ func (c *compilerContext) maybeCreateSyntheticFunction(fn *ssa.Function, llvmFn
 	// The exception is the package initializer, which does appear in the
 	// *ssa.Package members and so shouldn't be created here.
 	if fn.Synthetic != "" && fn.Synthetic != "package initializer" && fn.Synthetic != "generic function" && fn.Synthetic != "range-over-func yield" {
+		if origin := fn.Origin(); origin != nil && origin.RelString(nil) == "internal/abi.Escape" {
+			// This is a special implementation or internal/abi.Escape, which
+			// can only really be implemented in the compiler.
+			// For simplicity we'll only implement pointer parameters for now.
+			if _, ok := fn.Params[0].Type().Underlying().(*types.Pointer); ok {
+				irbuilder := c.ctx.NewBuilder()
+				defer irbuilder.Dispose()
+				b := newBuilder(c, irbuilder, fn)
+				b.createAbiEscapeImpl()
+				llvmFn.SetLinkage(llvm.LinkOnceODRLinkage)
+				llvmFn.SetUnnamedAddr(true)
+			}
+			// If the parameter is not of a pointer type, it will be left
+			// unimplemented. This will result in a linker error if the function
+			// is really called, making it clear it needs to be implemented.
+			return
+		}
 		if len(fn.Blocks) == 0 {
 			c.addError(fn.Pos(), "missing function body")
 			return
@@ -613,7 +630,7 @@ func (c *compilerContext) addStandardAttributes(llvmFn llvm.Value) {
 // linkName is equal to .RelString(nil) on a global and extern is false, but for
 // some symbols this is different (due to //go:extern for example).
 type globalInfo struct {
-	linkName string // go:extern
+	linkName string // go:extern, go:linkname
 	extern   bool   // go:extern
 	align    int    // go:align
 	section  string // go:section
@@ -698,14 +715,14 @@ func (c *compilerContext) getGlobalInfo(g *ssa.Global) globalInfo {
 	// Check for //go: pragmas, which may change the link name (among others).
 	doc := c.astComments[info.linkName]
 	if doc != nil {
-		info.parsePragmas(doc)
+		info.parsePragmas(doc, c, g)
 	}
 	return info
 }

 // Parse //go: pragma comments from the source. In particular, it parses the
-// //go:extern pragma on globals.
-func (info *globalInfo) parsePragmas(doc *ast.CommentGroup) {
+// //go:extern and //go:linkname pragmas on globals.
+func (info *globalInfo) parsePragmas(doc *ast.CommentGroup, c *compilerContext, g *ssa.Global) {
 	for _, comment := range doc.List {
 		if !strings.HasPrefix(comment.Text, "//go:") {
 			continue
@@ -726,6 +743,17 @@ func (info *globalInfo) parsePragmas(doc *ast.CommentGroup) {
 			if len(parts) == 2 {
 				info.section = parts[1]
 			}
+		case "//go:linkname":
+			if len(parts) != 3 || parts[1] != g.Name() {
+				continue
+			}
+			// Only enable go:linkname when the package imports "unsafe".
+			// This is a slightly looser requirement than what gc uses: gc
+			// requires the file to import "unsafe", not the package as a
+			// whole.
+			if hasUnsafeImport(g.Pkg.Pkg) {
+				info.linkName = parts[2]
+			}
 		}
 	}
 }
@@ -1,6 +1,6 @@
 ; ModuleID = 'basic.go'
 source_filename = "basic.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 datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-i128:128-n32:64-S128-ni:1:10:20"
 target triple = "wasm32-unknown-wasi"

 %main.kv = type { float, i32, i32, i32 }
@@ -206,7 +206,7 @@ entry:
  ret void
 }

-attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #1 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #2 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #1 = { "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #2 = { nounwind "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
 attributes #3 = { nounwind }
@@ -1,6 +1,6 @@
 ; ModuleID = 'channel.go'
 source_filename = "channel.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 datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-i128:128-n32:64-S128-ni:1:10:20"
 target triple = "wasm32-unknown-wasi"

 %runtime.channelOp = type { ptr, ptr, i32, ptr }
@@ -82,11 +82,11 @@ entry:
  store i32 1, ptr %select.send.value, align 4
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %select.states.alloca)
  store ptr %ch1, ptr %select.states.alloca, align 4
-  %select.states.alloca.repack1 = getelementptr inbounds i8, ptr %select.states.alloca, i32 4
+  %select.states.alloca.repack1 = getelementptr inbounds nuw i8, ptr %select.states.alloca, i32 4
  store ptr %select.send.value, ptr %select.states.alloca.repack1, align 4
-  %0 = getelementptr inbounds i8, ptr %select.states.alloca, i32 8
+  %0 = getelementptr inbounds nuw i8, ptr %select.states.alloca, i32 8
  store ptr %ch2, ptr %0, align 4
-  %.repack3 = getelementptr inbounds i8, ptr %select.states.alloca, i32 12
+  %.repack3 = getelementptr inbounds nuw i8, ptr %select.states.alloca, i32 12
  store ptr null, ptr %.repack3, align 4
  %select.result = call { i32, i1 } @runtime.chanSelect(ptr undef, ptr nonnull %select.states.alloca, i32 2, i32 2, ptr null, i32 0, i32 0, ptr undef) #4
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %select.states.alloca)
@@ -107,8 +107,8 @@ select.body:                                      ; preds = %select.next

 declare { i32, i1 } @runtime.chanSelect(ptr, ptr, i32, i32, ptr, i32, i32, ptr) #1

-attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #1 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #2 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #1 = { "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #2 = { nounwind "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
 attributes #3 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
 attributes #4 = { nounwind }
@@ -27,7 +27,7 @@ entry:
  %0 = call ptr @llvm.stacksave.p0()
  call void @runtime.setupDeferFrame(ptr nonnull %deferframe.buf, ptr %0, ptr undef) #4
  store i32 0, ptr %defer.alloca, align 4
-  %defer.alloca.repack15 = getelementptr inbounds i8, ptr %defer.alloca, i32 4
+  %defer.alloca.repack15 = getelementptr inbounds nuw i8, ptr %defer.alloca, i32 4
  store ptr null, ptr %defer.alloca.repack15, align 4
  store ptr %defer.alloca, ptr %deferPtr, align 4
  %setjmp = call i32 asm "\0Amovs r0, #0\0Amov r2, pc\0Astr r2, [r1, #4]", "={r0},{r1},~{r1},~{r2},~{r3},~{r4},~{r5},~{r6},~{r7},~{r8},~{r9},~{r10},~{r11},~{r12},~{lr},~{q0},~{q1},~{q2},~{q3},~{q4},~{q5},~{q6},~{q7},~{q8},~{q9},~{q10},~{q11},~{q12},~{q13},~{q14},~{q15},~{cpsr},~{memory}"(ptr nonnull %deferframe.buf) #5
@@ -51,7 +51,7 @@ rundefers.loophead:                               ; preds = %3, %rundefers.block
  br i1 %stackIsNil, label %rundefers.end, label %rundefers.loop

 rundefers.loop:                                   ; preds = %rundefers.loophead
-  %stack.next.gep = getelementptr inbounds i8, ptr %2, i32 4
+  %stack.next.gep = getelementptr inbounds nuw i8, ptr %2, i32 4
  %stack.next = load ptr, ptr %stack.next.gep, align 4
  store ptr %stack.next, ptr %deferPtr, align 4
  %callback = load i32, ptr %2, align 4
@@ -87,7 +87,7 @@ rundefers.loophead6:                              ; preds = %5, %lpad
  br i1 %stackIsNil7, label %rundefers.end3, label %rundefers.loop5

 rundefers.loop5:                                  ; preds = %rundefers.loophead6
-  %stack.next.gep8 = getelementptr inbounds i8, ptr %4, i32 4
+  %stack.next.gep8 = getelementptr inbounds nuw i8, ptr %4, i32 4
  %stack.next9 = load ptr, ptr %stack.next.gep8, align 4
  store ptr %stack.next9, ptr %deferPtr, align 4
  %callback11 = load i32, ptr %4, align 4
@@ -144,11 +144,11 @@ entry:
  %0 = call ptr @llvm.stacksave.p0()
  call void @runtime.setupDeferFrame(ptr nonnull %deferframe.buf, ptr %0, ptr undef) #4
  store i32 0, ptr %defer.alloca, align 4
-  %defer.alloca.repack22 = getelementptr inbounds i8, ptr %defer.alloca, i32 4
+  %defer.alloca.repack22 = getelementptr inbounds nuw i8, ptr %defer.alloca, i32 4
  store ptr null, ptr %defer.alloca.repack22, align 4
  store ptr %defer.alloca, ptr %deferPtr, align 4
  store i32 1, ptr %defer.alloca2, align 4
-  %defer.alloca2.repack23 = getelementptr inbounds i8, ptr %defer.alloca2, i32 4
+  %defer.alloca2.repack23 = getelementptr inbounds nuw i8, ptr %defer.alloca2, i32 4
  store ptr %defer.alloca, ptr %defer.alloca2.repack23, align 4
  store ptr %defer.alloca2, ptr %deferPtr, align 4
  %setjmp = call i32 asm "\0Amovs r0, #0\0Amov r2, pc\0Astr r2, [r1, #4]", "={r0},{r1},~{r1},~{r2},~{r3},~{r4},~{r5},~{r6},~{r7},~{r8},~{r9},~{r10},~{r11},~{r12},~{lr},~{q0},~{q1},~{q2},~{q3},~{q4},~{q5},~{q6},~{q7},~{q8},~{q9},~{q10},~{q11},~{q12},~{q13},~{q14},~{q15},~{cpsr},~{memory}"(ptr nonnull %deferframe.buf) #5
@@ -172,7 +172,7 @@ rundefers.loophead:                               ; preds = %4, %3, %rundefers.b
  br i1 %stackIsNil, label %rundefers.end, label %rundefers.loop

 rundefers.loop:                                   ; preds = %rundefers.loophead
-  %stack.next.gep = getelementptr inbounds i8, ptr %2, i32 4
+  %stack.next.gep = getelementptr inbounds nuw i8, ptr %2, i32 4
  %stack.next = load ptr, ptr %stack.next.gep, align 4
  store ptr %stack.next, ptr %deferPtr, align 4
  %callback = load i32, ptr %2, align 4
@@ -218,7 +218,7 @@ rundefers.loophead10:                             ; preds = %7, %6, %lpad
  br i1 %stackIsNil11, label %rundefers.end7, label %rundefers.loop9

 rundefers.loop9:                                  ; preds = %rundefers.loophead10
-  %stack.next.gep12 = getelementptr inbounds i8, ptr %5, i32 4
+  %stack.next.gep12 = getelementptr inbounds nuw i8, ptr %5, i32 4
  %stack.next13 = load ptr, ptr %stack.next.gep12, align 4
  store ptr %stack.next13, ptr %deferPtr, align 4
  %callback15 = load i32, ptr %5, align 4
@@ -1,6 +1,6 @@
 ; ModuleID = 'float.go'
 source_filename = "float.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 datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-i128:128-n32:64-S128-ni:1:10:20"
 target triple = "wasm32-unknown-wasi"

 ; Function Attrs: allockind("alloc,zeroed") allocsize(0)
@@ -93,6 +93,6 @@ 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,-multivalue,-reference-types" }
-attributes #1 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #2 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #1 = { "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #2 = { nounwind "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
@@ -1,6 +1,6 @@
 ; ModuleID = 'func.go'
 source_filename = "func.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 datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-i128:128-n32:64-S128-ni:1:10:20"
 target triple = "wasm32-unknown-wasi"

 ; Function Attrs: allockind("alloc,zeroed") allocsize(0)
@@ -44,7 +44,7 @@ entry:
  ret void
 }

-attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #1 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #2 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #1 = { "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #2 = { nounwind "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
 attributes #3 = { nounwind }
@@ -1,6 +1,6 @@
 ; ModuleID = 'gc.go'
 source_filename = "gc.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 datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-i128:128-n32:64-S128-ni:1:10:20"
 target triple = "wasm32-unknown-wasi"

 %runtime._interface = type { ptr, ptr }
@@ -105,18 +105,18 @@ entry:
  %makeslice = call align 1 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
  store ptr %makeslice, ptr @main.slice1, align 4
-  store i32 5, ptr getelementptr inbounds (i8, ptr @main.slice1, i32 4), align 4
-  store i32 5, ptr getelementptr inbounds (i8, ptr @main.slice1, i32 8), align 4
+  store i32 5, ptr getelementptr inbounds nuw (i8, ptr @main.slice1, i32 4), align 4
+  store i32 5, ptr getelementptr inbounds nuw (i8, ptr @main.slice1, i32 8), align 4
  %makeslice1 = call align 4 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
  store ptr %makeslice1, ptr @main.slice2, align 4
-  store i32 5, ptr getelementptr inbounds (i8, ptr @main.slice2, i32 4), align 4
-  store i32 5, ptr getelementptr inbounds (i8, ptr @main.slice2, i32 8), align 4
+  store i32 5, ptr getelementptr inbounds nuw (i8, ptr @main.slice2, i32 4), align 4
+  store i32 5, ptr getelementptr inbounds nuw (i8, ptr @main.slice2, i32 8), align 4
  %makeslice3 = call align 4 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
  store ptr %makeslice3, ptr @main.slice3, align 4
-  store i32 5, ptr getelementptr inbounds (i8, ptr @main.slice3, i32 4), align 4
-  store i32 5, ptr getelementptr inbounds (i8, ptr @main.slice3, i32 8), align 4
+  store i32 5, ptr getelementptr inbounds nuw (i8, ptr @main.slice3, i32 4), align 4
+  store i32 5, ptr getelementptr inbounds nuw (i8, ptr @main.slice3, i32 8), align 4
  ret void
 }

@@ -127,7 +127,7 @@ entry:
  %0 = call align 8 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
  store double %v.r, ptr %0, align 8
-  %.repack1 = getelementptr inbounds i8, ptr %0, i32 8
+  %.repack1 = getelementptr inbounds nuw i8, ptr %0, i32 8
  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
@@ -135,7 +135,7 @@ entry:
  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,-multivalue,-reference-types" }
-attributes #1 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #2 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #1 = { "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #2 = { nounwind "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
 attributes #3 = { nounwind }
@@ -1,6 +1,6 @@
 ; ModuleID = 'go1.20.go'
 source_filename = "go1.20.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 datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-i128:128-n32:64-S128-ni:1:10:20"
 target triple = "wasm32-unknown-wasi"

 %runtime._string = type { ptr, i32 }
@@ -57,7 +57,7 @@ entry:
  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,-multivalue,-reference-types" }
-attributes #1 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #2 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #1 = { "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #2 = { nounwind "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
 attributes #3 = { nounwind }
@@ -1,6 +1,6 @@
 ; ModuleID = 'go1.21.go'
 source_filename = "go1.21.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 datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-i128:128-n32:64-S128-ni:1:10:20"
 target triple = "wasm32-unknown-wasi"

 %runtime._string = type { ptr, i32 }
@@ -86,7 +86,7 @@ entry:
  %stackalloc = alloca i8, align 1
  %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
+  %6 = select i1 %4, ptr %a.data, ptr %b.data
  call void @runtime.trackPointer(ptr %6, ptr nonnull %stackalloc, ptr undef) #5
  ret %runtime._string %5
 }
@@ -125,7 +125,7 @@ entry:
  %stackalloc = alloca i8, align 1
  %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
+  %6 = select i1 %4, ptr %a.data, ptr %b.data
  call void @runtime.trackPointer(ptr %6, ptr nonnull %stackalloc, ptr undef) #5
  ret %runtime._string %5
 }
@@ -171,9 +171,9 @@ 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,-multivalue,-reference-types" }
-attributes #1 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #2 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #1 = { "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #2 = { nounwind "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
 attributes #3 = { nocallback nofree nounwind willreturn memory(argmem: write) }
 attributes #4 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
 attributes #5 = { nounwind }
@@ -65,7 +65,7 @@ entry:
  store i32 3, ptr %n, align 4
  %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 i8, ptr %0, i32 4
+  %1 = getelementptr inbounds nuw i8, ptr %0, i32 4
  store ptr %n, ptr %1, align 4
  %stacksize = call i32 @"internal/task.getGoroutineStackSize"(i32 ptrtoint (ptr @"main.closureFunctionGoroutine$1$gowrapper" to i32), ptr undef) #9
  call void @"internal/task.start"(i32 ptrtoint (ptr @"main.closureFunctionGoroutine$1$gowrapper" to i32), ptr nonnull %0, i32 %stacksize, ptr undef) #9
@@ -87,7 +87,7 @@ entry:
 define linkonce_odr void @"main.closureFunctionGoroutine$1$gowrapper"(ptr %0) unnamed_addr #5 {
 entry:
  %1 = load i32, ptr %0, align 4
-  %2 = getelementptr inbounds i8, ptr %0, i32 4
+  %2 = getelementptr inbounds nuw i8, ptr %0, i32 4
  %3 = load ptr, ptr %2, align 4
  call void @"main.closureFunctionGoroutine$1"(i32 %1, ptr %3)
  ret void
@@ -104,9 +104,9 @@ define hidden void @main.funcGoroutine(ptr %fn.context, ptr %fn.funcptr, ptr %co
 entry:
  %0 = call align 4 dereferenceable(12) ptr @runtime.alloc(i32 12, ptr null, ptr undef) #9
  store i32 5, ptr %0, align 4
-  %1 = getelementptr inbounds i8, ptr %0, i32 4
+  %1 = getelementptr inbounds nuw i8, ptr %0, i32 4
  store ptr %fn.context, ptr %1, align 4
-  %2 = getelementptr inbounds i8, ptr %0, i32 8
+  %2 = getelementptr inbounds nuw i8, ptr %0, i32 8
  store ptr %fn.funcptr, ptr %2, align 4
  %stacksize = call i32 @"internal/task.getGoroutineStackSize"(i32 ptrtoint (ptr @main.funcGoroutine.gowrapper to i32), ptr undef) #9
  call void @"internal/task.start"(i32 ptrtoint (ptr @main.funcGoroutine.gowrapper to i32), ptr nonnull %0, i32 %stacksize, ptr undef) #9
@@ -117,9 +117,9 @@ entry:
 define linkonce_odr void @main.funcGoroutine.gowrapper(ptr %0) unnamed_addr #6 {
 entry:
  %1 = load i32, ptr %0, align 4
-  %2 = getelementptr inbounds i8, ptr %0, i32 4
+  %2 = getelementptr inbounds nuw i8, ptr %0, i32 4
  %3 = load ptr, ptr %2, align 4
-  %4 = getelementptr inbounds i8, ptr %0, i32 8
+  %4 = getelementptr inbounds nuw i8, ptr %0, i32 8
  %5 = load ptr, ptr %4, align 4
  call void %5(i32 %1, ptr %3) #9
  ret void
@@ -154,11 +154,11 @@ define hidden void @main.startInterfaceMethod(ptr %itf.typecode, ptr %itf.value,
 entry:
  %0 = call align 4 dereferenceable(16) ptr @runtime.alloc(i32 16, ptr null, ptr undef) #9
  store ptr %itf.value, ptr %0, align 4
-  %1 = getelementptr inbounds i8, ptr %0, i32 4
+  %1 = getelementptr inbounds nuw i8, ptr %0, i32 4
  store ptr @"main$string", ptr %1, align 4
-  %2 = getelementptr inbounds i8, ptr %0, i32 8
+  %2 = getelementptr inbounds nuw i8, ptr %0, i32 8
  store i32 4, ptr %2, align 4
-  %3 = getelementptr inbounds i8, ptr %0, i32 12
+  %3 = getelementptr inbounds nuw i8, ptr %0, i32 12
  store ptr %itf.typecode, ptr %3, align 4
  %stacksize = call i32 @"internal/task.getGoroutineStackSize"(i32 ptrtoint (ptr @"interface:{Print:func:{basic:string}{}}.Print$invoke$gowrapper" to i32), ptr undef) #9
  call void @"internal/task.start"(i32 ptrtoint (ptr @"interface:{Print:func:{basic:string}{}}.Print$invoke$gowrapper" to i32), ptr nonnull %0, i32 %stacksize, ptr undef) #9
@@ -171,11 +171,11 @@ declare void @"interface:{Print:func:{basic:string}{}}.Print$invoke"(ptr, ptr, i
 define linkonce_odr void @"interface:{Print:func:{basic:string}{}}.Print$invoke$gowrapper"(ptr %0) unnamed_addr #8 {
 entry:
  %1 = load ptr, ptr %0, align 4
-  %2 = getelementptr inbounds i8, ptr %0, i32 4
+  %2 = getelementptr inbounds nuw i8, ptr %0, i32 4
  %3 = load ptr, ptr %2, align 4
-  %4 = getelementptr inbounds i8, ptr %0, i32 8
+  %4 = getelementptr inbounds nuw i8, ptr %0, i32 8
  %5 = load i32, ptr %4, align 4
-  %6 = getelementptr inbounds i8, ptr %0, i32 12
+  %6 = getelementptr inbounds nuw i8, ptr %0, i32 12
  %7 = load ptr, ptr %6, align 4
  call void @"interface:{Print:func:{basic:string}{}}.Print$invoke"(ptr %1, ptr %3, i32 %5, ptr %7, ptr undef) #9
  ret void
@@ -1,6 +1,6 @@
 ; ModuleID = 'goroutine.go'
 source_filename = "goroutine.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 datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-i128:128-n32:64-S128-ni:1:10:20"
 target triple = "wasm32-unknown-wasi"

