usb/msc: wait for interrupt instead of polling a flag

This should make usb/msc a whole lot more efficient by pausing the
worker goroutine and waiting for an interrupt to unpause it instead of
waiting in a loop and sleeping for 0.1ms each cycle.

In other words, this should make it both faster (no unnecessary delay
due to the time.Sleep) and more efficient (no polling).

.github/workflows/build-macos.yml

@@ -40,7 +40,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v6
         with:
-          go-version: '1.26.4'
+          go-version: '1.26.2'
           cache: true
       - name: Restore LLVM source cache
         uses: actions/cache/restore@v5
@@ -131,7 +131,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v6
         with:
-          go-version: '1.26.4'
+          go-version: '1.26.2'
           cache: true
       - name: Build TinyGo (LLVM ${{ matrix.version }})
         run: go install -tags=llvm${{ matrix.version }}

.github/workflows/compat.yml

@@ -1,72 +0,0 @@
-# This CI job checks whether at least the smoke tests pass for the oldest
-# Go/LLVM version we claim to support.
-
-name: Version compatibility test
-
-on:
-  pull_request:
-  push:
-    branches:
-      - dev
-      - release
-
-concurrency:
-  group: ${{ github.workflow }}-${{ github.ref }}
-  cancel-in-progress: true
-
-jobs:
-  test-compat:
-    runs-on: ubuntu-22.04 # this must be a specific version for the apt install below
-    env:
-      # Oldest versions currently supported by TinyGo
-      LLVM: "15"
-      Go: "1.24" # when updating this, also update minorMin in builder/config.go
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v6
-        with:
-          submodules: true
-      - name: Install Go
-        uses: actions/setup-go@v6
-        with:
-          go-version: ${{ env.Go }}
-          cache: true
-      - name: Install LLVM
-        run: |
-          echo 'deb https://apt.llvm.org/jammy/ llvm-toolchain-jammy-${{ env.LLVM }} main' | sudo tee /etc/apt/sources.list.d/llvm.list
-          wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | sudo apt-key add -
-          sudo apt-get update
-          sudo apt-get install --no-install-recommends -y \
-              llvm-${{ env.LLVM }}-dev \
-              clang-${{ env.LLVM }} \
-              libclang-${{ env.LLVM }}-dev \
-              lld-${{ env.LLVM }} \
-              binaryen
-      - name: Restore LLVM source cache
-        uses: actions/cache/restore@v5
-        id: cache-llvm-source
-        with:
-          key: llvm-source-20-linux-compat
-          path: llvm-project/compiler-rt
-      - name: Download LLVM source
-        if: steps.cache-llvm-source.outputs.cache-hit != 'true'
-        run: make llvm-source
-      - name: Save LLVM source cache
-        uses: actions/cache/save@v5
-        if: steps.cache-llvm-source.outputs.cache-hit != 'true'
-        with:
-          key: ${{ steps.cache-llvm-source.outputs.cache-primary-key }}
-          path: llvm-project/compiler-rt
-      - name: Go cache
-        uses: actions/cache@v5
-        with:
-          path: |
-            ~/.cache/go-build
-            ~/go/pkg/mod
-          key: go-build-${{ env.Go }}-llvm${{ env.LLVM }}-${{ hashFiles('go.sum') }}
-      - name: Build TinyGo
-        run: go install -tags=llvm${{ env.LLVM }}
-      - run: tinygo version
-      - run: make gen-device -j4
-      - run: go test -tags=llvm${{ env.LLVM }} -short -skip=TestErrors
-      - run: make smoketest XTENSA=0

.github/workflows/linux.yml

@@ -12,24 +12,6 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
-  go-mod-tidy:
-    # Check that go.sum is up to date.
-    runs-on: ubuntu-slim
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v6
-        with:
-          submodules: true
-      - name: Install Go
-        uses: actions/setup-go@v6
-        with:
-          go-version: '1.26.4'
-          cache: true
-      - name: Run go mod tidy
-        run: go mod tidy
-      - name: Check go.mod and go.sum are up to date
-        run: git diff --exit-code
-
   build-linux:
     # Build Linux binaries, ready for release.
     # This runs inside an Alpine Linux container so we can more easily create a
@@ -160,7 +142,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v6
         with:
-          go-version: '1.26.4'
+          go-version: '1.26.2'
           cache: true
       - name: Install wasmtime
         uses: bytecodealliance/actions/wasmtime/setup@v1
@@ -204,12 +186,12 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v6
         with:
-          go-version: '1.26.4'
+          go-version: '1.26.2'
           cache: true
       - name: Install Node.js
         uses: actions/setup-node@v6
         with:
-          node-version: '22'
+          node-version: '18'
       - name: Install wasmtime
         uses: bytecodealliance/actions/wasmtime/setup@v1
         with:
@@ -284,8 +266,6 @@ jobs:
       - run: make smoketest
       - run: make wasmtest
       - run: make tinygo-test-baremetal
-      - name: Check Go code formatting
-        run: make fmt-check lint
   build-linux-cross:
     # Build ARM Linux binaries, ready for release.
     # This intentionally uses an older Linux image, so that we compile against
@@ -323,7 +303,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v6
         with:
-          go-version: '1.26.4'
+          go-version: '1.26.2'
           cache: true
       - name: Restore LLVM source cache
         uses: actions/cache/restore@v5

.github/workflows/windows.yml

@@ -17,6 +17,12 @@ jobs:
     outputs:
       version: ${{ steps.version.outputs.version }}
     steps:
+      - name: Configure pagefile
+        uses: al-cheb/configure-pagefile-action@v1.4
+        with:
+          minimum-size: 8GB
+          maximum-size: 24GB
+          disk-root: "C:"
       - uses: MinoruSekine/setup-scoop@v4
       - name: Install Dependencies
         shell: bash
@@ -34,13 +40,13 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v6
         with:
-          go-version: '1.26.4'
+          go-version: '1.26.2'
           cache: true
       - name: Restore cached LLVM source
         uses: actions/cache/restore@v5
         id: cache-llvm-source
         with:
-          key: llvm-source-20-windows-v3
+          key: llvm-source-20-windows-v1
           path: |
             llvm-project/clang/lib/Headers
             llvm-project/clang/include
@@ -65,7 +71,7 @@ jobs:
         uses: actions/cache/restore@v5
         id: cache-llvm-build
         with:
-          key: llvm-build-20-windows-v5
+          key: llvm-build-20-windows-v2
           path: llvm-build
       - name: Build LLVM
         if: steps.cache-llvm-build.outputs.cache-hit != 'true'
@@ -87,7 +93,7 @@ jobs:
       - name: Cache Go cache
         uses: actions/cache@v5
         with:
-          key: go-cache-windows-v3-${{ hashFiles('go.mod') }}
+          key: go-cache-windows-v2-${{ hashFiles('go.mod') }}
           path: |
             C:/Users/runneradmin/AppData/Local/go-build
             C:/Users/runneradmin/go/pkg/mod
@@ -118,6 +124,12 @@ jobs:
     runs-on: windows-2022
     needs: build-windows
     steps:
+      - name: Configure pagefile
+        uses: al-cheb/configure-pagefile-action@v1.4
+        with:
+          minimum-size: 8GB
+          maximum-size: 24GB
+          disk-root: "C:"
       - uses: MinoruSekine/setup-scoop@v4
       - name: Install Dependencies
         shell: bash
@@ -129,7 +141,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v6
         with:
-          go-version: '1.26.4'
+          go-version: '1.26.2'
           cache: true
       - name: Download TinyGo build
         uses: actions/download-artifact@v8
@@ -145,12 +157,18 @@ jobs:
     runs-on: windows-2022
     needs: build-windows
     steps:
+      - name: Configure pagefile
+        uses: al-cheb/configure-pagefile-action@v1.4
+        with:
+          minimum-size: 8GB
+          maximum-size: 24GB
+          disk-root: "C:"
       - name: Checkout
         uses: actions/checkout@v6
       - name: Install Go
         uses: actions/setup-go@v6
         with:
-          go-version: '1.26.4'
+          go-version: '1.26.2'
           cache: true
       - name: Download TinyGo build
         uses: actions/download-artifact@v8
@@ -165,6 +183,12 @@ jobs:
     runs-on: windows-2022
     needs: build-windows
     steps:
+      - name: Configure pagefile
+        uses: al-cheb/configure-pagefile-action@v1.4
+        with:
+          minimum-size: 8GB
+          maximum-size: 24GB
+          disk-root: "C:"
       - uses: MinoruSekine/setup-scoop@v4
       - name: Install Dependencies
         shell: bash
@@ -176,7 +200,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v6
         with:
-          go-version: '1.26.4'
+          go-version: '1.26.2'
           cache: true
       - name: Download TinyGo build
         uses: actions/download-artifact@v8

GNUmakefile

@@ -142,9 +142,6 @@ ifeq ($(OS),Windows_NT)
 
     # PIC needs to be disabled for libclang to work.
     LLVM_OPTION += -DLLVM_ENABLE_PIC=OFF
-    # Statically link the C++ and GCC runtime into LLVM tools so they don't
-    # depend on MinGW DLLs that may not be on PATH when executed during the build.
-    LLVM_OPTION += '-DCMAKE_EXE_LINKER_FLAGS=-static-libgcc -static-libstdc++'
 
     CGO_CPPFLAGS += -DCINDEX_NO_EXPORTS
     CGO_LDFLAGS += -static -static-libgcc -static-libstdc++
@@ -197,12 +194,6 @@ NINJA_BUILD_TARGETS = clang llvm-config llvm-ar llvm-nm lld $(addprefix lib/lib,
 ifneq ("$(wildcard $(LLVM_BUILDDIR)/bin/llvm-config*)","")
     CGO_CPPFLAGS+=$(shell $(LLVM_CONFIG_PREFIX) $(LLVM_BUILDDIR)/bin/llvm-config --cppflags) -I$(abspath $(LLVM_BUILDDIR))/tools/clang/include -I$(abspath $(CLANG_SRC))/include -I$(abspath $(LLD_SRC))/include
     CGO_CXXFLAGS=-std=c++17
-ifneq ($(uname),Windows_NT)
-    # Disable GCC DWARF compression: lld built without zlib cannot link
-    # object files with ELFCOMPRESS_ZLIB debug sections.
-    CGO_CFLAGS+=-gz=none
-    CGO_CXXFLAGS+=-gz=none
-endif
     CGO_LDFLAGS+=-L$(abspath $(LLVM_BUILDDIR)/lib) -lclang $(CLANG_LIBS) $(LLD_LIBS) $(shell $(LLVM_CONFIG_PREFIX) $(LLVM_BUILDDIR)/bin/llvm-config --ldflags --libs --system-libs $(LLVM_COMPONENTS)) -lstdc++ $(CGO_LDFLAGS_EXTRA)
 endif
 
@@ -307,7 +298,7 @@ wasi-cm:
 	rsync -rv --delete --exclude go.mod --exclude '*_test.go' --exclude '*_json.go' --exclude '*.md' --exclude LICENSE $(shell go list -m -f {{.Dir}} $(WASM_TOOLS_MODULE)/cm)/ ./src/internal/cm
 
 # Check for Node.js used during WASM tests.
-MIN_NODEJS_VERSION=22
+MIN_NODEJS_VERSION=18
 
 .PHONY: check-nodejs-version
 check-nodejs-version:
@@ -319,7 +310,7 @@ check-nodejs-version:
 
 tinygo: ## Build the TinyGo compiler
 	@if [ ! -f "$(LLVM_BUILDDIR)/bin/llvm-config" ]; then echo "Fetch and build LLVM first by running:"; echo "  $(MAKE) llvm-source"; echo "  $(MAKE) $(LLVM_BUILDDIR)"; exit 1; fi
-	CGO_CPPFLAGS="$(CGO_CPPFLAGS)" CGO_CFLAGS="$(CGO_CFLAGS)" CGO_CXXFLAGS="$(CGO_CXXFLAGS)" CGO_LDFLAGS="$(CGO_LDFLAGS)" $(GOENVFLAGS) $(GO) build -buildmode exe -o build/tinygo$(EXE) -tags "byollvm osusergo" .
+	CGO_CPPFLAGS="$(CGO_CPPFLAGS)" CGO_CXXFLAGS="$(CGO_CXXFLAGS)" CGO_LDFLAGS="$(CGO_LDFLAGS)" $(GOENVFLAGS) $(GO) build -buildmode exe -o build/tinygo$(EXE) -tags "byollvm osusergo" .
 test: check-nodejs-version
 	CGO_CPPFLAGS="$(CGO_CPPFLAGS)" CGO_CXXFLAGS="$(CGO_CXXFLAGS)" CGO_LDFLAGS="$(CGO_LDFLAGS)" $(GO) test $(GOTESTFLAGS) -timeout=1h -buildmode exe -tags "byollvm osusergo" $(GOTESTPKGS)
 
@@ -388,22 +379,22 @@ TEST_PACKAGES_FAST = \
 # archive/zip requires os.ReadAt, which is not yet supported on windows
 # bytes requires mmap
 # compress/flate appears to hang on wasi
-# crypto/aes needs reflect.Type.Method(), not yet implemented
+# crypto/aes fails on wasi, needs panic()/recover()
 # crypto/des fails on wasi, needs panic()/recover()
 # crypto/hmac fails on wasi, it exits with a "slice out of range" panic
 # debug/plan9obj requires os.ReadAt, which is not yet supported on windows
 # encoding/xml takes a minute on linux and gives a stack overflow on wasi
-# image fails on wasi, needs panic()/recover()
+# image requires recover(), which is not yet supported on wasi
 # io/ioutil requires os.ReadDir, which is not yet supported on windows or wasi
-# mime: fails on wasi, needs panic()/recover()
+# mime: fail on wasi; neds panic()/recover()
 # mime/multipart: needs wasip1 syscall.FDFLAG_NONBLOCK
 # mime/quotedprintable requires syscall.Faccessat
 # net/mail: needs wasip1  syscall.FDFLAG_NONBLOCK
 # net/ntextproto: needs wasip1 syscall.FDFLAG_NONBLOCK
-# regexp/syntax: fails on wasip1, needs panic()/recover()
+# regexp/syntax: fails on wasip1; needs panic()/recover()
-# strconv: fails on wasi, needs panic()/recover()
+# strconv requires recover() which is not yet supported on wasi
-# text/tabwriter: fails on wasi, needs panic()/recover()
+# text/tabwriter requires recover(), which is not yet supported on wasi
-# text/template/parse: fails on wasi, needs panic()/recover()
+# text/template/parse requires recover(), which is not yet supported on wasi
 # testing/fstest requires os.ReadDir, which is not yet supported on windows or wasi
 
 # Additional standard library packages that pass tests on individual platforms
@@ -413,7 +404,6 @@ TEST_PACKAGES_LINUX := \
 	context \
 	crypto/aes \
 	crypto/des \
-	crypto/ecdh \
 	crypto/hmac \
 	debug/dwarf \
 	debug/plan9obj \
@@ -429,7 +419,6 @@ TEST_PACKAGES_LINUX := \
 	os/user \
 	regexp/syntax \
 	strconv \
-	testing/fstest \
 	text/tabwriter \
 	text/template/parse
 
@@ -440,11 +429,7 @@ TEST_PACKAGES_WINDOWS := \
 	compress/flate \
 	crypto/des \
 	crypto/hmac \
-	image \
-	mime \
-	regexp/syntax \
 	strconv \
-	text/tabwriter \
 	text/template/parse \
 	$(nil)
 
@@ -493,12 +478,10 @@ report-stdlib-tests-pass:
 ifeq ($(uname),Darwin)
 TEST_PACKAGES_HOST := $(TEST_PACKAGES_FAST) $(TEST_PACKAGES_DARWIN)
 TEST_IOFS := true
-TEST_ENCODING_XML := true
 endif
 ifeq ($(uname),Linux)
 TEST_PACKAGES_HOST := $(TEST_PACKAGES_FAST) $(TEST_PACKAGES_LINUX)
 TEST_IOFS := true
-TEST_ENCODING_XML := true
 endif
 ifeq ($(OS),Windows_NT)
 TEST_PACKAGES_HOST := $(TEST_PACKAGES_FAST) $(TEST_PACKAGES_WINDOWS)
@@ -513,11 +496,8 @@ TEST_ADDITIONAL_FLAGS ?=
 .PHONY: tinygo-test
 tinygo-test:
 	@# TestExtraMethods: used by many crypto packages and uses reflect.Type.Method which is not implemented.
-	@# TestParseAndBytesRoundTrip/P256/Generic: needs Goexit to run defers on wasm.
+	@# TestParseAndBytesRoundTrip/P256/Generic: relies on t.Skip() which is not implemented
-	$(TINYGO) test $(TEST_ADDITIONAL_FLAGS) $(TEST_SKIP_FLAG) $(filter-out encoding/xml,$(TEST_PACKAGES_HOST)) $(TEST_PACKAGES_SLOW)
+	$(TINYGO) test $(TEST_ADDITIONAL_FLAGS) $(TEST_SKIP_FLAG) $(TEST_PACKAGES_HOST) $(TEST_PACKAGES_SLOW)
-ifeq ($(TEST_ENCODING_XML),true)
-	$(TINYGO) test $(TEST_ADDITIONAL_FLAGS) $(TEST_SKIP_FLAG) -stack-size=16MB encoding/xml
-endif
 	@# io/fs requires os.ReadDir, not yet supported on windows or wasi. It also
 	@# requires a large stack-size. Hence, io/fs is only run conditionally.
 	@# For more details, see the comments on issue #3143.
@@ -762,8 +742,6 @@ endif
 	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=xiao                examples/blinky1
 	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=xiao-ble-plus       examples/blinky1
-	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=rak4631             examples/blinky1
 	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=circuitplay-express examples/dac
@@ -800,8 +778,6 @@ endif
 	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=pico                examples/blinky1
 	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=pico -gc=leaking    examples/blinky1
-	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=nano-33-ble         examples/blinky1
 	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=nano-rp2040         examples/blinky1
@@ -911,8 +887,6 @@ ifneq ($(STM32), 0)
 	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=stm32l0x1           examples/serial
 	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=stm32u031           examples/empty
-	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=arduino-uno-q       examples/blinky1
 	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=arduino-uno-q       examples/serial
@@ -973,11 +947,6 @@ ifneq ($(XTENSA), 0)
 	@$(MD5SUM) test.bin
 	$(TINYGO) build -size short -o test.bin -target mch2022             examples/machinetest
 	@$(MD5SUM) test.bin
-	# xiao-esp32c6
-	$(TINYGO) build -size short -o test.bin -target=xiao-esp32c6      	examples/blinky1
-	@$(MD5SUM) test.bin
-	$(TINYGO) build -size short -o test.bin -target=xiao-esp32c6   		examples/blinkm
-	@$(MD5SUM) test.bin
 	# xiao-esp32s3
 	$(TINYGO) build -size short -o test.bin -target=xiao-esp32s3   		examples/blinky1
 	@$(MD5SUM) test.bin
@@ -998,8 +967,6 @@ ifneq ($(XTENSA), 0)
 	@$(MD5SUM) test.bin
 	$(TINYGO) build -size short -o test.bin -target=esp32s3-supermini   	examples/adc
 	@$(MD5SUM) test.bin
-	$(TINYGO) build -size short -o test.bin -target=esp32s3-box-3       examples/blinky1
-	@$(MD5SUM) test.bin
 endif
     # esp32c3-supermini
 	$(TINYGO) build -size short -o test.bin -target=esp32c3-supermini	    examples/blinky1
@@ -1196,8 +1163,8 @@ endif
 	@cp -rp lib/wasi-libc/libc-top-half/musl/src/unistd             build/release/tinygo/lib/wasi-libc/libc-top-half/musl/src
 	@cp -rp lib/wasi-libc/libc-top-half/sources                     build/release/tinygo/lib/wasi-libc/libc-top-half
 	@cp -rp lib/wasi-cli/wit                                        build/release/tinygo/lib/wasi-cli/wit
-	@cp -rp ${LLVM_PROJECTDIR}/compiler-rt/lib/builtins build/release/tinygo/lib/compiler-rt-builtins
+	@cp -rp llvm-project/compiler-rt/lib/builtins build/release/tinygo/lib/compiler-rt-builtins
-	@cp -rp ${LLVM_PROJECTDIR}/compiler-rt/LICENSE.TXT  build/release/tinygo/lib/compiler-rt-builtins
+	@cp -rp llvm-project/compiler-rt/LICENSE.TXT  build/release/tinygo/lib/compiler-rt-builtins
 	@cp -rp src                          build/release/tinygo/src
 	@cp -rp targets                      build/release/tinygo/targets
 

builder/build.go

@@ -14,7 +14,6 @@ import (
 	"fmt"
 	"go/types"
 	"hash/crc32"
-	"maps"
 	"math/bits"
 	"os"
 	"os/exec"
@@ -138,7 +137,9 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 		if _, ok := globalValues[pkgPath]; !ok {
 			globalValues[pkgPath] = map[string]string{}
 		}
-		maps.Copy(globalValues[pkgPath], vals)
+		for k, v := range vals {
+			globalValues[pkgPath][k] = v
+		}
 	}
 
 	// Check for a libc dependency.
@@ -277,6 +278,7 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 
 	var embedFileObjects []*compileJob
 	for _, pkg := range lprogram.Sorted() {
+		pkg := pkg // necessary to avoid a race condition
 
 		var undefinedGlobals []string
 		for name := range globalValues[pkg.Pkg.Path()] {
@@ -773,6 +775,7 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 	// TODO: do this as part of building the package to be able to link the
 	// bitcode files together.
 	for _, pkg := range lprogram.Sorted() {
+		pkg := pkg
 		for _, filename := range pkg.CFiles {
 			abspath := filepath.Join(pkg.OriginalDir(), filename)
 			job := &compileJob{
@@ -839,25 +842,22 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 			}
 			ldflags = append(ldflags, "-mllvm", "-mcpu="+config.CPU())
 			ldflags = append(ldflags, "-mllvm", "-mattr="+config.Features()) // needed for MIPS softfloat
-			switch config.LinkerFlavor() {
+			if config.GOOS() == "windows" {
-			case "coff":
+				// Options for the MinGW wrapper for the lld COFF linker.
-				// Options for driving ld.lld in PE/COFF mode.
 				ldflags = append(ldflags,
 					"-Xlink=/opt:lldlto="+strconv.Itoa(speedLevel),
 					"--thinlto-cache-dir="+filepath.Join(cacheDir, "thinlto"))
-			case "darwin":
+			} else if config.GOOS() == "darwin" {
 				// Options for the ld64-compatible lld linker.
 				ldflags = append(ldflags,
 					"--lto-O"+strconv.Itoa(speedLevel),
 					"-cache_path_lto", filepath.Join(cacheDir, "thinlto"))
-			case "gnu":
+			} else {
 				// Options for the ELF linker.
 				ldflags = append(ldflags,
 					"--lto-O"+strconv.Itoa(speedLevel),
 					"--thinlto-cache-dir="+filepath.Join(cacheDir, "thinlto"),
 				)
-			default:
-				return fmt.Errorf("unknown linker flavor: %s", config.LinkerFlavor())
 			}
 			if config.CodeModel() != "default" {
 				ldflags = append(ldflags,
@@ -914,7 +914,7 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 			}
 
 			// Run wasm-opt for wasm binaries
-			if arch, _, _ := strings.Cut(config.Triple(), "-"); arch == "wasm32" {
+			if arch := strings.Split(config.Triple(), "-")[0]; arch == "wasm32" {
 				optLevel, _, _ := config.OptLevel()
 				opt := "-" + optLevel
 
@@ -1076,7 +1076,7 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 		if err != nil {
 			return result, err
 		}
-	case "esp32", "esp32-img", "esp32c3", "esp32s3", "esp32c6", "esp8266":
+	case "esp32", "esp32-img", "esp32c3", "esp32s3", "esp8266":
 		// Special format for the ESP family of chips (parsed by the ROM
 		// bootloader).
 		result.Binary = filepath.Join(tmpdir, "main"+outext)
@@ -1352,14 +1352,6 @@ func determineStackSizes(mod llvm.Module, executable string) ([]string, map[stri
 	}
 	baseStackSize, baseStackSizeType, baseStackSizeFailedAt := functions["tinygo_startTask"][0].StackSize()
 
-	// Account for the bytes that tinygo_swapTask pushes onto the goroutine stack
-	// on every context switch. The static analysis correctly traces Go calls,
-	// but it cannot see into the assembly-level register push.
-	var contextSwitchOverhead uint64
-	if swapFuncs, ok := functions["tinygo_swapTask"]; ok && len(swapFuncs) == 1 {
-		contextSwitchOverhead = swapFuncs[0].FrameSize
-	}
-
 	sizes := make(map[string]functionStackSize)
 
 	// Add the reset handler function, for convenience. The reset handler runs
@@ -1408,12 +1400,6 @@ func determineStackSizes(mod llvm.Module, executable string) ([]string, map[stri
 			// overflow will occur even before the goroutine is started.
 			stackSize = baseStackSize
 		}
-		if stackSizeType == stacksize.Bounded {
-			// Add the overhead of context switching. This is needed because the
-			// context switch (tinygo_swapTask) pushes callee-saved registers
-			// onto the current stack, which is not seen by the static analysis.
-			stackSize += contextSwitchOverhead
-		}
 		sizes[name] = functionStackSize{
 			stackSize:        stackSize,
 			stackSizeType:    stackSizeType,

builder/builder_test.go

@@ -28,7 +28,6 @@ func TestClangAttributes(t *testing.T) {
 		"cortex-m4",
 		"cortex-m7",
 		"esp32c3",
-		"esp32c6",
 		"esp32s3",
 		"fe310",
 		"gameboy-advance",
@@ -47,6 +46,7 @@ func TestClangAttributes(t *testing.T) {
 		targetNames = append(targetNames, "esp32", "esp8266")
 	}
 	for _, targetName := range targetNames {
+		targetName := targetName
 		t.Run(targetName, func(t *testing.T) {
 			testClangAttributes(t, &compileopts.Options{Target: targetName})
 		})

builder/cc.go

@@ -281,7 +281,7 @@ func parseDepFile(s string) ([]string, error) {
 	s = strings.ReplaceAll(s, "\\\n", " ")
 