@"main$string" = internal unnamed_addr constant [4 x i8] c"test", align 1
@@ -72,7 +72,7 @@ entry:
  %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) #9
  store i32 5, ptr %0, align 4
-  %1 = getelementptr inbounds i8, ptr %0, i32 4
+  %1 = getelementptr inbounds nuw i8, ptr %0, i32 4
  store ptr %n, ptr %1, align 4
  call void @"internal/task.start"(i32 ptrtoint (ptr @"main.closureFunctionGoroutine$1$gowrapper" to i32), ptr nonnull %0, i32 65536, ptr undef) #9
  %2 = load i32, ptr %n, align 4
@@ -93,7 +93,7 @@ entry:
 define linkonce_odr void @"main.closureFunctionGoroutine$1$gowrapper"(ptr %0) unnamed_addr #5 {
 entry:
  %1 = load i32, ptr %0, align 4
-  %2 = getelementptr inbounds i8, ptr %0, i32 4
+  %2 = getelementptr inbounds nuw i8, ptr %0, i32 4
  %3 = load ptr, ptr %2, align 4
  call void @"main.closureFunctionGoroutine$1"(i32 %1, ptr %3)
  call void @runtime.deadlock(ptr undef) #9
@@ -113,9 +113,9 @@ entry:
  %0 = call align 4 dereferenceable(12) ptr @runtime.alloc(i32 12, ptr null, ptr undef) #9
  call void @runtime.trackPointer(ptr nonnull %0, ptr nonnull %stackalloc, ptr undef) #9
  store i32 5, ptr %0, align 4
-  %1 = getelementptr inbounds i8, ptr %0, i32 4
+  %1 = getelementptr inbounds nuw i8, ptr %0, i32 4
  store ptr %fn.context, ptr %1, align 4
-  %2 = getelementptr inbounds i8, ptr %0, i32 8
+  %2 = getelementptr inbounds nuw i8, ptr %0, i32 8
  store ptr %fn.funcptr, ptr %2, align 4
  call void @"internal/task.start"(i32 ptrtoint (ptr @main.funcGoroutine.gowrapper to i32), ptr nonnull %0, i32 65536, ptr undef) #9
  ret void
@@ -125,9 +125,9 @@ entry:
 define linkonce_odr void @main.funcGoroutine.gowrapper(ptr %0) unnamed_addr #6 {
 entry:
  %1 = load i32, ptr %0, align 4
-  %2 = getelementptr inbounds i8, ptr %0, i32 4
+  %2 = getelementptr inbounds nuw i8, ptr %0, i32 4
  %3 = load ptr, ptr %2, align 4
-  %4 = getelementptr inbounds i8, ptr %0, i32 8
+  %4 = getelementptr inbounds nuw i8, ptr %0, i32 8
  %5 = load ptr, ptr %4, align 4
  call void %5(i32 %1, ptr %3) #9
  call void @runtime.deadlock(ptr undef) #9
@@ -165,11 +165,11 @@ entry:
  %0 = call align 4 dereferenceable(16) ptr @runtime.alloc(i32 16, ptr null, ptr undef) #9
  call void @runtime.trackPointer(ptr nonnull %0, ptr nonnull %stackalloc, ptr undef) #9
  store ptr %itf.value, ptr %0, align 4
-  %1 = getelementptr inbounds i8, ptr %0, i32 4
+  %1 = getelementptr inbounds nuw i8, ptr %0, i32 4
  store ptr @"main$string", ptr %1, align 4
-  %2 = getelementptr inbounds i8, ptr %0, i32 8
+  %2 = getelementptr inbounds nuw i8, ptr %0, i32 8
  store i32 4, ptr %2, align 4
-  %3 = getelementptr inbounds i8, ptr %0, i32 12
+  %3 = getelementptr inbounds nuw i8, ptr %0, i32 12
  store ptr %itf.typecode, ptr %3, align 4
  call void @"internal/task.start"(i32 ptrtoint (ptr @"interface:{Print:func:{basic:string}{}}.Print$invoke$gowrapper" to i32), ptr nonnull %0, i32 65536, ptr undef) #9
  ret void
@@ -181,24 +181,24 @@ declare void @"interface:{Print:func:{basic:string}{}}.Print$invoke"(ptr, ptr, i
 define linkonce_odr void @"interface:{Print:func:{basic:string}{}}.Print$invoke$gowrapper"(ptr %0) unnamed_addr #8 {
 entry:
  %1 = load ptr, ptr %0, align 4
-  %2 = getelementptr inbounds i8, ptr %0, i32 4
+  %2 = getelementptr inbounds nuw i8, ptr %0, i32 4
  %3 = load ptr, ptr %2, align 4
-  %4 = getelementptr inbounds i8, ptr %0, i32 8
+  %4 = getelementptr inbounds nuw i8, ptr %0, i32 8
  %5 = load i32, ptr %4, align 4
-  %6 = getelementptr inbounds i8, ptr %0, i32 12
+  %6 = getelementptr inbounds nuw i8, ptr %0, i32 12
  %7 = load ptr, ptr %6, align 4
  call void @"interface:{Print:func:{basic:string}{}}.Print$invoke"(ptr %1, ptr %3, i32 %5, ptr %7, ptr undef) #9
  call void @runtime.deadlock(ptr undef) #9
  unreachable
 }

-attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #1 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #2 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #3 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "tinygo-gowrapper"="main.regularFunction" }
-attributes #4 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "tinygo-gowrapper"="main.inlineFunctionGoroutine$1" }
-attributes #5 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "tinygo-gowrapper"="main.closureFunctionGoroutine$1" }
-attributes #6 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "tinygo-gowrapper" }
-attributes #7 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "tinygo-invoke"="reflect/methods.Print(string)" "tinygo-methods"="reflect/methods.Print(string)" }
-attributes #8 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "tinygo-gowrapper"="interface:{Print:func:{basic:string}{}}.Print$invoke" }
+attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #1 = { "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #2 = { nounwind "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #3 = { nounwind "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "tinygo-gowrapper"="main.regularFunction" }
+attributes #4 = { nounwind "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "tinygo-gowrapper"="main.inlineFunctionGoroutine$1" }
+attributes #5 = { nounwind "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "tinygo-gowrapper"="main.closureFunctionGoroutine$1" }
+attributes #6 = { nounwind "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "tinygo-gowrapper" }
+attributes #7 = { "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "tinygo-invoke"="reflect/methods.Print(string)" "tinygo-methods"="reflect/methods.Print(string)" }
+attributes #8 = { nounwind "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "tinygo-gowrapper"="interface:{Print:func:{basic:string}{}}.Print$invoke" }
 attributes #9 = { nounwind }
@@ -1,6 +1,6 @@
 ; ModuleID = 'interface.go'
 source_filename = "interface.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 datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-i128:128-n32:64-S128-ni:1:10:20"
 target triple = "wasm32-unknown-wasi"

 %runtime._interface = type { ptr, ptr }
@@ -130,11 +130,11 @@ entry:

 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,-multivalue,-reference-types" }
-attributes #1 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #2 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #3 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "tinygo-methods"="reflect/methods.Error() string" }
-attributes #4 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "tinygo-methods"="reflect/methods.String() string" }
-attributes #5 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "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,-multivalue,-reference-types" "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,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #1 = { "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #2 = { nounwind "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #3 = { "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "tinygo-methods"="reflect/methods.Error() string" }
+attributes #4 = { "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "tinygo-methods"="reflect/methods.String() string" }
+attributes #5 = { "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "tinygo-invoke"="main.$methods.foo(int) uint8" "tinygo-methods"="reflect/methods.String() string; main.$methods.foo(int) uint8" }
+attributes #6 = { "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "tinygo-invoke"="reflect/methods.Error() string" "tinygo-methods"="reflect/methods.Error() string" }
 attributes #7 = { nounwind }
@@ -1,6 +1,6 @@
 ; ModuleID = 'pointer.go'
 source_filename = "pointer.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 datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-i128:128-n32:64-S128-ni:1:10:20"
 target triple = "wasm32-unknown-wasi"

 ; Function Attrs: allockind("alloc,zeroed") allocsize(0)
@@ -44,7 +44,7 @@ entry:
  ret ptr %x
 }

-attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #1 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #2 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #1 = { "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #2 = { nounwind "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
 attributes #3 = { nounwind }
@@ -1,6 +1,6 @@
 ; ModuleID = 'pragma.go'
 source_filename = "pragma.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 datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-i128:128-n32:64-S128-ni:1:10:20"
 target triple = "wasm32-unknown-wasi"

@extern_global = external global [0 x i8], align 1
@@ -93,13 +93,13 @@ entry:
  ret void
 }

-attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #1 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #2 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #3 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "wasm-export-name"="extern_func" }
-attributes #4 = { inlinehint nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #5 = { noinline nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #6 = { noinline nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "wasm-export-name"="exportedFunctionInSection" }
-attributes #7 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "wasm-import-module"="modulename" "wasm-import-name"="import1" }
-attributes #8 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "wasm-import-module"="foobar" "wasm-import-name"="imported" }
-attributes #9 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "wasm-export-name"="exported" }
+attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #1 = { "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #2 = { nounwind "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #3 = { nounwind "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "wasm-export-name"="extern_func" }
+attributes #4 = { inlinehint nounwind "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #5 = { noinline nounwind "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #6 = { noinline nounwind "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "wasm-export-name"="exportedFunctionInSection" }
+attributes #7 = { "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "wasm-import-module"="modulename" "wasm-import-name"="import1" }
+attributes #8 = { "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "wasm-import-module"="foobar" "wasm-import-name"="imported" }
+attributes #9 = { nounwind "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "wasm-export-name"="exported" }
@@ -1,6 +1,6 @@
 ; ModuleID = 'slice.go'
 source_filename = "slice.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 datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-i128:128-n32:64-S128-ni:1:10:20"
 target triple = "wasm32-unknown-wasi"

 ; Function Attrs: allockind("alloc,zeroed") allocsize(0)
@@ -51,9 +51,9 @@ entry:
  %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) #3
  store i32 1, ptr %varargs, align 4
-  %0 = getelementptr inbounds i8, ptr %varargs, i32 4
+  %0 = getelementptr inbounds nuw i8, ptr %varargs, i32 4
  store i32 2, ptr %0, align 4
-  %1 = getelementptr inbounds i8, ptr %varargs, i32 8
+  %1 = getelementptr inbounds nuw i8, ptr %varargs, i32 8
  store i32 3, ptr %1, align 4
  %append.new = call { ptr, i32, i32 } @runtime.sliceAppend(ptr %ints.data, ptr nonnull %varargs, i32 %ints.len, i32 %ints.cap, i32 3, i32 4, ptr undef) #3
  %append.newPtr = extractvalue { ptr, i32, i32 } %append.new, 0
@@ -322,7 +322,7 @@ 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,-multivalue,-reference-types" }
-attributes #1 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #2 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #1 = { "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #2 = { nounwind "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
 attributes #3 = { nounwind }
@@ -1,6 +1,6 @@
 ; ModuleID = 'string.go'
 source_filename = "string.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 datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-i128:128-n32:64-S128-ni:1:10:20"
 target triple = "wasm32-unknown-wasi"

 %runtime._string = type { ptr, i32 }
@@ -84,11 +84,11 @@ declare i1 @runtime.stringLess(ptr, i32, ptr, i32, ptr) #1
 define hidden i8 @main.stringLookup(ptr %s.data, i32 %s.len, i8 %x, ptr %context) unnamed_addr #2 {
 entry:
  %0 = zext i8 %x to i32
-  %.not = icmp ult i32 %0, %s.len
+  %.not = icmp ugt i32 %s.len, %0
  br i1 %.not, label %lookup.next, label %lookup.throw

 lookup.next:                                      ; preds = %entry
-  %1 = getelementptr inbounds i8, ptr %s.data, i32 %0
+  %1 = getelementptr inbounds nuw i8, ptr %s.data, i32 %0
  %2 = load i8, ptr %1, align 1
  ret i8 %2

@@ -97,7 +97,7 @@ 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,-multivalue,-reference-types" }
-attributes #1 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #2 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #1 = { "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #2 = { nounwind "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
 attributes #3 = { nounwind }
@@ -1,6 +1,6 @@
 ; ModuleID = 'zeromap.go'
 source_filename = "zeromap.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 datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-i128:128-n32:64-S128-ni:1:10:20"
 target triple = "wasm32-unknown-wasi"

 %main.hasPadding = type { i1, i32, i1 }
@@ -27,9 +27,9 @@ entry:
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %hashmap.value)
  call void @llvm.lifetime.start.p0(i64 12, ptr nonnull %hashmap.key)
  store %main.hasPadding %2, ptr %hashmap.key, align 4
-  %3 = getelementptr inbounds i8, ptr %hashmap.key, i32 1
+  %3 = getelementptr inbounds nuw i8, ptr %hashmap.key, i32 1
  call void @runtime.memzero(ptr nonnull %3, i32 3, ptr undef) #5
-  %4 = getelementptr inbounds i8, ptr %hashmap.key, i32 9
+  %4 = getelementptr inbounds nuw i8, ptr %hashmap.key, i32 9
  call void @runtime.memzero(ptr nonnull %4, i32 3, ptr undef) #5
  %5 = call i1 @runtime.hashmapBinaryGet(ptr %m, ptr nonnull %hashmap.key, ptr nonnull %hashmap.value, i32 4, ptr undef) #5
  call void @llvm.lifetime.end.p0(i64 12, ptr nonnull %hashmap.key)
@@ -60,9 +60,9 @@ entry:
  store i32 5, ptr %hashmap.value, align 4
  call void @llvm.lifetime.start.p0(i64 12, ptr nonnull %hashmap.key)
  store %main.hasPadding %2, ptr %hashmap.key, align 4
-  %3 = getelementptr inbounds i8, ptr %hashmap.key, i32 1
+  %3 = getelementptr inbounds nuw i8, ptr %hashmap.key, i32 1
  call void @runtime.memzero(ptr nonnull %3, i32 3, ptr undef) #5
-  %4 = getelementptr inbounds i8, ptr %hashmap.key, i32 9
+  %4 = getelementptr inbounds nuw i8, ptr %hashmap.key, i32 9
  call void @runtime.memzero(ptr nonnull %4, i32 3, ptr undef) #5
  call void @runtime.hashmapBinarySet(ptr %m, ptr nonnull %hashmap.key, ptr nonnull %hashmap.value, ptr undef) #5
  call void @llvm.lifetime.end.p0(i64 12, ptr nonnull %hashmap.key)
@@ -81,16 +81,16 @@ entry:
  call void @llvm.lifetime.start.p0(i64 24, ptr nonnull %hashmap.key)
  %s.elt = extractvalue [2 x %main.hasPadding] %s, 0
  store %main.hasPadding %s.elt, ptr %hashmap.key, align 4
-  %hashmap.key.repack1 = getelementptr inbounds i8, ptr %hashmap.key, i32 12
+  %hashmap.key.repack1 = getelementptr inbounds nuw i8, ptr %hashmap.key, i32 12
  %s.elt2 = extractvalue [2 x %main.hasPadding] %s, 1
  store %main.hasPadding %s.elt2, ptr %hashmap.key.repack1, align 4
-  %0 = getelementptr inbounds i8, ptr %hashmap.key, i32 1
+  %0 = getelementptr inbounds nuw i8, ptr %hashmap.key, i32 1
  call void @runtime.memzero(ptr nonnull %0, i32 3, ptr undef) #5
-  %1 = getelementptr inbounds i8, ptr %hashmap.key, i32 9
+  %1 = getelementptr inbounds nuw i8, ptr %hashmap.key, i32 9
  call void @runtime.memzero(ptr nonnull %1, i32 3, ptr undef) #5
-  %2 = getelementptr inbounds i8, ptr %hashmap.key, i32 13
+  %2 = getelementptr inbounds nuw i8, ptr %hashmap.key, i32 13
  call void @runtime.memzero(ptr nonnull %2, i32 3, ptr undef) #5
-  %3 = getelementptr inbounds i8, ptr %hashmap.key, i32 21
+  %3 = getelementptr inbounds nuw i8, ptr %hashmap.key, i32 21
  call void @runtime.memzero(ptr nonnull %3, i32 3, ptr undef) #5
  %4 = call i1 @runtime.hashmapBinaryGet(ptr %m, ptr nonnull %hashmap.key, ptr nonnull %hashmap.value, i32 4, ptr undef) #5
  call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %hashmap.key)
@@ -109,16 +109,16 @@ entry:
  call void @llvm.lifetime.start.p0(i64 24, ptr nonnull %hashmap.key)
  %s.elt = extractvalue [2 x %main.hasPadding] %s, 0
  store %main.hasPadding %s.elt, ptr %hashmap.key, align 4
-  %hashmap.key.repack1 = getelementptr inbounds i8, ptr %hashmap.key, i32 12
+  %hashmap.key.repack1 = getelementptr inbounds nuw i8, ptr %hashmap.key, i32 12
  %s.elt2 = extractvalue [2 x %main.hasPadding] %s, 1
  store %main.hasPadding %s.elt2, ptr %hashmap.key.repack1, align 4
-  %0 = getelementptr inbounds i8, ptr %hashmap.key, i32 1
+  %0 = getelementptr inbounds nuw i8, ptr %hashmap.key, i32 1
  call void @runtime.memzero(ptr nonnull %0, i32 3, ptr undef) #5
-  %1 = getelementptr inbounds i8, ptr %hashmap.key, i32 9
+  %1 = getelementptr inbounds nuw i8, ptr %hashmap.key, i32 9
  call void @runtime.memzero(ptr nonnull %1, i32 3, ptr undef) #5
-  %2 = getelementptr inbounds i8, ptr %hashmap.key, i32 13
+  %2 = getelementptr inbounds nuw i8, ptr %hashmap.key, i32 13
  call void @runtime.memzero(ptr nonnull %2, i32 3, ptr undef) #5
-  %3 = getelementptr inbounds i8, ptr %hashmap.key, i32 21
+  %3 = getelementptr inbounds nuw i8, ptr %hashmap.key, i32 21
  call void @runtime.memzero(ptr nonnull %3, i32 3, ptr undef) #5
  call void @runtime.hashmapBinarySet(ptr %m, ptr nonnull %hashmap.key, ptr nonnull %hashmap.value, ptr undef) #5
  call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %hashmap.key)
@@ -132,9 +132,9 @@ entry:
  ret void
 }

-attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #1 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #2 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #3 = { noinline nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #1 = { "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #2 = { nounwind "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #3 = { noinline nounwind "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
 attributes #4 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
 attributes #5 = { nounwind }
@@ -5,8 +5,6 @@ go 1.22.0
 require (
 	github.com/aykevl/go-wasm v0.0.2-0.20250317121156-42b86c494139
 	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/gofrs/flock v0.8.1
 	github.com/google/shlex v0.0.0-20181106134648-c34317bd91bf
 	github.com/inhies/go-bytesize v0.0.0-20220417184213-4913239db9cf
@@ -24,13 +22,7 @@ require (
 )

 require (
-	github.com/chromedp/sysutil v1.0.0 // indirect
 	github.com/creack/goselect v0.1.2 // 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/stretchr/testify v1.8.4 // indirect
 	golang.org/x/text v0.22.0 // indirect
@@ -2,33 +2,16 @@ github.com/aykevl/go-wasm v0.0.2-0.20250317121156-42b86c494139 h1:2O/WuAt8J5id3k
 github.com/aykevl/go-wasm v0.0.2-0.20250317121156-42b86c494139/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/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=
-github.com/chromedp/chromedp v0.7.6 h1:2juGaktzjwULlsn+DnvIZXFUckEp5xs+GOBroaea+jA=
-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/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 v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-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=
-github.com/gobwas/pool v0.2.1/go.mod h1:q8bcK0KcYlCgd9e7WYLm9LpyS+YeLd8JVDW6WezmKEw=
-github.com/gobwas/ws v1.1.0 h1:7RFti/xnNkMJnrK7D1yQ/iCIB5OrrY/54/H930kIbHA=
-github.com/gobwas/ws v1.1.0/go.mod h1:nzvNcVha5eUziGrbxFCo6qFIojQHjJV5cLYIbezhfL0=
 github.com/gofrs/flock v0.8.1 h1:+gYjHKf32LDeiEEFhQaotPbLuUXjY5ZqxKgXy7n59aw=
 github.com/gofrs/flock v0.8.1/go.mod h1:F1TvTiK9OcQqauNUHlbJvyl9Qa1QvF/gOUDKA14jxHU=
 github.com/google/shlex v0.0.0-20181106134648-c34317bd91bf h1:7+FW5aGwISbqUtkfmIpZJGRgNFg2ioYPvFaUxdqpDsg=
 github.com/google/shlex v0.0.0-20181106134648-c34317bd91bf/go.mod h1:RpwtwJQFrIEPstU94h88MWPXP2ektJZ8cZ0YntAmXiE=
 github.com/inhies/go-bytesize v0.0.0-20220417184213-4913239db9cf h1:FtEj8sfIcaaBfAKrE1Cwb61YDtYq9JxChK1c7AKce7s=
 github.com/inhies/go-bytesize v0.0.0-20220417184213-4913239db9cf/go.mod h1:yrqSXGoD/4EKfF26AOGzscPOgTTJcyAwM2rpixWT+t4=
-github.com/josharian/intern v1.0.0 h1:vlS4z54oSdjm0bgjRigI+G1HpF+tI+9rE5LLzOg8HmY=
-github.com/josharian/intern v1.0.0/go.mod h1:5DoeVV0s6jJacbCEi61lwdGj/aVlrQvzHFFd8Hwg//Y=
-github.com/mailru/easyjson v0.7.7 h1:UGYAvKxe3sBsEDzO8ZeWOSlIQfWFlxbzLZe7hwFURr0=
-github.com/mailru/easyjson v0.7.7/go.mod h1:xzfreul335JAWq5oZzymOObrkdz5UnU4kGfJJLY9Nlc=
 github.com/marcinbor85/gohex v0.0.0-20200531091804-343a4b548892 h1:6J+qramlHVLmiBOgRiBOnQkno8uprqG6YFFQTt6uYIw=
 github.com/marcinbor85/gohex v0.0.0-20200531091804-343a4b548892/go.mod h1:Pb6XcsXyropB9LNHhnqaknG/vEwYztLkQzVCHv8sQ3M=
 github.com/mattn/go-colorable v0.1.4/go.mod h1:U0ppj6V5qS13XJ6of8GYAs25YV2eR4EVcfRqFIhoBtE=
@@ -42,8 +25,6 @@ github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D
 github.com/mattn/go-runewidth v0.0.7/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/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/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=
@@ -63,8 +44,6 @@ golang.org/x/sync v0.11.0/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=
-golang.org/x/sys v0.0.0-20201207223542-d4d67f95c62d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-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 v0.30.0 h1:QjkSwP/36a20jFYWkSue1YwXzLmsV5Gfq7Eiy72C1uc=
@@ -10,7 +10,7 @@ import (

 // Version of TinyGo.
 // Update this value before release of new version of software.
-const version = "0.39.0-dev"
+const version = "0.40.0-dev"

 // Return TinyGo version, either in the form 0.30.0 or as a development version
 // (like 0.30.0-dev-abcd012).
@@ -577,7 +577,7 @@ func (r *runner) run(fn *function, params []value, parentMem *memoryView, indent
 						// runtime instead of at compile time. But we need to
 						// revert any changes made by the call first.
 						if r.debug {
-							fmt.Fprintln(os.Stderr, indent+"!! revert because of error:", callErr.Err)
+							fmt.Fprintln(os.Stderr, indent+"!! revert because of error:", callErr.Error())
 						}
 						callMem.revert()
 						err := r.runAtRuntime(fn, inst, locals, &mem, indent)
@@ -10,7 +10,7 @@ target triple = "x86_64--linux"
@main.exposedValue2 = local_unnamed_addr global i16 0
@main.insertedValue = local_unnamed_addr global { i8, i32, { float, { i64, i16 } } } zeroinitializer
@main.gepArray = local_unnamed_addr global [8 x i8] zeroinitializer
-@main.negativeGEP = global ptr getelementptr inbounds (i8, ptr @main.negativeGEP, i64 2)
+@main.negativeGEP = global ptr getelementptr inbounds nuw (i8, ptr @main.negativeGEP, i64 2)

 declare void @runtime.printint64(i64) unnamed_addr

@@ -5,7 +5,7 @@ target triple = "x86_64--linux"
@ptrToIntResult = local_unnamed_addr global i8 2
@pointerTagResult = local_unnamed_addr global i64 2
@someArray = internal global { i16, i8, i8 } zeroinitializer
-@someArrayPointer = local_unnamed_addr global ptr getelementptr inbounds (i8, ptr @someArray, i64 2)
+@someArrayPointer = local_unnamed_addr global ptr getelementptr inbounds nuw (i8, ptr @someArray, i64 2)

 define void @runtime.initAll() local_unnamed_addr {
  ret void
@@ -291,7 +291,8 @@ func Test(pkgName string, stdout, stderr io.Writer, options *compileopts.Options
 	})

 	if testConfig.CompileOnly {
-		return true, nil
+		// Return the compiler error, if there is one.
+		return true, err
 	}

 	importPath := strings.TrimSuffix(result.ImportPath, ".test")
@@ -339,8 +340,17 @@ func dirsToModuleRootAbs(maindir, modroot string) []string {
 	return dirs
 }

+// validateOutputFormat checks if the output file extension matches the expected format
+func validateOutputFormat(outpath, expectedExt string) error {
+	actualExt := filepath.Ext(outpath)
+	if actualExt != expectedExt {
+		return fmt.Errorf("output format %s does not match target format %s", actualExt, expectedExt)
+	}
+	return nil
+}
+
 // Flash builds and flashes the built binary to the given serial port.
-func Flash(pkgName, port string, options *compileopts.Options) error {
+func Flash(pkgName, port, outpath string, options *compileopts.Options) error {
 	config, err := builder.NewConfig(options)
 	if err != nil {
 		return err
@@ -389,13 +399,24 @@ func Flash(pkgName, port string, options *compileopts.Options) error {
 	if !options.Work {
 		defer os.RemoveAll(tmpdir)
 	}
-
+	// Validate output format before building
+	if outpath != "" {
+		if err := validateOutputFormat(outpath, fileExt); err != nil {
+			return err
+		}
+	}
 	// Build the binary.
 	result, err := builder.Build(pkgName, fileExt, tmpdir, config)
 	if err != nil {
 		return err
 	}

+	// Save output file if specified (after build, before flashing)
+	if outpath != "" {
+		if err := copyFile(result.Binary, outpath); err != nil {
+			return fmt.Errorf("failed to save output file: %v", err)
+		}
+	}
 	// do we need port reset to put MCU into bootloader mode?
 	if config.Target.PortReset == "true" && flashMethod != "openocd" {
 		port, err := getDefaultPort(port, config.Target.SerialPort)
@@ -1297,6 +1318,11 @@ extension at all.`
 			(https://tinygo.org/docs/reference/microcontrollers/).
 			Examples: "arduino-nano", "d1mini", "xiao".

+	-o={filename}:
+			Save the built binary to the specified output file. The file
+			format must match the target's expected format (e.g., .hex,
+			.uf2). Both flashing and saving will be performed.
+
 	-monitor: 
 			Start the serial monitor (see below) immediately after
 			flashing. However, some microcontrollers need a split second
@@ -1627,7 +1653,7 @@ func main() {
 		flag.BoolVar(&flagTest, "test", false, "supply -test flag to go list")
 	}
 	var outpath string
-	if command == "help" || command == "build" || command == "test" {
+	if command == "help" || command == "build" || command == "test" || command == "flash" {
 		flag.StringVar(&outpath, "o", "", "output filename")
 	}

@@ -1778,7 +1804,7 @@ func main() {
 	case "flash", "gdb", "lldb":
 		pkgName := filepath.ToSlash(flag.Arg(0))
 		if command == "flash" {
-			err := Flash(pkgName, *port, options)
+			err := Flash(pkgName, *port, outpath, options)
 			printBuildOutput(err, *flagJSON)
 		} else {
 			if !options.Debug {
@@ -1864,6 +1890,7 @@ func main() {
 						wd = ""
 					}
 					diagnostics.CreateDiagnostics(err).WriteTo(os.Stderr, wd)
+					os.Exit(1)
 				}
 				if !passed {
 					select {
@@ -35,8 +35,8 @@ func Monitor(executable, port string, config *compileopts.Config) error {
 		// Use the RTT interface, which is documented (in part) here:
 		// https://wiki.segger.com/RTT

-		// Try to find the "machine.rttSerialInstance" symbol, which is the RTT
-		// control block.
+		// Try to find the "_SEGGER_RTT" symbol (machine.rttSerialInstance)
+		// symbol, which is the RTT control block.
 		file, err := elf.Open(executable)
 		if err != nil {
 			return fmt.Errorf("could not open ELF file to determine RTT control block: %w", err)
@@ -48,7 +48,7 @@ func Monitor(executable, port string, config *compileopts.Config) error {
 		}
 		var address uint64
 		for _, symbol := range symbols {
-			if symbol.Name == "machine.rttSerialInstance" {
+			if symbol.Name == "_SEGGER_RTT" {
 				address = symbol.Value
 				break
 			}
@@ -63,6 +63,10 @@ func SecCertificateCopyData(cert CFRef) ([]byte, error) {
 	return nil, errors.New("not implemented")
 }

+func SecTrustCopyCertificateChain(trustObj CFRef) (CFRef, error) {
+	return 0, errors.New("not implemented")
+}
+
 func SecTrustEvaluateWithError(trustObj CFRef) (int, error) {
 	return 0, errors.New("not implemented")
 }
@@ -8,3 +8,10 @@ import "unsafe"
 func NoEscape(p unsafe.Pointer) unsafe.Pointer {
 	return p
 }
+
+func Escape[T any](x T) T {
+	// This function is either implemented in the compiler, or left undefined
+	// for some variation of T. The body of this function should not be compiled
+	// as-is.
+	panic("internal/abi.Escape: unreachable (implemented in the compiler)")
+}
@@ -58,6 +58,7 @@ void tinygo_task_init(void *mainTask, pthread_t *thread, int *numCPU, void *cont
    // Using pthread_kill, we can still send the signal to a specific thread.
    struct sigaction act = { 0 };
    act.sa_handler = tinygo_task_gc_pause;
+    act.sa_flags = SA_RESTART;
    sigaction(taskPauseSignal, &act, NULL);

    // Obtain the number of CPUs available on program start (for NumCPU).
@@ -100,7 +101,7 @@ static void* start_wrapper(void *arg) {
 };

 // Start a new goroutine in an OS thread.
-int tinygo_task_start(uintptr_t fn, void *args, void *task, pthread_t *thread, uintptr_t *stackTop, void *context) {
+int tinygo_task_start(uintptr_t fn, void *args, void *task, pthread_t *thread, uintptr_t *stackTop, uintptr_t stackSize, void *context) {
    // Sanity check. Should get optimized away.
    if (sizeof(pthread_t) != sizeof(void*)) {
        __builtin_trap();
@@ -117,7 +118,11 @@ int tinygo_task_start(uintptr_t fn, void *args, void *task, pthread_t *thread, u
    #else
    sem_init(&state.startlock, 0, 0);
    #endif
-    int result = pthread_create(thread, NULL, &start_wrapper, &state);
+    pthread_attr_t attrs;
+    pthread_attr_init(&attrs);
+    pthread_attr_setstacksize(&attrs, stackSize);
+    int result = pthread_create(thread, &attrs, &start_wrapper, &state);
+    pthread_attr_destroy(&attrs);

    // Wait until the thread has been created and read all state_pass variables.
    #if __APPLE__
@@ -109,7 +109,7 @@ func start(fn uintptr, args unsafe.Pointer, stackSize uintptr) {
 	// and the stop-the-world GC won't see threads that haven't started yet or
 	// are not fully started yet.
 	activeTaskLock.Lock()
-	errCode := tinygo_task_start(fn, args, t, &t.state.thread, &t.state.stackTop)
+	errCode := tinygo_task_start(fn, args, t, &t.state.thread, &t.state.stackTop, stackSize)
 	if errCode != 0 {
 		runtimePanic("could not start thread")
 	}
@@ -266,7 +266,7 @@ func tinygo_task_init(t *Task, thread *threadID, numCPU *int32)
 // Here same as for tinygo_task_init.
 //
 //go:linkname tinygo_task_start tinygo_task_start
-func tinygo_task_start(fn uintptr, args unsafe.Pointer, t *Task, thread *threadID, stackTop *uintptr) int32
+func tinygo_task_start(fn uintptr, args unsafe.Pointer, t *Task, thread *threadID, stackTop *uintptr, stackSize uintptr) int32