 	// Only use the first line, which is expected to begin with "deps:".
-	line, _, _ := strings.Cut(s, "\n")
+	line := strings.SplitN(s, "\n", 2)[0]
 	if !strings.HasPrefix(line, "deps:") {
 		return nil, errors.New("readDepFile: expected 'deps:' prefix")
 	}

builder/commands.go

@@ -17,7 +17,7 @@ import (
 var commands = map[string][]string{}
 
 func init() {
-	llvmMajor, _, _ := strings.Cut(llvm.Version, ".")
+	llvmMajor := strings.Split(llvm.Version, ".")[0]
 	commands["clang"] = []string{"clang-" + llvmMajor}
 	commands["ld.lld"] = []string{"ld.lld-" + llvmMajor, "ld.lld"}
 	commands["wasm-ld"] = []string{"wasm-ld-" + llvmMajor, "wasm-ld"}

builder/config.go

@@ -25,7 +25,7 @@ func NewConfig(options *compileopts.Options) (*compileopts.Config, error) {
 	}
 
 	// Version range supported by TinyGo.
-	const minorMin = 24 // when updating the min version, also update .github/workflows/compat.yml
+	const minorMin = 19
 	const minorMax = 26
 
 	// Check that we support this Go toolchain version.

builder/darwin-libsystem.go

@@ -15,7 +15,7 @@ func makeDarwinLibSystemJob(config *compileopts.Config, tmpdir string) *compileJ
 	return &compileJob{
 		description: "compile Darwin libSystem.dylib",
 		run: func(job *compileJob) (err error) {
-			arch, _, _ := strings.Cut(config.Triple(), "-")
+			arch := strings.Split(config.Triple(), "-")[0]
 			job.result = filepath.Join(tmpdir, "libSystem.dylib")
 			objpath := filepath.Join(tmpdir, "libSystem.o")
 			inpath := filepath.Join(goenv.Get("TINYGOROOT"), "lib/macos-minimal-sdk/src", arch, "libSystem.s")

builder/esp.go

@@ -100,24 +100,12 @@ func makeESPFirmwareImage(infile, outfile, format string) error {
 	chip_id := map[string]uint16{
 		"esp32":   0x0000,
 		"esp32c3": 0x0005,
-		"esp32c6": 0x000d,
 		"esp32s3": 0x0009,
 	}[chip]
 
-	// SPI flash speed/size byte (byte 3 of header):
-	//   Upper nibble = flash size, lower nibble = flash frequency.
-	//   The espflasher auto-detects and patches the flash size (upper nibble),
-	//   but the frequency (lower nibble) must be correct per chip.
-	spiSpeedSize := map[string]uint8{
-		"esp32":   0x1f, // 80MHz=0x0F, 2MB=0x10
-		"esp32c3": 0x1f, // 80MHz=0x0F, 2MB=0x10
-		"esp32c6": 0x10, // 80MHz=0x00, 2MB=0x10 (C6 uses different freq encoding)
-		"esp32s3": 0x1f, // 80MHz=0x0F, 2MB=0x10
-	}[chip]
-
 	// Image header.
 	switch chip {
-	case "esp32", "esp32c3", "esp32s3", "esp32c6":
+	case "esp32", "esp32c3", "esp32s3":
 		// Header format:
 		// https://github.com/espressif/esp-idf/blob/v4.3/components/bootloader_support/include/esp_app_format.h#L71
 		// Note: not adding a SHA256 hash as the binary is modified by
@@ -139,7 +127,7 @@ func makeESPFirmwareImage(infile, outfile, format string) error {
 			magic:          0xE9,
 			segment_count:  byte(len(segments)),
 			spi_mode:       2,    // ESP_IMAGE_SPI_MODE_DIO
-			spi_speed_size: spiSpeedSize,
+			spi_speed_size: 0x1f, // ESP_IMAGE_SPI_SPEED_80M, ESP_IMAGE_FLASH_SIZE_2MB
 			entry_addr:     uint32(inf.Entry),
 			wp_pin:         0xEE, // disable WP pin
 			chip_id:        chip_id,

builder/jobs.go

@@ -195,11 +195,11 @@ type intHeap struct {
 	sort.IntSlice
 }
 
-func (h *intHeap) Push(x any) {
+func (h *intHeap) Push(x interface{}) {
 	h.IntSlice = append(h.IntSlice, x.(int))
 }
 
-func (h *intHeap) Pop() any {
+func (h *intHeap) Pop() interface{} {
 	x := h.IntSlice[len(h.IntSlice)-1]
 	h.IntSlice = h.IntSlice[:len(h.IntSlice)-1]
 	return x

builder/library.go

@@ -218,7 +218,7 @@ func (l *Library) load(config *compileopts.Config, tmpdir string) (job *compileJ
 				return err
 			}
 			// Store this archive in the cache.
-			return robustRename(f.Name(), archiveFilePath)
+			return os.Rename(f.Name(), archiveFilePath)
 		},
 	}
 
@@ -232,6 +232,7 @@ func (l *Library) load(config *compileopts.Config, tmpdir string) (job *compileJ
 	}
 	for _, path := range paths {
 		// Strip leading "../" parts off the path.
+		path := path
 		cleanpath := path
 		for strings.HasPrefix(cleanpath, "../") {
 			cleanpath = cleanpath[3:]

builder/musl.go

@@ -28,8 +28,8 @@ func buildMuslAllTypes(arch, muslDir, outputBitsDir string) error {
 		if err != nil {
 			return err
 		}
-		lines := strings.SplitSeq(string(data), "\n")
+		lines := strings.Split(string(data), "\n")
-		for line := range lines {
+		for _, line := range lines {
 			if strings.HasPrefix(line, "TYPEDEF ") {
 				matches := regexp.MustCompile(`TYPEDEF (.*) ([^ ]*);`).FindStringSubmatch(line)
 				value := matches[1]

builder/robustio_other.go

@@ -1,9 +0,0 @@
-//go:build !windows
-
-package builder
-
-import "os"
-
-func robustRename(oldpath, newpath string) error {
-	return os.Rename(oldpath, newpath)
-}

builder/robustio_windows.go

@@ -1,44 +0,0 @@
-package builder
-
-import (
-	"errors"
-	"math/rand"
-	"os"
-	"syscall"
-	"time"
-)
-
-const robustRenameTimeout = 2 * time.Second
-
-func robustRename(oldpath, newpath string) error {
-	var bestErr error
-	start := time.Now()
-	nextSleep := time.Millisecond
-	for {
-		err := os.Rename(oldpath, newpath)
-		if err == nil || !isEphemeralRenameError(err) {
-			return err
-		}
-		if bestErr == nil {
-			bestErr = err
-		}
-		if d := time.Since(start) + nextSleep; d >= robustRenameTimeout {
-			return bestErr
-		}
-		time.Sleep(nextSleep)
-		nextSleep += time.Duration(rand.Int63n(int64(nextSleep)))
-	}
-}
-
-func isEphemeralRenameError(err error) bool {
-	var errno syscall.Errno
-	if errors.As(err, &errno) {
-		switch errno {
-		case syscall.Errno(2), // ERROR_FILE_NOT_FOUND
-			syscall.Errno(5),  // ERROR_ACCESS_DENIED
-			syscall.Errno(32): // ERROR_SHARING_VIOLATION
-			return true
-		}
-	}
-	return false
-}

builder/sizes.go

@@ -501,9 +501,8 @@ func loadProgramSize(path string, packagePathMap map[string]string) (*programSiz
 						Align:   section.Addralign,
 						Type:    memoryStack,
 					})
-				} else if section.Flags&elf.SHF_WRITE != 0 {
+				} else {
-					// Regular .bss section. Zero-initialized RAM is always
+					// Regular .bss section.
-					// writable, so require SHF_WRITE here.
 					sections = append(sections, memorySection{
 						Address: section.Addr,
 						Size:    section.Size,
@@ -511,11 +510,6 @@ func loadProgramSize(path string, packagePathMap map[string]string) (*programSiz
 						Type:    memoryBSS,
 					})
 				}
-				// Other (non-writable) SHT_NOBITS sections are address-space
-				// placeholders that occupy no RAM, such as the ESP linker
-				// script's .irom_dummy / .rodata_dummy sections which reserve
-				// the flash-mapped XIP virtual address ranges. They must not be
-				// counted as bss/RAM usage.
 			} else if section.Type == elf.SHT_PROGBITS && section.Flags&elf.SHF_EXECINSTR != 0 {
 				// .text
 				sections = append(sections, memorySection{

builder/sizes_test.go

@@ -42,15 +42,16 @@ 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", 3771, 309, 0, 2260},
+		{"hifive1b", "examples/echo", 3680, 280, 0, 2252},
-		{"microbit", "examples/serial", 2832, 368, 8, 2256},
+		{"microbit", "examples/serial", 2694, 342, 8, 2248},
-		{"wioterminal", "examples/pininterrupt", 8065, 1663, 132, 7488},
+		{"wioterminal", "examples/pininterrupt", 7074, 1510, 120, 7248},
 
 		// TODO: also check wasm. Right now this is difficult, because
 		// wasm binaries are run through wasm-opt and therefore the
 		// output varies by binaryen version.
 	}
 	for _, tc := range tests {
+		tc := tc
 		t.Run(tc.target+"/"+tc.path, func(t *testing.T) {
 			t.Parallel()
 
@@ -84,6 +85,7 @@ func TestSizeFull(t *testing.T) {
 	pkgMatch := regexp.MustCompile(`^[a-z/]+$`)    // example: "internal/task"
 
 	for _, target := range tests {
+		target := target
 		t.Run(target, func(t *testing.T) {
 			t.Parallel()
 
@@ -97,7 +99,7 @@ func TestSizeFull(t *testing.T) {
 				t.Fatal("could not read program size:", err)
 			}
 			for _, pkg := range sizes.sortedPackageNames() {
-				if pkg == "(padding)" || pkg == "(unknown)" || pkg == "Go types" {
+				if pkg == "(padding)" || pkg == "(unknown)" {
 					// TODO: correctly attribute all unknown binary size.
 					continue
 				}

builder/tools.go

@@ -116,16 +116,14 @@ func parseLLDErrors(text string) error {
 		// This can happen in some cases like with CGo and //go:linkname tricker.
 		if matches := regexp.MustCompile(`^ld.lld(-[0-9]+)?: error: undefined symbol: (.*)\n`).FindStringSubmatch(message); matches != nil {
 			symbolName := matches[2]
-			for line := range strings.SplitSeq(message, "\n") {
+			for _, line := range strings.Split(message, "\n") {
 				matches := regexp.MustCompile(`referenced by .* \(((.*):([0-9]+))\)`).FindStringSubmatch(line)
 				if matches != nil {
 					parsedError = true
 					line, _ := strconv.Atoi(matches[3])
+					// TODO: detect common mistakes like -gc=none?
 					msg := "linker could not find symbol " + symbolName
-					switch symbolName {
+					if symbolName == "runtime.alloc_noheap" {
-					case "runtime.alloc":
-						msg = "object allocated on the heap with -gc=none"
-					case "runtime.alloc_noheap":
 						msg = "object allocated on the heap in //go:noheap function"
 					}
 					linkErrors = append(linkErrors, scanner.Error{

builder/uf2.go

@@ -40,7 +40,7 @@ func convertBinToUF2(input []byte, targetAddr uint32, uf2FamilyID string) ([]byt
 	}
 	bl.SetNumBlocks(len(blocks))
 
-	for i := range blocks {
+	for i := 0; i < len(blocks); i++ {
 		bl.SetBlockNo(i)
 		bl.SetData(blocks[i])
 

cgo/cgo.go

@@ -26,6 +26,10 @@ import (
 	"golang.org/x/tools/go/ast/astutil"
 )
 
+// Function that's only defined in Go 1.22.
+var setASTFileFields = func(f *ast.File, start, end token.Pos) {
+}
+
 // cgoPackage holds all CGo-related information of a package.
 type cgoPackage struct {
 	generated       *ast.File
@@ -40,7 +44,7 @@ type cgoPackage struct {
 	tokenFiles      map[string]*token.File
 	definedGlobally map[string]ast.Node
 	noescapingFuncs map[string]*noescapingFunc // #cgo noescape lines
-	anonDecls       map[any]string
+	anonDecls       map[interface{}]string
 	cflags          []string // CFlags from #cgo lines
 	ldflags         []string // LDFlags from #cgo lines
 	visitedFiles    map[string][]byte
@@ -259,7 +263,7 @@ func Process(files []*ast.File, dir, importPath string, fset *token.FileSet, cfl
 		tokenFiles:      map[string]*token.File{},
 		definedGlobally: map[string]ast.Node{},
 		noescapingFuncs: map[string]*noescapingFunc{},
-		anonDecls:       map[any]string{},
+		anonDecls:       map[interface{}]string{},
 		visitedFiles:    map[string][]byte{},
 	}
 
@@ -302,7 +306,7 @@ func Process(files []*ast.File, dir, importPath string, fset *token.FileSet, cfl
 	// Find `import "C"` C fragments in the file.
 	p.cgoHeaders = make([]string, len(files)) // combined CGo header fragment for each file
 	for i, f := range files {
-		var cgoHeader strings.Builder
+		var cgoHeader string
 		for i := 0; i < len(f.Decls); i++ {
 			decl := f.Decls[i]
 			genDecl, ok := decl.(*ast.GenDecl)
@@ -337,8 +341,7 @@ func Process(files []*ast.File, dir, importPath string, fset *token.FileSet, cfl
 			// Iterate through all parts of the CGo header. Note that every //
 			// line is a new comment.
 			position := fset.Position(genDecl.Doc.Pos())
-			var fragment strings.Builder
+			fragment := fmt.Sprintf("# %d %#v\n", position.Line, position.Filename)
-			fragment.WriteString(fmt.Sprintf("# %d %#v\n", position.Line, position.Filename))
 			for _, comment := range genDecl.Doc.List {
 				// Find all #cgo lines, extract and use their contents, and
 				// replace the lines with spaces (to preserve locations).
@@ -355,13 +358,12 @@ func Process(files []*ast.File, dir, importPath string, fset *token.FileSet, cfl
 				} else { // comment
 					c = "  " + c[2:len(c)-2]
 				}
-				fragment.WriteString(c)
+				fragment += c + "\n"
-				fragment.WriteByte('\n')
 			}
-			cgoHeader.WriteString(fragment.String())
+			cgoHeader += fragment
 		}
 
-		p.cgoHeaders[i] = cgoHeader.String()
+		p.cgoHeaders[i] = cgoHeader
 	}
 
 	// Define CFlags that will be used while parsing the package.
@@ -652,6 +654,7 @@ func (p *cgoPackage) createUnionAccessor(field *ast.Field, typeName string) {
 		X: &ast.Ident{
 			NamePos: pos,
 			Name:    "union",
+			Obj:     nil,
 		},
 		Sel: &ast.Ident{
 			NamePos: pos,
@@ -705,6 +708,7 @@ func (p *cgoPackage) createUnionAccessor(field *ast.Field, typeName string) {
 						X: &ast.Ident{
 							NamePos: pos,
 							Name:    typeName,
+							Obj:     nil,
 						},
 					},
 				},
@@ -760,6 +764,7 @@ func (p *cgoPackage) createBitfieldGetter(bitfield bitfieldInfo, typeName string
 		X: &ast.Ident{
 			NamePos: bitfield.pos,
 			Name:    "s",
+			Obj:     nil,
 		},
 		Sel: &ast.Ident{
 			NamePos: bitfield.pos,
@@ -806,6 +811,11 @@ func (p *cgoPackage) createBitfieldGetter(bitfield bitfieldInfo, typeName string
 						{
 							NamePos: bitfield.pos,
 							Name:    "s",
+							Obj: &ast.Object{
+								Kind: ast.Var,
+								Name: "s",
+								Decl: nil,
+							},
 						},
 					},
 					Type: &ast.StarExpr{
@@ -813,6 +823,7 @@ func (p *cgoPackage) createBitfieldGetter(bitfield bitfieldInfo, typeName string
 						X: &ast.Ident{
 							NamePos: bitfield.pos,
 							Name:    typeName,
+							Obj:     nil,
 						},
 					},
 				},
@@ -870,6 +881,7 @@ func (p *cgoPackage) createBitfieldSetter(bitfield bitfieldInfo, typeName string
 		X: &ast.Ident{
 			NamePos: bitfield.pos,
 			Name:    "s",
+			Obj:     nil,
 		},
 		Sel: &ast.Ident{
 			NamePos: bitfield.pos,
@@ -952,6 +964,11 @@ func (p *cgoPackage) createBitfieldSetter(bitfield bitfieldInfo, typeName string
 						{
 							NamePos: bitfield.pos,
 							Name:    "s",
+							Obj: &ast.Object{
+								Kind: ast.Var,
+								Name: "s",
+								Decl: nil,
+							},
 						},
 					},
 					Type: &ast.StarExpr{
@@ -959,6 +976,7 @@ func (p *cgoPackage) createBitfieldSetter(bitfield bitfieldInfo, typeName string
 						X: &ast.Ident{
 							NamePos: bitfield.pos,
 							Name:    typeName,
+							Obj:     nil,
 						},
 					},
 				},
@@ -979,6 +997,7 @@ func (p *cgoPackage) createBitfieldSetter(bitfield bitfieldInfo, typeName string
 							{
 								NamePos: bitfield.pos,
 								Name:    "value",
+								Obj:     nil,
 							},
 						},
 						Type: bitfield.field.Type,
@@ -996,6 +1015,7 @@ func (p *cgoPackage) createBitfieldSetter(bitfield bitfieldInfo, typeName string
 							X: &ast.Ident{
 								NamePos: bitfield.pos,
 								Name:    "s",
+								Obj:     nil,
 							},
 							Sel: &ast.Ident{
 								NamePos: bitfield.pos,
@@ -1219,7 +1239,7 @@ func getPos(node ast.Node) token.Pos {
 // getUnnamedDeclName creates a name (with the given prefix) for the given C
 // declaration. This is used for structs, unions, and enums that are often
 // defined without a name and used in a typedef.
-func (p *cgoPackage) getUnnamedDeclName(prefix string, itf any) string {
+func (p *cgoPackage) getUnnamedDeclName(prefix string, itf interface{}) string {
 	if name, ok := p.anonDecls[itf]; ok {
 		return name
 	}

cgo/cgo_go122.go

@@ -0,0 +1,17 @@
+//go:build go1.22
+
+package cgo
+
+// Code specifically for Go 1.22.
+
+import (
+	"go/ast"
+	"go/token"
+)
+
+func init() {
+	setASTFileFields = func(f *ast.File, start, end token.Pos) {
+		f.FileStart = start
+		f.FileEnd = end
+	}
+}

cgo/cgo_test.go

@@ -45,6 +45,7 @@ func TestCGo(t *testing.T) {
 		"flags",
 		"const",
 	} {
+		name := name // avoid a race condition
 		t.Run(name, func(t *testing.T) {
 			// Read the AST in memory.
 			path := filepath.Join("testdata", name+".go")

cgo/libclang.go

@@ -160,7 +160,7 @@ func (f *cgoFile) readNames(fragment string, cflags []string, filename string, c
 			pos := f.getClangLocationPosition(location, unit)
 			f.addError(pos, severity+": "+spelling)
 		}
-		for i := range numDiagnostics {
+		for i := 0; i < numDiagnostics; i++ {
 			diagnostic := C.clang_getDiagnostic(unit, C.uint(i))
 			addDiagnostic(diagnostic)
 
@@ -217,6 +217,10 @@ func (f *cgoFile) createASTNode(name string, c clangCursor) (ast.Node, any) {
 	case C.CXCursor_FunctionDecl:
 		cursorType := C.tinygo_clang_getCursorType(c)
 		numArgs := int(C.tinygo_clang_Cursor_getNumArguments(c))
+		obj := &ast.Object{
+			Kind: ast.Fun,
+			Name: "_Cgo_" + name,
+		}
 		exportName := name
 		localName := name
 		var stringSignature string
@@ -254,6 +258,7 @@ func (f *cgoFile) createASTNode(name string, c clangCursor) (ast.Node, any) {
 			Name: &ast.Ident{
 				NamePos: pos,
 				Name:    "_Cgo_" + localName,
+				Obj:     obj,
 			},
 			Type: &ast.FuncType{
 				Func: pos,
@@ -278,7 +283,7 @@ func (f *cgoFile) createASTNode(name string, c clangCursor) (ast.Node, any) {
 				Text:  strings.Join(doc, "\n"),
 			})
 		}
-		for i := range numArgs {
+		for i := 0; i < numArgs; i++ {
 			arg := C.tinygo_clang_Cursor_getArgument(c, C.uint(i))
 			argName := getString(C.tinygo_clang_getCursorSpelling(arg))
 			argType := C.clang_getArgType(cursorType, C.uint(i))
@@ -290,6 +295,11 @@ func (f *cgoFile) createASTNode(name string, c clangCursor) (ast.Node, any) {
 					{
 						NamePos: pos,
 						Name:    argName,
+						Obj: &ast.Object{
+							Kind: ast.Var,
+							Name: argName,
+							Decl: decl,
+						},
 					},
 				},
 				Type: f.makeDecayingASTType(argType, pos),
@@ -305,6 +315,7 @@ func (f *cgoFile) createASTNode(name string, c clangCursor) (ast.Node, any) {
 				},
 			}
 		}
+		obj.Decl = decl
 		return decl, stringSignature
 	case C.CXCursor_StructDecl, C.CXCursor_UnionDecl:
 		typ := f.makeASTRecordType(c, pos)
@@ -314,27 +325,39 @@ func (f *cgoFile) createASTNode(name string, c clangCursor) (ast.Node, any) {
 			// Convert to a single-field struct type.
 			typeExpr = f.makeUnionField(typ)
 		}
+		obj := &ast.Object{
+			Kind: ast.Typ,
+			Name: typeName,
+		}
 		typeSpec := &ast.TypeSpec{
 			Name: &ast.Ident{
 				NamePos: typ.pos,
 				Name:    typeName,
+				Obj:     obj,
 			},
 			Type: typeExpr,
 		}
+		obj.Decl = typeSpec
 		return typeSpec, typ
 	case C.CXCursor_TypedefDecl:
 		typeName := "_Cgo_" + name
 		underlyingType := C.tinygo_clang_getTypedefDeclUnderlyingType(c)
+		obj := &ast.Object{
+			Kind: ast.Typ,
+			Name: typeName,
+		}
 		typeSpec := &ast.TypeSpec{
 			Name: &ast.Ident{
 				NamePos: pos,
 				Name:    typeName,
+				Obj:     obj,
 			},
 			Type: f.makeASTType(underlyingType, pos),
 		}
 		if underlyingType.kind != C.CXType_Enum {
 			typeSpec.Assign = pos
 		}
+		obj.Decl = typeSpec
 		return typeSpec, nil
 	case C.CXCursor_VarDecl:
 		cursorType := C.tinygo_clang_getCursorType(c)
@@ -353,13 +376,19 @@ func (f *cgoFile) createASTNode(name string, c clangCursor) (ast.Node, any) {
 				},
 			},
 		}
+		obj := &ast.Object{
+			Kind: ast.Var,
+			Name: "_Cgo_" + name,
+		}
 		valueSpec := &ast.ValueSpec{
 			Names: []*ast.Ident{{
 				NamePos: pos,
 				Name:    "_Cgo_" + name,
+				Obj:     obj,
 			}},
 			Type: typeExpr,
 		}
+		obj.Decl = valueSpec
 		gen.Specs = append(gen.Specs, valueSpec)
 		return gen, nil
 	case C.CXCursor_MacroDefinition:
@@ -376,16 +405,26 @@ func (f *cgoFile) createASTNode(name string, c clangCursor) (ast.Node, any) {
 			Lparen: token.NoPos,
 			Rparen: token.NoPos,
 		}
+		obj := &ast.Object{
+			Kind: ast.Con,
+			Name: "_Cgo_" + name,
+		}
 		valueSpec := &ast.ValueSpec{
 			Names: []*ast.Ident{{
 				NamePos: pos,
 				Name:    "_Cgo_" + name,
+				Obj:     obj,
 			}},
 			Values: []ast.Expr{expr},
 		}
+		obj.Decl = valueSpec
 		gen.Specs = append(gen.Specs, valueSpec)
 		return gen, nil
 	case C.CXCursor_EnumDecl:
+		obj := &ast.Object{
+			Kind: ast.Typ,
+			Name: "_Cgo_" + name,
+		}
 		underlying := C.tinygo_clang_getEnumDeclIntegerType(c)
 		// TODO: gc's CGo implementation uses types such as `uint32` for enums
 		// instead of types such as C.int, which are used here.
@@ -393,10 +432,12 @@ func (f *cgoFile) createASTNode(name string, c clangCursor) (ast.Node, any) {
 			Name: &ast.Ident{
 				NamePos: pos,
 				Name:    "_Cgo_" + name,
+				Obj:     obj,
 			},
 			Assign: pos,
 			Type:   f.makeASTType(underlying, pos),
 		}
+		obj.Decl = typeSpec
 		return typeSpec, nil
 	case C.CXCursor_EnumConstantDecl:
 		value := C.tinygo_clang_getEnumConstantDeclValue(c)
@@ -411,13 +452,19 @@ func (f *cgoFile) createASTNode(name string, c clangCursor) (ast.Node, any) {
 			Lparen: token.NoPos,
 			Rparen: token.NoPos,
 		}
+		obj := &ast.Object{
+			Kind: ast.Con,
+			Name: "_Cgo_" + name,
+		}
 		valueSpec := &ast.ValueSpec{
 			Names: []*ast.Ident{{
 				NamePos: pos,
 				Name:    "_Cgo_" + name,
+				Obj:     obj,
 			}},
 			Values: []ast.Expr{expr},
 		}
+		obj.Decl = valueSpec
 		gen.Specs = append(gen.Specs, valueSpec)
 		return gen, nil
 	default:
@@ -534,7 +581,7 @@ func tinygo_clang_globals_visitor(c, parent C.GoCXCursor, client_data C.CXClient
 
 // Get the precise location in the source code. Used for uniquely identifying
 // source locations.
-func (f *cgoFile) getUniqueLocationID(pos token.Pos, cursor C.GoCXCursor) any {
+func (f *cgoFile) getUniqueLocationID(pos token.Pos, cursor C.GoCXCursor) interface{} {
 	clangLocation := C.tinygo_clang_getCursorLocation(cursor)
 	var file C.CXFile
 	var line C.unsigned
@@ -592,8 +639,7 @@ func (p *cgoPackage) getClangLocationPosition(location C.CXSourceLocation, tu C.
 			Package: f.Pos(0),
 			Name:    ast.NewIdent(p.packageName),
 		}
-		astFile.FileStart = f.Pos(0)
+		setASTFileFields(astFile, f.Pos(0), f.Pos(int(size)))
-		astFile.FileEnd = f.Pos(int(size))
 		p.cgoFiles = append(p.cgoFiles, astFile)
 	}
 	positionFile := p.tokenFiles[filename]
@@ -910,16 +956,22 @@ func (p *cgoPackage) getIntegerType(name string, cursor clangCursor) *ast.TypeSp
 	}
 