 // Pause the thread by sending it a signal.
 //
@@ -15,8 +15,8 @@ const (
 	P09 Pin = 9
 	P10 Pin = 10
 	P11 Pin = 11
-	P12 Pin = 12
-	P13 Pin = 13
+	P12 Pin = 12 // peripherals: I2C0 SDA
+	P13 Pin = 13 // peripherals: I2C0 SCL
 	P14 Pin = 14
 	P15 Pin = 15
 	P16 Pin = 16
@@ -0,0 +1,22 @@
+//go:build gopher_arcade
+
+package machine
+
+// Return the current CPU frequency in hertz.
+func CPUFrequency() uint32 {
+	return 8000000
+}
+
+const (
+	P5 Pin = PB0
+	P6 Pin = PB1
+	P7 Pin = PB2
+	P2 Pin = PB3
+	P3 Pin = PB4
+	P1 Pin = PB5
+
+	LED          = P1
+	BUTTON_LEFT  = P7
+	BUTTON_RIGHT = P5
+	SPEAKER      = P6
+)
@@ -0,0 +1,183 @@
+//go:build metro_rp2350
+
+package machine
+
+// GPIO pins
+const (
+	GP0  Pin = GPIO0
+	GP1  Pin = GPIO1
+	GP2  Pin = GPIO2
+	GP3  Pin = GPIO3
+	GP4  Pin = GPIO4
+	GP5  Pin = GPIO5
+	GP6  Pin = GPIO6
+	GP7  Pin = GPIO7
+	GP8  Pin = GPIO8
+	GP9  Pin = GPIO9
+	GP10 Pin = GPIO10
+	GP11 Pin = GPIO11
+	GP12 Pin = GPIO12
+	GP13 Pin = GPIO13
+	GP14 Pin = GPIO14
+	GP15 Pin = GPIO15
+	GP16 Pin = GPIO16
+	GP17 Pin = GPIO17
+	GP18 Pin = GPIO18
+	GP19 Pin = GPIO19
+	GP20 Pin = GPIO20
+	GP21 Pin = GPIO21
+	GP22 Pin = GPIO22
+	GP23 Pin = GPIO23
+	GP24 Pin = GPIO24
+	GP25 Pin = GPIO25
+	GP26 Pin = GPIO26
+	GP27 Pin = GPIO27
+	GP28 Pin = GPIO28
+	GP29 Pin = GPIO29
+	GP30 Pin = GPIO30
+	GP31 Pin = GPIO31
+	GP32 Pin = GPIO32
+	GP33 Pin = GPIO33
+	GP34 Pin = GPIO34
+	GP35 Pin = GPIO35
+	GP36 Pin = GPIO36
+	GP37 Pin = GPIO37
+	GP38 Pin = GPIO38
+	GP39 Pin = GPIO39
+	GP40 Pin = GPIO40
+	GP41 Pin = GPIO41
+	GP42 Pin = GPIO42
+	GP43 Pin = GPIO43
+	GP44 Pin = GPIO44
+	GP45 Pin = GPIO45
+	GP46 Pin = GPIO46
+
+	// Boot button
+	BUTTON Pin = GPIO24
+
+	// Onboard LED
+	LED Pin = GPIO23
+
+	// Onboard NeoPixel
+	NEOPIXEL Pin = GPIO25
+	WS2812   Pin = GPIO25
+
+	// Onboard crystal oscillator frequency, in MHz.
+	xoscFreq = 12 // MHz
+)
+
+// Arduino-header digital pins
+const (
+	RX  Pin = GPIO1
+	TX  Pin = GPIO0
+	D2  Pin = GPIO2
+	D3  Pin = GPIO3
+	D4  Pin = GPIO4
+	D5  Pin = GPIO5
+	D6  Pin = GPIO6
+	D7  Pin = GPIO7
+	D8  Pin = GPIO8
+	D9  Pin = GPIO9
+	D10 Pin = GPIO10
+	D11 Pin = GPIO11
+	D22 Pin = GPIO22
+	D23 Pin = GPIO23
+)
+
+// Arduino-header analog pins
+const (
+	A0 Pin = GPIO41
+	A1 Pin = GPIO42
+	A2 Pin = GPIO43
+	A3 Pin = GPIO44
+	A4 Pin = GPIO45
+	A5 Pin = GPIO46
+)
+
+// I2C Default pins on Raspberry Pico.
+const (
+	I2C0_SDA_PIN = GP20
+	I2C0_SCL_PIN = GP21
+
+	I2C1_SDA_PIN = GP2
+	I2C1_SCL_PIN = GP3
+)
+
+// SPI default pins
+const (
+	// Default Serial Clock Bus 0 for SPI communications
+	SPI0_SCK_PIN = GPIO18
+	// Default Serial Out Bus 0 for SPI communications
+	SPI0_SDO_PIN = GPIO19 // Tx
+	// Default Serial In Bus 0 for SPI communications
+	SPI0_SDI_PIN = GPIO16 // Rx
+
+	// Default Serial Clock Bus 1 for SPI communications
+	SPI1_SCK_PIN = GPIO30
+	// Default Serial Out Bus 1 for SPI communications
+	SPI1_SDO_PIN = GPIO31 // Tx
+	// Default Serial In Bus 1 for SPI communications
+	SPI1_SDI_PIN = GPIO28 // Rx
+
+	// SPI header pins
+	MOSI Pin = SPI1_SDO_PIN
+	MISO Pin = SPI1_SDI_PIN
+	SCK  Pin = SPI1_SCK_PIN
+)
+
+// SD card reader pins
+const (
+	SD_SCK         = GPIO34
+	SD_MOSI        = GPIO35
+	SD_MISO        = GPIO36
+	SDIO_DATA1     = GPIO37
+	SDIO_DATA2     = GPIO38
+	SD_CS          = GPIO39
+	SD_CARD_DETECT = GPIO40
+)
+
+// HSTX pins
+const (
+	CKN Pin = GPIO15
+	CKP Pin = GPIO14
+	D0N Pin = GPIO19
+	D0P Pin = GPIO18
+	D1N Pin = GPIO17
+	D1P Pin = GPIO16
+	D2N Pin = GPIO13
+	D2P Pin = GPIO12
+	D26 Pin = GPIO26
+	D27 Pin = GPIO27
+	SCL Pin = GPIO21
+	SDA Pin = GPIO20
+)
+
+// USB host header pins
+const (
+	USB_HOST_DATA_PLUS  Pin = GPIO32
+	USB_HOST_DATA_MINUS Pin = GPIO33
+	USB_HOST_5V_POWER   Pin = GPIO29
+)
+
+// UART pins
+const (
+	UART0_TX_PIN = GPIO0
+	UART0_RX_PIN = GPIO1
+	UART1_TX_PIN = GPIO8
+	UART1_RX_PIN = GPIO9
+	UART_TX_PIN  = UART0_TX_PIN
+	UART_RX_PIN  = UART0_RX_PIN
+)
+
+var DefaultUART = UART0
+
+// USB identifiers
+const (
+	usb_STRING_PRODUCT      = "Metro RP2350"
+	usb_STRING_MANUFACTURER = "Adafruit"
+)
+
+var (
+	usb_VID uint16 = 0x239A
+	usb_PID uint16 = 0x814E
+)
@@ -78,14 +78,14 @@ func (i2c *I2C) Tx(addr uint16, w, r []byte) (err error) {
 		// Allow scheduler to run
 		gosched()

-		// Handle errors by ensuring STOP sent on bus
-		if i2c.Bus.EVENTS_ERROR.Get() != 0 {
+		// Handle first occurrence of error by ensuring STOP sent on bus
+		if err == nil && i2c.Bus.EVENTS_ERROR.Get() != 0 {
+			err = twiCError(i2c.Bus.ERRORSRC.Get())
 			if i2c.Bus.EVENTS_STOPPED.Get() == 0 {
 				// STOP cannot be sent during SUSPEND
 				i2c.Bus.TASKS_RESUME.Set(1)
 				i2c.Bus.TASKS_STOP.Set(1)
 			}
-			err = twiCError(i2c.Bus.ERRORSRC.Get())
 		}
 	}

@@ -58,6 +58,10 @@ func machineInit() {

 	// Peripheral clocks should now all be running
 	unresetBlockWait(RESETS_RESET_Msk)
+
+	// DBGPAUSE pauses the timer when a debugger is connected. This prevents
+	// sleep functions from ever returning, so disable it.
+	timer.setDbgPause(false)
 }

 //go:linkname ticks runtime.machineTicks
@@ -100,7 +100,8 @@ func ReadTemperature() (millicelsius int32) {
 	rp.ADC.CS.SetBits(rp.ADC_CS_TS_EN)

 	// T = 27 - (ADC_voltage - 0.706)/0.001721
-	return (27000<<16 - (int32(thermChan.getVoltage())-706<<16)*581) >> 16
+	// 1/0.001721 ≈ 581
+	return int32(((int64(27000) << 16) - ((int64(thermChan.getVoltage()) - (int64(706) << 16)) * 581)) >> 16)
 }

 // waitForReady spins waiting for the ADC peripheral to become ready.
@@ -101,3 +101,15 @@ func (tmr *timerType) lightSleep(us uint64) {
 	// Disable interrupt
 	intr.Disable()
 }
+
+// setDbgPause sets whether this timer is paused when a debugger is connected.
+func (tmr *timerType) setDbgPause(enable bool) {
+	const bitPos = 1
+	const bitMask = 0b11
+	val := uint32(0b00)
+	if enable {
+		// Disable timer when debugger is connected to either core.
+		val = 0b11
+	}
+	tmr.dbgPause.ReplaceBits(val, bitMask, bitPos)
+}
@@ -104,7 +104,9 @@ func (uart *UART) SetBaudRate(br uint32) {
 func (uart *UART) writeByte(c byte) error {
 	// wait until buffer is not full
 	for uart.Bus.UARTFR.HasBits(rp.UART0_UARTFR_TXFF) {
-		gosched()
+		if !interrupt.In() {
+			gosched()
+		}
 	}

 	// write data
@@ -114,7 +116,9 @@ func (uart *UART) writeByte(c byte) error {

 func (uart *UART) flush() {
 	for uart.Bus.UARTFR.HasBits(rp.UART0_UARTFR_BUSY) {
-		gosched()
+		if !interrupt.In() {
+			gosched()
+		}
 	}
 }

@@ -16,6 +16,8 @@ import (
 )

 // This symbol name is known by the compiler, see monitor.go.
+//
+//go:linkname rttSerialInstance _SEGGER_RTT
 var rttSerialInstance rttSerial

 var Serial = &rttSerialInstance
@@ -12,7 +12,6 @@ package os
 import (
 	"io"
 	"syscall"
-	_ "unsafe"
 )

 const DevNull = "/dev/null"
@@ -127,6 +127,11 @@ type Method struct {
 	Index int   // index for Type.Method
 }

+// IsExported reports whether the method is exported.
+func (m Method) IsExported() bool {
+	return m.PkgPath == ""
+}
+
 // The following Type type has been copied almost entirely from
 // https://github.com/golang/go/blob/go1.15/src/reflect/type.go#L27-L212.
 // Some methods have been commented out as they haven't yet been implemented.
@@ -81,8 +81,8 @@ func (it *MapIter) Next() bool {
 	return ((*reflectlite.MapIter)(it)).Next()
 }

-func (iter *MapIter) Reset(v Value) {
-	(*reflectlite.MapIter)(iter).Reset(v.Value)
+func (it *MapIter) Reset(v Value) {
+	(*reflectlite.MapIter)(it).Reset(v.Value)
 }

 func (v Value) Set(x Value) {
@@ -0,0 +1,11 @@
+package runtime
+
+import _ "unsafe"
+
+// TODO: Use hardware when available
+//
+//go:linkname vgetrandom
+func vgetrandom(p []byte, flags uint32) (ret int, supported bool) { return 0, false }
+
+//go:linkname fatal crypto/internal/sysrand.fatal
+func fatal(msg string) { runtimePanic(msg) }
@@ -106,6 +106,33 @@ func UnlockOSThread() {
 // point of the call.
 func KeepAlive(x interface{})

+// AddCleanup is a dummy cleanup implementation. It doesn't do any cleaning up.
+//
+// We base this on the following loophole in the official runtime.AddCleanup
+// documentation:
+//
+// > The cleanup(arg) call is not always guaranteed to run; in particular it is
+// > not guaranteed to run before program exit.
+//
+// So it's technically correct (the best kind of correct) to not run any
+// cleanups. But of course, this can lead to resource leaks so cleanups may need
+// to be implemented eventually.
+func AddCleanup[T, S any](ptr *T, cleanup func(S), arg S) Cleanup {
+	return Cleanup{}
+}
+
+type Cleanup struct{}
+
+func (c Cleanup) Stop() {}
+
+//go:linkname registerWeakPointer weak.runtime_registerWeakPointer
+func registerWeakPointer(ptr unsafe.Pointer) unsafe.Pointer {
+	// TODO: unimplemented.
+	// I hope not implementing this won't break anything, like packages that
+	// expect weak pointers to be GC'd before they actually are.
+	return ptr
+}
+
 var godebugUpdate func(string, string)

 //go:linkname godebug_setUpdate internal/godebug.setUpdate
@@ -0,0 +1,380 @@
+//go:build rp2040 || rp2350
+
+package runtime
+
+import (
+	"device/arm"
+	"device/rp"
+	"internal/task"
+	"machine"
+	"machine/usb/cdc"
+	"runtime/interrupt"
+	"runtime/volatile"
+	"unsafe"
+)
+
+const numCPU = 2
+const numSpinlocks = 32
+
+// machineTicks is provided by package machine.
+func machineTicks() uint64
+
+// machineLightSleep is provided by package machine.
+func machineLightSleep(uint64)
+
+// ticks returns the number of ticks (microseconds) elapsed since power up.
+func ticks() timeUnit {
+	t := machineTicks()
+	return timeUnit(t)
+}
+
+func ticksToNanoseconds(ticks timeUnit) int64 {
+	return int64(ticks) * 1000
+}
+
+func nanosecondsToTicks(ns int64) timeUnit {
+	return timeUnit(ns / 1000)
+}
+
+func sleepTicks(d timeUnit) {
+	if hasScheduler {
+		// With scheduler, sleepTicks may return early if an interrupt or
+		// event fires - so scheduler can schedule any go routines now
+		// eligible to run
+		machineLightSleep(uint64(d))
+		return
+	}
+
+	// Busy loop
+	sleepUntil := ticks() + d
+	for ticks() < sleepUntil {
+	}
+}
+
+// Currently sleeping core, or 0xff.
+// Must only be accessed with the scheduler lock held.
+var sleepingCore uint8 = 0xff
+
+// Return whether another core is sleeping.
+// May only be called with the scheduler lock held.
+func hasSleepingCore() bool {
+	return sleepingCore != 0xff
+}
+
+// Almost identical to sleepTicks, except that it will unlock/lock the scheduler
+// while sleeping and is interruptible by interruptSleepTicksMulticore.
+// This may only be called with the scheduler lock held.
+func sleepTicksMulticore(d timeUnit) {
+	sleepingCore = uint8(currentCPU())
+
+	// Note: interruptSleepTicksMulticore will be able to interrupt this, since
+	// it executes the "sev" instruction which would make sleepTicks return
+	// immediately without sleeping. Even if it happens while configuring the
+	// sleep operation.
+
+	schedulerLock.Unlock()
+	sleepTicks(d)
+	schedulerLock.Lock()
+
+	sleepingCore = 0xff
+}
+
+// Interrupt an ongoing call to sleepTicksMulticore on another core.
+func interruptSleepTicksMulticore(wakeup timeUnit) {
+	arm.Asm("sev")
+}
+
+// Number of cores that are currently in schedulerUnlockAndWait.
+// It is possible for both cores to be sleeping, if the program is waiting for
+// an interrupt (or is deadlocked).
+var waitingCore uint8
+
+// Put the scheduler to sleep, since there are no tasks to run.
+// This will unlock the scheduler lock, and must be called with the scheduler
+// lock held.
+func schedulerUnlockAndWait() {
+	waitingCore++
+	schedulerLock.Unlock()
+	arm.Asm("wfe")
+	schedulerLock.Lock()
+	waitingCore--
+}
+
+// Wake another core, if one is sleeping. Must be called with the scheduler lock
+// held.
+func schedulerWake() {
+	if waitingCore != 0 {
+		arm.Asm("sev")
+	}
+}
+
+// Return the current core number: 0 or 1.
+func currentCPU() uint32 {
+	return rp.SIO.CPUID.Get()
+}
+
+// Start the secondary cores for this chip.
+// On the RP2040/RP2350, there is only one other core to start.
+func startSecondaryCores() {
+	// Start the second core of the RP2040/RP2350.
+	// See sections 2.8.2 and 5.3 in the datasheets for RP2040 and RP2350 respectively.
+	seq := 0
+	for {
+		cmd := core1StartSequence[seq]
+		if cmd == 0 {
+			multicore_fifo_drain()
+			arm.Asm("sev")
+		}
+		multicore_fifo_push_blocking(cmd)
+		response := multicore_fifo_pop_blocking()
+		if cmd != response {
+			seq = 0
+			continue
+		}
+		seq = seq + 1
+		if seq >= len(core1StartSequence) {
+			break
+		}
+	}
+
+	// Enable the FIFO interrupt for the GC stop the world phase.
+	// We can only do this after we don't need the FIFO anymore for starting the
+	// second core.
+	intr := interrupt.New(sioIrqFifoProc0, func(intr interrupt.Interrupt) {
+		switch rp.SIO.FIFO_RD.Get() {
+		case 1:
+			gcInterruptHandler(0)
+		}
+	})
+	intr.Enable()
+	intr.SetPriority(0xff)
+}
+
+var core1StartSequence = [...]uint32{
+	0, 0, 1,
+	uint32(uintptr(unsafe.Pointer(&__isr_vector))),
+	uint32(uintptr(unsafe.Pointer(&stack1TopSymbol))),
+	uint32(exportedFuncPtr(runCore1)),
+}
+
+//go:extern __isr_vector
+var __isr_vector [0]uint32
+
+//go:extern _stack1_top
+var stack1TopSymbol [0]uint32
+
+// The function that is started on the second core.
+//
+//export tinygo_runCore1
+func runCore1() {
+	// Clear sticky bit that seems to have been set while starting this core.
+	rp.SIO.FIFO_ST.Set(rp.SIO_FIFO_ST_ROE)
+
+	// Enable the FIFO interrupt, mainly used for the stop-the-world phase of
+	// the GC.
+	// Use the lowest possible priority (highest priority value), so that other
+	// interrupts can still happen while the GC is running.
+	intr := interrupt.New(sioIrqFifoProc1, func(intr interrupt.Interrupt) {
+		switch rp.SIO.FIFO_RD.Get() {
+		case 1:
+			gcInterruptHandler(1)
+		}
+	})
+	intr.Enable()
+	intr.SetPriority(0xff)
+
+	// Now start running the scheduler on this core.
+	schedulerLock.Lock()
+	scheduler(false)
+	schedulerLock.Unlock()
+
+	// The main function returned.
+	exit(0)
+}
+
+// The below multicore_fifo_* functions have been translated from the Raspberry
+// Pi Pico SDK.
+
+func multicore_fifo_rvalid() bool {
+	return rp.SIO.FIFO_ST.Get()&rp.SIO_FIFO_ST_VLD != 0
+}
+
+func multicore_fifo_wready() bool {
+	return rp.SIO.FIFO_ST.Get()&rp.SIO_FIFO_ST_RDY != 0
+}
+
+func multicore_fifo_drain() {
+	for multicore_fifo_rvalid() {
+		rp.SIO.FIFO_RD.Get()
+	}
+}
+
+func multicore_fifo_push_blocking(data uint32) {
+	for !multicore_fifo_wready() {
+	}
+	rp.SIO.FIFO_WR.Set(data)
+	arm.Asm("sev")
+}
+
+func multicore_fifo_pop_blocking() uint32 {
+	for !multicore_fifo_rvalid() {
+		arm.Asm("wfe")
+	}
+
+	return rp.SIO.FIFO_RD.Get()
+}
+
+// Value used to communicate between the GC core and the other (paused) cores.
+var gcSignalWait volatile.Register8
+
+// The GC interrupted this core for the stop-the-world phase.
+// This function handles that, and only returns after the stop-the-world phase
+// ended.
+func gcInterruptHandler(hartID uint32) {
+	// Let the GC know we're ready.
+	gcScanState.Add(1)
+	arm.Asm("sev")
+
+	// Wait until we get a signal to start scanning.
+	for gcSignalWait.Get() == 0 {
+		arm.Asm("wfe")
+	}
+	gcSignalWait.Set(0)
+
+	// Scan the stack(s) of this core.
+	scanCurrentStack()
+	if !task.OnSystemStack() {
+		// Mark system stack.
+		markRoots(task.SystemStack(), coreStackTop(hartID))
+	}
+
+	// Signal we've finished scanning.
+	gcScanState.Store(1)
+	arm.Asm("sev")
+
+	// Wait until we get a signal that the stop-the-world phase has ended.
+	for gcSignalWait.Get() == 0 {
+		arm.Asm("wfe")
+	}
+	gcSignalWait.Set(0)
+
+	// Signal we received the signal and are going to exit the interrupt.
+	gcScanState.Add(1)
+	arm.Asm("sev")
+}
+
+// Pause the given core by sending it an interrupt.
+func gcPauseCore(core uint32) {
+	rp.SIO.FIFO_WR.Set(1)
+}
+
+// Signal the given core that it can resume one step.
+// This is called twice after gcPauseCore: the first time to scan the stack of
+// the core, and the second time to end the stop-the-world phase.
+func gcSignalCore(core uint32) {
+	gcSignalWait.Set(1)
+	arm.Asm("sev")
+}
+
+// Returns the stack top (highest address) of the system stack of the given
+// core.
+func coreStackTop(core uint32) uintptr {
+	switch core {
+	case 0:
+		return uintptr(unsafe.Pointer(&stackTopSymbol))
+	case 1:
+		return uintptr(unsafe.Pointer(&stack1TopSymbol))
+	default:
+		runtimePanic("unexpected core")
+		return 0
+	}
+}
+
+// These spinlocks are needed by the runtime.
+var (
+	printLock     = spinLock{id: 20}
+	schedulerLock = spinLock{id: 21}
+	atomicsLock   = spinLock{id: 22}
+	futexLock     = spinLock{id: 23}
+)
+
+func resetSpinLocks() {
+	for i := uint8(0); i < numSpinlocks; i++ {
+		l := &spinLock{id: i}
+		l.spinlock().Set(0)
+	}
+}
+
+// A hardware spinlock, one of the 32 spinlocks defined in the SIO peripheral.
+type spinLock struct {
+	id uint8
+}
+
+// Return the spinlock register: rp.SIO.SPINLOCKx
+func (l *spinLock) spinlock() *volatile.Register32 {
+	return (*volatile.Register32)(unsafe.Add(unsafe.Pointer(&rp.SIO.SPINLOCK0), l.id*4))
+}
+
+func (l *spinLock) Lock() {
+	// Wait for the lock to be available.
+	spinlock := l.spinlock()
+	for spinlock.Get() == 0 {
+		arm.Asm("wfe")
+	}
+}
+
+func (l *spinLock) Unlock() {
+	l.spinlock().Set(0)
+	arm.Asm("sev")
+}
+
+// Wait until a signal is received, indicating that it can resume from the
+// spinloop.
+func spinLoopWait() {
+	arm.Asm("wfe")
+}
+
+func waitForEvents() {
+	arm.Asm("wfe")
+}
+
+func putchar(c byte) {
+	machine.Serial.WriteByte(c)
+}
+
+func getchar() byte {
+	for machine.Serial.Buffered() == 0 {
+		Gosched()
+	}
+	v, _ := machine.Serial.ReadByte()
+	return v
+}
+
+func buffered() int {
+	return machine.Serial.Buffered()
+}
+
+// machineInit is provided by package machine.
+func machineInit()
+
+func init() {
+	machineInit()
+
+	cdc.EnableUSBCDC()
+	machine.USBDev.Configure(machine.UARTConfig{})
+	machine.InitSerial()
+}
+
+func prerun() {
+	// Reset spinlocks before the full machineInit() so the scheduler doesn't
+	// hang waiting for schedulerLock after a soft reset.
+	resetSpinLocks()
+}
+
+//export Reset_Handler
+func main() {
+	preinit()
+	prerun()
+	run()
+	exit(0)
+}
@@ -3,365 +3,10 @@
 package runtime