 	// Construct an *ast.TypeSpec for this type.
+	obj := &ast.Object{
+		Kind: ast.Typ,
+		Name: name,
+	}
 	spec := &ast.TypeSpec{
 		Name: &ast.Ident{
 			NamePos: pos,
 			Name:    name,
+			Obj:     obj,
 		},
 		Type: &ast.Ident{
 			NamePos: pos,
 			Name:    goName,
 		},
 	}
+	obj.Decl = spec
 	return spec
 }
 
@@ -1052,6 +1104,7 @@ func tinygo_clang_struct_visitor(c, parent C.GoCXCursor, client_data C.CXClientD
 				pos:      prevField.Names[0].NamePos,
 			})
 			prevField.Names[0].Name = bitfieldName
+			prevField.Names[0].Obj.Name = bitfieldName
 		}
 		prevBitfield := &(*bitfieldList)[len(*bitfieldList)-1]
 		prevBitfield.endBit = bitfieldOffset
@@ -1068,6 +1121,11 @@ func tinygo_clang_struct_visitor(c, parent C.GoCXCursor, client_data C.CXClientD
 		{
 			NamePos: pos,
 			Name:    name,
+			Obj: &ast.Object{
+				Kind: ast.Var,
+				Name: name,
+				Decl: field,
+			},
 		},
 	}
 	fieldList.List = append(fieldList.List, field)

cgo/sync.go

@@ -12,17 +12,17 @@ import "C"
 // C. It is useful if an API uses function pointers and you cannot pass a Go
 // pointer but only a C pointer.
 type refMap struct {
-	refs map[unsafe.Pointer]any
+	refs map[unsafe.Pointer]interface{}
 	lock sync.Mutex
 }
 
 // Put stores a value in the map. It can later be retrieved using Get. It must
 // be removed using Remove to avoid memory leaks.
-func (m *refMap) Put(v any) unsafe.Pointer {
+func (m *refMap) Put(v interface{}) unsafe.Pointer {
 	m.lock.Lock()
 	defer m.lock.Unlock()
 	if m.refs == nil {
-		m.refs = make(map[unsafe.Pointer]any, 1)
+		m.refs = make(map[unsafe.Pointer]interface{}, 1)
 	}
 	ref := C.malloc(1)
 	m.refs[ref] = v
@@ -31,7 +31,7 @@ func (m *refMap) Put(v any) unsafe.Pointer {
 
 // Get returns a stored value previously inserted with Put. Use the same
 // reference as you got from Put.
-func (m *refMap) Get(ref unsafe.Pointer) any {
+func (m *refMap) Get(ref unsafe.Pointer) interface{} {
 	m.lock.Lock()
 	defer m.lock.Unlock()
 	return m.refs[ref]

compileopts/config.go

@@ -8,7 +8,6 @@ import (
 	"os"
 	"path/filepath"
 	"regexp"
-	"slices"
 	"strconv"
 	"strings"
 
@@ -141,7 +140,13 @@ func (c *Config) GC() string {
 func (c *Config) NeedsStackObjects() bool {
 	switch c.GC() {
 	case "conservative", "custom", "precise", "boehm":
-		return slices.Contains(c.BuildTags(), "tinygo.wasm")
+		for _, tag := range c.BuildTags() {
+			if tag == "tinygo.wasm" {
+				return true
+			}
+		}
+
+		return false
 	default:
 		return false
 	}
@@ -240,7 +245,7 @@ func (c *Config) RP2040BootPatch() bool {
 // Return a canonicalized architecture name, so we don't have to deal with arm*
 // vs thumb* vs arm64.
 func CanonicalArchName(triple string) string {
-	arch, _, _ := strings.Cut(triple, "-")
+	arch := strings.Split(triple, "-")[0]
 	if arch == "arm64" {
 		return "aarch64"
 	}
@@ -461,22 +466,6 @@ func (c *Config) LDFlags() []string {
 	return ldflags
 }
 
-// LinkerFlavor returns how the configured linker should be driven.
-// Usually this is derived from GOOS, but targets may override it explicitly.
-func (c *Config) LinkerFlavor() string {
-	if c.Target.LinkerFlavor != "" {
-		return c.Target.LinkerFlavor
-	}
-	switch c.GOOS() {
-	case "windows":
-		return "coff"
-	case "darwin":
-		return "darwin"
-	default:
-		return "gnu"
-	}
-}
-
 // ExtraFiles returns the list of extra files to be built and linked with the
 // executable. This can include extra C and assembly files.
 func (c *Config) ExtraFiles() []string {
@@ -550,7 +539,7 @@ func (c *Config) Programmer() (method, openocdInterface string) {
 	case "openocd", "msd", "command", "adb":
 		// The -programmer flag only specifies the flash method.
 		return c.Options.Programmer, c.Target.OpenOCDInterface
-	case "bmp", "probe-rs":
+	case "bmp":
 		// The -programmer flag only specifies the flash method.
 		return c.Options.Programmer, ""
 	default:

compileopts/options.go

@@ -3,7 +3,6 @@ package compileopts
 import (
 	"fmt"
 	"regexp"
-	"slices"
 	"strings"
 	"time"
 )
@@ -48,7 +47,6 @@ type Options struct {
 	Nobounds                bool
 	PrintSizes              string
 	PrintAllocs             *regexp.Regexp // regexp string
-	PrintAllocsCover        bool           // emit allocs in go coverage tool format
 	PrintStacks             bool
 	Tags                    []string
 	GlobalValues            map[string]map[string]string // map[pkgpath]map[varname]value
@@ -68,7 +66,7 @@ type Options struct {
 // Verify performs a validation on the given options, raising an error if options are not valid.
 func (o *Options) Verify() error {
 	if o.BuildMode != "" {
-		valid := slices.Contains(validBuildModeOptions, o.BuildMode)
+		valid := isInArray(validBuildModeOptions, o.BuildMode)
 		if !valid {
 			return fmt.Errorf(`invalid buildmode option '%s': valid values are %s`,
 				o.BuildMode,
@@ -76,7 +74,7 @@ func (o *Options) Verify() error {
 		}
 	}
 	if o.GC != "" {
-		valid := slices.Contains(validGCOptions, o.GC)
+		valid := isInArray(validGCOptions, o.GC)
 		if !valid {
 			return fmt.Errorf(`invalid gc option '%s': valid values are %s`,
 				o.GC,
@@ -85,7 +83,7 @@ func (o *Options) Verify() error {
 	}
 
 	if o.Scheduler != "" {
-		valid := slices.Contains(validSchedulerOptions, o.Scheduler)
+		valid := isInArray(validSchedulerOptions, o.Scheduler)
 		if !valid {
 			return fmt.Errorf(`invalid scheduler option '%s': valid values are %s`,
 				o.Scheduler,
@@ -94,7 +92,7 @@ func (o *Options) Verify() error {
 	}
 
 	if o.Serial != "" {
-		valid := slices.Contains(validSerialOptions, o.Serial)
+		valid := isInArray(validSerialOptions, o.Serial)
 		if !valid {
 			return fmt.Errorf(`invalid serial option '%s': valid values are %s`,
 				o.Serial,
@@ -103,7 +101,7 @@ func (o *Options) Verify() error {
 	}
 
 	if o.PrintSizes != "" {
-		valid := slices.Contains(validPrintSizeOptions, o.PrintSizes)
+		valid := isInArray(validPrintSizeOptions, o.PrintSizes)
 		if !valid {
 			return fmt.Errorf(`invalid size option '%s': valid values are %s`,
 				o.PrintSizes,
@@ -112,7 +110,7 @@ func (o *Options) Verify() error {
 	}
 
 	if o.PanicStrategy != "" {
-		valid := slices.Contains(validPanicStrategyOptions, o.PanicStrategy)
+		valid := isInArray(validPanicStrategyOptions, o.PanicStrategy)
 		if !valid {
 			return fmt.Errorf(`invalid panic option '%s': valid values are %s`,
 				o.PanicStrategy,
@@ -121,10 +119,19 @@ func (o *Options) Verify() error {
 	}
 
 	if o.Opt != "" {
-		if !slices.Contains(validOptOptions, o.Opt) {
+		if !isInArray(validOptOptions, o.Opt) {
 			return fmt.Errorf("invalid -opt=%s: valid values are %s", o.Opt, strings.Join(validOptOptions, ", "))
 		}
 	}
 
 	return nil
 }
+
+func isInArray(arr []string, item string) bool {
+	for _, i := range arr {
+		if i == item {
+			return true
+		}
+	}
+	return false
+}

compileopts/target.go

@@ -38,7 +38,6 @@ type TargetSpec struct {
 	Scheduler        string   `json:"scheduler,omitempty"`
 	Serial           string   `json:"serial,omitempty"` // which serial output to use (uart, usb, none)
 	Linker           string   `json:"linker,omitempty"`
-	LinkerFlavor     string   `json:"linker-flavor,omitempty"` // how to drive the configured linker (for example: gnu, coff, darwin)
 	RTLib            string   `json:"rtlib,omitempty"` // compiler runtime library (libgcc, compiler-rt)
 	Libc             string   `json:"libc,omitempty"`
 	AutoStackSize    *bool    `json:"automatic-stack-size,omitempty"` // Determine stack size automatically at compile time.
@@ -68,7 +67,6 @@ type TargetSpec struct {
 	ADBPreCommands   []string `json:"adb-pre-commands,omitempty"`
 	ADBPushRemote    string   `json:"adb-push-remote,omitempty"`
 	ADBPostCommands  []string `json:"adb-post-commands,omitempty"`
-	ProbeRSChip      string   `json:"probe-rs-chip,omitempty"`
 	CodeModel        string   `json:"code-model,omitempty"`
 	RelocationModel  string   `json:"relocation-model,omitempty"`
 	WITPackage       string   `json:"wit-package,omitempty"`
@@ -486,8 +484,6 @@ func defaultTarget(options *Options) (*TargetSpec, error) {
 			"--no-insert-timestamp",
 			"--no-dynamicbase",
 		)
-		spec.ExtraFiles = append(spec.ExtraFiles,
-			"src/runtime/runtime_windows.c")
 	case "wasm", "wasip1", "wasip2":
 		return nil, fmt.Errorf("GOOS=%s but GOARCH is unset. Please set GOARCH to wasm", options.GOOS)
 	default:

compileopts/target_test.go

@@ -112,52 +112,3 @@ func TestOverrideProperties(t *testing.T) {
 	}
 
 }
-
-func TestConfigLinkerFlavor(t *testing.T) {
-	tests := []struct {
-		name   string
-		target *TargetSpec
-		goos   string
-		want   string
-	}{
-		{
-			name:   "default gnu",
-			target: &TargetSpec{},
-			goos:   "linux",
-			want:   "gnu",
-		},
-		{
-			name:   "default coff",
-			target: &TargetSpec{},
-			goos:   "windows",
-			want:   "coff",
-		},
-		{
-			name:   "default darwin",
-			target: &TargetSpec{},
-			goos:   "darwin",
-			want:   "darwin",
-		},
-		{
-			name: "target override",
-			target: &TargetSpec{
-				LinkerFlavor: "coff",
-			},
-			goos: "linux",
-			want: "coff",
-		},
-	}
-
-	for _, tc := range tests {
-		t.Run(tc.name, func(t *testing.T) {
-			tc.target.GOOS = tc.goos
-			config := &Config{
-				Options: &Options{},
-				Target:  tc.target,
-			}
-			if got := config.LinkerFlavor(); got != tc.want {
-				t.Fatalf("LinkerFlavor() = %q, want %q", got, tc.want)
-			}
-		})
-	}
-}

compiler/asserts.go

@@ -241,35 +241,22 @@ func (b *builder) createRuntimeAssert(assert llvm.Value, blockPrefix, assertFunc
 		}
 	}
 
-	faultBlock := b.getRuntimeAssertBlock(blockPrefix, assertFunc)
+	// Put the fault block at the end of the function and the next block at the
+	// current insert position.
+	faultBlock := b.ctx.AddBasicBlock(b.llvmFn, blockPrefix+".throw")
 	nextBlock := b.insertBasicBlock(blockPrefix + ".next")
 	b.currentBlockInfo.exit = nextBlock // adjust outgoing block for phi nodes
 
 	// Now branch to the out-of-bounds or the regular block.
 	b.CreateCondBr(assert, faultBlock, nextBlock)
 
-	// Ok: assert didn't trigger so continue normally.
+	// Fail: the assert triggered so panic.
-	b.SetInsertPointAtEnd(nextBlock)
+	b.SetInsertPointAtEnd(faultBlock)
-}
-
-func (b *builder) getRuntimeAssertBlock(blockPrefix, assertFunc string) llvm.BasicBlock {
-	if b.runtimeAssertBlocks == nil {
-		b.runtimeAssertBlocks = make(map[string]llvm.BasicBlock)
-	}
-	if block := b.runtimeAssertBlocks[assertFunc]; !block.IsNil() {
-		return block
-	}
-	savedBlock := b.GetInsertBlock()
-	block := b.ctx.AddBasicBlock(b.llvmFn, blockPrefix+".throw")
-	b.runtimeAssertBlocks[assertFunc] = block
-	b.SetInsertPointAtEnd(block)
-	if b.hasDeferFrame() {
-		b.createFaultCheckpoint()
-	}
 	b.createRuntimeCall(assertFunc, nil, "")
 	b.CreateUnreachable()
-	b.SetInsertPointAtEnd(savedBlock)
+
-	return block
+	// Ok: assert didn't trigger so continue normally.
+	b.SetInsertPointAtEnd(nextBlock)
 }
 
 // extendInteger extends the value to at least targetType using a zero or sign

compiler/channel.go

@@ -48,7 +48,7 @@ func (b *builder) createChanSend(instr *ssa.Send) {
 	channelOpAlloca, channelOpAllocaSize := b.createTemporaryAlloca(channelOp, "chan.op")
 
 	// Do the send.
-	b.createRuntimeInvoke("chanSend", []llvm.Value{ch, valueAlloca, channelOpAlloca}, "")
+	b.createRuntimeCall("chanSend", []llvm.Value{ch, valueAlloca, channelOpAlloca}, "")
 
 	// End the lifetime of the allocas.
 	// This also works around a bug in CoroSplit, at least in LLVM 8:
@@ -101,7 +101,7 @@ func (b *builder) createChanRecv(unop *ssa.UnOp) llvm.Value {
 
 // createChanClose closes the given channel.
 func (b *builder) createChanClose(ch llvm.Value) {
-	b.createRuntimeInvoke("chanClose", []llvm.Value{ch}, "")
+	b.createRuntimeCall("chanClose", []llvm.Value{ch}, "")
 }
 
 // createSelect emits all IR necessary for a select statements. That's a

compiler/compiler.go

@@ -90,10 +90,8 @@ type compilerContext struct {
 	astComments      map[string]*ast.CommentGroup
 	embedGlobals     map[string][]*loader.EmbedFile
 	pkg              *types.Package
-	loaderPkg        *loader.Package // current package being compiled (for AST access)
 	packageDir       string // directory for this package
 	runtimePkg       *types.Package
-	localTypeNames   typeutil.Map // *types.Named (synthetic local from generic instantiation) -> string
 }
 
 // newCompilerContext returns a new compiler context ready for use, most
@@ -169,7 +167,7 @@ type builder struct {
 	dilocals          map[*types.Var]llvm.Metadata
 	initInlinedAt     llvm.Metadata            // fake inlinedAt position
 	initPseudoFuncs   map[string]llvm.Metadata // fake "inlined" functions for proper init debug locations
-	allDeferFuncs     []any
+	allDeferFuncs     []interface{}
 	deferFuncs        map[*ssa.Function]int
 	deferInvokeFuncs  map[string]int
 	deferClosureFuncs map[*ssa.Function]int
@@ -178,9 +176,6 @@ type builder struct {
 	deferBuiltinFuncs map[ssa.Value]deferBuiltin
 	runDefersBlock    []llvm.BasicBlock
 	afterDefersBlock  []llvm.BasicBlock
-
-	runtimeAssertBlocks  map[string]llvm.BasicBlock
-	interfaceAssertBlock llvm.BasicBlock
 }
 
 func newBuilder(c *compilerContext, irbuilder llvm.Builder, f *ssa.Function) *builder {
@@ -197,6 +192,16 @@ func newBuilder(c *compilerContext, irbuilder llvm.Builder, f *ssa.Function) *bu
 	}
 }
 
+// Return the runtime.alloc function variant.
+// This is normally just "alloc", but is "alloc_noheap" if the //go:noheap
+// pragma is used.
+func (b *builder) allocFunc() string {
+	if b.info.noheap {
+		return "alloc_noheap"
+	}
+	return "alloc"
+}
+
 type blockInfo struct {
 	// entry is the LLVM basic block corresponding to the start of this *ssa.Block.
 	entry llvm.BasicBlock
@@ -299,18 +304,12 @@ func CompilePackage(moduleName string, pkg *loader.Package, ssaPkg *ssa.Package,
 	c.packageDir = pkg.OriginalDir()
 	c.embedGlobals = pkg.EmbedGlobals
 	c.pkg = pkg.Pkg
-	c.loaderPkg = pkg
 	c.runtimePkg = ssaPkg.Prog.ImportedPackage("runtime").Pkg
 	c.program = ssaPkg.Prog
 
 	// Convert AST to SSA.
 	ssaPkg.Build()
 
-	// Assign names to function-local named types before compiling the
-	// package, so that types declared in different functions (or in
-	// different instantiations of a generic function) do not collide.
-	c.scanLocalTypes(ssaPkg)
-
 	// Initialize debug information.
 	if c.Debug {
 		c.cu = c.dibuilder.CreateCompileUnit(llvm.DICompileUnit{
@@ -870,9 +869,10 @@ func (c *compilerContext) createPackage(irbuilder llvm.Builder, pkg *ssa.Package
 			}
 			// Create the function definition.
 			b := newBuilder(c, irbuilder, member)
-			if ok := b.defineMathOp(); ok {
+			if _, ok := mathToLLVMMapping[member.RelString(nil)]; ok {
 				// The body of this function (if there is one) is ignored and
 				// replaced with a LLVM intrinsic call.
+				b.defineMathOp()
 				continue
 			}
 			if ok := b.defineMathBitsIntrinsic(); ok {
@@ -1895,12 +1895,6 @@ func (b *builder) createBuiltin(argTypes []types.Type, argValues []llvm.Value, c
 			// not of the current function.
 			useParentFrame = 1
 		}
-		// Prevent inlining of functions that call recover(), matching the
-		// Go compiler's behavior. If this function were inlined into a
-		// deferred function, recover() would incorrectly succeed because
-		// the inlined code runs in the deferred function's context.
-		noinline := b.ctx.CreateEnumAttribute(llvm.AttributeKindID("noinline"), 0)
-		b.llvmFn.AddFunctionAttr(noinline)
 		return b.createRuntimeCall("_recover", []llvm.Value{llvm.ConstInt(b.ctx.Int1Type(), useParentFrame, false)}, ""), nil
 	case "ssa:wrapnilchk":
 		// TODO: do an actual nil check?
@@ -2156,10 +2150,13 @@ func (c *compilerContext) maxSliceSize(elementType llvm.Type) uint64 {
 	if elementSize == 0 {
 		elementSize = 1
 	}
-	maxSize := min(
+	maxSize := maxPointerValue / elementSize
+
 	// len(slice) is an int. Make sure the length remains small enough to fit in
 	// an int.
-		maxPointerValue/elementSize, maxIntegerValue)
+	if maxSize > maxIntegerValue {
+		maxSize = maxIntegerValue
+	}
 
 	return maxSize
 }
@@ -2186,8 +2183,9 @@ func (b *builder) createExpr(expr ssa.Value) (llvm.Value, error) {
 			}
 			sizeValue := llvm.ConstInt(b.uintptrType, size, false)
 			layoutValue := b.createObjectLayout(typ, expr.Pos())
+			buf := b.createRuntimeCall(b.allocFunc(), []llvm.Value{sizeValue, layoutValue}, expr.Comment)
 			align := b.targetData.ABITypeAlignment(typ)
-			buf := b.createAlloc(sizeValue, layoutValue, align, expr.Comment)
+			buf.AddCallSiteAttribute(0, b.ctx.CreateEnumAttribute(llvm.AttributeKindID("align"), uint64(align)))
 			return buf, nil
 		} else {
 			buf := llvmutil.CreateEntryBlockAlloca(b.Builder, typ, expr.Comment)
@@ -2417,7 +2415,7 @@ func (b *builder) createExpr(expr ssa.Value) (llvm.Value, error) {
 		}
 		sliceSize := b.CreateBinOp(llvm.Mul, elemSizeValue, sliceCapCast, "makeslice.cap")
 		layoutValue := b.createObjectLayout(llvmElemType, expr.Pos())
-		slicePtr := b.createAlloc(sliceSize, layoutValue, 0, "makeslice.buf")
+		slicePtr := b.createRuntimeCall(b.allocFunc(), []llvm.Value{sliceSize, layoutValue}, "makeslice.buf")
 		slicePtr.AddCallSiteAttribute(0, b.ctx.CreateEnumAttribute(llvm.AttributeKindID("align"), uint64(elemAlign)))
 
 		// Extend or truncate if necessary. This is safe as we've already done

compiler/compiler_test.go

@@ -188,9 +188,9 @@ func TestCompilerErrors(t *testing.T) {
 		t.Error(err)
 	}
 	errorsFileString := strings.ReplaceAll(string(errorsFile), "\r\n", "\n")
-	for line := range strings.SplitSeq(errorsFileString, "\n") {
+	for _, line := range strings.Split(errorsFileString, "\n") {
-		if after, ok := strings.CutPrefix(line, "// ERROR: "); ok {
+		if strings.HasPrefix(line, "// ERROR: ") {
-			expectedErrors = append(expectedErrors, after)
+			expectedErrors = append(expectedErrors, strings.TrimPrefix(line, "// ERROR: "))
 		}
 	}
 

compiler/defer.go

@@ -60,6 +60,10 @@ func (b *builder) deferInitFunc() {
 	b.deferExprFuncs = make(map[ssa.Value]int)
 	b.deferBuiltinFuncs = make(map[ssa.Value]deferBuiltin)
 
+	// Create defer list pointer.
+	b.deferPtr = b.CreateAlloca(b.dataPtrType, "deferPtr")
+	b.CreateStore(llvm.ConstPointerNull(b.dataPtrType), b.deferPtr)
+
 	if b.hasDeferFrame() {
 		// Set up the defer frame with the current stack pointer.
 		// This assumes that the stack pointer doesn't move outside of the
@@ -69,22 +73,12 @@ func (b *builder) deferInitFunc() {
 		// in the setjmp-like inline assembly.
 		deferFrameType := b.getLLVMRuntimeType("deferFrame")
 		b.deferFrame = b.CreateAlloca(deferFrameType, "deferframe.buf")
-		// The field index must match the DeferPtr field in runtime.deferFrame,
-		// defined in src/runtime/panic.go.
-		b.deferPtr = b.CreateInBoundsGEP(deferFrameType, b.deferFrame, []llvm.Value{
-			llvm.ConstInt(b.ctx.Int32Type(), 0, false),
-			llvm.ConstInt(b.ctx.Int32Type(), 6, false), // DeferPtr field
-		}, "deferPtr")
 		stackPointer := b.readStackPointer()
 		b.createRuntimeCall("setupDeferFrame", []llvm.Value{b.deferFrame, stackPointer}, "")
 
 		// Create the landing pad block, which is where control transfers after
 		// a panic.
 		b.landingpad = b.ctx.AddBasicBlock(b.llvmFn, "lpad")
-	} else {
-		// Create defer list pointer.
-		b.deferPtr = b.CreateAlloca(b.dataPtrType, "deferPtr")
-		b.CreateStore(llvm.ConstPointerNull(b.dataPtrType), b.deferPtr)
 	}
 }
 
@@ -116,8 +110,8 @@ func (b *builder) createLandingPad() {
 func (b *builder) createCheckpoint(ptr llvm.Value) llvm.Value {
 	// Construct inline assembly equivalents of setjmp.
 	// The assembly works as follows:
-	//   * Registers are either clobbered or, on 386, saved for longjmp to
+	//   * All registers (both callee-saved and caller saved) are clobbered
-	//     restore if the ABI requires them to survive calls.
+	//     after the inline assembly returns.
 	//   * The assembly stores the address just past the end of the assembly
 	//     into the jump buffer.
 	//   * The return value (eax, rax, r0, etc) is set to zero in the inline
@@ -130,12 +124,8 @@ func (b *builder) createCheckpoint(ptr llvm.Value) llvm.Value {
 		asmString = `
 xorl %eax, %eax
 movl $$1f, 4(%ebx)
-movl %ebx, 8(%ebx)
-movl %esi, 12(%ebx)
-movl %edi, 16(%ebx)
-movl %ebp, 20(%ebx)
 1:`
-		constraints = "={eax},{ebx},~{ecx},~{edx},~{xmm0},~{xmm1},~{xmm2},~{xmm3},~{xmm4},~{xmm5},~{xmm6},~{xmm7},~{fpsr},~{fpcr},~{flags},~{dirflag},~{memory}"
+		constraints = "={eax},{ebx},~{ebx},~{ecx},~{edx},~{esi},~{edi},~{ebp},~{xmm0},~{xmm1},~{xmm2},~{xmm3},~{xmm4},~{xmm5},~{xmm6},~{xmm7},~{fpsr},~{fpcr},~{flags},~{dirflag},~{memory}"
 		// This doesn't include the floating point stack because TinyGo uses
 		// newer floating point instructions.
 	case "x86_64":
@@ -247,17 +237,6 @@ func (b *builder) createInvokeCheckpoint() {
 	b.currentBlockInfo.exit = continueBB
 }
 
-// createFaultCheckpoint is like createInvokeCheckpoint but for use in fault
-// blocks (e.g., bounds check failures). Unlike createInvokeCheckpoint, it does
-// not update currentBlockInfo.exit because the fault block is a dead-end that
-// does not participate in phi node resolution.
-func (b *builder) createFaultCheckpoint() {
-	isZero := b.createCheckpoint(b.deferFrame)
-	continueBB := b.insertBasicBlock("")
-	b.CreateCondBr(isZero, continueBB, b.landingpad)
-	b.SetInsertPointAtEnd(continueBB)
-}
-
 // isInLoop checks if there is a path from the current block to itself.
 // Use Tarjan's strongly connected components algorithm to search for cycles.
 // A one-node SCC is a cycle iff there is an edge from the node to itself.
@@ -509,7 +488,7 @@ func (b *builder) createDefer(instr *ssa.Defer) {
 		size := b.targetData.TypeAllocSize(deferredCallType)
 		sizeValue := llvm.ConstInt(b.uintptrType, size, false)
 		nilPtr := llvm.ConstNull(b.dataPtrType)
-		alloca = b.createAlloc(sizeValue, nilPtr, 0, "defer.alloc.call")
+		alloca = b.createRuntimeCall(b.allocFunc(), []llvm.Value{sizeValue, nilPtr}, "defer.alloc.call")
 	}
 	if b.NeedsStackObjects {
 		b.trackPointer(alloca)
@@ -673,8 +652,8 @@ func (b *builder) createRunDefers() {
 			fn := callback.Fn.(*ssa.Function)
 			valueTypes := []llvm.Type{b.uintptrType, b.dataPtrType}
 			params := fn.Signature.Params()
-			for v := range params.Variables() {
+			for i := 0; i < params.Len(); i++ {
-				valueTypes = append(valueTypes, b.getLLVMType(v.Type()))
+				valueTypes = append(valueTypes, b.getLLVMType(params.At(i).Type()))
 			}
 			valueTypes = append(valueTypes, b.dataPtrType) // closure
 			deferredCallType := b.ctx.StructType(valueTypes, false)
@@ -699,8 +678,8 @@ func (b *builder) createRunDefers() {
 
 			//Get signature from call results
 			params := callback.Type().Underlying().(*types.Signature).Params()
-			for v := range params.Variables() {
+			for i := 0; i < params.Len(); i++ {
-				valueTypes = append(valueTypes, b.getLLVMType(v.Type()))
+				valueTypes = append(valueTypes, b.getLLVMType(params.At(i).Type()))
 			}
 
 			deferredCallType := b.ctx.StructType(valueTypes, false)

compiler/func.go

@@ -81,8 +81,8 @@ func (c *compilerContext) getLLVMFunctionType(typ *types.Signature) llvm.Type {
 			paramTypes = append(paramTypes, info.llvmType)
 		}
 	}
-	for v := range typ.Params().Variables() {
+	for i := 0; i < typ.Params().Len(); i++ {
-		subType := c.getLLVMType(v.Type())
+		subType := c.getLLVMType(typ.Params().At(i).Type())
 		for _, info := range c.expandFormalParamType(subType, "", nil) {
 			paramTypes = append(paramTypes, info.llvmType)
 		}

compiler/gc.go

@@ -5,38 +5,11 @@ package compiler
 
 import (
 	"go/token"
-	"slices"
 
 	"golang.org/x/tools/go/ssa"
 	"tinygo.org/x/go-llvm"
 )
 
-// Heap-allocate a buffer of the given size. This will typically call
-// runtime.alloc.
-func (b *builder) createAlloc(sizeValue, layoutValue llvm.Value, align int, comment string) llvm.Value {
-	// Normally allocate using "runtime.alloc", but use "runtime.alloc_noheap"
-	// if the //go:noheap pragma is used.
-	allocFunc := "alloc"
-	if b.info.noheap {
-		allocFunc = "alloc_noheap"
-	}
-
-	// Allocs that don't allocate anything can return an architecture-specific
-	// sentinel value.
-	if !sizeValue.IsAConstantInt().IsNil() && sizeValue.ZExtValue() == 0 {
-		allocFunc = "alloc_zero"
-	}
-
-	// Make the runtime call.
-	call := b.createRuntimeCall(allocFunc, []llvm.Value{sizeValue, layoutValue}, comment)
-	if align != 0 {
-		// TODO: make sure all callsites set the correct alignment.
-		call.AddCallSiteAttribute(0, b.ctx.CreateEnumAttribute(llvm.AttributeKindID("align"), uint64(align)))
-	}
-
-	return call
-}
-
 // trackExpr inserts pointer tracking intrinsics for the GC if the expression is
 // one of the expressions that need this.
 func (b *builder) trackExpr(expr ssa.Value, value llvm.Value) {
@@ -89,7 +62,7 @@ func (b *builder) trackValue(value llvm.Value) {
 			return
 		}
 		numElements := typ.StructElementTypesCount()
-		for i := range numElements {
+		for i := 0; i < numElements; i++ {
 			subValue := b.CreateExtractValue(value, i, "")
 			b.trackValue(subValue)
 		}
@@ -98,7 +71,7 @@ func (b *builder) trackValue(value llvm.Value) {
 			return
 		}
 		numElements := typ.ArrayLength()
-		for i := range numElements {
+		for i := 0; i < numElements; i++ {
 			subValue := b.CreateExtractValue(value, i, "")
 			b.trackValue(subValue)
 		}
@@ -119,7 +92,12 @@ func typeHasPointers(t llvm.Type) bool {
 	case llvm.PointerTypeKind:
 		return true
 	case llvm.StructTypeKind:
-		return slices.ContainsFunc(t.StructElementTypes(), typeHasPointers)
+		for _, subType := range t.StructElementTypes() {
+			if typeHasPointers(subType) {
+				return true
+			}
+		}
+		return false
 	case llvm.ArrayTypeKind:
 		if t.ArrayLength() == 0 {
 			return false

compiler/goroutine.go

@@ -97,7 +97,7 @@ func (b *builder) createGo(instr *ssa.Go) {
 		funcType = b.getLLVMFunctionType(instr.Call.Value.Type().Underlying().(*types.Signature))
 		params = append(params, context, funcPtr)
 		hasContext = true
-		prefix = b.getFunctionInfo(b.fn).linkName
+		prefix = b.fn.RelString(nil)
 	}
 
 	paramBundle := b.emitPointerPack(params)
@@ -139,7 +139,7 @@ func (b *builder) createWasmExport() {
 	// Declare the exported function.
 	paramTypes := b.llvmFnType.ParamTypes()
 	exportedFnType := llvm.FunctionType(b.llvmFnType.ReturnType(), paramTypes[:len(paramTypes)-1], false)
-	exportedFn := llvm.AddFunction(b.mod, b.getFunctionInfo(b.fn).linkName+suffix, exportedFnType)
+	exportedFn := llvm.AddFunction(b.mod, b.fn.RelString(nil)+suffix, exportedFnType)
 	b.addStandardAttributes(exportedFn)
 	llvmutil.AppendToGlobal(b.mod, "llvm.used", exportedFn)
 	exportedFn.AddFunctionAttr(b.ctx.CreateStringAttribute("wasm-export-name", b.info.wasmExport))
@@ -414,7 +414,7 @@ func (c *compilerContext) createGoroutineStartWrapper(fnType llvm.Type, fn llvm.
 			// Extract parameters from the state object, and call the function
 			// that's being wrapped.
 			var callParams []llvm.Value
-			for i := range numParams {
+			for i := 0; i < numParams; i++ {
 				gep := b.CreateInBoundsGEP(stateStruct, statePtr, []llvm.Value{
 					llvm.ConstInt(b.ctx.Int32Type(), 0, false),
 					llvm.ConstInt(b.ctx.Int32Type(), uint64(i), false),

compiler/inlineasm.go

@@ -146,14 +146,13 @@ func (b *builder) emitSVCall(args []ssa.Value, pos token.Pos) (llvm.Value, error
 	llvmArgs := []llvm.Value{}
 	argTypes := []llvm.Type{}
 	asm := "svc #" + strconv.FormatUint(num, 10)
-	var constraints strings.Builder
+	constraints := "={r0}"
-	constraints.WriteString("={r0}")
 	for i, arg := range args[1:] {
 		arg = arg.(*ssa.MakeInterface).X
 		if i == 0 {
-			constraints.WriteString(",0")
+			constraints += ",0"
 		} else {
-			constraints.WriteString(",{r" + strconv.Itoa(i) + "}")
+			constraints += ",{r" + strconv.Itoa(i) + "}"
 		}
 		llvmValue := b.getValue(arg, pos)
 		llvmArgs = append(llvmArgs, llvmValue)
@@ -162,9 +161,9 @@ func (b *builder) emitSVCall(args []ssa.Value, pos token.Pos) (llvm.Value, error
 	// Implement the ARM calling convention by marking r1-r3 as
 	// clobbered. r0 is used as an output register so doesn't have to be
 	// marked as clobbered.
-	constraints.WriteString(",~{r1},~{r2},~{r3}")
+	constraints += ",~{r1},~{r2},~{r3}"
 	fnType := llvm.FunctionType(b.uintptrType, argTypes, false)
-	target := llvm.InlineAsm(fnType, asm, constraints.String(), true, false, 0, false)
+	target := llvm.InlineAsm(fnType, asm, constraints, true, false, 0, false)
 	return b.CreateCall(fnType, target, llvmArgs, ""), nil
 }
 
@@ -185,14 +184,13 @@ func (b *builder) emitSV64Call(args []ssa.Value, pos token.Pos) (llvm.Value, err
 	llvmArgs := []llvm.Value{}
 	argTypes := []llvm.Type{}
 	asm := "svc #" + strconv.FormatUint(num, 10)
-	var constraints strings.Builder
+	constraints := "={x0}"
-	constraints.WriteString("={x0}")
 	for i, arg := range args[1:] {
 		arg = arg.(*ssa.MakeInterface).X
 		if i == 0 {
-			constraints.WriteString(",0")
+			constraints += ",0"
 		} else {
-			constraints.WriteString(",{x" + strconv.Itoa(i) + "}")
+			constraints += ",{x" + strconv.Itoa(i) + "}"
 		}
 		llvmValue := b.getValue(arg, pos)
 		llvmArgs = append(llvmArgs, llvmValue)
@@ -201,9 +199,9 @@ func (b *builder) emitSV64Call(args []ssa.Value, pos token.Pos) (llvm.Value, err
 	// Implement the ARM64 calling convention by marking x1-x7 as
 	// clobbered. x0 is used as an output register so doesn't have to be
 	// marked as clobbered.
-	constraints.WriteString(",~{x1},~{x2},~{x3},~{x4},~{x5},~{x6},~{x7}")
+	constraints += ",~{x1},~{x2},~{x3},~{x4},~{x5},~{x6},~{x7}"
 	fnType := llvm.FunctionType(b.uintptrType, argTypes, false)
-	target := llvm.InlineAsm(fnType, asm, constraints.String(), true, false, 0, false)
+	target := llvm.InlineAsm(fnType, asm, constraints, true, false, 0, false)
 	return b.CreateCall(fnType, target, llvmArgs, ""), nil
 }
 

compiler/interface.go

@@ -10,7 +10,6 @@ import (
 	"fmt"
 	"go/token"
 	"go/types"
-	"path/filepath"
 	"sort"
 	"strconv"
 	"strings"
@@ -145,8 +144,8 @@ func (c *compilerContext) getTypeCode(typ types.Type) llvm.Value {
 	// For a non-interface type, it returns the number of exported methods.
 	// For an interface type, it returns the number of exported and unexported methods.
 	var numMethods int
-	for method := range ms.Methods() {
+	for i := 0; i < ms.Len(); i++ {
-		if isInterface || method.Obj().Exported() {
+		if isInterface || ms.At(i).Obj().Exported() {
 			numMethods++
 		}
 	}
@@ -166,7 +165,7 @@ func (c *compilerContext) getTypeCode(typ types.Type) llvm.Value {
 		}
 	}
 
-	typeCodeName, isLocal := c.getTypeCodeName(typ)
+	typeCodeName, isLocal := getTypeCodeName(typ)
 	globalName := "reflect/types.type:" + typeCodeName
 	var global llvm.Value
 	if isLocal {
@@ -193,8 +192,8 @@ func (c *compilerContext) getTypeCode(typ types.Type) llvm.Value {
 		}
 		// Compute the method set value for types that support methods.
 		var methods []*types.Func
-		for method := range ms.Methods() {
+		for i := 0; i < ms.Len(); i++ {
-			methods = append(methods, method.Obj().(*types.Func))
+			methods = append(methods, ms.At(i).Obj().(*types.Func))
 		}
 		methodSetType := types.NewStruct([]*types.Var{
 			types.NewVar(token.NoPos, nil, "length", types.Typ[types.Uintptr]),
@@ -490,7 +489,10 @@ func (c *compilerContext) getTypeCode(typ types.Type) llvm.Value {
 				c.getTypeMethodSet(typ),
 			}, typeFields...)
 		}
-		alignment := max(c.targetData.TypeAllocSize(c.dataPtrType), 4)
+		alignment := c.targetData.TypeAllocSize(c.dataPtrType)
+		if alignment < 4 {
+			alignment = 4
+		}
 		globalValue := c.ctx.ConstStruct(typeFields, false)
 		global.SetInitializer(globalValue)
 		if isLocal {
@@ -578,50 +580,20 @@ var basicTypeNames = [...]string{
 // getTypeCodeName returns a name for this type that can be used in the
 // interface lowering pass to assign type codes as expected by the reflect
 // package. See getTypeCodeNum.
-//
+func getTypeCodeName(t types.Type) (string, bool) {
-// isLocal is true when the type is declared inside a function body.
-// Such types need a per-declaration (or per instantiation) suffix
-// because their printed names are not unique.
-//
-// Ordinary function-local types (TypeName.Parent() != nil) are
-// disambiguated lazily from their declaration position: every
-// declaration in the package has a distinct (file, line, column)
-// triple, and the position is taken un-//line-adjusted so it is
-// stable across builds. Such types are only nameable inside their
-// declaring package, so the name does not need to agree with anything
-// computed in another package.
-//
-// Synthetic locals (TypeName.Parent() == nil), produced by generic
-// instantiation, are pre-registered by scanLocalTypes because their
-// names must agree across packages that materialize the same instance.
-func (c *compilerContext) getTypeCodeName(t types.Type) (name string, isLocal bool) {
 	switch t := types.Unalias(t).(type) {
 	case *types.Named:
-		tn := t.Obj()
+		if t.Obj().Parent() != t.Obj().Pkg().Scope() {
-		if tn.Pkg() == nil || tn.Parent() == tn.Pkg().Scope() {
+			return "named:" + t.String() + "$local", true
-			// Package-scope or builtin: the printed name is unique.
+		}
 		return "named:" + t.String(), false
-		}
-		if tn.Parent() != nil {
-			// Ordinary function-local type. Use the un-//line-adjusted
-			// declaration position as the disambiguator.
-			pos := c.program.Fset.PositionFor(tn.Pos(), false)
-			return fmt.Sprintf("named:%s$%s:%d:%d", t.String(), filepath.Base(pos.Filename), pos.Line, pos.Column), true
-		}
-		// Synthetic local from generic instantiation: must have been
-		// pre-registered by scanLocalTypes.
-		v := c.localTypeNames.At(t)
-		if v == nil {
-			panic("compiler: synthetic local type " + tn.Name() + " was not registered by scanLocalTypes")
-		}
-		return "named:" + v.(string), true
 	case *types.Array:
-		s, isLocal := c.getTypeCodeName(t.Elem())
+		s, isLocal := getTypeCodeName(t.Elem())
 		return "array:" + strconv.FormatInt(t.Len(), 10) + ":" + s, isLocal
 	case *types.Basic:
 		return "basic:" + basicTypeNames[t.Kind()], false
 	case *types.Chan:
-		s, isLocal := c.getTypeCodeName(t.Elem())
+		s, isLocal := getTypeCodeName(t.Elem())
 		var dir string
 		switch t.Dir() {
 		case types.SendOnly:
@@ -641,7 +613,7 @@ func (c *compilerContext) getTypeCodeName(t types.Type) (name string, isLocal bo
 			if !token.IsExported(name) {
 				name = t.Method(i).Pkg().Path() + "." + name
 			}
-			s, local := c.getTypeCodeName(t.Method(i).Type())
+			s, local := getTypeCodeName(t.Method(i).Type())
 			if local {
 				isLocal = true
 			}
@@ -649,17 +621,17 @@ func (c *compilerContext) getTypeCodeName(t types.Type) (name string, isLocal bo
 		}
 		return "interface:" + "{" + strings.Join(methods, ",") + "}", isLocal
 	case *types.Map:
-		keyType, keyLocal := c.getTypeCodeName(t.Key())
+		keyType, keyLocal := getTypeCodeName(t.Key())
-		elemType, elemLocal := c.getTypeCodeName(t.Elem())
+		elemType, elemLocal := getTypeCodeName(t.Elem())
 		return "map:" + "{" + keyType + "," + elemType + "}", keyLocal || elemLocal
 	case *types.Pointer:
-		s, isLocal := c.getTypeCodeName(t.Elem())
+		s, isLocal := getTypeCodeName(t.Elem())
 		return "pointer:" + s, isLocal
 	case *types.Signature:
 		isLocal := false
 		params := make([]string, t.Params().Len())
 		for i := 0; i < t.Params().Len(); i++ {
-			s, local := c.getTypeCodeName(t.Params().At(i).Type())
+			s, local := getTypeCodeName(t.Params().At(i).Type())
 			if local {
 				isLocal = true
 			}
@@ -667,7 +639,7 @@ func (c *compilerContext) getTypeCodeName(t types.Type) (name string, isLocal bo
 		}
 		results := make([]string, t.Results().Len())
 		for i := 0; i < t.Results().Len(); i++ {
-			s, local := c.getTypeCodeName(t.Results().At(i).Type())
+			s, local := getTypeCodeName(t.Results().At(i).Type())
 			if local {
 				isLocal = true
 			}
@@ -675,7 +647,7 @@ func (c *compilerContext) getTypeCodeName(t types.Type) (name string, isLocal bo
 		}
 		return "func:" + "{" + strings.Join(params, ",") + "}{" + strings.Join(results, ",") + "}", isLocal
 	case *types.Slice:
-		s, isLocal := c.getTypeCodeName(t.Elem())
+		s, isLocal := getTypeCodeName(t.Elem())
 		return "slice:" + s, isLocal
 	case *types.Struct:
 		elems := make([]string, t.NumFields())
@@ -685,7 +657,7 @@ func (c *compilerContext) getTypeCodeName(t types.Type) (name string, isLocal bo
 			if t.Field(i).Embedded() {
 				embedded = "#"
 			}
-			s, local := c.getTypeCodeName(t.Field(i).Type())
+			s, local := getTypeCodeName(t.Field(i).Type())
 			if local {
 				isLocal = true
 			}
@@ -700,232 +672,6 @@ func (c *compilerContext) getTypeCodeName(t types.Type) (name string, isLocal bo
 	}
 }
 
-// scanLocalTypes assigns names to every synthetic *types.TypeName
-// (TypeName.Parent() == nil) reachable from this package and stores
-// them in c.localTypeNames.
-//
-// Synthetic TypeNames are produced by generic instantiation: two
-// instantiations of the same generic function (e.g. F[int] and
-// F[string]) produce TypeNames with the same printed name and the
-// same source position, so each is named with the enclosing
-// instance's RelString as prefix. RelString encodes the type
-// arguments, matching Go's runtime behavior, where F[int].Inner and
-// F[string].Inner are distinct types even when Inner does not mention
-// the type parameter.
-//
-// A given instance may be materialized by several packages (the body
-// of F[int] is compiled in every package that calls F[int]); its
-// reflect/types.type:* global has LinkOnceODRLinkage and is merged by
-// name at link time. The chosen name therefore depends only on
-// intrinsic SSA properties (RelString and the raw token.Pos used as a
-// sort key), so any package compiling the same instance produces the
-// same identifier.
-//
-// Ordinary function-local TypeNames (TypeName.Parent() != nil) are
-// not handled here: they are nameable only inside their declaring
-// package, and getTypeCodeName derives a stable per-declaration name
-// for them directly from their source position.
-func (c *compilerContext) scanLocalTypes(ssaPkg *ssa.Package) {
-	// Locate every generic instance reachable from this package
-	// (including instances declared in imported packages and any
-	// function reached through an instance subtree).
-	var instances []*ssa.Function
-	seen := map[*ssa.Function]struct{}{}
-	var walk func(fn *ssa.Function, inInstance bool)
-	walk = func(fn *ssa.Function, inInstance bool) {
-		if fn == nil {
-			return
-		}
-		if _, ok := seen[fn]; ok {
-			return
-		}
-		// fn belongs to an instance subtree if it is itself an
-		// instantiation or if we reached it from one.
-		//
-		// len(TypeArgs()) is used instead of fn.Origin() because
-		// Origin() may call Build() on fn's declaring package, which
-		// would defeat per-package compilation.
-		isInstanceRoot := len(fn.TypeArgs()) > 0
-		if !isInstanceRoot && !inInstance && fn.Pkg != ssaPkg {
-			return
-		}
-		if fn.Blocks == nil && fn.AnonFuncs == nil {
-			return
-		}
-		seen[fn] = struct{}{}
-		isInInstance := inInstance || isInstanceRoot
-		if isInInstance {
-			instances = append(instances, fn)
-		}
-		for _, anon := range fn.AnonFuncs {
-			walk(anon, isInInstance)
-		}
-		var ops [10]*ssa.Value
-		for _, b := range fn.Blocks {
-			for _, instr := range b.Instrs {
-				for _, op := range instr.Operands(ops[:0]) {
-					if op == nil || *op == nil {
-						continue
-					}
-					if callee, ok := (*op).(*ssa.Function); ok {
-						walk(callee, isInInstance)
-					}
-				}
-			}
-		}
-	}
-	for _, member := range ssaPkg.Members {
-		switch m := member.(type) {
-		case *ssa.Function:
-			walk(m, false)
-		case *ssa.Type:
-			mset := c.program.MethodSets.MethodSet(m.Type())
-			for method := range mset.Methods() {
-				walk(c.program.MethodValue(method), false)
-			}
-			pmset := c.program.MethodSets.MethodSet(types.NewPointer(m.Type()))
-			for method := range pmset.Methods() {
-				walk(c.program.MethodValue(method), false)
-			}
-		}
-	}
-
-	// Registration is first-writer-wins (a synthetic TypeName may be
-	// reachable from several instances), so visit instances in a
-	// deterministic order. Pos() is a defensive tiebreaker.
-	sort.Slice(instances, func(i, j int) bool {
-		ri, rj := instances[i].RelString(nil), instances[j].RelString(nil)
-		if ri != rj {
-			return ri < rj
-		}
-		return instances[i].Pos() < instances[j].Pos()
-	})
-	for _, fn := range instances {
-		c.registerSyntheticLocalTypes(fn)
-	}
-}
-
-// registerSyntheticLocalTypes walks every type reachable from fn's
-// body and records each synthetic *types.Named (TypeName.Parent() ==
-// nil) in c.localTypeNames. Each is named with fn.RelString as the
-// owning function plus a per-function counter assigned in source
-// order.
-//
-// First-writer-wins: a *types.Named already present in
-// c.localTypeNames is left alone, so a synthetic type reachable from
-// several instances keeps the name assigned by the first (in
-// scanLocalTypes' deterministic order).
-func (c *compilerContext) registerSyntheticLocalTypes(fn *ssa.Function) {
-	var found []*types.Named
-	seen := map[types.Type]struct{}{}
-	var visit func(t types.Type)
-	visit = func(t types.Type) {
-		if t == nil {
-			return
-		}
-		if _, ok := seen[t]; ok {
-			return
-		}
-		seen[t] = struct{}{}
-		switch t := t.(type) {
-		case *types.Alias:
-			visit(types.Unalias(t))
-		case *types.Named:
-			tn := t.Obj()
-			if tn.Pkg() != nil && tn.Parent() == nil {
-				if c.localTypeNames.At(t) == nil {
-					// Reserve the slot so later calls within this
-					// scanLocalTypes invocation skip it; the final
-					// name is filled in after sorting, before any
-					// getTypeCodeName lookups happen.
-					c.localTypeNames.Set(t, "")
-					found = append(found, t)
-				}
-			}
-			targs := t.TypeArgs()
-			for t := range targs.Types() {
-				visit(t)
-			}
-			visit(t.Underlying())
-		case *types.Pointer:
-			visit(t.Elem())
-		case *types.Slice:
-			visit(t.Elem())
-		case *types.Array:
-			visit(t.Elem())
-		case *types.Chan:
-			visit(t.Elem())
-		case *types.Map:
-			visit(t.Key())
-			visit(t.Elem())
-		case *types.Struct:
-			for field := range t.Fields() {
-				visit(field.Type())
-			}
-		case *types.Signature:
-			if p := t.Params(); p != nil {
-				for v := range p.Variables() {
-					visit(v.Type())
-				}
-			}
-			if r := t.Results(); r != nil {
-				for v := range r.Variables() {
-					visit(v.Type())
-				}
-			}
-		case *types.Tuple:
-			for v := range t.Variables() {
-				visit(v.Type())
-			}
-		case *types.Interface:
-			// A synthetic local type can be reachable only through a
-			// local interface's method signature, so descend into
-			// them. getTypeCodeName encodes those signatures into
-			// the interface's identifier, and the seen map breaks
-			// cycles formed by methods that mention the interface
-			// itself.
-			for method := range t.Methods() {
-				visit(method.Type())
-			}
-		}
-	}
-	for _, p := range fn.Params {
-		visit(p.Type())
-	}
-	for _, fv := range fn.FreeVars {
-		visit(fv.Type())
-	}
-	for _, l := range fn.Locals {
-		visit(l.Type())
-	}
-	var ops [10]*ssa.Value
-	for _, b := range fn.Blocks {
-		for _, instr := range b.Instrs {
-			if v, ok := instr.(ssa.Value); ok {
-				visit(v.Type())
-			}
-			for _, op := range instr.Operands(ops[:0]) {
-				if op != nil && *op != nil {
-					visit((*op).Type())
-				}
-			}
-		}
-	}
-	if len(found) == 0 {
-		return
-	}
-	// Sort by raw token.Pos: this gives a total order on declarations
-	// that is stable across builds and unaffected by //line directives
-	// (which only adjust the human-facing position from Fset.Position).
-	sort.Slice(found, func(i, j int) bool {
-		return found[i].Obj().Pos() < found[j].Obj().Pos()
-	})
-	enclosing := fn.RelString(nil)
-	for i, named := range found {
-		c.localTypeNames.Set(named, fmt.Sprintf("%s.%s$%d", enclosing, named.Obj().Name(), i))
-	}
-}
-
 // getTypeMethodSet returns a reference (GEP) to a global method set. This
 // method set should be unreferenced after the interface lowering pass.
 func (c *compilerContext) getTypeMethodSet(typ types.Type) llvm.Value {
@@ -936,7 +682,8 @@ func (c *compilerContext) getTypeMethodSet(typ types.Type) llvm.Value {
 