 import (
-	"device/arm"
 	"device/rp"
-	"internal/task"
-	"machine"
-	"machine/usb/cdc"
-	"runtime/interrupt"
-	"runtime/volatile"
-	"unsafe"
 )

-const numCPU = 2
-
-// machineTicks is provided by package machine.
-func machineTicks() uint64
-
-// machineLightSleep is provided by package machine.
-func machineLightSleep(uint64)
-
-// ticks returns the number of ticks (microseconds) elapsed since power up.
-func ticks() timeUnit {
-	t := machineTicks()
-	return timeUnit(t)
-}
-
-func ticksToNanoseconds(ticks timeUnit) int64 {
-	return int64(ticks) * 1000
-}
-
-func nanosecondsToTicks(ns int64) timeUnit {
-	return timeUnit(ns / 1000)
-}
-
-func sleepTicks(d timeUnit) {
-	if hasScheduler {
-		// With scheduler, sleepTicks may return early if an interrupt or
-		// event fires - so scheduler can schedule any go routines now
-		// eligible to run
-		machineLightSleep(uint64(d))
-		return
-	}
-
-	// Busy loop
-	sleepUntil := ticks() + d
-	for ticks() < sleepUntil {
-	}
-}
-
-// Currently sleeping core, or 0xff.
-// Must only be accessed with the scheduler lock held.
-var sleepingCore uint8 = 0xff
-
-// Return whether another core is sleeping.
-// May only be called with the scheduler lock held.
-func hasSleepingCore() bool {
-	return sleepingCore != 0xff
-}
-
-// Almost identical to sleepTicks, except that it will unlock/lock the scheduler
-// while sleeping and is interruptible by interruptSleepTicksMulticore.
-// This may only be called with the scheduler lock held.
-func sleepTicksMulticore(d timeUnit) {
-	sleepingCore = uint8(currentCPU())
-
-	// Note: interruptSleepTicksMulticore will be able to interrupt this, since
-	// it executes the "sev" instruction which would make sleepTicks return
-	// immediately without sleeping. Even if it happens while configuring the
-	// sleep operation.
-
-	schedulerLock.Unlock()
-	sleepTicks(d)
-	schedulerLock.Lock()
-
-	sleepingCore = 0xff
-}
-
-// Interrupt an ongoing call to sleepTicksMulticore on another core.
-func interruptSleepTicksMulticore(wakeup timeUnit) {
-	arm.Asm("sev")
-}
-
-// Number of cores that are currently in schedulerUnlockAndWait.
-// It is possible for both cores to be sleeping, if the program is waiting for
-// an interrupt (or is deadlocked).
-var waitingCore uint8
-
-// Put the scheduler to sleep, since there are no tasks to run.
-// This will unlock the scheduler lock, and must be called with the scheduler
-// lock held.
-func schedulerUnlockAndWait() {
-	waitingCore++
-	schedulerLock.Unlock()
-	arm.Asm("wfe")
-	schedulerLock.Lock()
-	waitingCore--
-}
-
-// Wake another core, if one is sleeping. Must be called with the scheduler lock
-// held.
-func schedulerWake() {
-	if waitingCore != 0 {
-		arm.Asm("sev")
-	}
-}
-
-// Return the current core number: 0 or 1.
-func currentCPU() uint32 {
-	return rp.SIO.CPUID.Get()
-}
-
-// Start the secondary cores for this chip.
-// On the RP2040, there is only one other core to start.
-func startSecondaryCores() {
-	// Start the second core of the RP2040.
-	// See section 2.8.2 in the datasheet.
-	seq := 0
-	for {
-		cmd := core1StartSequence[seq]
-		if cmd == 0 {
-			multicore_fifo_drain()
-			arm.Asm("sev")
-		}
-		multicore_fifo_push_blocking(cmd)
-		response := multicore_fifo_pop_blocking()
-		if cmd != response {
-			seq = 0
-			continue
-		}
-		seq = seq + 1
-		if seq >= len(core1StartSequence) {
-			break
-		}
-	}
-
-	// Enable the FIFO interrupt for the GC stop the world phase.
-	// We can only do this after we don't need the FIFO anymore for starting the
-	// second core.
-	intr := interrupt.New(rp.IRQ_SIO_IRQ_PROC0, func(intr interrupt.Interrupt) {
-		switch rp.SIO.FIFO_RD.Get() {
-		case 1:
-			gcInterruptHandler(0)
-		}
-	})
-	intr.Enable()
-	intr.SetPriority(0xff)
-}
-
-var core1StartSequence = [...]uint32{
-	0, 0, 1,
-	uint32(uintptr(unsafe.Pointer(&__isr_vector))),
-	uint32(uintptr(unsafe.Pointer(&stack1TopSymbol))),
-	uint32(exportedFuncPtr(runCore1)),
-}
-
-//go:extern __isr_vector
-var __isr_vector [0]uint32
-
-//go:extern _stack1_top
-var stack1TopSymbol [0]uint32
-
-// The function that is started on the second core.
-//
-//export tinygo_runCore1
-func runCore1() {
-	// Clear sticky bit that seems to have been set while starting this core.
-	rp.SIO.FIFO_ST.Set(rp.SIO_FIFO_ST_ROE)
-
-	// Enable the FIFO interrupt, mainly used for the stop-the-world phase of
-	// the GC.
-	// Use the lowest possible priority (highest priority value), so that other
-	// interrupts can still happen while the GC is running.
-	intr := interrupt.New(rp.IRQ_SIO_IRQ_PROC1, func(intr interrupt.Interrupt) {
-		switch rp.SIO.FIFO_RD.Get() {
-		case 1:
-			gcInterruptHandler(1)
-		}
-	})
-	intr.Enable()
-	intr.SetPriority(0xff)
-
-	// Now start running the scheduler on this core.
-	schedulerLock.Lock()
-	scheduler(false)
-	schedulerLock.Unlock()
-
-	// The main function returned.
-	exit(0)
-}
-
-// The below multicore_fifo_* functions have been translated from the Raspberry
-// Pi Pico SDK.
-
-func multicore_fifo_rvalid() bool {
-	return rp.SIO.FIFO_ST.Get()&rp.SIO_FIFO_ST_VLD != 0
-}
-
-func multicore_fifo_wready() bool {
-	return rp.SIO.FIFO_ST.Get()&rp.SIO_FIFO_ST_RDY != 0
-}
-
-func multicore_fifo_drain() {
-	for multicore_fifo_rvalid() {
-		rp.SIO.FIFO_RD.Get()
-	}
-}
-
-func multicore_fifo_push_blocking(data uint32) {
-	for !multicore_fifo_wready() {
-	}
-	rp.SIO.FIFO_WR.Set(data)
-	arm.Asm("sev")
-}
-
-func multicore_fifo_pop_blocking() uint32 {
-	for !multicore_fifo_rvalid() {
-		arm.Asm("wfe")
-	}
-
-	return rp.SIO.FIFO_RD.Get()
-}
-
-// Value used to communicate between the GC core and the other (paused) cores.
-var gcSignalWait volatile.Register8
-
-// The GC interrupted this core for the stop-the-world phase.
-// This function handles that, and only returns after the stop-the-world phase
-// ended.
-func gcInterruptHandler(hartID uint32) {
-	// Let the GC know we're ready.
-	gcScanState.Add(1)
-	arm.Asm("sev")
-
-	// Wait until we get a signal to start scanning.
-	for gcSignalWait.Get() == 0 {
-		arm.Asm("wfe")
-	}
-	gcSignalWait.Set(0)
-
-	// Scan the stack(s) of this core.
-	scanCurrentStack()
-	if !task.OnSystemStack() {
-		// Mark system stack.
-		markRoots(task.SystemStack(), coreStackTop(hartID))
-	}
-
-	// Signal we've finished scanning.
-	gcScanState.Store(1)
-	arm.Asm("sev")
-
-	// Wait until we get a signal that the stop-the-world phase has ended.
-	for gcSignalWait.Get() == 0 {
-		arm.Asm("wfe")
-	}
-	gcSignalWait.Set(0)
-
-	// Signal we received the signal and are going to exit the interrupt.
-	gcScanState.Add(1)
-	arm.Asm("sev")
-}
-
-// Pause the given core by sending it an interrupt.
-func gcPauseCore(core uint32) {
-	rp.SIO.FIFO_WR.Set(1)
-}
-
-// Signal the given core that it can resume one step.
-// This is called twice after gcPauseCore: the first time to scan the stack of
-// the core, and the second time to end the stop-the-world phase.
-func gcSignalCore(core uint32) {
-	gcSignalWait.Set(1)
-	arm.Asm("sev")
-}
-
-// Returns the stack top (highest address) of the system stack of the given
-// core.
-func coreStackTop(core uint32) uintptr {
-	switch core {
-	case 0:
-		return uintptr(unsafe.Pointer(&stackTopSymbol))
-	case 1:
-		return uintptr(unsafe.Pointer(&stack1TopSymbol))
-	default:
-		runtimePanic("unexpected core")
-		return 0
-	}
-}
-
-// These spinlocks are needed by the runtime.
-var (
-	printLock     = spinLock{id: 0}
-	schedulerLock = spinLock{id: 1}
-	atomicsLock   = spinLock{id: 2}
-	futexLock     = spinLock{id: 3}
+const (
+	sioIrqFifoProc0 = rp.IRQ_SIO_IRQ_PROC0
+	sioIrqFifoProc1 = rp.IRQ_SIO_IRQ_PROC1
 )
-
-// A hardware spinlock, one of the 32 spinlocks defined in the SIO peripheral.
-type spinLock struct {
-	id uint8
-}
-
-// Return the spinlock register: rp.SIO.SPINLOCKx
-func (l *spinLock) spinlock() *volatile.Register32 {
-	return (*volatile.Register32)(unsafe.Add(unsafe.Pointer(&rp.SIO.SPINLOCK0), l.id*4))
-}
-
-func (l *spinLock) Lock() {
-	// Wait for the lock to be available.
-	spinlock := l.spinlock()
-	for spinlock.Get() == 0 {
-		// TODO: use wfe and send an event when unlocking so the CPU can go to
-		// sleep while waiting for the lock.
-		// Unfortunately when doing that, time.Sleep() seems to hang somewhere.
-		// This needs some debugging to figure out.
-	}
-}
-
-func (l *spinLock) Unlock() {
-	l.spinlock().Set(0)
-}
-
-// Wait until a signal is received, indicating that it can resume from the
-// spinloop.
-func spinLoopWait() {
-	arm.Asm("wfe")
-}
-
-func waitForEvents() {
-	arm.Asm("wfe")
-}
-
-func putchar(c byte) {
-	machine.Serial.WriteByte(c)
-}
-
-func getchar() byte {
-	for machine.Serial.Buffered() == 0 {
-		Gosched()
-	}
-	v, _ := machine.Serial.ReadByte()
-	return v
-}
-
-func buffered() int {
-	return machine.Serial.Buffered()
-}
-
-// machineInit is provided by package machine.
-func machineInit()
-
-func init() {
-	machineInit()
-
-	cdc.EnableUSBCDC()
-	machine.USBDev.Configure(machine.UARTConfig{})
-	machine.InitSerial()
-}
-
-//export Reset_Handler
-func main() {
-	preinit()
-	run()
-	exit(0)
-}
@@ -3,84 +3,14 @@
 package runtime

 import (
-	"device/arm"
-	"machine"
-	"machine/usb/cdc"
+	"device/rp"
 )

-// machineTicks is provided by package machine.
-func machineTicks() uint64
-
-// machineLightSleep is provided by package machine.
-func machineLightSleep(uint64)
-
-// ticks returns the number of ticks (microseconds) elapsed since power up.
-func ticks() timeUnit {
-	t := machineTicks()
-	return timeUnit(t)
-}
-
-func ticksToNanoseconds(ticks timeUnit) int64 {
-	return int64(ticks) * 1000
-}
-
-func nanosecondsToTicks(ns int64) timeUnit {
-	return timeUnit(ns / 1000)
-}
-
-func sleepTicks(d timeUnit) {
-	if d <= 0 {
-		return
-	}
-
-	if hasScheduler {
-		// With scheduler, sleepTicks may return early if an interrupt or
-		// event fires - so scheduler can schedule any go routines now
-		// eligible to run
-		machineLightSleep(uint64(d))
-		return
-	}
-
-	// Busy loop
-	sleepUntil := ticks() + d
-	for ticks() < sleepUntil {
-	}
-}
-
-func waitForEvents() {
-	arm.Asm("wfe")
-}
-
-func putchar(c byte) {
-	machine.Serial.WriteByte(c)
-}
-
-func getchar() byte {
-	for machine.Serial.Buffered() == 0 {
-		Gosched()
-	}
-	v, _ := machine.Serial.ReadByte()
-	return v
-}
-
-func buffered() int {
-	return machine.Serial.Buffered()
-}
-
-// machineInit is provided by package machine.
-func machineInit()
-
-func init() {
-	machineInit()
-
-	cdc.EnableUSBCDC()
-	machine.USBDev.Configure(machine.UARTConfig{})
-	machine.InitSerial()
-}
-
-//export Reset_Handler
-func main() {
-	preinit()
-	run()
-	exit(0)
-}
+const (
+	// On RP2040 each core has a different IRQ number: SIO_IRQ_PROC0 and SIO_IRQ_PROC1.
+	// On RP2350 both cores share the same irq number (SIO_IRQ_PROC) just with a
+	// different SIO interrupt output routed to that IRQ input on each core.
+	// https://www.raspberrypi.com/documentation/pico-sdk/high_level.html#group_pico_multicore_1ga1413ebfa65114c6f408f4675897ac5ee
+	sioIrqFifoProc0 = rp.IRQ_SIO_IRQ_FIFO
+	sioIrqFifoProc1 = rp.IRQ_SIO_IRQ_FIFO
+)
@@ -77,7 +77,6 @@ func addSleepTask(t *task.Task, duration timeUnit) {
 			panic("runtime: addSleepTask: expected next task to be nil")
 		}
 	}
-	t.Data = uint64(duration)
 	now := ticks()
 	if sleepQueue == nil {
 		scheduleLog("  -> sleep new queue")
@@ -85,6 +84,7 @@ func addSleepTask(t *task.Task, duration timeUnit) {
 		// set new base time
 		sleepQueueBaseTime = now
 	}
+	t.Data = uint64(duration + (now - sleepQueueBaseTime))

 	// Add to sleep queue.
 	q := &sleepQueue
@@ -46,3 +46,9 @@ func timerCallback(tn *timerNode, delta int64) {
 		addTimer(tn)
 	}
 }
+
+//go:linkname time_runtimeIsBubbled time.runtimeIsBubbled
+func time_runtimeIsBubbled() bool {
+	// We don't currently support bubbles.
+	return false
+}
@@ -70,3 +70,15 @@ func (m *Map) Range(f func(key, value interface{}) bool) {
 		}
 	}
 }
+
+// Swap replaces the value for the given key, and returns the old value if any.
+func (m *Map) Swap(key, value any) (previous any, loaded bool) {
+	m.lock.Lock()
+	defer m.lock.Unlock()
+	if m.m == nil {
+		m.m = make(map[interface{}]interface{})
+	}
+	previous, loaded = m.m[key]
+	m.m[key] = value
+	return
+}
@@ -17,3 +17,22 @@ func TestMapLoadAndDelete(t *testing.T) {
 		t.Errorf("LoadAndDelete returned %v, %v, want nil, false", v, ok)
 	}
 }
+
+func TestMapSwap(t *testing.T) {
+	var sm sync.Map
+	sm.Store("present", "value")
+
+	if v, ok := sm.Swap("present", "value2"); !ok || v != "value" {
+		t.Errorf("Swap returned %v, %v, want value, true", v, ok)
+	}
+	if v, ok := sm.Load("present"); !ok || v != "value2" {
+		t.Errorf("Load after Swap returned %v, %v, want value2, true", v, ok)
+	}
+
+	if v, ok := sm.Swap("new", "foo"); ok || v != nil {
+		t.Errorf("Swap returned %v, %v, want nil, false", v, ok)
+	}
+	if v, ok := sm.Load("present"); !ok || v != "value2" {
+		t.Errorf("Load after Swap returned %v, %v, want foo, true", v, ok)
+	}
+}
@@ -31,6 +31,9 @@ type RWMutex struct {

 const rwMutexMaxReaders = 1 << 30

+// Lock locks rw for writing.
+// If the lock is already locked for reading or writing,
+// Lock blocks until the lock is available.
 func (rw *RWMutex) Lock() {
 	// Exclusive lock for writers.
 	rw.writerLock.Lock()
@@ -56,6 +59,12 @@ func (rw *RWMutex) Lock() {
 	rw.writer.Store(0)
 }

+// Unlock unlocks rw for writing. It is a run-time error if rw is
+// not locked for writing on entry to Unlock.
+//
+// As with Mutexes, a locked [RWMutex] is not associated with a particular
+// goroutine. One goroutine may [RWMutex.RLock] ([RWMutex.Lock]) a RWMutex and then
+// arrange for another goroutine to [RWMutex.RUnlock] ([RWMutex.Unlock]) it.
 func (rw *RWMutex) Unlock() {
 	// Signal that new readers can lock this mutex.
 	waiting := rw.readers.Add(rwMutexMaxReaders)
@@ -68,6 +77,31 @@ func (rw *RWMutex) Unlock() {
 	rw.writerLock.Unlock()
 }

+// TryLock tries to lock m and reports whether it succeeded.
+//
+// Note that while correct uses of TryLock do exist, they are rare,
+// and use of TryLock is often a sign of a deeper problem
+// in a particular use of mutexes.
+func (rw *RWMutex) TryLock() bool {
+	// Check for active writers
+	if !rw.writerLock.TryLock() {
+		return false
+	}
+	// Have write lock, now check for active readers
+	n := uint32(rwMutexMaxReaders)
+	if !rw.readers.CompareAndSwap(0, -n) {
+		// Active readers, give up write lock
+		rw.writerLock.Unlock()
+		return false
+	}
+	return true
+}
+
+// RLock locks rw for reading.
+//
+// It should not be used for recursive read locking; a blocked Lock
+// call excludes new readers from acquiring the lock. See the
+// documentation on the [RWMutex] type.
 func (rw *RWMutex) RLock() {
 	// Add us as a reader.
 	newVal := rw.readers.Add(1)
@@ -79,6 +113,10 @@ func (rw *RWMutex) RLock() {
 	}
 }

+// RUnlock undoes a single [RWMutex.RLock] call;
+// it does not affect other simultaneous readers.
+// It is a run-time error if rw is not locked for reading
+// on entry to RUnlock.
 func (rw *RWMutex) RUnlock() {
 	// Remove us as a reader.
 	one := uint32(1)
@@ -98,6 +136,25 @@ func (rw *RWMutex) RUnlock() {
 	}
 }

+// TryRLock tries to lock rw for reading and reports whether it succeeded.
+//
+// Note that while correct uses of TryRLock do exist, they are rare,
+// and use of TryRLock is often a sign of a deeper problem
+// in a particular use of mutexes.
+func (rw *RWMutex) TryRLock() bool {
+	for {
+		c := rw.readers.Load()
+		if c < 0 {
+			// There is a writer waiting or writing.
+			return false
+		}
+		if rw.readers.CompareAndSwap(c, c+1) {
+			// Read lock obtained.
+			return true
+		}
+	}
+}
+
 type Locker interface {
 	Lock()
 	Unlock()
@@ -7,7 +7,13 @@ import (
 	"testing"
 )

-func HammerMutex(m *sync.Mutex, loops int, cdone chan bool) {
+type mutex interface {
+	Lock()
+	Unlock()
+	TryLock() bool
+}
+
+func HammerMutex(m mutex, loops int, cdone chan bool) {
 	for i := 0; i < loops; i++ {
 		if i%3 == 0 {
 			if m.TryLock() {
@@ -240,3 +246,25 @@ func TestRWMutexReadToWrite(t *testing.T) {
 		t.Errorf("write lock acquired while %d readers were active", res)
 	}
 }
+
+func TestRWMutex(t *testing.T) {
+	m := new(sync.RWMutex)
+
+	m.Lock()
+	if m.TryLock() {
+		t.Fatalf("TryLock succeeded with mutex locked")
+	}
+	m.Unlock()
+	if !m.TryLock() {
+		t.Fatalf("TryLock failed with mutex unlocked")
+	}
+	m.Unlock()
+
+	c := make(chan bool)
+	for i := 0; i < 10; i++ {
+		go HammerMutex(m, 1000, c)
+	}
+	for i := 0; i < 10; i++ {
+		<-c
+	}
+}
@@ -159,6 +159,7 @@ func (b *B) ReportAllocs() {

 // runN runs a single benchmark for the specified number of iterations.
 func (b *B) runN(n int) {
+	b.runCleanup() // start fresh in the next iteration
 	b.N = n
 	runtime.GC()
 	b.ResetTimer()
@@ -457,6 +458,7 @@ func (b *B) Run(name string, f func(b *B)) bool {
 		// Only process sub-benchmarks, if any.
 		sub.hasSub = true
 	}
+	defer sub.runCleanup() // make sure all cleanups are run, even when panicking
 	if sub.run1() {
 		sub.run()
 	}
@@ -500,6 +502,10 @@ func (b *B) RunParallel(body func(*PB)) {
 	return
 }