 		// Create method set.
 		var signatures, wrappers []llvm.Value
-		for method := range ms.Methods() {
+		for i := 0; i < ms.Len(); i++ {
+			method := ms.At(i)
 			signatureGlobal := c.getMethodSignature(method.Obj().(*types.Func))
 			signatures = append(signatures, signatureGlobal)
 			fn := c.program.MethodValue(method)
@@ -1022,7 +769,7 @@ func (b *builder) createTypeAssert(expr *ssa.TypeAssert) llvm.Value {
 			commaOk = b.createInterfaceTypeAssert(intf, actualTypeNum)
 		}
 	} else {
-		name, _ := b.getTypeCodeName(expr.AssertedType)
+		name, _ := getTypeCodeName(expr.AssertedType)
 		globalName := "reflect/types.typeid:" + name
 		assertedTypeCodeGlobal := b.mod.NamedGlobal(globalName)
 		if assertedTypeCodeGlobal.IsNil() {
@@ -1049,10 +796,8 @@ func (b *builder) createTypeAssert(expr *ssa.TypeAssert) llvm.Value {
 
 	prevBlock := b.GetInsertBlock()
 	okBlock := b.insertBasicBlock("typeassert.ok")
-
-	if expr.CommaOk {
 	nextBlock := b.insertBasicBlock("typeassert.next")
-		b.currentBlockInfo.exit = nextBlock
+	b.currentBlockInfo.exit = nextBlock // adjust outgoing block for phi nodes
 	b.CreateCondBr(commaOk, okBlock, nextBlock)
 
 	// Retrieve the value from the interface if the type assert was
@@ -1075,40 +820,17 @@ func (b *builder) createTypeAssert(expr *ssa.TypeAssert) llvm.Value {
 	phi := b.CreatePHI(assertedType, "typeassert.value")
 	phi.AddIncoming([]llvm.Value{llvm.ConstNull(assertedType), valueOk}, []llvm.BasicBlock{prevBlock, okBlock})
 
+	if expr.CommaOk {
 		tuple := b.ctx.ConstStruct([]llvm.Value{llvm.Undef(assertedType), llvm.Undef(b.ctx.Int1Type())}, false) // create empty tuple
 		tuple = b.CreateInsertValue(tuple, phi, 0, "")                                                          // insert value
 		tuple = b.CreateInsertValue(tuple, commaOk, 1, "")                                                      // insert 'comma ok' boolean
 		return tuple
 	} else {
-		// Type assert without comma-ok. If it fails, panic.
+		// This is kind of dirty as the branch above becomes mostly useless,
-		faultBlock := b.getInterfaceAssertBlock()
+		// but hopefully this gets optimized away.
-		b.currentBlockInfo.exit = okBlock
+		b.createRuntimeCall("interfaceTypeAssert", []llvm.Value{commaOk}, "")
-		b.CreateCondBr(commaOk, okBlock, faultBlock)
+		return phi
-
-		// OK: extract the value from the interface.
-		b.SetInsertPointAtEnd(okBlock)
-		if _, ok := expr.AssertedType.Underlying().(*types.Interface); ok {
-			return itf
 	}
-		return b.extractValueFromInterface(itf, assertedType)
-	}
-}
-
-func (b *builder) getInterfaceAssertBlock() llvm.BasicBlock {
-	if !b.interfaceAssertBlock.IsNil() {
-		return b.interfaceAssertBlock
-	}
-	savedBlock := b.GetInsertBlock()
-	block := b.ctx.AddBasicBlock(b.llvmFn, "typeassert.throw")
-	b.interfaceAssertBlock = block
-	b.SetInsertPointAtEnd(block)
-	if b.hasDeferFrame() {
-		b.createFaultCheckpoint()
-	}
-	b.createRuntimeCall("interfaceTypeAssert", []llvm.Value{llvm.ConstInt(b.ctx.Int1Type(), 0, false)}, "")
-	b.CreateUnreachable()
-	b.SetInsertPointAtEnd(savedBlock)
-	return block
 }
 
 // getMethodsString returns a string to be used in the "tinygo-methods" string
@@ -1135,7 +857,7 @@ func (c *compilerContext) getMethodSetValue(methods []*types.Func) llvm.Value {
 		if !token.IsExported(name) {
 			name = method.Pkg().Path() + "." + name
 		}
-		s, _ := c.getTypeCodeName(method.Type())
+		s, _ := getTypeCodeName(method.Type())
 		globalName := "reflect/types.signature:" + name + ":" + s
 		value := c.mod.NamedGlobal(globalName)
 		if value.IsNil() {
@@ -1179,14 +901,14 @@ func (c *compilerContext) getMethodSetValue(methods []*types.Func) llvm.Value {
 // thunk is declared, not defined: it will be defined by the interface lowering
 // pass.
 func (c *compilerContext) getInvokeFunction(instr *ssa.CallCommon) llvm.Value {
-	s, _ := c.getTypeCodeName(instr.Value.Type().Underlying())
+	s, _ := getTypeCodeName(instr.Value.Type().Underlying())
 	fnName := s + "." + instr.Method.Name() + "$invoke"
 	llvmFn := c.mod.NamedFunction(fnName)
 	if llvmFn.IsNil() {
 		sig := instr.Method.Type().(*types.Signature)
 		var paramTuple []*types.Var
-		for v := range sig.Params().Variables() {
+		for i := 0; i < sig.Params().Len(); i++ {
-			paramTuple = append(paramTuple, v)
+			paramTuple = append(paramTuple, sig.Params().At(i))
 		}
 		paramTuple = append(paramTuple, types.NewVar(token.NoPos, nil, "$typecode", types.Typ[types.UnsafePointer]))
 		llvmFnType := c.getLLVMFunctionType(types.NewSignature(sig.Recv(), types.NewTuple(paramTuple...), sig.Results(), false))
@@ -1204,7 +926,7 @@ func (c *compilerContext) getInvokeFunction(instr *ssa.CallCommon) llvm.Value {
 // by the interface lowering pass as a type-ID comparison chain, avoiding the
 // need for runtime.typeImplementsMethodSet at compile time.
 func (b *builder) createInterfaceTypeAssert(intf *types.Interface, actualType llvm.Value) llvm.Value {
-	s, _ := b.getTypeCodeName(intf)
+	s, _ := getTypeCodeName(intf)
 	fnName := s + ".$typeassert"
 	llvmFn := b.mod.NamedFunction(fnName)
 	if llvmFn.IsNil() {
@@ -1303,38 +1025,34 @@ func methodSignature(method *types.Func) string {
 //	() string
 //	(string, int) (int, error)
 func signature(sig *types.Signature) string {
-	var s strings.Builder
+	s := ""
 	if sig.Params().Len() == 0 {
-		s.WriteString("()")
+		s += "()"
 	} else {
-		s.WriteString("(")
+		s += "("
-		i := 0
+		for i := 0; i < sig.Params().Len(); i++ {
-		for v := range sig.Params().Variables() {
 			if i > 0 {
-				s.WriteString(", ")
+				s += ", "
 			}
-			s.WriteString(typestring(v.Type()))
+			s += typestring(sig.Params().At(i).Type())
-			i++
 		}
-		s.WriteString(")")
+		s += ")"
 	}
 	if sig.Results().Len() == 0 {
 		// keep as-is
 	} else if sig.Results().Len() == 1 {
-		s.WriteString(" " + typestring(sig.Results().At(0).Type()))
+		s += " " + typestring(sig.Results().At(0).Type())
 	} else {
-		s.WriteString(" (")
+		s += " ("
-		i := 0
+		for i := 0; i < sig.Results().Len(); i++ {
-		for v := range sig.Results().Variables() {
 			if i > 0 {
-				s.WriteString(", ")
+				s += ", "
 			}
-			s.WriteString(typestring(v.Type()))
+			s += typestring(sig.Results().At(i).Type())
-			i++
 		}
-		s.WriteString(")")
+		s += ")"
 	}
-	return s.String()
+	return s
 }
 
 // typestring returns a stable (human-readable) type string for the given type

compiler/intrinsics.go

@@ -7,7 +7,6 @@ import (
 	"strconv"
 	"strings"
 
-	"github.com/tinygo-org/tinygo/compiler/llvmutil"
 	"tinygo.org/x/go-llvm"
 )
 
@@ -167,22 +166,12 @@ func (b *builder) createMachineKeepAliveImpl() {
 }
 
 var mathToLLVMMapping = map[string]string{
-	"math.Acos":  "llvm.acos.f64",
-	"math.Asin":  "llvm.asin.f64",
-	"math.Atan":  "llvm.atan.f64",
-	"math.Atan2": "llvm.atan2.f64",
 	"math.Ceil":  "llvm.ceil.f64",
-	"math.Cos":   "llvm.cos.f64",
-	"math.Cosh":  "llvm.cosh.f64",
 	"math.Exp":   "llvm.exp.f64",
 	"math.Exp2":  "llvm.exp2.f64",
 	"math.Floor": "llvm.floor.f64",
 	"math.Log":   "llvm.log.f64",
-	"math.Sin":   "llvm.sin.f64",
-	"math.Sinh":  "llvm.sinh.f64",
 	"math.Sqrt":  "llvm.sqrt.f64",
-	"math.Tan":   "llvm.tan.f64",
-	"math.Tanh":  "llvm.tanh.f64",
 	"math.Trunc": "llvm.trunc.f64",
 }
 
@@ -196,40 +185,18 @@ var mathToLLVMMapping = map[string]string{
 // float32(math.Sqrt(float64(v))) to a 32-bit floating point operation, which is
 // beneficial on architectures where 64-bit floating point operations are (much)
 // more expensive than 32-bit ones.
-func (b *builder) defineMathOp() bool {
+func (b *builder) defineMathOp() {
-	llvmName, ok := mathToLLVMMapping[b.fn.RelString(nil)]
-	if !ok {
-		return false
-	}
-	if strings.HasSuffix(b.Triple, "-wasi") || llvmutil.Version() < 19 {
-		// We don't have a real libc for wasip2. Until that is fixed, we need to
-		// limit math intrinsics on WASI to a subset supported natively in
-		// WebAssembly.
-		// Also, since we don't know the specific libc we will target, disallow
-		// these for all WASI targets.
-		//
-		// We also need to limit ourselves to LLVM 19 and above for the extended
-		// set of math intrinsics, see:
-		// https://discourse.llvm.org/t/rfc-all-the-math-intrinsics/78294
-		switch b.fn.Name() {
-		case "Ceil", "Exp", "Exp2", "Floor", "Log", "Sqrt", "Trunc":
-		default:
-			return false
-		}
-	}
 	b.createFunctionStart(true)
+	llvmName := mathToLLVMMapping[b.fn.RelString(nil)]
+	if llvmName == "" {
+		panic("unreachable: unknown math operation") // sanity check
+	}
 	llvmFn := b.mod.NamedFunction(llvmName)
 	if llvmFn.IsNil() {
 		// The intrinsic doesn't exist yet, so declare it.
-		var llvmType llvm.Type
+		// At the moment, all supported intrinsics have the form "double
-		switch b.fn.Name() {
+		// foo(double %x)" so we can hardcode the signature here.
-		case "Atan2":
+		llvmType := llvm.FunctionType(b.ctx.DoubleType(), []llvm.Type{b.ctx.DoubleType()}, false)
-			// double atan2(double %y, double %x)
-			llvmType = llvm.FunctionType(b.ctx.DoubleType(), []llvm.Type{b.ctx.DoubleType(), b.ctx.DoubleType()}, false)
-		default:
-			// double foo(double %x)
-			llvmType = llvm.FunctionType(b.ctx.DoubleType(), []llvm.Type{b.ctx.DoubleType()}, false)
-		}
 		llvmFn = llvm.AddFunction(b.mod, llvmName, llvmType)
 	}
 	// Create a call to the intrinsic.
@@ -239,7 +206,6 @@ func (b *builder) defineMathOp() bool {
 	}
 	result := b.CreateCall(llvmFn.GlobalValueType(), llvmFn, args, "")
 	b.CreateRet(result)
-	return true
 }
 
 func (b *builder) defineCryptoIntrinsic() bool {

compiler/llvm.go

@@ -129,7 +129,11 @@ func (b *builder) emitPointerPack(values []llvm.Value) llvm.Value {
 		// Packed data is bigger than a pointer, so allocate it on the heap.
 		sizeValue := llvm.ConstInt(b.uintptrType, size, false)
 		align := b.targetData.ABITypeAlignment(packedType)
-		packedAlloc := b.createAlloc(sizeValue, llvm.ConstNull(b.dataPtrType), align, "")
+		packedAlloc := b.createRuntimeCall(b.allocFunc(), []llvm.Value{
+			sizeValue,
+			llvm.ConstNull(b.dataPtrType),
+		}, "")
+		packedAlloc.AddCallSiteAttribute(0, b.ctx.CreateEnumAttribute(llvm.AttributeKindID("align"), uint64(align)))
 		if b.NeedsStackObjects {
 			b.trackPointer(packedAlloc)
 		}
@@ -206,7 +210,7 @@ func (c *compilerContext) makeGlobalArray(buf []byte, name string, elementType l
 	globalType := llvm.ArrayType(elementType, len(buf))
 	global := llvm.AddGlobal(c.mod, globalType, name)
 	value := llvm.Undef(globalType)
-	for i := range buf {
+	for i := 0; i < len(buf); i++ {
 		ch := uint64(buf[i])
 		value = c.builder.CreateInsertValue(value, llvm.ConstInt(elementType, ch, false), i, "")
 	}
@@ -390,7 +394,7 @@ func (c *compilerContext) buildPointerBitmap(
 			return
 		}
 		elementSize /= ptrAlign
-		for i := range len {
+		for i := 0; i < len; i++ {
 			c.buildPointerBitmap(
 				dst,
 				ptrAlign,
@@ -417,7 +421,7 @@ func (c *compilerContext) archFamily() string {
 // features string is not one for an ARM architecture.
 func (c *compilerContext) isThumb() bool {
 	var isThumb, isNotThumb bool
-	for feature := range strings.SplitSeq(c.Features, ",") {
+	for _, feature := range strings.Split(c.Features, ",") {
 		if feature == "+thumb-mode" {
 			isThumb = true
 		}

compiler/map.go

@@ -7,7 +7,6 @@ import (
 	"go/token"
 	"go/types"
 	"golang.org/x/tools/go/ssa"
-	"strings"
 	"tinygo.org/x/go-llvm"
 )
 
@@ -134,7 +133,7 @@ func (b *builder) createMapUpdate(keyType types.Type, m, key, value llvm.Value,
 	if t, ok := keyType.(*types.Basic); ok && t.Info()&types.IsString != 0 {
 		// key is a string
 		params := []llvm.Value{m, key, valueAlloca}
-		b.createRuntimeInvoke("hashmapStringSet", params, "")
+		b.createRuntimeCall("hashmapStringSet", params, "")
 	} else {
 		// Key stored at actual type.
 		keyAlloca, keySize := b.createTemporaryAlloca(key.Type(), "hashmap.key")
@@ -144,7 +143,7 @@ func (b *builder) createMapUpdate(keyType types.Type, m, key, value llvm.Value,
 			fnName = "hashmapGenericSet"
 		}
 		params := []llvm.Value{m, keyAlloca, valueAlloca}
-		b.createRuntimeInvoke(fnName, params, "")
+		b.createRuntimeCall(fnName, params, "")
 		b.emitLifetimeEnd(keyAlloca, keySize)
 	}
 	b.emitLifetimeEnd(valueAlloca, valueSize)
@@ -294,15 +293,14 @@ func hashmapCanonicalTypeName(t types.Type) string {
 		}
 		return t.String()
 	case *types.Struct:
-		var s strings.Builder
+		s := "struct{"
-		s.WriteString("struct{")
 		for i := 0; i < t.NumFields(); i++ {
 			if i > 0 {
-				s.WriteString("; ")
+				s += "; "
 			}
-			s.WriteString(hashmapCanonicalTypeName(t.Field(i).Type()))
+			s += hashmapCanonicalTypeName(t.Field(i).Type())
 		}
-		return s.String() + "}"
+		return s + "}"
 	case *types.Array:
 		return fmt.Sprintf("[%d]%s", t.Len(), hashmapCanonicalTypeName(t.Elem()))
 	}

compiler/sizes.go

@@ -29,7 +29,8 @@ func (s *stdSizes) Alignof(T types.Type) int64 {
 		// is the largest of the values unsafe.Alignof(x.f) for each
 		// field f of x, but at least 1."
 		max := int64(1)
-		for f := range t.Fields() {
+		for i := 0; i < t.NumFields(); i++ {
+			f := t.Field(i)
 			if a := s.Alignof(f.Type()); a > max {
 				max = a
 			}

compiler/symbol.go

@@ -8,8 +8,6 @@ import (
 	"go/ast"
 	"go/token"
 	"go/types"
-	"path/filepath"
-	"slices"
 	"strconv"
 	"strings"
 
@@ -87,8 +85,8 @@ func (c *compilerContext) getFunction(fn *ssa.Function) (llvm.Type, llvm.Value)
 		retType = c.getLLVMType(fn.Signature.Results().At(0).Type())
 	} else {
 		results := make([]llvm.Type, 0, fn.Signature.Results().Len())
-		for v := range fn.Signature.Results().Variables() {
+		for i := 0; i < fn.Signature.Results().Len(); i++ {
-			results = append(results, c.getLLVMType(v.Type()))
+			results = append(results, c.getLLVMType(fn.Signature.Results().At(i).Type()))
 		}
 		retType = c.ctx.StructType(results, false)
 	}
@@ -164,7 +162,7 @@ func (c *compilerContext) getFunction(fn *ssa.Function) (llvm.Type, llvm.Value)
 		llvmFn.AddAttributeAtIndex(1, c.ctx.CreateEnumAttribute(llvm.AttributeKindID("nocapture"), 0))
 	case "machine.keepAliveNoEscape", "machine.unsafeNoEscape":
 		llvmFn.AddAttributeAtIndex(1, c.ctx.CreateEnumAttribute(llvm.AttributeKindID("nocapture"), 0))
-	case "runtime.alloc", "runtime.alloc_noheap", "runtime.alloc_zero":
+	case "runtime.alloc", "runtime.alloc_noheap":
 		// Tell the optimizer that runtime.alloc is an allocator, meaning that it
 		// returns values that are never null and never alias to an existing value.
 		for _, attrName := range []string{"noalias", "nonnull"} {
@@ -324,12 +322,6 @@ func (c *compilerContext) getFunctionInfo(f *ssa.Function) functionInfo {
 		linkName: f.RelString(nil),
 	}
 
-	// RelString is not unique for local type arguments, so add a suffix
-	// when needed.
-	if suffix := c.localTypeArgsSuffix(f); suffix != "" {
-		info.linkName += suffix
-	}
-
 	// Check for a few runtime functions that are treated specially.
 	if info.linkName == "runtime.wasmEntryReactor" && c.BuildMode == "c-shared" {
 		info.linkName = "_initialize"
@@ -354,42 +346,6 @@ func (c *compilerContext) getFunctionInfo(f *ssa.Function) functionInfo {
 	return info
 }
 
-func (c *compilerContext) localTypeArgsSuffix(f *ssa.Function) string {
-	typeArgs := f.TypeArgs()
-	if len(typeArgs) == 0 {
-		return ""
-	}
-	var hasLocal bool
-	parts := make([]string, len(typeArgs))
-	for i, ta := range typeArgs {
-		name, isLocal := c.getTypeCodeName(ta)
-		if isLocal {
-			hasLocal = true
-		}
-		// A function-local type alias (e.g. `type F = float64` inside a
-		// function body) is invisible to getTypeCodeName because it calls
-		// types.Unalias first. Two callers that use distinct aliases with
-		// the same name (e.g. Go 1.27's internal/strconv.ftoa32 and ftoa64
-		// both declare a local `type F = ...`) then produce identical
-		// RelStrings for their shortFloat[F] instantiations and collide on
-		// mod.NamedFunction. Treat these aliases as local so the suffix
-		// disambiguates them.
-		if alias, ok := ta.(*types.Alias); ok {
-			if obj := alias.Obj(); obj.Pkg() != nil && obj.Parent() != obj.Pkg().Scope() {
-				hasLocal = true
-				pos := c.program.Fset.PositionFor(obj.Pos(), false)
-				parts[i] = fmt.Sprintf("%s$alias:%s:%d:%d", name, filepath.Base(pos.Filename), pos.Line, pos.Column)
-				continue
-			}
-		}
-		parts[i] = name
-	}
-	if !hasLocal {
-		return ""
-	}
-	return "$localtype:" + strings.Join(parts, ",")
-}
-
 // parsePragmas is used by getFunctionInfo to parse function pragmas such as
 // //export or //go:noinline.
 func (c *compilerContext) parsePragmas(info *functionInfo, f *ssa.Function) {
@@ -416,51 +372,6 @@ func (c *compilerContext) parsePragmas(info *functionInfo, f *ssa.Function) {
 		}
 	}
 
-	// Also scan file-level //go:linkname directives. These appear as
-	// free-standing comments in *ast.File.Comments (not attached to any
-	// declaration), and are used by modern golang.org/x/sys/unix and others.
-	// Function-attached directives (above) take precedence — we only add
-	// file-level ones if no doc-comment linkname was found for this function.
-	//
-	// TODO: the hasUnsafeImport gate enforced downstream (see the
-	// //go:linkname case below) is package-level. gc enforces it per
-	// file, on the file containing the directive. For file-level
-	// linknames this is more important than for function-attached ones,
-	// because the directive can live in a file separate from the
-	// function. A stricter implementation would check whether the file
-	// returned by fileForFunc imports "unsafe", not whether any file in
-	// the package does.
-	hasFunctionLinkname := false
-	for _, comment := range pragmas {
-		if strings.HasPrefix(comment.Text, "//go:linkname ") {
-			parts := strings.Fields(comment.Text)
-			if len(parts) == 3 && parts[1] == f.Name() {
-				hasFunctionLinkname = true
-				break
-			}
-		}
-	}
-	if !hasFunctionLinkname {
-		if file := c.fileForFunc(f); file != nil {
-			for _, group := range file.Comments {
-				// Skip the function's own doc comment — already handled above.
-				if decl, ok := syntax.(*ast.FuncDecl); ok && group == decl.Doc {
-					continue
-				}
-				for _, comment := range group.List {
-					if !strings.HasPrefix(comment.Text, "//go:linkname ") {
-						continue
-					}
-					parts := strings.Fields(comment.Text)
-					if len(parts) != 3 || parts[1] != f.Name() {
-						continue
-					}
-					pragmas = append(pragmas, comment)
-				}
-			}
-		}
-	}
-
 	// Parse each pragma.
 	for _, comment := range pragmas {
 		parts := strings.Fields(comment.Text)
@@ -478,7 +389,7 @@ func (c *compilerContext) parsePragmas(info *functionInfo, f *ssa.Function) {
 			info.wasmName = info.linkName
 			info.exported = true
 		case "//go:interrupt":
-			if slices.Contains(f.Pkg.Pkg.Imports(), types.Unsafe) {
+			if hasUnsafeImport(f.Pkg.Pkg) {
 				info.interrupt = true
 			}
 		case "//go:wasm-module":
@@ -540,14 +451,14 @@ func (c *compilerContext) parsePragmas(info *functionInfo, f *ssa.Function) {
 			// This is a slightly looser requirement than what gc uses: gc
 			// requires the file to import "unsafe", not the package as a
 			// whole.
-			if slices.Contains(f.Pkg.Pkg.Imports(), types.Unsafe) {
+			if hasUnsafeImport(f.Pkg.Pkg) {
 				info.linkName = parts[2]
 			}
 		case "//go:section":
 			// Only enable go:section when the package imports "unsafe".
 			// go:section also implies go:noinline since inlining could
 			// move the code to a different section than that requested.
-			if len(parts) == 2 && slices.Contains(f.Pkg.Pkg.Imports(), types.Unsafe) {
+			if len(parts) == 2 && hasUnsafeImport(f.Pkg.Pkg) {
 				info.section = parts[1]
 				info.inline = inlineNone
 			}
@@ -556,7 +467,7 @@ func (c *compilerContext) parsePragmas(info *functionInfo, f *ssa.Function) {
 			// runtime functions.
 			// This is somewhat dangerous and thus only imported in packages
 			// that import unsafe.
-			if slices.Contains(f.Pkg.Pkg.Imports(), types.Unsafe) {
+			if hasUnsafeImport(f.Pkg.Pkg) {
 				info.nobounds = true
 			}
 		case "//go:noescape":
@@ -656,8 +567,8 @@ func (c *compilerContext) isValidWasmType(typ types.Type, site wasmSite) bool {
 				hasHostLayout = false // package structs added in go1.23
 			}
 		}
-		for field := range typ.Fields() {
+		for i := 0; i < typ.NumFields(); i++ {
-			ftyp := field.Type()
+			ftyp := typ.Field(i).Type()
 			if types.Unalias(ftyp).String() == "structs.HostLayout" {
 				hasHostLayout = true
 				continue
@@ -689,8 +600,8 @@ func getParams(sig *types.Signature) []*types.Var {
 	if sig.Recv() != nil {
 		params = append(params, sig.Recv())
 	}
-	for v := range sig.Params().Variables() {
+	for i := 0; i < sig.Params().Len(); i++ {
-		params = append(params, v)
+		params = append(params, sig.Params().At(i))
 	}
 	return params
 }
@@ -755,34 +666,6 @@ type globalInfo struct {
 	section  string // go:section
 }
 
-// fileForFunc returns the *ast.File that contains the declaration of f, or
-// nil if it cannot be determined. File-level pragmas are only consulted for
-// functions in the package currently being compiled — functions imported from
-// other packages have their file-level pragmas processed when those packages
-// are compiled.
-func (c *compilerContext) fileForFunc(f *ssa.Function) *ast.File {
-	if c.loaderPkg == nil || f.Pkg == nil || f.Pkg.Pkg != c.loaderPkg.Pkg {
-		return nil
-	}
-	syntax := f.Syntax()
-	if f.Origin() != nil {
-		syntax = f.Origin().Syntax()
-	}
-	if syntax == nil {
-		return nil
-	}
-	pos := syntax.Pos()
-	if !pos.IsValid() {
-		return nil
-	}
-	for _, file := range c.loaderPkg.Files {
-		if file.FileStart <= pos && pos < file.FileEnd {
-			return file
-		}
-	}
-	return nil
-}
-
 // loadASTComments loads comments on globals from the AST, for use later in the
 // program. In particular, they are required for //go:extern pragmas on globals.
 func (c *compilerContext) loadASTComments(pkg *loader.Package) {
@@ -821,7 +704,10 @@ func (c *compilerContext) getGlobal(g *ssa.Global) llvm.Value {
 		llvmGlobal = llvm.AddGlobal(c.mod, llvmType, info.linkName)
 
 		// Set alignment from the //go:align comment.
-		alignment := max(info.align, c.targetData.ABITypeAlignment(llvmType))
+		alignment := c.targetData.ABITypeAlignment(llvmType)
+		if info.align > alignment {
+			alignment = info.align
+		}
 		if alignment <= 0 || alignment&(alignment-1) != 0 {
 			// Check for power-of-two (or 0).
 			// See: https://stackoverflow.com/a/108360
@@ -895,7 +781,7 @@ func (info *globalInfo) parsePragmas(doc *ast.CommentGroup, c *compilerContext,
 			// This is a slightly looser requirement than what gc uses: gc
 			// requires the file to import "unsafe", not the package as a
 			// whole.
-			if slices.Contains(g.Pkg.Pkg.Imports(), types.Unsafe) {
+			if hasUnsafeImport(g.Pkg.Pkg) {
 				info.linkName = parts[2]
 			}
 		}
@@ -911,3 +797,13 @@ func getAllMethods(prog *ssa.Program, typ types.Type) []*types.Selection {
 	}
 	return methods
 }
+
+// Return true if this package imports "unsafe", false otherwise.
+func hasUnsafeImport(pkg *types.Package) bool {
+	for _, imp := range pkg.Imports() {
+		if imp == types.Unsafe {
+			return true
+		}
+	}
+	return false
+}

compiler/syscall.go

@@ -26,25 +26,24 @@ func (b *builder) createRawSyscall(call *ssa.CallCommon) (llvm.Value, error) {
 		argTypes := []llvm.Type{b.uintptrType}
 		// Constraints will look something like:
 		//   "={rax},0,{rdi},{rsi},{rdx},{r10},{r8},{r9},~{rcx},~{r11}"
-		var constraints strings.Builder
+		constraints := "={rax},0"
-		constraints.WriteString("={rax},0")
 		for i, arg := range call.Args[1:] {
-			constraints.WriteString("," + [...]string{
+			constraints += "," + [...]string{
 				"{rdi}",
 				"{rsi}",
 				"{rdx}",
 				"{r10}",
 				"{r8}",
 				"{r9}",
-			}[i])
+			}[i]
 			llvmValue := b.getValue(arg, getPos(call))
 			args = append(args, llvmValue)
 			argTypes = append(argTypes, llvmValue.Type())
 		}
 		// rcx and r11 are clobbered by the syscall, so make sure they are not used
-		constraints.WriteString(",~{rcx},~{r11}")
+		constraints += ",~{rcx},~{r11}"
 		fnType := llvm.FunctionType(b.uintptrType, argTypes, false)
-		target := llvm.InlineAsm(fnType, "syscall", constraints.String(), true, false, llvm.InlineAsmDialectIntel, false)
+		target := llvm.InlineAsm(fnType, "syscall", constraints, true, false, llvm.InlineAsmDialectIntel, false)
 		return b.CreateCall(fnType, target, args, ""), nil
 
 	case b.GOARCH == "386" && b.GOOS == "linux":
@@ -56,23 +55,22 @@ func (b *builder) createRawSyscall(call *ssa.CallCommon) (llvm.Value, error) {
 		argTypes := []llvm.Type{b.uintptrType}
 		// Constraints will look something like:
 		//   "={eax},0,{ebx},{ecx},{edx},{esi},{edi},{ebp}"
-		var constraints strings.Builder
+		constraints := "={eax},0"
-		constraints.WriteString("={eax},0")
 		for i, arg := range call.Args[1:] {
-			constraints.WriteString("," + [...]string{
+			constraints += "," + [...]string{
 				"{ebx}",
 				"{ecx}",
 				"{edx}",
 				"{esi}",
 				"{edi}",
 				"{ebp}",
-			}[i])
+			}[i]
 			llvmValue := b.getValue(arg, getPos(call))
 			args = append(args, llvmValue)
 			argTypes = append(argTypes, llvmValue.Type())
 		}
 		fnType := llvm.FunctionType(b.uintptrType, argTypes, false)
-		target := llvm.InlineAsm(fnType, "int 0x80", constraints.String(), true, false, llvm.InlineAsmDialectIntel, false)
+		target := llvm.InlineAsm(fnType, "int 0x80", constraints, true, false, llvm.InlineAsmDialectIntel, false)
 		return b.CreateCall(fnType, target, args, ""), nil
 
 	case b.GOARCH == "arm" && b.GOOS == "linux":
@@ -90,10 +88,9 @@ func (b *builder) createRawSyscall(call *ssa.CallCommon) (llvm.Value, error) {
 		argTypes := []llvm.Type{}
 		// Constraints will look something like:
 		//   ={r0},0,{r1},{r2},{r7},~{r3}
-		var constraints strings.Builder
+		constraints := "={r0}"
-		constraints.WriteString("={r0}")
 		for i, arg := range call.Args[1:] {
-			constraints.WriteString("," + [...]string{
+			constraints += "," + [...]string{
 				"0", // tie to output
 				"{r1}",
 				"{r2}",
@@ -101,20 +98,20 @@ func (b *builder) createRawSyscall(call *ssa.CallCommon) (llvm.Value, error) {
 				"{r4}",
 				"{r5}",
 				"{r6}",
-			}[i])
+			}[i]
 			llvmValue := b.getValue(arg, getPos(call))
 			args = append(args, llvmValue)
 			argTypes = append(argTypes, llvmValue.Type())
 		}
 		args = append(args, num)
 		argTypes = append(argTypes, b.uintptrType)
-		constraints.WriteString(",{r7}") // syscall number
+		constraints += ",{r7}" // syscall number
 		for i := len(call.Args) - 1; i < 4; i++ {
 			// r0-r3 get clobbered after the syscall returns
-			constraints.WriteString(",~{r" + strconv.Itoa(i) + "}")
+			constraints += ",~{r" + strconv.Itoa(i) + "}"
 		}
 		fnType := llvm.FunctionType(b.uintptrType, argTypes, false)
-		target := llvm.InlineAsm(fnType, "svc #0", constraints.String(), true, false, 0, false)
+		target := llvm.InlineAsm(fnType, "svc #0", constraints, true, false, 0, false)
 		return b.CreateCall(fnType, target, args, ""), nil
 
 	case b.GOARCH == "arm64" && b.GOOS == "linux":
@@ -123,32 +120,31 @@ func (b *builder) createRawSyscall(call *ssa.CallCommon) (llvm.Value, error) {
 		argTypes := []llvm.Type{}
 		// Constraints will look something like:
 		//   ={x0},0,{x1},{x2},{x8},~{x3},~{x4},~{x5},~{x6},~{x7},~{x16},~{x17}
-		var constraints strings.Builder
+		constraints := "={x0}"
-		constraints.WriteString("={x0}")
 		for i, arg := range call.Args[1:] {
-			constraints.WriteString("," + [...]string{
+			constraints += "," + [...]string{
 				"0", // tie to output
 				"{x1}",
 				"{x2}",
 				"{x3}",
 				"{x4}",
 				"{x5}",
-			}[i])
+			}[i]
 			llvmValue := b.getValue(arg, getPos(call))
 			args = append(args, llvmValue)
 			argTypes = append(argTypes, llvmValue.Type())
 		}
 		args = append(args, num)
 		argTypes = append(argTypes, b.uintptrType)
-		constraints.WriteString(",{x8}") // syscall number
+		constraints += ",{x8}" // syscall number
 		for i := len(call.Args) - 1; i < 8; i++ {
 			// x0-x7 may get clobbered during the syscall following the aarch64
 			// calling convention.
-			constraints.WriteString(",~{x" + strconv.Itoa(i) + "}")
+			constraints += ",~{x" + strconv.Itoa(i) + "}"
 		}
-		constraints.WriteString(",~{x16},~{x17}") // scratch registers
+		constraints += ",~{x16},~{x17}" // scratch registers
 		fnType := llvm.FunctionType(b.uintptrType, argTypes, false)
-		target := llvm.InlineAsm(fnType, "svc #0", constraints.String(), true, false, 0, false)
+		target := llvm.InlineAsm(fnType, "svc #0", constraints, true, false, 0, false)
 		return b.CreateCall(fnType, target, args, ""), nil
 
 	case (b.GOARCH == "mips" || b.GOARCH == "mipsle") && b.GOOS == "linux":
@@ -167,8 +163,7 @@ func (b *builder) createRawSyscall(call *ssa.CallCommon) (llvm.Value, error) {
 		// faster and smaller code.
 		args := []llvm.Value{num}
 		argTypes := []llvm.Type{b.uintptrType}
-		var constraints strings.Builder
+		constraints := "={$2},={$7},0"
-		constraints.WriteString("={$2},={$7},0")
 		syscallParams := call.Args[1:]
 		if len(syscallParams) > 7 {
 			// There is one syscall that uses 7 parameters: sync_file_range.
@@ -177,7 +172,7 @@ func (b *builder) createRawSyscall(call *ssa.CallCommon) (llvm.Value, error) {
 			syscallParams = syscallParams[:7]
 		}
 		for i, arg := range syscallParams {
-			constraints.WriteString("," + [...]string{
+			constraints += "," + [...]string{
 				"{$4}", // arg1
 				"{$5}", // arg2
 				"{$6}", // arg3
@@ -185,7 +180,7 @@ func (b *builder) createRawSyscall(call *ssa.CallCommon) (llvm.Value, error) {
 				"r",    // arg5 on the stack
 				"r",    // arg6 on the stack
 				"r",    // arg7 on the stack
-			}[i])
+			}[i]
 			llvmValue := b.getValue(arg, getPos(call))
 			args = append(args, llvmValue)
 			argTypes = append(argTypes, llvmValue.Type())
@@ -226,10 +221,10 @@ func (b *builder) createRawSyscall(call *ssa.CallCommon) (llvm.Value, error) {
 				"addu $$sp, $$sp, 32\n" +
 				".set at\n"
 		}
-		constraints.WriteString(",~{$3},~{$4},~{$5},~{$6},~{$8},~{$9},~{$10},~{$11},~{$12},~{$13},~{$14},~{$15},~{$24},~{$25},~{hi},~{lo},~{memory}")
+		constraints += ",~{$3},~{$4},~{$5},~{$6},~{$8},~{$9},~{$10},~{$11},~{$12},~{$13},~{$14},~{$15},~{$24},~{$25},~{hi},~{lo},~{memory}"
 		returnType := b.ctx.StructType([]llvm.Type{b.uintptrType, b.uintptrType}, false)
 		fnType := llvm.FunctionType(returnType, argTypes, false)
-		target := llvm.InlineAsm(fnType, asm, constraints.String(), true, true, 0, false)
+		target := llvm.InlineAsm(fnType, asm, constraints, true, true, 0, false)
 		call := b.CreateCall(fnType, target, args, "")
 		resultCode := b.CreateExtractValue(call, 0, "") // r2
 		errorFlag := b.CreateExtractValue(call, 1, "")  // r7

compiler/testdata/defer-cortex-m-qemu.ll

@@ -3,7 +3,7 @@ source_filename = "defer.go"
 target datalayout = "e-m:e-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64"
 target triple = "thumbv7m-unknown-unknown-eabi"
 
-%runtime.deferFrame = type { ptr, ptr, [0 x ptr], ptr, i8, %runtime._interface, ptr }
+%runtime.deferFrame = type { ptr, ptr, [0 x ptr], ptr, i8, %runtime._interface }
 %runtime._interface = type { ptr, ptr }
 
 ; Function Attrs: nounwind
@@ -18,14 +18,14 @@ declare void @main.external(ptr) #1
 define hidden void @main.deferSimple(ptr %context) unnamed_addr #0 {
 entry:
   %defer.alloca = alloca { i32, ptr }, align 4
+  %deferPtr = alloca ptr, align 4
+  store ptr null, ptr %deferPtr, align 4
   %deferframe.buf = alloca %runtime.deferFrame, align 4
-  %deferPtr = getelementptr inbounds nuw i8, ptr %deferframe.buf, i32 24
   %0 = call ptr @llvm.stacksave.p0()
   call void @runtime.setupDeferFrame(ptr nonnull %deferframe.buf, ptr %0, ptr undef) #4
-  %defer.next = load ptr, ptr %deferPtr, align 4
   store i32 0, ptr %defer.alloca, align 4
   %defer.alloca.repack15 = getelementptr inbounds nuw i8, ptr %defer.alloca, i32 4
-  store ptr %defer.next, ptr %defer.alloca.repack15, align 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
   %setjmp.result = icmp eq i32 %setjmp, 0
@@ -111,9 +111,9 @@ rundefers.end3:                                   ; preds = %rundefers.loophead6
 ; Function Attrs: nocallback nofree nosync nounwind willreturn
 declare ptr @llvm.stacksave.p0() #2
 
-declare void @runtime.setupDeferFrame(ptr dereferenceable_or_null(28), ptr, ptr) #1
+declare void @runtime.setupDeferFrame(ptr dereferenceable_or_null(24), ptr, ptr) #1
 
-declare void @runtime.destroyDeferFrame(ptr dereferenceable_or_null(28), ptr) #1
+declare void @runtime.destroyDeferFrame(ptr dereferenceable_or_null(24), ptr) #1
 
 ; Function Attrs: nounwind
 define internal void @"main.deferSimple$1"(ptr %context) unnamed_addr #0 {
@@ -135,18 +135,18 @@ define hidden void @main.deferMultiple(ptr %context) unnamed_addr #0 {
 entry:
   %defer.alloca2 = alloca { i32, ptr }, align 4
   %defer.alloca = alloca { i32, ptr }, align 4
+  %deferPtr = alloca ptr, align 4
+  store ptr null, ptr %deferPtr, align 4
   %deferframe.buf = alloca %runtime.deferFrame, align 4
-  %deferPtr = getelementptr inbounds nuw i8, ptr %deferframe.buf, i32 24
   %0 = call ptr @llvm.stacksave.p0()
   call void @runtime.setupDeferFrame(ptr nonnull %deferframe.buf, ptr %0, ptr undef) #4
-  %defer.next = load ptr, ptr %deferPtr, align 4
   store i32 0, ptr %defer.alloca, align 4
   %defer.alloca.repack22 = getelementptr inbounds nuw i8, ptr %defer.alloca, i32 4
-  store ptr %defer.next, ptr %defer.alloca.repack22, align 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.repack24 = getelementptr inbounds nuw 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.repack24, align 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
   %setjmp.result = icmp eq i32 %setjmp, 0
@@ -270,8 +270,9 @@ entry:
 ; Function Attrs: nounwind
 define hidden void @main.deferInfiniteLoop(ptr %context) unnamed_addr #0 {
 entry:
+  %deferPtr = alloca ptr, align 4
+  store ptr null, ptr %deferPtr, align 4
   %deferframe.buf = alloca %runtime.deferFrame, align 4
-  %deferPtr = getelementptr inbounds nuw i8, ptr %deferframe.buf, i32 24
   %0 = call ptr @llvm.stacksave.p0()
   call void @runtime.setupDeferFrame(ptr nonnull %deferframe.buf, ptr %0, ptr undef) #4
   br label %for.body
@@ -317,8 +318,9 @@ declare noalias nonnull ptr @runtime.alloc(i32, ptr, ptr) #3
 ; Function Attrs: nounwind
 define hidden void @main.deferLoop(ptr %context) unnamed_addr #0 {
 entry:
+  %deferPtr = alloca ptr, align 4
+  store ptr null, ptr %deferPtr, align 4
   %deferframe.buf = alloca %runtime.deferFrame, align 4
-  %deferPtr = getelementptr inbounds nuw i8, ptr %deferframe.buf, i32 24
   %0 = call ptr @llvm.stacksave.p0()
   call void @runtime.setupDeferFrame(ptr nonnull %deferframe.buf, ptr %0, ptr undef) #4
   br label %for.loop
@@ -406,8 +408,9 @@ rundefers.end1:                                   ; preds = %rundefers.loophead4
 define hidden void @main.deferBetweenLoops(ptr %context) unnamed_addr #0 {
 entry:
   %defer.alloca = alloca { i32, ptr, i32 }, align 4
+  %deferPtr = alloca ptr, align 4
+  store ptr null, ptr %deferPtr, align 4
   %deferframe.buf = alloca %runtime.deferFrame, align 4
-  %deferPtr = getelementptr inbounds nuw i8, ptr %deferframe.buf, i32 24
   %0 = call ptr @llvm.stacksave.p0()
   call void @runtime.setupDeferFrame(ptr nonnull %deferframe.buf, ptr %0, ptr undef) #4
   br label %for.loop

compiler/testdata/gc.ll

@@ -75,7 +75,7 @@ entry:
 define hidden void @main.newStruct(ptr %context) unnamed_addr #1 {
 entry:
   %stackalloc = alloca i8, align 1
-  %new = call align 1 ptr @runtime.alloc_zero(i32 0, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #3
+  %new = call align 1 ptr @runtime.alloc(i32 0, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #3
   call void @runtime.trackPointer(ptr nonnull %new, ptr nonnull %stackalloc, ptr undef) #3
   store ptr %new, ptr @main.struct1, align 4
   %new1 = call align 4 dereferenceable(8) ptr @runtime.alloc(i32 8, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #3
@@ -93,9 +93,6 @@ entry:
   ret void
 }
 
-; Function Attrs: allockind("alloc,zeroed") allocsize(0)
-declare noalias nonnull ptr @runtime.alloc_zero(i32, ptr, ptr) #2
-
 ; Function Attrs: nounwind
 define hidden ptr @main.newFuncValue(ptr %context) unnamed_addr #1 {
 entry:

compiler/testdata/generics.ll

@@ -29,13 +29,13 @@ entry:
   %a = call align 4 dereferenceable(8) ptr @runtime.alloc(i32 8, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #3
   call void @runtime.trackPointer(ptr nonnull %a, ptr nonnull %stackalloc, ptr undef) #3
   store float %a.X, ptr %a, align 4
-  %a.repack5 = getelementptr inbounds nuw i8, ptr %a, i32 4
+  %a.repack9 = getelementptr inbounds nuw i8, ptr %a, i32 4
-  store float %a.Y, ptr %a.repack5, align 4
+  store float %a.Y, ptr %a.repack9, align 4
   %b = call align 4 dereferenceable(8) ptr @runtime.alloc(i32 8, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #3
   call void @runtime.trackPointer(ptr nonnull %b, ptr nonnull %stackalloc, ptr undef) #3
   store float %b.X, ptr %b, align 4
-  %b.repack7 = getelementptr inbounds nuw i8, ptr %b, i32 4
+  %b.repack11 = getelementptr inbounds nuw i8, ptr %b, i32 4
-  store float %b.Y, ptr %b.repack7, align 4
+  store float %b.Y, ptr %b.repack11, align 4
   call void @main.checkSize(i32 4, ptr undef) #3
   call void @main.checkSize(i32 8, ptr undef) #3
   %complit = call align 4 dereferenceable(8) ptr @runtime.alloc(i32 8, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #3
@@ -43,29 +43,29 @@ entry:
   br i1 false, label %deref.throw, label %deref.next
 
 deref.next:                                       ; preds = %entry
-  br i1 false, label %deref.throw, label %deref.next1
+  br i1 false, label %deref.throw1, label %deref.next2
 
-deref.next1:                                      ; preds = %deref.next
+deref.next2:                                      ; preds = %deref.next
   %0 = load float, ptr %a, align 4
   %1 = load float, ptr %b, align 4
   %2 = fadd float %0, %1
-  br i1 false, label %deref.throw, label %deref.next2
+  br i1 false, label %deref.throw3, label %deref.next4
 
-deref.next2:                                      ; preds = %deref.next1
+deref.next4:                                      ; preds = %deref.next2
-  br i1 false, label %deref.throw, label %deref.next3
+  br i1 false, label %deref.throw5, label %deref.next6
 
-deref.next3:                                      ; preds = %deref.next2
+deref.next6:                                      ; preds = %deref.next4
   %3 = getelementptr inbounds nuw i8, ptr %b, i32 4
   %4 = getelementptr inbounds nuw i8, ptr %a, i32 4
   %5 = load float, ptr %4, align 4
   %6 = load float, ptr %3, align 4
-  br i1 false, label %deref.throw, label %store.next
+  br i1 false, label %store.throw, label %store.next
 
-store.next:                                       ; preds = %deref.next3
+store.next:                                       ; preds = %deref.next6
   store float %2, ptr %complit, align 4
-  br i1 false, label %deref.throw, label %store.next4
+  br i1 false, label %store.throw7, label %store.next8
 
-store.next4:                                      ; preds = %store.next
+store.next8:                                      ; preds = %store.next
   %7 = getelementptr inbounds nuw i8, ptr %complit, i32 4
   %8 = fadd float %5, %6
   store float %8, ptr %7, align 4
@@ -74,7 +74,22 @@ store.next4:                                      ; preds = %store.next
   %10 = insertvalue %"main.Point[float32]" %9, float %8, 1
   ret %"main.Point[float32]" %10
 
-deref.throw:                                      ; preds = %store.next, %deref.next3, %deref.next2, %deref.next1, %deref.next, %entry
+deref.throw:                                      ; preds = %entry
+  unreachable
+
+deref.throw1:                                     ; preds = %deref.next
+  unreachable
+
+deref.throw3:                                     ; preds = %deref.next2
+  unreachable
+
+deref.throw5:                                     ; preds = %deref.next4
+  unreachable
+
+store.throw:                                      ; preds = %deref.next6
+  unreachable
+
+store.throw7:                                     ; preds = %store.next
   unreachable
 }
 
@@ -92,13 +107,13 @@ entry:
   %a = call align 4 dereferenceable(8) ptr @runtime.alloc(i32 8, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #3
   call void @runtime.trackPointer(ptr nonnull %a, ptr nonnull %stackalloc, ptr undef) #3
   store i32 %a.X, ptr %a, align 4
-  %a.repack5 = getelementptr inbounds nuw i8, ptr %a, i32 4
+  %a.repack9 = getelementptr inbounds nuw i8, ptr %a, i32 4
-  store i32 %a.Y, ptr %a.repack5, align 4
+  store i32 %a.Y, ptr %a.repack9, align 4
   %b = call align 4 dereferenceable(8) ptr @runtime.alloc(i32 8, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #3
   call void @runtime.trackPointer(ptr nonnull %b, ptr nonnull %stackalloc, ptr undef) #3
   store i32 %b.X, ptr %b, align 4
-  %b.repack7 = getelementptr inbounds nuw i8, ptr %b, i32 4
+  %b.repack11 = getelementptr inbounds nuw i8, ptr %b, i32 4
-  store i32 %b.Y, ptr %b.repack7, align 4
+  store i32 %b.Y, ptr %b.repack11, align 4
   call void @main.checkSize(i32 4, ptr undef) #3
   call void @main.checkSize(i32 8, ptr undef) #3
   %complit = call align 4 dereferenceable(8) ptr @runtime.alloc(i32 8, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #3
@@ -106,29 +121,29 @@ entry:
   br i1 false, label %deref.throw, label %deref.next
 
 deref.next:                                       ; preds = %entry
-  br i1 false, label %deref.throw, label %deref.next1
+  br i1 false, label %deref.throw1, label %deref.next2
 
-deref.next1:                                      ; preds = %deref.next
+deref.next2:                                      ; preds = %deref.next
   %0 = load i32, ptr %a, align 4
   %1 = load i32, ptr %b, align 4
   %2 = add i32 %0, %1
-  br i1 false, label %deref.throw, label %deref.next2
+  br i1 false, label %deref.throw3, label %deref.next4
 
-deref.next2:                                      ; preds = %deref.next1
+deref.next4:                                      ; preds = %deref.next2
-  br i1 false, label %deref.throw, label %deref.next3
+  br i1 false, label %deref.throw5, label %deref.next6
 
-deref.next3:                                      ; preds = %deref.next2
+deref.next6:                                      ; preds = %deref.next4
   %3 = getelementptr inbounds nuw i8, ptr %b, i32 4
   %4 = getelementptr inbounds nuw i8, ptr %a, i32 4
   %5 = load i32, ptr %4, align 4
   %6 = load i32, ptr %3, align 4
-  br i1 false, label %deref.throw, label %store.next
+  br i1 false, label %store.throw, label %store.next
 
-store.next:                                       ; preds = %deref.next3
+store.next:                                       ; preds = %deref.next6
   store i32 %2, ptr %complit, align 4
-  br i1 false, label %deref.throw, label %store.next4
+  br i1 false, label %store.throw7, label %store.next8
 
-store.next4:                                      ; preds = %store.next
+store.next8:                                      ; preds = %store.next
   %7 = getelementptr inbounds nuw i8, ptr %complit, i32 4
   %8 = add i32 %5, %6
   store i32 %8, ptr %7, align 4
@@ -137,7 +152,22 @@ store.next4:                                      ; preds = %store.next
   %10 = insertvalue %"main.Point[int]" %9, i32 %8, 1
   ret %"main.Point[int]" %10
 
-deref.throw:                                      ; preds = %store.next, %deref.next3, %deref.next2, %deref.next1, %deref.next, %entry
+deref.throw:                                      ; preds = %entry
+  unreachable
+
+deref.throw1:                                     ; preds = %deref.next
+  unreachable
+
+deref.throw3:                                     ; preds = %deref.next2
+  unreachable
+
+deref.throw5:                                     ; preds = %deref.next4
+  unreachable
+
+store.throw:                                      ; preds = %deref.next6
+  unreachable
+
+store.throw7:                                     ; preds = %store.next
   unreachable
 }
 

compiler/testdata/pragma.go

@@ -120,31 +120,3 @@ func stillEscapes(a *int, b []int, c chan int, d *[0]byte) {
 func doesHeapAlloc() *int {
 	return new(int)
 }
-
-// Define a function in a different package using a file-level go:linkname.
-// (Same as withLinkageName1, but with the //go:linkname directive detached
-// from the function declaration — see https://github.com/tinygo-org/tinygo/issues/4395)
-func withFileLevelLinkageName1() {
-}
-
-// Import a function from a different package using a file-level go:linkname.
-// (Same as withLinkageName2, but with the //go:linkname directive detached
-// from the function declaration.)
-func withFileLevelLinkageName2()
-
-//go:linkname withFileLevelLinkageName1 somepkg.someFileLevelFunction1
-//go:linkname withFileLevelLinkageName2 somepkg.someFileLevelFunction2
-
-// File-level linkname directives can also appear between two function
-// declarations, in which case Go's AST attaches them as the doc comment
-// of the following function — even when the directive's localname refers
-// to a different function. Exercise that case: the directive below names
-// withAdjacentLinkageName, but Go will attach it to
-// sentinelAfterAdjacentLinkname's Doc. The file-level scan must find it
-// by walking comment groups regardless of which decl they're attached to.
-func withAdjacentLinkageName() {
-}
-
-//go:linkname withAdjacentLinkageName somepkg.someAdjacentFunction
-func sentinelAfterAdjacentLinkname() {
-}

compiler/testdata/pragma.ll

@@ -102,26 +102,6 @@ entry:
 ; Function Attrs: allockind("alloc,zeroed") allocsize(0)
 declare noalias nonnull ptr @runtime.alloc_noheap(i32, ptr, ptr) #9
 