+func (b *B) Loop() bool {
+	panic("unimplemented: testing.B.Loop")
+}
+
 // Benchmark benchmarks a single function. It is useful for creating
 // custom benchmarks that do not use the "go test" command.
 //
@@ -3,6 +3,7 @@
        "rp2040"
    ],
    "serial-port": ["2e8a:0003"],
+    "default-stack-size": 8192,
    "build-tags": ["badger2040_w", "cyw43439"],
    "ldflags": [
        "--defsym=__flash_size=1020K"
@@ -3,6 +3,7 @@
        "rp2040"
    ],
    "serial-port": ["2e8a:0003"],
+    "default-stack-size": 8192,
    "build-tags": ["badger2040"],
    "ldflags": [
        "--defsym=__flash_size=1020K"
@@ -3,6 +3,7 @@
        "rp2040"
    ],
    "serial-port": ["2e8a:1023"],
+    "default-stack-size": 8192,
    "build-tags": ["challenger_rp2040"],
    "ldflags": [
        "--defsym=__flash_size=8M"
@@ -1,6 +1,6 @@
 {
 	"inherits": ["riscv32"],
-	"features": "+32bit,+c,+m,+zmmul,-a,-b,-d,-e,-experimental-smmpm,-experimental-smnpm,-experimental-ssnpm,-experimental-sspm,-experimental-ssqosid,-experimental-supm,-experimental-zacas,-experimental-zalasr,-experimental-zicfilp,-experimental-zicfiss,-f,-h,-relax,-shcounterenw,-shgatpa,-shtvala,-shvsatpa,-shvstvala,-shvstvecd,-smaia,-smcdeleg,-smcsrind,-smepmp,-smstateen,-ssaia,-ssccfg,-ssccptr,-sscofpmf,-sscounterenw,-sscsrind,-ssstateen,-ssstrict,-sstc,-sstvala,-sstvecd,-ssu64xl,-svade,-svadu,-svbare,-svinval,-svnapot,-svpbmt,-v,-xcvalu,-xcvbi,-xcvbitmanip,-xcvelw,-xcvmac,-xcvmem,-xcvsimd,-xesppie,-xsfcease,-xsfvcp,-xsfvfnrclipxfqf,-xsfvfwmaccqqq,-xsfvqmaccdod,-xsfvqmaccqoq,-xsifivecdiscarddlone,-xsifivecflushdlone,-xtheadba,-xtheadbb,-xtheadbs,-xtheadcmo,-xtheadcondmov,-xtheadfmemidx,-xtheadmac,-xtheadmemidx,-xtheadmempair,-xtheadsync,-xtheadvdot,-xventanacondops,-xwchc,-za128rs,-za64rs,-zaamo,-zabha,-zalrsc,-zama16b,-zawrs,-zba,-zbb,-zbc,-zbkb,-zbkc,-zbkx,-zbs,-zca,-zcb,-zcd,-zce,-zcf,-zcmop,-zcmp,-zcmt,-zdinx,-zfa,-zfbfmin,-zfh,-zfhmin,-zfinx,-zhinx,-zhinxmin,-zic64b,-zicbom,-zicbop,-zicboz,-ziccamoa,-ziccif,-zicclsm,-ziccrse,-zicntr,-zicond,-zicsr,-zifencei,-zihintntl,-zihintpause,-zihpm,-zimop,-zk,-zkn,-zknd,-zkne,-zknh,-zkr,-zks,-zksed,-zksh,-zkt,-ztso,-zvbb,-zvbc,-zve32f,-zve32x,-zve64d,-zve64f,-zve64x,-zvfbfmin,-zvfbfwma,-zvfh,-zvfhmin,-zvkb,-zvkg,-zvkn,-zvknc,-zvkned,-zvkng,-zvknha,-zvknhb,-zvks,-zvksc,-zvksed,-zvksg,-zvksh,-zvkt,-zvl1024b,-zvl128b,-zvl16384b,-zvl2048b,-zvl256b,-zvl32768b,-zvl32b,-zvl4096b,-zvl512b,-zvl64b,-zvl65536b,-zvl8192b",
+	"features": "+32bit,+c,+m,+zmmul,-a,-b,-d,-e,-experimental-sdext,-experimental-sdtrig,-experimental-smctr,-experimental-ssctr,-experimental-svukte,-experimental-xqcia,-experimental-xqciac,-experimental-xqcicli,-experimental-xqcicm,-experimental-xqcics,-experimental-xqcicsr,-experimental-xqciint,-experimental-xqcilo,-experimental-xqcilsm,-experimental-xqcisls,-experimental-zalasr,-experimental-zicfilp,-experimental-zicfiss,-experimental-zvbc32e,-experimental-zvkgs,-f,-h,-relax,-sha,-shcounterenw,-shgatpa,-shtvala,-shvsatpa,-shvstvala,-shvstvecd,-smaia,-smcdeleg,-smcsrind,-smdbltrp,-smepmp,-smmpm,-smnpm,-smrnmi,-smstateen,-ssaia,-ssccfg,-ssccptr,-sscofpmf,-sscounterenw,-sscsrind,-ssdbltrp,-ssnpm,-sspm,-ssqosid,-ssstateen,-ssstrict,-sstc,-sstvala,-sstvecd,-ssu64xl,-supm,-svade,-svadu,-svbare,-svinval,-svnapot,-svpbmt,-svvptc,-v,-xcvalu,-xcvbi,-xcvbitmanip,-xcvelw,-xcvmac,-xcvmem,-xcvsimd,-xesppie,-xmipscmove,-xmipslsp,-xsfcease,-xsfvcp,-xsfvfnrclipxfqf,-xsfvfwmaccqqq,-xsfvqmaccdod,-xsfvqmaccqoq,-xsifivecdiscarddlone,-xsifivecflushdlone,-xtheadba,-xtheadbb,-xtheadbs,-xtheadcmo,-xtheadcondmov,-xtheadfmemidx,-xtheadmac,-xtheadmemidx,-xtheadmempair,-xtheadsync,-xtheadvdot,-xventanacondops,-xwchc,-za128rs,-za64rs,-zaamo,-zabha,-zacas,-zalrsc,-zama16b,-zawrs,-zba,-zbb,-zbc,-zbkb,-zbkc,-zbkx,-zbs,-zca,-zcb,-zcd,-zce,-zcf,-zcmop,-zcmp,-zcmt,-zdinx,-zfa,-zfbfmin,-zfh,-zfhmin,-zfinx,-zhinx,-zhinxmin,-zic64b,-zicbom,-zicbop,-zicboz,-ziccamoa,-ziccif,-zicclsm,-ziccrse,-zicntr,-zicond,-zicsr,-zifencei,-zihintntl,-zihintpause,-zihpm,-zimop,-zk,-zkn,-zknd,-zkne,-zknh,-zkr,-zks,-zksed,-zksh,-zkt,-ztso,-zvbb,-zvbc,-zve32f,-zve32x,-zve64d,-zve64f,-zve64x,-zvfbfmin,-zvfbfwma,-zvfh,-zvfhmin,-zvkb,-zvkg,-zvkn,-zvknc,-zvkned,-zvkng,-zvknha,-zvknhb,-zvks,-zvksc,-zvksed,-zvksg,-zvksh,-zvkt,-zvl1024b,-zvl128b,-zvl16384b,-zvl2048b,-zvl256b,-zvl32768b,-zvl32b,-zvl4096b,-zvl512b,-zvl64b,-zvl65536b,-zvl8192b",
 	"build-tags": ["esp32c3", "esp"],
 	"serial": "usb",
 	"rtlib": "compiler-rt",
@@ -1,6 +1,6 @@
 {
 	"inherits": ["riscv32"],
 	"cpu": "sifive-e31",
-	"features": "+32bit,+a,+c,+m,+zmmul,-b,-d,-e,-experimental-smmpm,-experimental-smnpm,-experimental-ssnpm,-experimental-sspm,-experimental-ssqosid,-experimental-supm,-experimental-zacas,-experimental-zalasr,-experimental-zicfilp,-experimental-zicfiss,-f,-h,-relax,-shcounterenw,-shgatpa,-shtvala,-shvsatpa,-shvstvala,-shvstvecd,-smaia,-smcdeleg,-smcsrind,-smepmp,-smstateen,-ssaia,-ssccfg,-ssccptr,-sscofpmf,-sscounterenw,-sscsrind,-ssstateen,-ssstrict,-sstc,-sstvala,-sstvecd,-ssu64xl,-svade,-svadu,-svbare,-svinval,-svnapot,-svpbmt,-v,-xcvalu,-xcvbi,-xcvbitmanip,-xcvelw,-xcvmac,-xcvmem,-xcvsimd,-xesppie,-xsfcease,-xsfvcp,-xsfvfnrclipxfqf,-xsfvfwmaccqqq,-xsfvqmaccdod,-xsfvqmaccqoq,-xsifivecdiscarddlone,-xsifivecflushdlone,-xtheadba,-xtheadbb,-xtheadbs,-xtheadcmo,-xtheadcondmov,-xtheadfmemidx,-xtheadmac,-xtheadmemidx,-xtheadmempair,-xtheadsync,-xtheadvdot,-xventanacondops,-xwchc,-za128rs,-za64rs,-zaamo,-zabha,-zalrsc,-zama16b,-zawrs,-zba,-zbb,-zbc,-zbkb,-zbkc,-zbkx,-zbs,-zca,-zcb,-zcd,-zce,-zcf,-zcmop,-zcmp,-zcmt,-zdinx,-zfa,-zfbfmin,-zfh,-zfhmin,-zfinx,-zhinx,-zhinxmin,-zic64b,-zicbom,-zicbop,-zicboz,-ziccamoa,-ziccif,-zicclsm,-ziccrse,-zicntr,-zicond,-zicsr,-zifencei,-zihintntl,-zihintpause,-zihpm,-zimop,-zk,-zkn,-zknd,-zkne,-zknh,-zkr,-zks,-zksed,-zksh,-zkt,-ztso,-zvbb,-zvbc,-zve32f,-zve32x,-zve64d,-zve64f,-zve64x,-zvfbfmin,-zvfbfwma,-zvfh,-zvfhmin,-zvkb,-zvkg,-zvkn,-zvknc,-zvkned,-zvkng,-zvknha,-zvknhb,-zvks,-zvksc,-zvksed,-zvksg,-zvksh,-zvkt,-zvl1024b,-zvl128b,-zvl16384b,-zvl2048b,-zvl256b,-zvl32768b,-zvl32b,-zvl4096b,-zvl512b,-zvl64b,-zvl65536b,-zvl8192b",
+	"features": "+32bit,+a,+c,+m,+zaamo,+zalrsc,+zmmul,-b,-d,-e,-experimental-sdext,-experimental-sdtrig,-experimental-smctr,-experimental-ssctr,-experimental-svukte,-experimental-xqcia,-experimental-xqciac,-experimental-xqcicli,-experimental-xqcicm,-experimental-xqcics,-experimental-xqcicsr,-experimental-xqciint,-experimental-xqcilo,-experimental-xqcilsm,-experimental-xqcisls,-experimental-zalasr,-experimental-zicfilp,-experimental-zicfiss,-experimental-zvbc32e,-experimental-zvkgs,-f,-h,-relax,-sha,-shcounterenw,-shgatpa,-shtvala,-shvsatpa,-shvstvala,-shvstvecd,-smaia,-smcdeleg,-smcsrind,-smdbltrp,-smepmp,-smmpm,-smnpm,-smrnmi,-smstateen,-ssaia,-ssccfg,-ssccptr,-sscofpmf,-sscounterenw,-sscsrind,-ssdbltrp,-ssnpm,-sspm,-ssqosid,-ssstateen,-ssstrict,-sstc,-sstvala,-sstvecd,-ssu64xl,-supm,-svade,-svadu,-svbare,-svinval,-svnapot,-svpbmt,-svvptc,-v,-xcvalu,-xcvbi,-xcvbitmanip,-xcvelw,-xcvmac,-xcvmem,-xcvsimd,-xesppie,-xmipscmove,-xmipslsp,-xsfcease,-xsfvcp,-xsfvfnrclipxfqf,-xsfvfwmaccqqq,-xsfvqmaccdod,-xsfvqmaccqoq,-xsifivecdiscarddlone,-xsifivecflushdlone,-xtheadba,-xtheadbb,-xtheadbs,-xtheadcmo,-xtheadcondmov,-xtheadfmemidx,-xtheadmac,-xtheadmemidx,-xtheadmempair,-xtheadsync,-xtheadvdot,-xventanacondops,-xwchc,-za128rs,-za64rs,-zabha,-zacas,-zama16b,-zawrs,-zba,-zbb,-zbc,-zbkb,-zbkc,-zbkx,-zbs,-zca,-zcb,-zcd,-zce,-zcf,-zcmop,-zcmp,-zcmt,-zdinx,-zfa,-zfbfmin,-zfh,-zfhmin,-zfinx,-zhinx,-zhinxmin,-zic64b,-zicbom,-zicbop,-zicboz,-ziccamoa,-ziccif,-zicclsm,-ziccrse,-zicntr,-zicond,-zicsr,-zifencei,-zihintntl,-zihintpause,-zihpm,-zimop,-zk,-zkn,-zknd,-zkne,-zknh,-zkr,-zks,-zksed,-zksh,-zkt,-ztso,-zvbb,-zvbc,-zve32f,-zve32x,-zve64d,-zve64f,-zve64x,-zvfbfmin,-zvfbfwma,-zvfh,-zvfhmin,-zvkb,-zvkg,-zvkn,-zvknc,-zvkned,-zvkng,-zvknha,-zvknhb,-zvks,-zvksc,-zvksed,-zvksg,-zvksh,-zvkt,-zvl1024b,-zvl128b,-zvl16384b,-zvl2048b,-zvl256b,-zvl32768b,-zvl32b,-zvl4096b,-zvl512b,-zvl64b,-zvl65536b,-zvl8192b",
 	"build-tags": ["fe310", "sifive"]
 }
@@ -3,6 +3,7 @@
        "rp2040"
    ],
    "serial-port": ["239a:80f1"],
+    "default-stack-size": 8192,
    "build-tags": ["feather_rp2040"],
    "ldflags": [
        "--defsym=__flash_size=8192K"
@@ -0,0 +1,10 @@
+{
+	"inherits": ["attiny85"],
+	"build-tags": ["gopher_arcade"],
+	"ldflags": [
+		"--defsym=_bootloader_size=2180",
+		"--defsym=_stack_size=128"
+	],
+	"flash-command": "avrdude -c usbasp -p t85 -B 10 -U flash:w:{hex}:i",
+	"emulator": "simavr -m attiny85 -f 16000000 {}"
+}
@@ -3,6 +3,7 @@
        "rp2040"
    ],
    "serial-port": ["2e8a:0003"],
+    "default-stack-size": 8192,
    "build-tags": ["gopher_badge"],
    "ldflags": [
        "--defsym=__flash_size=8M"
@@ -1,6 +1,6 @@
 {
 	"inherits": ["riscv64"],
-	"features": "+64bit,+a,+c,+d,+f,+m,+zicsr,+zifencei,+zmmul,-b,-e,-experimental-smmpm,-experimental-smnpm,-experimental-ssnpm,-experimental-sspm,-experimental-ssqosid,-experimental-supm,-experimental-zacas,-experimental-zalasr,-experimental-zicfilp,-experimental-zicfiss,-h,-relax,-shcounterenw,-shgatpa,-shtvala,-shvsatpa,-shvstvala,-shvstvecd,-smaia,-smcdeleg,-smcsrind,-smepmp,-smstateen,-ssaia,-ssccfg,-ssccptr,-sscofpmf,-sscounterenw,-sscsrind,-ssstateen,-ssstrict,-sstc,-sstvala,-sstvecd,-ssu64xl,-svade,-svadu,-svbare,-svinval,-svnapot,-svpbmt,-v,-xcvalu,-xcvbi,-xcvbitmanip,-xcvelw,-xcvmac,-xcvmem,-xcvsimd,-xesppie,-xsfcease,-xsfvcp,-xsfvfnrclipxfqf,-xsfvfwmaccqqq,-xsfvqmaccdod,-xsfvqmaccqoq,-xsifivecdiscarddlone,-xsifivecflushdlone,-xtheadba,-xtheadbb,-xtheadbs,-xtheadcmo,-xtheadcondmov,-xtheadfmemidx,-xtheadmac,-xtheadmemidx,-xtheadmempair,-xtheadsync,-xtheadvdot,-xventanacondops,-xwchc,-za128rs,-za64rs,-zaamo,-zabha,-zalrsc,-zama16b,-zawrs,-zba,-zbb,-zbc,-zbkb,-zbkc,-zbkx,-zbs,-zca,-zcb,-zcd,-zce,-zcf,-zcmop,-zcmp,-zcmt,-zdinx,-zfa,-zfbfmin,-zfh,-zfhmin,-zfinx,-zhinx,-zhinxmin,-zic64b,-zicbom,-zicbop,-zicboz,-ziccamoa,-ziccif,-zicclsm,-ziccrse,-zicntr,-zicond,-zihintntl,-zihintpause,-zihpm,-zimop,-zk,-zkn,-zknd,-zkne,-zknh,-zkr,-zks,-zksed,-zksh,-zkt,-ztso,-zvbb,-zvbc,-zve32f,-zve32x,-zve64d,-zve64f,-zve64x,-zvfbfmin,-zvfbfwma,-zvfh,-zvfhmin,-zvkb,-zvkg,-zvkn,-zvknc,-zvkned,-zvkng,-zvknha,-zvknhb,-zvks,-zvksc,-zvksed,-zvksg,-zvksh,-zvkt,-zvl1024b,-zvl128b,-zvl16384b,-zvl2048b,-zvl256b,-zvl32768b,-zvl32b,-zvl4096b,-zvl512b,-zvl64b,-zvl65536b,-zvl8192b",
+	"features": "+64bit,+a,+c,+d,+f,+m,+zaamo,+zalrsc,+zicsr,+zifencei,+zmmul,-b,-e,-experimental-sdext,-experimental-sdtrig,-experimental-smctr,-experimental-ssctr,-experimental-svukte,-experimental-xqcia,-experimental-xqciac,-experimental-xqcicli,-experimental-xqcicm,-experimental-xqcics,-experimental-xqcicsr,-experimental-xqciint,-experimental-xqcilo,-experimental-xqcilsm,-experimental-xqcisls,-experimental-zalasr,-experimental-zicfilp,-experimental-zicfiss,-experimental-zvbc32e,-experimental-zvkgs,-h,-relax,-sha,-shcounterenw,-shgatpa,-shtvala,-shvsatpa,-shvstvala,-shvstvecd,-smaia,-smcdeleg,-smcsrind,-smdbltrp,-smepmp,-smmpm,-smnpm,-smrnmi,-smstateen,-ssaia,-ssccfg,-ssccptr,-sscofpmf,-sscounterenw,-sscsrind,-ssdbltrp,-ssnpm,-sspm,-ssqosid,-ssstateen,-ssstrict,-sstc,-sstvala,-sstvecd,-ssu64xl,-supm,-svade,-svadu,-svbare,-svinval,-svnapot,-svpbmt,-svvptc,-v,-xcvalu,-xcvbi,-xcvbitmanip,-xcvelw,-xcvmac,-xcvmem,-xcvsimd,-xesppie,-xmipscmove,-xmipslsp,-xsfcease,-xsfvcp,-xsfvfnrclipxfqf,-xsfvfwmaccqqq,-xsfvqmaccdod,-xsfvqmaccqoq,-xsifivecdiscarddlone,-xsifivecflushdlone,-xtheadba,-xtheadbb,-xtheadbs,-xtheadcmo,-xtheadcondmov,-xtheadfmemidx,-xtheadmac,-xtheadmemidx,-xtheadmempair,-xtheadsync,-xtheadvdot,-xventanacondops,-xwchc,-za128rs,-za64rs,-zabha,-zacas,-zama16b,-zawrs,-zba,-zbb,-zbc,-zbkb,-zbkc,-zbkx,-zbs,-zca,-zcb,-zcd,-zce,-zcf,-zcmop,-zcmp,-zcmt,-zdinx,-zfa,-zfbfmin,-zfh,-zfhmin,-zfinx,-zhinx,-zhinxmin,-zic64b,-zicbom,-zicbop,-zicboz,-ziccamoa,-ziccif,-zicclsm,-ziccrse,-zicntr,-zicond,-zihintntl,-zihintpause,-zihpm,-zimop,-zk,-zkn,-zknd,-zkne,-zknh,-zkr,-zks,-zksed,-zksh,-zkt,-ztso,-zvbb,-zvbc,-zve32f,-zve32x,-zve64d,-zve64f,-zve64x,-zvfbfmin,-zvfbfwma,-zvfh,-zvfhmin,-zvkb,-zvkg,-zvkn,-zvknc,-zvkned,-zvkng,-zvknha,-zvknhb,-zvks,-zvksc,-zvksed,-zvksg,-zvksh,-zvkt,-zvl1024b,-zvl128b,-zvl16384b,-zvl2048b,-zvl256b,-zvl32768b,-zvl32b,-zvl4096b,-zvl512b,-zvl64b,-zvl65536b,-zvl8192b",
 	"build-tags": ["k210", "kendryte"],
 	"code-model": "medium"
 }
@@ -3,6 +3,7 @@
        "rp2040"
    ],
    "build-tags": ["macropad_rp2040"],
+    "default-stack-size": 8192,
    "serial-port": ["239a:8107"],
    "ldflags": [
        "--defsym=__flash_size=8M"
@@ -0,0 +1,11 @@
+{
+    "inherits": [
+        "rp2350b"
+    ],
+    "build-tags": ["metro_rp2350"],
+    "serial-port": ["239a:814e"],
+    "default-stack-size": 8192,
+    "ldflags": [
+        "--defsym=__flash_size=16M"
+    ]
+}
@@ -3,6 +3,7 @@
        "rp2040"
    ],
    "serial-port": ["2341:005e"],
+    "default-stack-size": 8192,
    "build-tags": ["nano_rp2040", "ninafw", "ninafw_machine_init"],
    "ldflags": [
        "--defsym=__flash_size=16M"
@@ -3,6 +3,7 @@
        "rp2040"
    ],
    "serial-port": ["239a:80f7"],
+    "default-stack-size": 8192,
    "build-tags": ["qtpy_rp2040"],
    "ldflags": [
        "--defsym=__flash_size=8192K"
@@ -2,13 +2,13 @@
 	"inherits": [
 		"riscv32"
 	],
-	"features": "+32bit,+a,+c,+m,+zihintpause,+zmmul,-b,-d,-e,-experimental-smmpm,-experimental-smnpm,-experimental-ssnpm,-experimental-sspm,-experimental-ssqosid,-experimental-supm,-experimental-zacas,-experimental-zalasr,-experimental-zicfilp,-experimental-zicfiss,-f,-h,-relax,-shcounterenw,-shgatpa,-shtvala,-shvsatpa,-shvstvala,-shvstvecd,-smaia,-smcdeleg,-smcsrind,-smepmp,-smstateen,-ssaia,-ssccfg,-ssccptr,-sscofpmf,-sscounterenw,-sscsrind,-ssstateen,-ssstrict,-sstc,-sstvala,-sstvecd,-ssu64xl,-svade,-svadu,-svbare,-svinval,-svnapot,-svpbmt,-v,-xcvalu,-xcvbi,-xcvbitmanip,-xcvelw,-xcvmac,-xcvmem,-xcvsimd,-xesppie,-xsfcease,-xsfvcp,-xsfvfnrclipxfqf,-xsfvfwmaccqqq,-xsfvqmaccdod,-xsfvqmaccqoq,-xsifivecdiscarddlone,-xsifivecflushdlone,-xtheadba,-xtheadbb,-xtheadbs,-xtheadcmo,-xtheadcondmov,-xtheadfmemidx,-xtheadmac,-xtheadmemidx,-xtheadmempair,-xtheadsync,-xtheadvdot,-xventanacondops,-xwchc,-za128rs,-za64rs,-zaamo,-zabha,-zalrsc,-zama16b,-zawrs,-zba,-zbb,-zbc,-zbkb,-zbkc,-zbkx,-zbs,-zca,-zcb,-zcd,-zce,-zcf,-zcmop,-zcmp,-zcmt,-zdinx,-zfa,-zfbfmin,-zfh,-zfhmin,-zfinx,-zhinx,-zhinxmin,-zic64b,-zicbom,-zicbop,-zicboz,-ziccamoa,-ziccif,-zicclsm,-ziccrse,-zicntr,-zicond,-zicsr,-zifencei,-zihintntl,-zihpm,-zimop,-zk,-zkn,-zknd,-zkne,-zknh,-zkr,-zks,-zksed,-zksh,-zkt,-ztso,-zvbb,-zvbc,-zve32f,-zve32x,-zve64d,-zve64f,-zve64x,-zvfbfmin,-zvfbfwma,-zvfh,-zvfhmin,-zvkb,-zvkg,-zvkn,-zvknc,-zvkned,-zvkng,-zvknha,-zvknhb,-zvks,-zvksc,-zvksed,-zvksg,-zvksh,-zvkt,-zvl1024b,-zvl128b,-zvl16384b,-zvl2048b,-zvl256b,-zvl32768b,-zvl32b,-zvl4096b,-zvl512b,-zvl64b,-zvl65536b,-zvl8192b",
+	"features": "+32bit,+a,+c,+m,+zaamo,+zalrsc,+zihintpause,+zmmul,-b,-d,-e,-experimental-sdext,-experimental-sdtrig,-experimental-smctr,-experimental-ssctr,-experimental-svukte,-experimental-xqcia,-experimental-xqciac,-experimental-xqcicli,-experimental-xqcicm,-experimental-xqcics,-experimental-xqcicsr,-experimental-xqciint,-experimental-xqcilo,-experimental-xqcilsm,-experimental-xqcisls,-experimental-zalasr,-experimental-zicfilp,-experimental-zicfiss,-experimental-zvbc32e,-experimental-zvkgs,-f,-h,-relax,-sha,-shcounterenw,-shgatpa,-shtvala,-shvsatpa,-shvstvala,-shvstvecd,-smaia,-smcdeleg,-smcsrind,-smdbltrp,-smepmp,-smmpm,-smnpm,-smrnmi,-smstateen,-ssaia,-ssccfg,-ssccptr,-sscofpmf,-sscounterenw,-sscsrind,-ssdbltrp,-ssnpm,-sspm,-ssqosid,-ssstateen,-ssstrict,-sstc,-sstvala,-sstvecd,-ssu64xl,-supm,-svade,-svadu,-svbare,-svinval,-svnapot,-svpbmt,-svvptc,-v,-xcvalu,-xcvbi,-xcvbitmanip,-xcvelw,-xcvmac,-xcvmem,-xcvsimd,-xesppie,-xmipscmove,-xmipslsp,-xsfcease,-xsfvcp,-xsfvfnrclipxfqf,-xsfvfwmaccqqq,-xsfvqmaccdod,-xsfvqmaccqoq,-xsifivecdiscarddlone,-xsifivecflushdlone,-xtheadba,-xtheadbb,-xtheadbs,-xtheadcmo,-xtheadcondmov,-xtheadfmemidx,-xtheadmac,-xtheadmemidx,-xtheadmempair,-xtheadsync,-xtheadvdot,-xventanacondops,-xwchc,-za128rs,-za64rs,-zabha,-zacas,-zama16b,-zawrs,-zba,-zbb,-zbc,-zbkb,-zbkc,-zbkx,-zbs,-zca,-zcb,-zcd,-zce,-zcf,-zcmop,-zcmp,-zcmt,-zdinx,-zfa,-zfbfmin,-zfh,-zfhmin,-zfinx,-zhinx,-zhinxmin,-zic64b,-zicbom,-zicbop,-zicboz,-ziccamoa,-ziccif,-zicclsm,-ziccrse,-zicntr,-zicond,-zicsr,-zifencei,-zihintntl,-zihpm,-zimop,-zk,-zkn,-zknd,-zkne,-zknh,-zkr,-zks,-zksed,-zksh,-zkt,-ztso,-zvbb,-zvbc,-zve32f,-zve32x,-zve64d,-zve64f,-zve64x,-zvfbfmin,-zvfbfwma,-zvfh,-zvfhmin,-zvkb,-zvkg,-zvkn,-zvknc,-zvkned,-zvkng,-zvknha,-zvknhb,-zvks,-zvksc,-zvksed,-zvksg,-zvksh,-zvkt,-zvl1024b,-zvl128b,-zvl16384b,-zvl2048b,-zvl256b,-zvl32768b,-zvl32b,-zvl4096b,-zvl512b,-zvl64b,-zvl65536b,-zvl8192b",
 	"build-tags": [
 		"virt",
 		"qemu"
 	],
 	"scheduler": "cores",
-	"default-stack-size": 8192,
+	"default-stack-size": 16384,
 	"cflags": [
 		"-march=rv32imaczihintpause",
 		"-DTINYGO_CORES=4"
@@ -10,7 +10,8 @@
 		"-march=rv32imac"
 	],
 	"ldflags": [
-		"-melf32lriscv"
+		"-melf32lriscv",
+		"-mllvm", "-enable-machine-outliner=never"
 	],
 	"gdb": [
 		"gdb-multiarch",
@@ -1,6 +1,7 @@
 {
    "inherits": ["cortex-m33"],
    "build-tags": ["rp2350", "rp"],
+    "scheduler": "cores",
    "flash-1200-bps-reset": "true",
    "flash-method": "msd",
    "serial": "usb",
@@ -13,7 +14,8 @@
        "targets/rp2350_embedded_block.s"
    ],
    "ldflags": [
-        "--defsym=__flash_size=2M"
+        "--defsym=__flash_size=2M",
+        "--defsym=__num_stacks=2"
    ],
    "linkerscript": "targets/rp2350.ld",
    "openocd-interface": "picoprobe",
@@ -6,5 +6,6 @@
    "ldflags": [
        "--defsym=__flash_size=4M"
    ],
-    "serial-port": ["2e8a:000f"]
+    "serial-port": ["2e8a:000f"],
+    "default-stack-size": 8192
 }
@@ -1,7 +1,7 @@
 {