-; Function Attrs: nounwind
-define hidden void @somepkg.someFileLevelFunction1(ptr %context) unnamed_addr #1 {
-entry:
-  ret void
-}
-
-declare void @somepkg.someFileLevelFunction2(ptr) #0
-
-; Function Attrs: nounwind
-define hidden void @somepkg.someAdjacentFunction(ptr %context) unnamed_addr #1 {
-entry:
-  ret void
-}
-
-; Function Attrs: nounwind
-define hidden void @main.sentinelAfterAdjacentLinkname(ptr %context) unnamed_addr #1 {
-entry:
-  ret void
-}
-
 attributes #0 = { "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
 attributes #1 = { nounwind "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" "wasm-export-name"="extern_func" }

corpus_test.go

@@ -59,6 +59,7 @@ func TestCorpus(t *testing.T) {
 	}
 
 	for _, repo := range repos {
+		repo := repo
 		name := repo.Repo
 		if repo.Tags != "" {
 			name += "(" + strings.ReplaceAll(repo.Tags, " ", "-") + ")"
@@ -131,6 +132,7 @@ func TestCorpus(t *testing.T) {
 			}
 
 			for _, dir := range repo.Subdirs {
+				dir := dir
 				t.Run(dir.Pkg, func(t *testing.T) {
 					t.Parallel()
 

diff.go

@@ -116,7 +116,10 @@ func Diff(oldName string, old []byte, newName string, new []byte) []byte {
 
 		// End chunk with common lines for context.
 		if len(ctext) > 0 {
-			n := min(end.x-start.x, C)
+			n := end.x - start.x
+			if n > C {
+				n = C
+			}
 			for _, s := range x[start.x : start.x+n] {
 				ctext = append(ctext, " "+s)
 				count.x++
@@ -231,7 +234,7 @@ func tgs(x, y []string) []pair {
 	for i := range T {
 		T[i] = n + 1
 	}
-	for i := range n {
+	for i := 0; i < n; i++ {
 		k := sort.Search(n, func(k int) bool {
 			return T[k] >= J[i]
 		})

errors_test.go

@@ -136,7 +136,7 @@ func readErrorMessages(t *testing.T, file string) string {
 	}
 
 	var errors []string
-	for line := range strings.SplitSeq(string(data), "\n") {
+	for _, line := range strings.Split(string(data), "\n") {
 		if strings.HasPrefix(line, "// ERROR: ") {
 			errors = append(errors, strings.TrimRight(line[len("// ERROR: "):], "\r\n"))
 		}

go.mod

@@ -1,6 +1,6 @@
 module github.com/tinygo-org/tinygo
 
-go 1.24.0
+go 1.23.0
 
 require (
 	github.com/aykevl/go-wasm v0.0.2-0.20250317121156-42b86c494139
@@ -18,11 +18,11 @@ require (
 	go.bug.st/serial v1.6.4
 	go.bytecodealliance.org v0.6.2
 	go.bytecodealliance.org/cm v0.2.2
-	golang.org/x/net v0.50.0
+	golang.org/x/net v0.35.0
-	golang.org/x/sys v0.41.0
+	golang.org/x/sys v0.30.0
-	golang.org/x/tools v0.42.0
+	golang.org/x/tools v0.30.0
 	gopkg.in/yaml.v2 v2.4.0
-	tinygo.org/x/espflasher v0.6.1
+	tinygo.org/x/espflasher v0.6.0
 	tinygo.org/x/go-llvm v0.0.0-20260422095634-06c6725fe5e6
 )
 
@@ -48,6 +48,6 @@ require (
 	github.com/spf13/afero v1.11.0 // indirect
 	github.com/ulikunitz/xz v0.5.12 // indirect
 	github.com/urfave/cli/v3 v3.0.0-beta1 // indirect
-	golang.org/x/mod v0.33.0 // indirect
+	golang.org/x/mod v0.23.0 // indirect
-	golang.org/x/text v0.34.0 // indirect
+	golang.org/x/text v0.22.0 // indirect
 )

go.sum

@@ -23,8 +23,6 @@ github.com/gofrs/flock v0.8.1 h1:+gYjHKf32LDeiEEFhQaotPbLuUXjY5ZqxKgXy7n59aw=
 github.com/gofrs/flock v0.8.1/go.mod h1:F1TvTiK9OcQqauNUHlbJvyl9Qa1QvF/gOUDKA14jxHU=
 github.com/golangci/misspell v0.6.0 h1:JCle2HUTNWirNlDIAUO44hUsKhOFqGPoC4LZxlaSXDs=
 github.com/golangci/misspell v0.6.0/go.mod h1:keMNyY6R9isGaSAu+4Q8NMBwMPkh15Gtc8UCVoDtAWo=
-github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
-github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 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/hashicorp/go-version v1.7.0 h1:5tqGy27NaOTB8yJKUZELlFAS/LTKJkrmONwQKeRZfjY=
@@ -95,24 +93,24 @@ go.bytecodealliance.org v0.6.2 h1:Jy4u5DVmSkXgsnwojBhJ+AD/YsJsR3VzVnxF0xRCqTQ=
 go.bytecodealliance.org v0.6.2/go.mod h1:gqjTJm0y9NSksG4py/lSjIQ/SNuIlOQ+hCIEPQwtJgA=
 go.bytecodealliance.org/cm v0.2.2 h1:M9iHS6qs884mbQbIjtLX1OifgyPG9DuMs2iwz8G4WQA=
 go.bytecodealliance.org/cm v0.2.2/go.mod h1:JD5vtVNZv7sBoQQkvBvAAVKJPhR/bqBH7yYXTItMfZI=
-golang.org/x/mod v0.33.0 h1:tHFzIWbBifEmbwtGz65eaWyGiGZatSrT9prnU8DbVL8=
+golang.org/x/mod v0.23.0 h1:Zb7khfcRGKk+kqfxFaP5tZqCnDZMjC5VtUBs87Hr6QM=
-golang.org/x/mod v0.33.0/go.mod h1:swjeQEj+6r7fODbD2cqrnje9PnziFuw4bmLbBZFrQ5w=
+golang.org/x/mod v0.23.0/go.mod h1:6SkKJ3Xj0I0BrPOZoBy3bdMptDDU9oJrpohJ3eWZ1fY=
-golang.org/x/net v0.50.0 h1:ucWh9eiCGyDR3vtzso0WMQinm2Dnt8cFMuQa9K33J60=
+golang.org/x/net v0.35.0 h1:T5GQRQb2y08kTAByq9L4/bz8cipCdA8FbRTXewonqY8=
-golang.org/x/net v0.50.0/go.mod h1:UgoSli3F/pBgdJBHCTc+tp3gmrU4XswgGRgtnwWTfyM=
+golang.org/x/net v0.35.0/go.mod h1:EglIi67kWsHKlRzzVMUD93VMSWGFOMSZgxFjparz1Qk=
-golang.org/x/sync v0.19.0 h1:vV+1eWNmZ5geRlYjzm2adRgW2/mcpevXNg50YZtPCE4=
+golang.org/x/sync v0.11.0 h1:GGz8+XQP4FvTTrjZPzNKTMFtSXH80RAzG+5ghFPgK9w=
-golang.org/x/sync v0.19.0/go.mod h1:9KTHXmSnoGruLpwFjVSX0lNNA75CykiMECbovNTZqGI=
+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 v0.0.0-20220715151400-c0bba94af5f8/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 v0.41.0 h1:Ivj+2Cp/ylzLiEU89QhWblYnOE9zerudt9Ftecq2C6k=
+golang.org/x/sys v0.30.0 h1:QjkSwP/36a20jFYWkSue1YwXzLmsV5Gfq7Eiy72C1uc=
-golang.org/x/sys v0.41.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
+golang.org/x/sys v0.30.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
-golang.org/x/text v0.34.0 h1:oL/Qq0Kdaqxa1KbNeMKwQq0reLCCaFtqu2eNuSeNHbk=
+golang.org/x/text v0.22.0 h1:bofq7m3/HAFvbF51jz3Q9wLg3jkvSPuiZu/pD1XwgtM=
-golang.org/x/text v0.34.0/go.mod h1:homfLqTYRFyVYemLBFl5GgL/DWEiH5wcsQ5gSh1yziA=
+golang.org/x/text v0.22.0/go.mod h1:YRoo4H8PVmsu+E3Ou7cqLVH8oXWIHVoX0jqUWALQhfY=
-golang.org/x/tools v0.42.0 h1:uNgphsn75Tdz5Ji2q36v/nsFSfR/9BRFvqhGBaJGd5k=
+golang.org/x/tools v0.30.0 h1:BgcpHewrV5AUp2G9MebG4XPFI1E2W41zU1SaqVA9vJY=
-golang.org/x/tools v0.42.0/go.mod h1:Ma6lCIwGZvHK6XtgbswSoWroEkhugApmsXyrUmBhfr0=
+golang.org/x/tools v0.30.0/go.mod h1:c347cR/OJfw5TI+GfX7RUPNMdDRRbjvYTS0jPyvsVtY=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
@@ -120,7 +118,7 @@ gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
-tinygo.org/x/espflasher v0.6.1 h1:9jfyAP9jGjxF63FQUY2Bml9TFb5fCZYxVgbgR2IjUGs=
+tinygo.org/x/espflasher v0.6.0 h1:CHbGMHAIWq1tB8FKd/QwBpNFw1jvHHxpmvZiF+QOYUo=
-tinygo.org/x/espflasher v0.6.1/go.mod h1:tr5u08HoE67WD5zxJesCiiVF/R1b6Akz3yXwh5zah8U=
+tinygo.org/x/espflasher v0.6.0/go.mod h1:tr5u08HoE67WD5zxJesCiiVF/R1b6Akz3yXwh5zah8U=
 tinygo.org/x/go-llvm v0.0.0-20260422095634-06c6725fe5e6 h1:QSnqFgNV2Ij0T4hM2qKv53fcDAFElxClPjVUZXzYkWU=
 tinygo.org/x/go-llvm v0.0.0-20260422095634-06c6725fe5e6/go.mod h1:GFbusT2VTA4I+l4j80b17KFK+6whv69Wtny5U+T8RR0=

goenv/goenv.go

@@ -151,8 +151,6 @@ func Get(name string) string {
 			panic("could not find cache dir: " + err.Error())
 		}
 		return filepath.Join(dir, "tinygo")
-	case "CGO_CFLAGS":
-		return os.Getenv("CGO_CFLAGS")
 	case "CGO_ENABLED":
 		// Always enable CGo. It is required by a number of targets, including
 		// macOS and the rp2040.

interp/compiler.go

@@ -151,7 +151,7 @@ func (r *runner) compileFunction(llvmFn llvm.Value) *function {
 			case llvm.PHI:
 				inst.name = llvmInst.Name()
 				incomingCount := inst.llvmInst.IncomingCount()
-				for i := range incomingCount {
+				for i := 0; i < incomingCount; i++ {
 					incomingBB := inst.llvmInst.IncomingBlock(i)
 					incomingValue := inst.llvmInst.IncomingValue(i)
 					inst.operands = append(inst.operands,

interp/interp_test.go

@@ -18,10 +18,9 @@ func TestInterp(t *testing.T) {
 		"copy",
 		"interface",
 		"revert",
-		"store",
 		"alloc",
-		"slicedata",
 	} {
+		name := name // make local to this closure
 		t.Run(name, func(t *testing.T) {
 			t.Parallel()
 			runTest(t, "testdata/"+name)

interp/interpreter.go

@@ -5,7 +5,6 @@ import (
 	"fmt"
 	"math"
 	"os"
-	"slices"
 	"strconv"
 	"strings"
 	"time"
@@ -300,7 +299,7 @@ func (r *runner) run(fn *function, params []value, parentMem *memoryView, indent
 				// means that monotonic time in the time package is counted from
 				// time.Time{}.Sub(1), which should be fine.
 				locals[inst.localIndex] = literalValue{uint64(0)}
-			case callFn.name == "runtime.alloc" || callFn.name == "runtime.alloc_noheap" || callFn.name == "runtime.alloc_zero":
+			case callFn.name == "runtime.alloc" || callFn.name == "runtime.alloc_noheap":
 				// Allocate heap memory. At compile time, this is instead done
 				// by creating a global variable.
 
@@ -471,7 +470,7 @@ func (r *runner) run(fn *function, params []value, parentMem *memoryView, indent
 				// should be returned.
 				numMethods := int(r.builder.CreateExtractValue(methodSet, 0, "").ZExtValue())
 				var method llvm.Value
-				for i := range numMethods {
+				for i := 0; i < numMethods; i++ {
 					methodSignatureAgg := r.builder.CreateExtractValue(methodSet, 1, "")
 					methodSignature := r.builder.CreateExtractValue(methodSignatureAgg, i, "")
 					if methodSignature == signature {
@@ -908,7 +907,7 @@ func (r *runner) interpretICmp(lhs, rhs value, predicate llvm.IntPredicate) bool
 func (r *runner) runAtRuntime(fn *function, inst instruction, locals []value, mem *memoryView, indent string) *Error {
 	numOperands := inst.llvmInst.OperandsCount()
 	operands := make([]llvm.Value, numOperands)
-	for i := range numOperands {
+	for i := 0; i < numOperands; i++ {
 		operand := inst.llvmInst.Operand(i)
 		if !operand.IsAInstruction().IsNil() || !operand.IsAArgument().IsNil() {
 			var err error
@@ -986,9 +985,9 @@ func (r *runner) runAtRuntime(fn *function, inst instruction, locals []value, me
 			mem.instructions = append(mem.instructions, agg)
 		}
 		result = operands[1]
-		for i, indice := range slices.Backward(indices) {
+		for i := len(indices) - 1; i >= 0; i-- {
 			agg := aggregates[i]
-			result = r.builder.CreateInsertValue(agg, result, int(indice), inst.name+".insertvalue"+strconv.Itoa(i))
+			result = r.builder.CreateInsertValue(agg, result, int(indices[i]), inst.name+".insertvalue"+strconv.Itoa(i))
 			if i != 0 { // don't add last result to mem.instructions as it will be done at the end already
 				mem.instructions = append(mem.instructions, result)
 			}

interp/memory.go

@@ -18,10 +18,8 @@ import (
 	"encoding/binary"
 	"errors"
 	"fmt"
-	"maps"
 	"math"
 	"math/big"
-	"slices"
 	"strconv"
 	"strings"
 
@@ -82,7 +80,9 @@ func (mv *memoryView) extend(sub memoryView) {
 	if mv.objects == nil && len(sub.objects) != 0 {
 		mv.objects = make(map[uint32]object)
 	}
-	maps.Copy(mv.objects, sub.objects)
+	for key, value := range sub.objects {
+		mv.objects[key] = value
+	}
 	mv.instructions = append(mv.instructions, sub.instructions...)
 }
 
@@ -90,8 +90,8 @@ func (mv *memoryView) extend(sub memoryView) {
 // created in this memoryView. Do not reuse this memoryView.
 func (mv *memoryView) revert() {
 	// Erase instructions in reverse order.
-	for _, llvmInst := range slices.Backward(mv.instructions) {
+	for i := len(mv.instructions) - 1; i >= 0; i-- {
-
+		llvmInst := mv.instructions[i]
 		if llvmInst.IsAInstruction().IsNil() {
 			// The IR builder will try to create constant versions of
 			// instructions whenever possible. If it does this, it's not an
@@ -172,7 +172,7 @@ func (mv *memoryView) markExternal(llvmValue llvm.Value, mark uint8) error {
 							continue
 						}
 						numOperands := inst.OperandsCount()
-						for i := range numOperands {
+						for i := 0; i < numOperands; i++ {
 							// Using mark '2' (which means read/write access)
 							// because this might be a store instruction.
 							err := mv.markExternal(inst.Operand(i), 2)
@@ -215,7 +215,7 @@ func (mv *memoryView) markExternal(llvmValue llvm.Value, mark uint8) error {
 			// need any marking.
 		case llvm.StructTypeKind:
 			numElements := llvmType.StructElementTypesCount()
-			for i := range numElements {
+			for i := 0; i < numElements; i++ {
 				element := mv.r.builder.CreateExtractValue(llvmValue, i, "")
 				err := mv.markExternal(element, mark)
 				if err != nil {
@@ -224,7 +224,7 @@ func (mv *memoryView) markExternal(llvmValue llvm.Value, mark uint8) error {
 			}
 		case llvm.ArrayTypeKind:
 			numElements := llvmType.ArrayLength()
-			for i := range numElements {
+			for i := 0; i < numElements; i++ {
 				element := mv.r.builder.CreateExtractValue(llvmValue, i, "")
 				err := mv.markExternal(element, mark)
 				if err != nil {
@@ -299,8 +299,7 @@ func (mv *memoryView) put(index uint32, obj object) {
 }
 
 // Load the value behind the given pointer. Returns nil if the pointer points to
-// an external global or if the load is out of bounds of the object (in which
+// an external global.
-// case the caller defers the load to runtime).
 func (mv *memoryView) load(p pointerValue, size uint32) value {
 	if checks && mv.hasExternalStore(p) {
 		panic("interp: load from object with external store")
@@ -313,23 +312,14 @@ func (mv *memoryView) load(p pointerValue, size uint32) value {
 	if p.offset() == 0 && size == obj.size {
 		return obj.buffer.clone()
 	}
-	if p.offset()+size > obj.size {
+	if checks && p.offset()+size > obj.size {
-		// The load is out of bounds of the object. This can happen for valid
+		panic("interp: load out of bounds")
-		// Go programs, for example when dereferencing the pointer returned by
-		// unsafe.SliceData on a zero-capacity slice (which points to a
-		// zero-sized object). Return nil so the caller defers this load to
-		// runtime instead of crashing the compiler.
-		return nil
 	}
 	v := obj.buffer.asRawValue(mv.r)
-	loadedBuf := v.buf[p.offset() : p.offset()+size]
+	loadedValue := rawValue{
-	if _, writable := mv.objects[p.index()]; writable {
+		buf: v.buf[p.offset() : p.offset()+size],
-		// This object's buffer is owned by this view, which means a later
-		// store may mutate it in place (see store below). Copy the loaded
-		// slice so the returned value is not aliased with the live buffer.
-		loadedBuf = append([]uint64(nil), loadedBuf...)
 	}
-	return rawValue{buf: loadedBuf}
+	return loadedValue
 }
 
 // Store to the value behind the given pointer. This overwrites the value in the
@@ -340,37 +330,26 @@ func (mv *memoryView) store(v value, p pointerValue) bool {
 	if checks && mv.hasExternalLoadOrStore(p) {
 		panic("interp: store to object with external load/store")
 	}
-	index := p.index()
+	obj := mv.get(p.index())
-	var obj object
-	writable := false
-	if mv.objects != nil {
-		obj, writable = mv.objects[index]
-	}
-	if !writable {
-		obj = mv.get(index)
-	}
 	if obj.buffer == nil {
 		// External global, return false (for a failure).
 		return false
 	}
-	valueLen := v.len(mv.r)
+	if checks && p.offset()+v.len(mv.r) > obj.size {
-	if checks && p.offset()+valueLen > obj.size {
 		panic("interp: store out of bounds")
 	}
-	if p.offset() == 0 && valueLen == obj.buffer.len(mv.r) {
+	if p.offset() == 0 && v.len(mv.r) == obj.buffer.len(mv.r) {
-		obj.buffer = v.clone()
+		obj.buffer = v
 	} else {
-		if !writable {
 		obj = obj.clone()
-		}
 		buffer := obj.buffer.asRawValue(mv.r)
 		obj.buffer = buffer
 		v := v.asRawValue(mv.r)
-		for i := range valueLen {
+		for i := uint32(0); i < v.len(mv.r); i++ {
 			buffer.buf[p.offset()+i] = v.buf[i]
 		}
 	}
-	mv.put(index, obj)
+	mv.put(p.index(), obj)
 	return true // success
 }
 
@@ -392,7 +371,7 @@ type value interface {
 // literalValue contains simple integer values that don't need to be stored in a
 // buffer.
 type literalValue struct {
-	value any
+	value interface{}
 }
 
 // Make a literalValue given the number of bits.
@@ -1015,7 +994,7 @@ func (v *rawValue) set(llvmValue llvm.Value, r *runner) {
 		if err != nil {
 			panic(err)
 		}
-		for i := range ptrSize {
+		for i := uint32(0); i < ptrSize; i++ {
 			v.buf[i] = ptr.pointer
 		}
 	} else if !llvmValue.IsAConstantExpr().IsNil() {
@@ -1056,7 +1035,7 @@ func (v *rawValue) set(llvmValue llvm.Value, r *runner) {
 				panic(err)
 			}
 			ptrValue.pointer += totalOffset
-			for i := range ptrSize {
+			for i := uint32(0); i < ptrSize; i++ {
 				v.buf[i] = ptrValue.pointer
 			}
 		case llvm.ICmp:
@@ -1113,7 +1092,7 @@ func (v *rawValue) set(llvmValue llvm.Value, r *runner) {
 			}
 		case llvm.StructTypeKind:
 			numElements := llvmType.StructElementTypesCount()
-			for i := range numElements {
+			for i := 0; i < numElements; i++ {
 				offset := r.targetData.ElementOffset(llvmType, i)
 				field := rawValue{
 					buf: v.buf[offset:],
@@ -1124,7 +1103,7 @@ func (v *rawValue) set(llvmValue llvm.Value, r *runner) {
 			numElements := llvmType.ArrayLength()
 			childType := llvmType.ElementType()
 			childTypeSize := r.targetData.TypeAllocSize(childType)
-			for i := range numElements {
+			for i := 0; i < numElements; i++ {
 				offset := i * int(childTypeSize)
 				field := rawValue{
 					buf: v.buf[offset:],

interp/testdata/slicedata.ll

@@ -1,23 +0,0 @@
-target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
-target triple = "x86_64--linux"
-
-; Reproduction of https://github.com/tinygo-org/tinygo/issues/4214.
-; Dereferencing the pointer returned by unsafe.SliceData on a zero-capacity
-; slice produces a load that is out of bounds of a zero-sized object. The
-; interp must defer this load to runtime instead of crashing the compiler.
-
-@main.zeroSized = global {} zeroinitializer
-@main.v = global i64 0
-
-define void @runtime.initAll() unnamed_addr {
-entry:
-  call void @main.init(ptr undef)
-  ret void
-}
-
-define internal void @main.init(ptr %context) unnamed_addr {
-entry:
-  %val = load i64, ptr @main.zeroSized
-  store i64 %val, ptr @main.v
-  ret void
-}

interp/testdata/slicedata.out.ll

@@ -1,12 +0,0 @@
-target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
-target triple = "x86_64--linux"
-
-@main.zeroSized = local_unnamed_addr global {} zeroinitializer
-@main.v = local_unnamed_addr global i64 0
-
-define void @runtime.initAll() unnamed_addr {
-entry:
-  %val = load i64, ptr @main.zeroSized, align 8
-  store i64 %val, ptr @main.v, align 8
-  ret void
-}

interp/testdata/store.ll

@@ -1,49 +0,0 @@
-target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
-target triple = "x86_64--linux"
-
-@overlap.buf = global [4 x i8] c"\01\02\03\04"
-@alias.src = global [4 x i8] c"\05\06\07\08"
-@alias.dst = global [2 x i8] zeroinitializer
-@reload.buf = global [4 x i8] c"\01\02\03\04"
-@reload.out = global [2 x i8] zeroinitializer
-
-define void @runtime.initAll() unnamed_addr {
-entry:
-  call void @overlap.init(ptr undef)
-  call void @alias.init(ptr undef)
-  call void @reload.init(ptr undef)
-  ret void
-}
-
-define internal void @overlap.init(ptr %context) unnamed_addr {
-entry:
-  %tail = getelementptr [4 x i8], ptr @overlap.buf, i32 0, i32 3
-  store i8 9, ptr %tail
-  %val = load i16, ptr @overlap.buf
-  %dst = getelementptr [4 x i8], ptr @overlap.buf, i32 0, i32 1
-  store i16 %val, ptr %dst
-  ret void
-}
-
-define internal void @alias.init(ptr %context) unnamed_addr {
-entry:
-  %src = getelementptr [4 x i8], ptr @alias.src, i32 0, i32 1
-  %val = load i16, ptr %src
-  store i16 %val, ptr @alias.dst
-  store i8 9, ptr @alias.dst
-  ret void
-}
-
-define internal void @reload.init(ptr %context) unnamed_addr {
-entry:
-  ; First store makes reload.buf writable in the current memory view.
-  %tail = getelementptr [4 x i8], ptr @reload.buf, i32 0, i32 3
-  store i8 9, ptr %tail
-  ; Partial load whose result may share the underlying buffer.
-  %val = load i16, ptr @reload.buf
-  ; Subsequent in-place partial store; this must not corrupt %val.
-  store i8 99, ptr @reload.buf
-  ; Write the originally-loaded value to a separate global.
-  store i16 %val, ptr @reload.out
-  ret void
-}

interp/testdata/store.out.ll

@@ -1,13 +0,0 @@
-target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
-target triple = "x86_64--linux"
-
-@overlap.buf = local_unnamed_addr global [4 x i8] c"\01\01\02\09"
-@alias.src = local_unnamed_addr global [4 x i8] c"\05\06\07\08"
-@alias.dst = local_unnamed_addr global [2 x i8] c"\09\07"
-@reload.buf = local_unnamed_addr global [4 x i8] c"c\02\03\09"
-@reload.out = local_unnamed_addr global [2 x i8] c"\01\02"
-
-define void @runtime.initAll() unnamed_addr {
-entry:
-  ret void
-}

loader/goroot.go

@@ -246,7 +246,6 @@ func pathsToOverride(goMinor int, needsSyscallPackage bool) map[string]bool {
 		"internal/futex/":             false,
 		"internal/fuzz/":              false,
 		"internal/itoa/":              false,
-		"internal/poll/":              false,
 		"internal/reflectlite/":       false,
 		"internal/gclayout":           false,
 		"internal/task/":              false,

loader/loader.go

@@ -22,12 +22,13 @@ import (
 	"strings"
 	"unicode"
 