    "inherits": ["riscv32"],
    "build-tags": ["tkey"],
-    "features": "+32bit,+c,+zmmul,-a,-b,-d,-e,-experimental-smmpm,-experimental-smnpm,-experimental-ssnpm,-experimental-sspm,-experimental-ssqosid,-experimental-supm,-experimental-zacas,-experimental-zalasr,-experimental-zicfilp,-experimental-zicfiss,-f,-h,-m,-relax,-shcounterenw,-shgatpa,-shtvala,-shvsatpa,-shvstvala,-shvstvecd,-smaia,-smcdeleg,-smcsrind,-smepmp,-smstateen,-ssaia,-ssccfg,-ssccptr,-sscofpmf,-sscounterenw,-sscsrind,-ssstateen,-ssstrict,-sstc,-sstvala,-sstvecd,-ssu64xl,-svade,-svadu,-svbare,-svinval,-svnapot,-svpbmt,-v,-xcvalu,-xcvbi,-xcvbitmanip,-xcvelw,-xcvmac,-xcvmem,-xcvsimd,-xesppie,-xsfcease,-xsfvcp,-xsfvfnrclipxfqf,-xsfvfwmaccqqq,-xsfvqmaccdod,-xsfvqmaccqoq,-xsifivecdiscarddlone,-xsifivecflushdlone,-xtheadba,-xtheadbb,-xtheadbs,-xtheadcmo,-xtheadcondmov,-xtheadfmemidx,-xtheadmac,-xtheadmemidx,-xtheadmempair,-xtheadsync,-xtheadvdot,-xventanacondops,-xwchc,-za128rs,-za64rs,-zaamo,-zabha,-zalrsc,-zama16b,-zawrs,-zba,-zbb,-zbc,-zbkb,-zbkc,-zbkx,-zbs,-zca,-zcb,-zcd,-zce,-zcf,-zcmop,-zcmp,-zcmt,-zdinx,-zfa,-zfbfmin,-zfh,-zfhmin,-zfinx,-zhinx,-zhinxmin,-zic64b,-zicbom,-zicbop,-zicboz,-ziccamoa,-ziccif,-zicclsm,-ziccrse,-zicntr,-zicond,-zicsr,-zifencei,-zihintntl,-zihintpause,-zihpm,-zimop,-zk,-zkn,-zknd,-zkne,-zknh,-zkr,-zks,-zksed,-zksh,-zkt,-ztso,-zvbb,-zvbc,-zve32f,-zve32x,-zve64d,-zve64f,-zve64x,-zvfbfmin,-zvfbfwma,-zvfh,-zvfhmin,-zvkb,-zvkg,-zvkn,-zvknc,-zvkned,-zvkng,-zvknha,-zvknhb,-zvks,-zvksc,-zvksed,-zvksg,-zvksh,-zvkt,-zvl1024b,-zvl128b,-zvl16384b,-zvl2048b,-zvl256b,-zvl32768b,-zvl32b,-zvl4096b,-zvl512b,-zvl64b,-zvl65536b,-zvl8192b",
+    "features": "+32bit,+c,+zmmul,-a,-b,-d,-e,-experimental-sdext,-experimental-sdtrig,-experimental-smctr,-experimental-ssctr,-experimental-svukte,-experimental-xqcia,-experimental-xqciac,-experimental-xqcicli,-experimental-xqcicm,-experimental-xqcics,-experimental-xqcicsr,-experimental-xqciint,-experimental-xqcilo,-experimental-xqcilsm,-experimental-xqcisls,-experimental-zalasr,-experimental-zicfilp,-experimental-zicfiss,-experimental-zvbc32e,-experimental-zvkgs,-f,-h,-m,-relax,-sha,-shcounterenw,-shgatpa,-shtvala,-shvsatpa,-shvstvala,-shvstvecd,-smaia,-smcdeleg,-smcsrind,-smdbltrp,-smepmp,-smmpm,-smnpm,-smrnmi,-smstateen,-ssaia,-ssccfg,-ssccptr,-sscofpmf,-sscounterenw,-sscsrind,-ssdbltrp,-ssnpm,-sspm,-ssqosid,-ssstateen,-ssstrict,-sstc,-sstvala,-sstvecd,-ssu64xl,-supm,-svade,-svadu,-svbare,-svinval,-svnapot,-svpbmt,-svvptc,-v,-xcvalu,-xcvbi,-xcvbitmanip,-xcvelw,-xcvmac,-xcvmem,-xcvsimd,-xesppie,-xmipscmove,-xmipslsp,-xsfcease,-xsfvcp,-xsfvfnrclipxfqf,-xsfvfwmaccqqq,-xsfvqmaccdod,-xsfvqmaccqoq,-xsifivecdiscarddlone,-xsifivecflushdlone,-xtheadba,-xtheadbb,-xtheadbs,-xtheadcmo,-xtheadcondmov,-xtheadfmemidx,-xtheadmac,-xtheadmemidx,-xtheadmempair,-xtheadsync,-xtheadvdot,-xventanacondops,-xwchc,-za128rs,-za64rs,-zaamo,-zabha,-zacas,-zalrsc,-zama16b,-zawrs,-zba,-zbb,-zbc,-zbkb,-zbkc,-zbkx,-zbs,-zca,-zcb,-zcd,-zce,-zcf,-zcmop,-zcmp,-zcmt,-zdinx,-zfa,-zfbfmin,-zfh,-zfhmin,-zfinx,-zhinx,-zhinxmin,-zic64b,-zicbom,-zicbop,-zicboz,-ziccamoa,-ziccif,-zicclsm,-ziccrse,-zicntr,-zicond,-zicsr,-zifencei,-zihintntl,-zihintpause,-zihpm,-zimop,-zk,-zkn,-zknd,-zkne,-zknh,-zkr,-zks,-zksed,-zksh,-zkt,-ztso,-zvbb,-zvbc,-zve32f,-zve32x,-zve64d,-zve64f,-zve64x,-zvfbfmin,-zvfbfwma,-zvfh,-zvfhmin,-zvkb,-zvkg,-zvkn,-zvknc,-zvkned,-zvkng,-zvknha,-zvknhb,-zvks,-zvksc,-zvksed,-zvksg,-zvksh,-zvkt,-zvl1024b,-zvl128b,-zvl16384b,-zvl2048b,-zvl256b,-zvl32768b,-zvl32b,-zvl4096b,-zvl512b,-zvl64b,-zvl65536b,-zvl8192b",
    "cflags": [
        "-march=rv32iczmmul"
    ],
@@ -3,6 +3,7 @@
        "rp2040"
    ],
    "serial-port": ["239a:8109"],
+    "default-stack-size": 8192,
    "build-tags": ["trinkey_qt2040"],
    "ldflags": [
        "--defsym=__flash_size=8192K"
@@ -3,6 +3,7 @@
        "rp2040"
    ],
    "serial-port": ["2e8a:0003"],
+    "default-stack-size": 8192,
    "build-tags": ["tufty2040"],
    "ldflags": [
        "--defsym=__flash_size=1020K"
@@ -1,7 +1,7 @@
 {
 	"llvm-target":   "wasm32-unknown-wasi",
 	"cpu":           "generic",
-	"features":      "+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types",
+	"features":      "+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types",
 	"build-tags":    ["tinygo.wasm"],
 	"goos":          "wasip1",
 	"goarch":        "wasm",
@@ -1,7 +1,7 @@
 {
 	"llvm-target":   "wasm32-unknown-wasi",
 	"cpu":           "generic",
-	"features":      "+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types",
+	"features":      "+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types",
 	"build-tags":    ["tinygo.wasm", "wasip2"],
 	"buildmode":     "c-shared",
 	"goos":          "linux",
@@ -1,7 +1,7 @@
 {
 	"llvm-target":   "wasm32-unknown-unknown",
-	"cpu":           "generic",
-	"features":      "+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types",
+	"cpu":           "mvp",
+	"features":      "+nontrapping-fptoint,+sign-ext,-bulk-memory,-multivalue,-reference-types",
 	"build-tags":    ["tinygo.wasm", "wasm_unknown"],
 	"buildmode":    "c-shared",
 	"goos":          "linux",
@@ -14,6 +14,7 @@
 	"default-stack-size": 4096,
 	"cflags": [
 		"-mnontrapping-fptoint",
+		"-mno-bulk-memory",
 		"-mno-multivalue",
 		"-mno-reference-types",
 		"-msign-ext"
@@ -1,7 +1,7 @@
 {
 	"llvm-target":   "wasm32-unknown-wasi",
 	"cpu":           "generic",
-	"features":      "+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types",
+	"features":      "+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types",
 	"build-tags":    ["tinygo.wasm"],
 	"goos":          "js",
 	"goarch":        "wasm",
@@ -3,6 +3,7 @@
        "rp2040"
    ],
    "serial-port": ["2e8a:0003"],
+    "default-stack-size": 8192,
    "build-tags": ["waveshare_rp2040_tiny"],
    "ldflags": [
        "--defsym=__flash_size=1020K"
@@ -3,6 +3,7 @@
        "rp2040"
    ],
    "serial-port": ["2e8a:0003"],
+    "default-stack-size": 8192,
    "build-tags": ["waveshare_rp2040_zero"],
    "ldflags": [
        "--defsym=__flash_size=1020K"
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
Ayke van Laethem	730da698a3	testing: run cleanups after exiting a benchmark run This is important, otherwise temporary directories don't get removed. Issue found while working on Go 1.20 support.	2025-10-03 10:35:24 +02:00
Ayke van Laethem	073862ee92	fe310: add I2C pins for the HiFive1b	2025-10-02 20:26:25 +02:00
Ayke van Laethem	c820d83ae2	interp: better errors when debugging interp When debugging is enabled for interp, print better errors in a specific case. Before: !! revert because of error: interp: unsupported instruction (to be emitted at runtime) After: !! revert because of error: /usr/local/go1.24.0/src/regexp/syntax/parse.go:927:27: interp: unsupported instruction (to be emitted at runtime) So this adds error location information, which can be quite useful.	2025-10-02 05:42:08 +02:00
Daniel Esteban	109e0767e7	Added Gopher ARCADE board	2025-09-20 08:35:34 +02:00
Ben Krieger	821f2aeae0	Fix linker errors for runtime.vgetrandom and crypto/internal/sysrand.fatal	2025-09-19 15:32:01 +02:00
Piotr Bocheński	93a11e266f	net: update submodule to latest commits Signed-off-by: Piotr Bocheński <piotr@bochen.ski>	2025-09-19 13:14:12 +02:00
rdon	e29e583919	fix: use int64 in ReadTemperature to avoid overflow	2025-09-19 11:30:50 +02:00
Michael Smith	310df7acb5	fix(rp2): reset spinlocks at startup	2025-09-19 02:22:36 -04:00
Michael Smith	b9387febe0	fix(rp2): use side-effect-free spinlocks	2025-09-19 02:22:36 -04:00
Michael Smith	3dce224183	fix(rp2): switch spinlock busy loop to wfe	2025-09-19 02:22:36 -04:00
Michael Smith	5d8afa25b8	fix(rp2): disable DBGPAUSE on startup	2025-09-19 02:22:36 -04:00
deadprogram	0dca016749	fix: remove macOS 15 from CI build matrix. It was already being tested by the test-macos-homebrew job, and it conflicts with the actual build that we want, which is macOS 14 for backwards-compatibility. Signed-off-by: deadprogram <ron@hybridgroup.com>	2025-09-19 01:01:58 -04:00
deadprogram	28a911bcce	fix: point the submodule for musl-lib to a mirror in the TinyGo GitHub org. The git server for git.musl-libc.org is having troubles, and it also seems like a safer bet to have our own mirror just in case. Signed-off-by: deadprogram <ron@hybridgroup.com>	2025-09-19 01:01:58 -04:00
deadprogram	eb36120c6e	ci: several improvements to the macOS GH actions build including: - do not install cmake, instead use the version already installed - add macOS 15 to the CI builds - update a could of GH actions to latest release - update Go version being use to Go 1.25.1 Signed-off-by: deadprogram <ron@hybridgroup.com>	2025-09-18 08:24:29 -04:00
Ayke van Laethem	dfbb133ea6	all: add full LLVM 20 support This switches the Espressif fork from LLVM 19 to LLVM 20, so we can use the improvements made between those LLVM versions. It also better aligns with the system-LLVM build method, which currently also defaults to LLVM 20. Note that this disables the machine outliner for RISC-V. It appears there's a bug in there somewhere, with the machine outliner enabled the crypto/elliptic package tests fail with -target=riscv-qemu. This should ideally be investigated and reported upstream.	2025-09-17 05:28:06 -04:00
deadprogram	79ab77facd	fix: correct linter issues exposed by the fix in #4679 Signed-off-by: deadprogram <ron@hybridgroup.com>	2025-09-14 08:03:25 -04:00
Matt Mets	2c99692019	Move the directory list into a variable	2025-09-14 08:03:25 -04:00
Matt Mets	0ca0aad7ce	Fix for #4678 : top-level 'make lint' wasn't working The revive command seems to have had a syntax error in the file input glob. It appears to have been broken in a way that did not result in a return code being set. This change uses 'find' to build the input to the linter. Note that it is expected to fail the CI script, because it is uncovering some existing lint issues that were not being caught.	2025-09-14 08:03:25 -04:00
Michael Smith	3ddba4e620	fix: add TryLock to sync.RWMutex	2025-09-13 11:04:07 -04:00
luoliwoshang	eab3dceb48	fix/typo:makeESPFirmwareImage	2025-09-12 14:04:22 -04:00
Michael Smith	663a94fcab	feat: enable //go:linkname pragma for globals	2025-09-12 12:53:34 -04:00
Michael Smith	373ca88f14	fix: expand RTT debugger compatibility	2025-09-12 12:53:34 -04:00
Ayke van Laethem	be33de1086	GNUmakefile: shrink TinyGo binaries on Linux With these flags, the TinyGo binary gets 18.8MB (11.6%) smaller. That seems like a quite useful win for such a small change! This is only for Linux for now. MacOS and Windows can be tested later, the flags for those probably need to be modified. Originally inspired by: https://discourse.llvm.org/t/state-of-the-art-for-reducing-executable-size-with-heavily-optimized-program/87952/18 There are some other flags like -Wl,--pack-dyn-relocs=relr that did not shrink binary size in my testing, so I've left them out. This also switches the linker to prefer mold or lld over the default linker, since the system linker is usually ld.bfd which is very slow. (Also, for some reason mold produces smaller binaries than lld).	2025-09-12 05:29:08 -04:00
deadprogram	e5bdfb0962	fix: increase the timeout for chromedp to connect to the headless browser used for running the wasm tests. Also add favicon link to avoid extra fetches during test runs. Signed-off-by: deadprogram <ron@hybridgroup.com>	2025-09-11 08:34:38 -04:00
deadprogram	e80c6c48a1	chore: create separate go.mod file for testing dependencies for wasm tests that use Chromium headless browser to avoid use of older incompatible version. Signed-off-by: deadprogram <ron@hybridgroup.com>	2025-09-11 08:34:38 -04:00
Thomas Kohler	381644a0c0	machine,nrf528: stop the bus only once on I2C bus error and ensures the first error is returned In some cases, e.g nothing connected on the bus, repeated resume-stop sequences can lead to the bus never reaching the stop state, hanging Tx. This change ensures the resume-stop sequence is submitted once on error. It also moves the error code read to before the sequence to ensure it's valid. Fixes: #4998	2025-09-09 12:49:29 -04:00
luoliwoshang	13bb59c334	ci:uninstall cmake before install	2025-09-09 06:39:26 -04:00
Ayke van Laethem	632e5f9872	rp2040: allow writing to the UART inside interrupts Writing to the UART takes time and that may not be a good idea inside an interrupt, but it is essential for debugging sometimes (especially since USB-CDC typically doesn't work inside an interrupt). This fixes UART support in interrupts for the RP2040 at least. You can test it with `-serial=uart` and connecting a USB-UART adapter to the right pins.	2025-09-03 10:50:10 -04:00
sago35	37531930b8	chore: update version for 0.40 development cycle	2025-09-02 07:14:45 -04:00
deadprogram	3869f76887	all: prepare for release 0.39.0 Signed-off-by: deadprogram <ron@hybridgroup.com>	2025-08-19 14:03:57 +02:00
deadprogram	3e76703ff5	targets: set default stanck size to 8k for rp2040/rp2350 based boards where this was not already the case. Signed-off-by: deadprogram <ron@hybridgroup.com>	2025-08-18 12:23:51 +02:00
deadprogram	deb48dd5f0	fix: update version of clang to 17 to accomodate latest Go 1.25 docker base image Signed-off-by: deadprogram <ron@hybridgroup.com>	2025-08-14 15:01:07 +02:00
deadprogram	73fa5cd7bc	fix: disable test-newest since CircleCI seems unable to download due to rate-limits on Dockerhub Signed-off-by: deadprogram <ron@hybridgroup.com>	2025-08-14 11:30:27 +02:00
deadprogram	1be7582106	chore: update all CI builds to test Go 1.25 release Signed-off-by: deadprogram <ron@hybridgroup.com>	2025-08-14 11:30:27 +02:00
deadprogram	d5b7cdbca3	net: update to latest tinygo net package Signed-off-by: deadprogram <ron@hybridgroup.com>	2025-08-12 18:34:27 +02:00
Michael Smith	c769262398	feat: add metro-rp2350 board definition (#4989 ) * feat: add metro-rp2350 board definition * chore: add smoke test	2025-08-10 09:32:16 +02:00
Michael Smith	64caab1ade	feat: enable multi-core scheduler for rp2350	2025-08-08 13:09:38 +02:00
Elias Naur	78914382c3	runtime: ensure time.Sleep(d) sleeps at least d Account for the sleep queue base time in the computation of the wakeup time. Tested with the following program on pico2. func main() { go func() { for i := range 60 { const delay = 20 * time.Millisecond before := time.Now() time.Sleep(delay) if d := time.Since(before); true \|\| d < delay { log.Println(i, "actual", d, "delay", delay) } } }() time.Sleep(500 * time.Millisecond) log.Println("****** done sleeping ****") select {} } Without this change, the program would print lines such as: 17 actual 15.494ms delay 20ms 18 actual 15.49ms delay 20ms 19 actual 15.585ms delay 20ms 20 actual 15.493ms delay 20ms 21 actual 15.494ms delay 20ms 22 actual 15.487ms delay 20ms 23 actual 15.498ms delay 20ms **** done sleeping ****** 24 actual 15.548ms delay 20ms 25 actual 20.011ms delay 20ms 26 actual 20.01ms delay 20ms 27 actual 20.011ms delay 20ms 28 actual 20.015ms delay 20ms Note that while more than one sleeping goroutine is in the timer queue, the sleep duration is 5ms short.	2025-08-08 01:32:42 +02:00
あーるどん	15e37ff927	flash: add -o flag support to save built binary (Fixes #4937 ) (#4942 ) * Add -o flag support to flash command. Fixes #4937 * Remove empty outpath check in validateOutputFormat --------- Co-authored-by: rdon <you@example.com>	2025-08-07 23:38:15 +02:00
deadprogram	91234060be	chore: update all CI builds to test Go 1.25rc3 Signed-off-by: deadprogram <ron@hybridgroup.com>	2025-08-07 12:31:23 +02:00
Ayke van Laethem	b33b6ce293	all: add Go 1.25 support	2025-08-06 17:08:26 +02:00
Ayke van Laethem	8911abbc6d	runtime: stub out weak pointer support	2025-08-06 17:08:26 +02:00
Ayke van Laethem	bc77922d47	testing: stub out testing.B.Loop This gets the path package tests to pass, so we can move ahead with Go 1.25. It should be implemented in the future at some point (that, or we'll use the upstream testing package instead).	2025-08-06 17:08:26 +02:00
Ayke van Laethem	34efc3a381	compiler: implement internal/abi.Escape	2025-08-06 17:08:26 +02:00
Ayke van Laethem	5c46efb4d1	runtime: implement dummy AddCleanup	2025-08-06 17:08:26 +02:00
Ayke van Laethem	d6343d9d5c	sync: implement sync.Swap	2025-08-06 17:08:26 +02:00
Ayke van Laethem	e368551919	reflect: implement Method.IsExported	2025-08-06 17:08:26 +02:00
Ayke van Laethem	8b4624a420	ci: rename some jobs to avoid churn on every Go/LLVM version bump	2025-08-06 17:08:26 +02:00
Ayke van Laethem	9fd1b7b1a8	ci: make the goroutines test less racy Since we switched to OS threads for goroutines, the testdata/goroutines.go test has been flaky. Not surprising, if threads need to be scheduled within 1ms on a busy CI system. This PR makes the test a bit less flaky (hopefully) by increasing the time to 100ms.	2025-08-06 16:13:04 +02:00
Ayke van Laethem	a38829c692	internal/task: use -stack-size flag when starting a new thread Found this bug while trying to use the upstream testing package instead of our own. The io/fs package wasn't passing, because the test was run in a separate goroutine (and therefore a separate thread, with its own stack) instead of all in the same thread with our own stack creation/switching implementation.	2025-08-05 20:32:59 +02:00
Ayke van Laethem	1dbc6c83c4	internal/task: add SA_RESTART flag to GC interrupts This makes sure system calls like read don't return EINTR but instead restart the call on an interrupt. This is by far the more sensible option, the default POSIX behavior of returning EINTR is extremely error-prone. Found this bug while trying to use the upstream testing package instead of our own.	2025-08-05 14:09:03 +02:00
Ayke van Laethem	9a6071920f	main: show the compiler erro (if any) for `tinygo test -c` This fixes the bug that if there was a compiler error, it was silently ignored.	2025-08-05 07:33:26 +02:00