-	"github.com/google/shlex"
 	"github.com/tinygo-org/tinygo/cgo"
 	"github.com/tinygo-org/tinygo/compileopts"
 	"github.com/tinygo-org/tinygo/goenv"
 )
 
+var initFileVersions = func(info *types.Info) {}
+
 // Program holds all packages and some metadata about the program as a whole.
 type Program struct {
 	config      *compileopts.Config
@@ -434,7 +435,7 @@ func (p *Package) Check() error {
 		}
 		checker.GoVersion = fmt.Sprintf("go%d.%d", major, minor)
 	}
-	p.info.FileVersions = make(map[*ast.File]string)
+	initFileVersions(&p.info)
 
 	// Do typechecking of the package.
 	packageName := p.ImportPath
@@ -484,7 +485,7 @@ func (p *Package) parseFiles() ([]*ast.File, error) {
 		if !filepath.IsAbs(file) {
 			file = filepath.Join(p.Dir, file)
 		}
-		f, err := p.parseFile(file, parser.ParseComments|parser.SkipObjectResolution)
+		f, err := p.parseFile(file, parser.ParseComments)
 		if err != nil {
 			fileErrs = append(fileErrs, err)
 			return
@@ -507,11 +508,6 @@ func (p *Package) parseFiles() ([]*ast.File, error) {
 		var initialCFlags []string
 		initialCFlags = append(initialCFlags, p.program.config.CFlags(true)...)
 		initialCFlags = append(initialCFlags, "-I"+p.Dir)
-		cgoCFlags, err := shlex.Split(goenv.Get("CGO_CFLAGS"))
-		if err != nil {
-			return nil, fmt.Errorf("failed to split CGO_CFLAGS: %w", err)
-		}
-		initialCFlags = append(initialCFlags, cgoCFlags...)
 		generated, headerCode, cflags, ldflags, accessedFiles, errs := cgo.Process(files, p.program.workingDir, p.ImportPath, p.program.fset, initialCFlags, p.program.config.GOOS())
 		p.CFlags = append(initialCFlags, cflags...)
 		p.CGoHeaders = headerCode

loader/loader_go122.go

@@ -0,0 +1,17 @@
+//go:build go1.22
+
+// types.Info.FileVersions was added in Go 1.22, so we can only initialize it
+// when built with Go 1.22.
+
+package loader
+
+import (
+	"go/ast"
+	"go/types"
+)
+
+func init() {
+	initFileVersions = func(info *types.Info) {
+		info.FileVersions = make(map[*ast.File]string)
+	}
+}

main.go

@@ -209,8 +209,6 @@ func Build(pkgName, outpath string, config *compileopts.Config) error {
 // Test runs the tests in the given package. Returns whether the test passed and
 // possibly an error if the test failed to run.
 func Test(pkgName string, stdout, stderr io.Writer, options *compileopts.Options, outpath string) (bool, error) {
-	optionsCopy := *options
-	options = &optionsCopy
 	options.TestConfig.CompileTestBinary = true
 	config, err := builder.NewConfig(options)
 	if err != nil {
@@ -397,7 +395,7 @@ func Flash(pkgName, port, outpath string, options *compileopts.Options) error {
 		fileExt = filepath.Ext(config.Target.FlashFilename)
 	case "openocd":
 		fileExt = ".hex"
-	case "bmp", "probe-rs":
+	case "bmp":
 		fileExt = ".elf"
 	case "adb":
 		fileExt = ".hex"
@@ -537,16 +535,6 @@ func Flash(pkgName, port, outpath string, options *compileopts.Options) error {
 		if err != nil {
 			return &commandError{"failed to flash", result.Binary, err}
 		}
-	case "probe-rs":
-		// TODO: this halts the target after flashing.
-		// See: https://github.com/probe-rs/probe-rs/discussions/4005
-		cmd := executeCommand(config.Options, "probe-rs", "download", "--chip="+config.Target.ProbeRSChip, "--verify", result.Binary)
-		cmd.Stdout = os.Stdout
-		cmd.Stderr = os.Stderr
-		err = cmd.Run()
-		if err != nil {
-			return &commandError{"failed to flash", result.Binary, err}
-		}
 	case "adb":
 		// Run pre-flash adb shell commands.
 		for _, preCmd := range config.Target.ADBPreCommands {
@@ -709,21 +697,6 @@ func Debug(debugger, pkgName string, ocdOutput bool, options *compileopts.Option
 			daemon.Stdout = w
 			daemon.Stderr = w
 		}
-	case "probe-rs":
-		port = ":1337"
-		gdbCommands = append(gdbCommands, "monitor halt", "load", "monitor reset halt")
-
-		daemon = executeCommand(config.Options, "probe-rs", "gdb", "--chip="+config.Target.ProbeRSChip)
-		if ocdOutput {
-			// Make it clear which output is from the daemon.
-			w := &ColorWriter{
-				Out:    colorable.NewColorableStderr(),
-				Prefix: "probe-rs: ",
-				Color:  TermColorYellow,
-			}
-			daemon.Stdout = w
-			daemon.Stderr = w
-		}
 	case "jlink":
 		port = ":2331"
 		gdbCommands = append(gdbCommands, "load", "monitor reset halt")
@@ -786,15 +759,15 @@ func Debug(debugger, pkgName string, ocdOutput bool, options *compileopts.Option
 		}
 		defer func() {
 			daemon.Process.Signal(os.Interrupt)
-			var stopped atomic.Uint32
+			var stopped uint32
 			go func() {
 				time.Sleep(time.Millisecond * 100)
-				if stopped.Load() == 0 {
+				if atomic.LoadUint32(&stopped) == 0 {
 					daemon.Process.Kill()
 				}
 			}()
 			daemon.Wait()
-			stopped.Store(1)
+			atomic.StoreUint32(&stopped, 1)
 		}()
 	}
 
@@ -1046,7 +1019,7 @@ func buildAndRun(pkgName string, config *compileopts.Config, stdout io.Writer, c
 
 func touchSerialPortAt1200bps(port string) (err error) {
 	retryCount := 3
-	for range retryCount {
+	for i := 0; i < retryCount; i++ {
 		// Open port
 		p, e := serial.Open(port, &serial.Mode{BaudRate: 1200})
 		if e != nil {
@@ -1244,7 +1217,7 @@ func findFATMounts(options *compileopts.Options) ([]mountPoint, error) {
 		if err != nil {
 			return nil, fmt.Errorf("could not list mount points: %w", err)
 		}
-		for line := range strings.SplitSeq(string(tab), "\n") {
+		for _, line := range strings.Split(string(tab), "\n") {
 			fields := strings.Fields(line)
 			if len(fields) <= 2 {
 				continue
@@ -1273,7 +1246,7 @@ func findFATMounts(options *compileopts.Options) ([]mountPoint, error) {
 		}
 
 		// Extract data to convert to a []mountPoint slice.
-		for line := range strings.SplitSeq(out.String(), "\n") {
+		for _, line := range strings.Split(out.String(), "\n") {
 			words := strings.Fields(line)
 			if len(words) < 3 {
 				continue
@@ -1685,18 +1658,18 @@ func (m globalValuesFlag) String() string {
 }
 
 func (m globalValuesFlag) Set(value string) error {
-	before, after, ok := strings.Cut(value, "=")
+	equalsIndex := strings.IndexByte(value, '=')
-	if !ok {
+	if equalsIndex < 0 {
 		return errors.New("expected format pkgpath.Var=value")
 	}
-	pathAndName := before
+	pathAndName := value[:equalsIndex]
 	pointIndex := strings.LastIndexByte(pathAndName, '.')
 	if pointIndex < 0 {
 		return errors.New("expected format pkgpath.Var=value")
 	}
 	path := pathAndName[:pointIndex]
 	name := pathAndName[pointIndex+1:]
-	stringValue := after
+	stringValue := value[equalsIndex+1:]
 	if m[path] == nil {
 		m[path] = make(map[string]string)
 	}
@@ -1780,7 +1753,6 @@ func main() {
 	printSize := flag.String("size", "", "print sizes (none, short, full, html)")
 	printStacks := flag.Bool("print-stacks", false, "print stack sizes of goroutines")
 	printAllocsString := flag.String("print-allocs", "", "regular expression of functions for which heap allocations should be printed")
-	printAllocsCoverString := flag.String("print-allocs-cover", "", "like -print-allocs, but in go coverage tool format")
 	printCommands := flag.Bool("x", false, "Print commands")
 	flagJSON := flag.Bool("json", false, "print output in JSON format")
 	parallelism := flag.Int("p", runtime.GOMAXPROCS(0), "the number of build jobs that can run in parallel")
@@ -1861,14 +1833,8 @@ func main() {
 	}
 
 	var printAllocs *regexp.Regexp
-	printAllocsCover := false
+	if *printAllocsString != "" {
-	printAllocsPattern := *printAllocsString
+		printAllocs, err = regexp.Compile(*printAllocsString)
-	if *printAllocsCoverString != "" {
-		printAllocsPattern = *printAllocsCoverString
-		printAllocsCover = true
-	}
-	if printAllocsPattern != "" {
-		printAllocs, err = regexp.Compile(printAllocsPattern)
 		if err != nil {
 			fmt.Fprintln(os.Stderr, err)
 			os.Exit(1)
@@ -1916,7 +1882,6 @@ func main() {
 		PrintSizes:              *printSize,
 		PrintStacks:             *printStacks,
 		PrintAllocs:             printAllocs,
-		PrintAllocsCover:        printAllocsCover,
 		Tags:                    []string(tags),
 		TestConfig:              testConfig,
 		GlobalValues:            globalVarValues,
@@ -2054,6 +2019,7 @@ func main() {
 		// This uses an additional semaphore to reduce the memory usage.
 		testSema := make(chan struct{}, cap(options.Semaphore))
 		for i, pkgName := range explicitPkgNames {
+			pkgName := pkgName
 			buf := &bufs[i]
 			testSema <- struct{}{}
 			wg.Add(1)

main_test.go

@@ -46,6 +46,15 @@ var supportedLinuxArches = map[string]string{
 	"WASIp1":     "wasip1/wasm",
 }
 
+func init() {
+	major, _, _ := goenv.GetGorootVersion()
+	if major < 21 {
+		// Go 1.20 backwards compatibility.
+		// Should be removed once we drop support for Go 1.20.
+		delete(supportedLinuxArches, "WASIp1")
+	}
+}
+
 var sema = make(chan struct{}, runtime.NumCPU())
 
 func TestBuild(t *testing.T) {
@@ -67,8 +76,6 @@ func TestBuild(t *testing.T) {
 		"init_multi.go",
 		"interface.go",
 		"json.go",
-		"localtypes/",
-		"localtypes.go",
 		"map.go",
 		"map_bigkey.go",
 		"math.go",
@@ -245,21 +252,6 @@ func TestBuild(t *testing.T) {
 	}
 }
 
-// TestTimerStopResetRace checks that stopping or resetting a timer while its
-// callback is running behaves correctly. It reaches into the runtime timer
-// hooks via //go:linkname and relies on the threads scheduler, which is only
-// used on these hosts.
-func TestTimerStopResetRace(t *testing.T) {
-	t.Parallel()
-
-	switch runtime.GOOS {
-	case "darwin", "linux":
-	default:
-		t.Skipf("host GOOS %s does not use the threads scheduler", runtime.GOOS)
-	}
-	runTest("timer_stop_reset_race.go", optionsFromTarget("", sema), t, nil, nil)
-}
-
 func runPlatTests(options compileopts.Options, tests []string, t *testing.T) {
 	emuCheck(t, options)
 
@@ -398,7 +390,7 @@ func emuCheck(t *testing.T, options compileopts.Options) {
 		t.Fatal("failed to load target spec:", err)
 	}
 	if spec.Emulator != "" {
-		emulatorCommand, _, _ := strings.Cut(spec.Emulator, " ")
+		emulatorCommand := strings.SplitN(spec.Emulator, " ", 2)[0]
 		_, err := exec.LookPath(emulatorCommand)
 		if err != nil {
 			if errors.Is(err, exec.ErrNotFound) {
@@ -473,12 +465,6 @@ func runTestWithConfig(name string, t *testing.T, options compileopts.Options, c
 		options.Directory = path
 		pkgName = "."
 	}
-	isWebAssembly := strings.HasPrefix(options.Target, "wasi") ||
-		strings.HasPrefix(options.Target, "wasm") ||
-		strings.HasPrefix(options.GOARCH, "wasm")
-	if name == "testing.go" && isWebAssembly {
-		expectedOutputPath = TESTDATA + "/testing-wasm.txt"
-	}
 
 	config, err := builder.NewConfig(&options)
 	if err != nil {
@@ -488,18 +474,12 @@ func runTestWithConfig(name string, t *testing.T, options compileopts.Options, c
 	// Build the test binary.
 	stdout := &bytes.Buffer{}
 	_, err = buildAndRun(pkgName, config, stdout, cmdArgs, environmentVars, 2*time.Minute, func(cmd *exec.Cmd, result builder.BuildResult) error {
-		if config.EmulatorName() == "simavr" {
-			// simavr before v1.8 wrote firmware output to stderr and loader logs
-			// to stdout, but PR #490 swapped these streams:
-			// https://github.com/buserror/simavr/pull/490
-			cmd.Stdout = stdout
-		}
 		return cmd.Run()
 	})
 	if err != nil {
 		w := &bytes.Buffer{}
 		diagnostics.CreateDiagnostics(err).WriteTo(w, "")
-		for line := range strings.SplitSeq(strings.TrimRight(w.String(), "\n"), "\n") {
+		for _, line := range strings.Split(strings.TrimRight(w.String(), "\n"), "\n") {
 			t.Log(line)
 		}
 		if stdout.Len() != 0 {
@@ -511,7 +491,11 @@ func runTestWithConfig(name string, t *testing.T, options compileopts.Options, c
 
 	actual := stdout.Bytes()
 	if config.EmulatorName() == "simavr" {
-		actual = cleanSimAVRTestOutput(actual)
+		// Strip simavr log formatting.
+		actual = bytes.Replace(actual, []byte{0x1b, '[', '3', '2', 'm'}, nil, -1)
+		actual = bytes.Replace(actual, []byte{0x1b, '[', '0', 'm'}, nil, -1)
+		actual = bytes.Replace(actual, []byte{'.', '.', '\n'}, []byte{'\n'}, -1)
+		actual = bytes.Replace(actual, []byte{'\n', '.', '\n'}, []byte{'\n', '\n'}, -1)
 	}
 	if name == "testing.go" {
 		// Strip actual time.
@@ -538,28 +522,6 @@ func runTestWithConfig(name string, t *testing.T, options compileopts.Options, c
 	}
 }
 
-func cleanSimAVRTestOutput(output []byte) []byte {
-	output = bytes.ReplaceAll(output, []byte{0x1b, '[', '3', '2', 'm'}, nil)
-	output = bytes.ReplaceAll(output, []byte{0x1b, '[', '0', 'm'}, nil)
-	output = bytes.ReplaceAll(output, []byte{'.', '.', '\n'}, []byte{'\n'})
-	output = bytes.ReplaceAll(output, []byte{'\n', '.', '\n'}, []byte{'\n', '\n'})
-
-	var cleaned []byte
-	for _, line := range bytes.SplitAfter(output, []byte{'\n'}) {
-		trimmedLine := bytes.TrimRight(line, "\r\n")
-		if simavrLoadTextLogPattern.Match(trimmedLine) || simavrLoadBytesLogPattern.Match(trimmedLine) {
-			continue
-		}
-		cleaned = append(cleaned, line...)
-	}
-	return cleaned
-}
-
-var (
-	simavrLoadTextLogPattern  = regexp.MustCompile(`^Loaded [0-9]+ \.[A-Za-z0-9_]+( at address 0x[0-9a-fA-F]+)?$`)
-	simavrLoadBytesLogPattern = regexp.MustCompile(`^Loaded [0-9]+ bytes of [A-Za-z]+ data at (0x)?[0-9a-fA-F]+$`)
-)
-
 // Test WebAssembly files for certain properties.
 func TestWebAssembly(t *testing.T) {
 	t.Parallel()
@@ -575,6 +537,7 @@ func TestWebAssembly(t *testing.T) {
 		{name: "panic-default", target: "wasip1", imports: []string{"wasi_snapshot_preview1.fd_write", "wasi_snapshot_preview1.random_get"}},
 		{name: "panic-trap", target: "wasm-unknown", panicStrategy: "trap", imports: []string{}},
 	} {
+		tc := tc
 		t.Run(tc.name, func(t *testing.T) {
 			t.Parallel()
 			tmpdir := t.TempDir()
@@ -696,6 +659,7 @@ func TestWasmExport(t *testing.T) {
 	}
 
 	for _, tc := range tests {
+		tc := tc
 		t.Run(tc.name, func(t *testing.T) {
 			t.Parallel()
 
@@ -865,6 +829,7 @@ func TestWasmExportJS(t *testing.T) {
 		{name: "c-shared", buildMode: "c-shared"},
 	}
 	for _, tc := range tests {
+		tc := tc
 		t.Run(tc.name, func(t *testing.T) {
 			t.Parallel()
 			// Build the wasm binary.
@@ -912,6 +877,7 @@ func TestWasmExit(t *testing.T) {
 		{name: "exit-1-sleep", output: "slept\nexit code: 1\n"},
 	}
 	for _, tc := range tests {
+		tc := tc
 		t.Run(tc.name, func(t *testing.T) {
 			t.Parallel()
 			options := optionsFromTarget("wasm", sema)
@@ -954,48 +920,6 @@ func checkOutputData(t *testing.T, expectedOutput, actual []byte) {
 	}
 }
 
-func TestGoexitCrash(t *testing.T) {
-	t.Parallel()
-
-	options := optionsFromTarget("", sema)
-	config, err := builder.NewConfig(&options)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	for _, tc := range []struct {
-		name string
-		want string
-	}{
-		{"main", "all goroutines are asleep - deadlock!"},
-		{"deadlock", "all goroutines are asleep - deadlock!"},
-		{"exit", "all goroutines are asleep - deadlock!"},
-		{"main-other", "all goroutines are asleep - deadlock!"},
-		{"in-panic", "all goroutines are asleep - deadlock!"},
-		{"panic", "panic: panic after Goexit"},
-		{"recovered-panic", "all goroutines are asleep - deadlock!"},
-		{"recover-before-panic", "all goroutines are asleep - deadlock!"},
-		{"recover-before-panic-loop", "all goroutines are asleep - deadlock!"},
-	} {
-		t.Run(tc.name, func(t *testing.T) {
-			output := &bytes.Buffer{}
-			_, err = buildAndRun("testdata/goexit.go", config, output, []string{tc.name}, nil, time.Minute, func(cmd *exec.Cmd, result builder.BuildResult) error {
-				cmd.Stdout = nil
-				cmd.Stderr = nil
-				data, err := cmd.CombinedOutput()
-				output.Write(data)
-				return err
-			})
-			if err == nil {
-				t.Fatal("program unexpectedly exited successfully")
-			}
-			if !strings.Contains(output.String(), tc.want) {
-				t.Fatalf("output does not contain %q:\n%s", tc.want, output.String())
-			}
-		})
-	}
-}
-
 func TestTest(t *testing.T) {
 	t.Parallel()
 
@@ -1028,6 +952,7 @@ func TestTest(t *testing.T) {
 		)
 	}
 	for _, targ := range targs {
+		targ := targ
 		t.Run(targ.name, func(t *testing.T) {
 			t.Parallel()
 

monitor.go

@@ -278,7 +278,7 @@ func ListSerialPorts() ([]SerialPortInfo, error) {
 	return serialPortInfo, nil
 }
 
-var addressMatch = regexp.MustCompile(`panic: runtime error at 0x([0-9a-f]+): `)
+var addressMatch = regexp.MustCompile(`^panic: runtime error at 0x([0-9a-f]+): `)
 
 // Extract the address from the "panic: runtime error at" message.
 func extractPanicAddress(line []byte) uint64 {

src/crypto/rand/rand_arc4random.go

@@ -20,7 +20,7 @@ type reader struct {
 
 func (r *reader) Read(b []byte) (n int, err error) {
 	if len(b) != 0 {
-		libc_arc4random_buf(unsafe.Pointer(unsafe.SliceData(b)), uint(len(b)))
+		libc_arc4random_buf(unsafe.Pointer(&b[0]), uint(len(b)))
 	}
 	return len(b), nil
 }

src/crypto/rand/rand_baremetal.go

@@ -1,4 +1,4 @@
-//go:build nrf || (stm32 && !(stm32f103 || stm32l0x1 || stm32u0)) || (sam && atsamd51) || (sam && atsame5x) || esp32c3 || esp32s3 || tkey || (tinygo.riscv32 && virt)
+//go:build nrf || (stm32 && !(stm32f103 || stm32l0x1)) || (sam && atsamd51) || (sam && atsame5x) || esp32c3 || esp32s3 || tkey || (tinygo.riscv32 && virt)
 
 // If you update the above build constraint, you'll probably also need to update
 // src/runtime/rand_hwrng.go.

src/crypto/rand/rand_windows.go

@@ -25,7 +25,7 @@ func (r *reader) Read(b []byte) (n int, err error) {
 	// See for example: https://github.com/golang/go/issues/33542
 	// For Windows 7 and newer, we might switch to ProcessPrng in the future
 	// (which is a documented function and might be a tiny bit faster).
-	ok := libc_RtlGenRandom(unsafe.Pointer(unsafe.SliceData(b)), len(b))
+	ok := libc_RtlGenRandom(unsafe.Pointer(&b[0]), len(b))
 	if !ok {
 		return 0, errRandom
 	}

src/crypto/tls/cipher_suites.go

@@ -1,107 +0,0 @@
-// TINYGO: cipher suite IDs and the exported CipherSuites/InsecureCipherSuites
-// descriptors, copied verbatim from the Go official implementation. TinyGo has
-// no software handshake, so only these declarations (no selection machinery)
-// are provided to satisfy callers such as google.golang.org/grpc/credentials
-// and github.com/pion/dtls that reference the cipher-suite API surface.
-
-// Copyright 2010 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package tls
-
-// A list of cipher suite IDs that are, or have been, implemented by this
-// package.
-//
-// See https://www.iana.org/assignments/tls-parameters/tls-parameters.xml
-const (
-	// TLS 1.0 - 1.2 cipher suites.
-	TLS_RSA_WITH_RC4_128_SHA                      uint16 = 0x0005
-	TLS_RSA_WITH_3DES_EDE_CBC_SHA                 uint16 = 0x000a
-	TLS_RSA_WITH_AES_128_CBC_SHA                  uint16 = 0x002f
-	TLS_RSA_WITH_AES_256_CBC_SHA                  uint16 = 0x0035
-	TLS_RSA_WITH_AES_128_CBC_SHA256               uint16 = 0x003c
-	TLS_RSA_WITH_AES_128_GCM_SHA256               uint16 = 0x009c
-	TLS_RSA_WITH_AES_256_GCM_SHA384               uint16 = 0x009d
-	TLS_ECDHE_ECDSA_WITH_RC4_128_SHA              uint16 = 0xc007
-	TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA          uint16 = 0xc009
-	TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA          uint16 = 0xc00a
-	TLS_ECDHE_RSA_WITH_RC4_128_SHA                uint16 = 0xc011
-	TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA           uint16 = 0xc012
-	TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA            uint16 = 0xc013
-	TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA            uint16 = 0xc014
-	TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256       uint16 = 0xc023
-	TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256         uint16 = 0xc027
-	TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256         uint16 = 0xc02f
-	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256       uint16 = 0xc02b
-	TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384         uint16 = 0xc030
-	TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384       uint16 = 0xc02c
-	TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256   uint16 = 0xcca8
-	TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256 uint16 = 0xcca9
-
-	// TLS 1.3 cipher suites.
-	TLS_AES_128_GCM_SHA256       uint16 = 0x1301
-	TLS_AES_256_GCM_SHA384       uint16 = 0x1302
-	TLS_CHACHA20_POLY1305_SHA256 uint16 = 0x1303
-
-	// TLS_FALLBACK_SCSV isn't a standard cipher suite but an indicator
-	// that the client is doing version fallback. See RFC 7507.
-	TLS_FALLBACK_SCSV uint16 = 0x5600
-
-	// Legacy names for the corresponding cipher suites with the correct _SHA256
-	// suffix, retained for backward compatibility.
-	TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305   = TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256
-	TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305 = TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256
-)
-
-var (
-	supportedUpToTLS12 = []uint16{VersionTLS10, VersionTLS11, VersionTLS12}
-	supportedOnlyTLS12 = []uint16{VersionTLS12}
-	supportedOnlyTLS13 = []uint16{VersionTLS13}
-)
-
-// CipherSuites returns a list of cipher suites currently implemented by this
-// package, excluding those with security issues, which are returned by
-// InsecureCipherSuites.
-func CipherSuites() []*CipherSuite {
-	return []*CipherSuite{
-		{TLS_AES_128_GCM_SHA256, "TLS_AES_128_GCM_SHA256", supportedOnlyTLS13, false},
-		{TLS_AES_256_GCM_SHA384, "TLS_AES_256_GCM_SHA384", supportedOnlyTLS13, false},
-		{TLS_CHACHA20_POLY1305_SHA256, "TLS_CHACHA20_POLY1305_SHA256", supportedOnlyTLS13, false},
-
-		{TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, "TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA", supportedUpToTLS12, false},
-		{TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, "TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA", supportedUpToTLS12, false},
-		{TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, "TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA", supportedUpToTLS12, false},
-		{TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, "TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA", supportedUpToTLS12, false},
-		{TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, "TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256", supportedOnlyTLS12, false},
-		{TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, "TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384", supportedOnlyTLS12, false},
-		{TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, "TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256", supportedOnlyTLS12, false},
-		{TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, "TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384", supportedOnlyTLS12, false},
-		{TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256, "TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256", supportedOnlyTLS12, false},
-		{TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256, "TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256", supportedOnlyTLS12, false},
-	}
-}
-
-// InsecureCipherSuites returns a list of cipher suites currently implemented by
-// this package and which have security issues.
-//
-// Most applications should not use the cipher suites in this list, and should
-// only use those returned by CipherSuites.
-func InsecureCipherSuites() []*CipherSuite {
-	// This list includes legacy RSA kex, RC4, CBC_SHA256, and 3DES cipher
-	// suites. See cipherSuitesPreferenceOrder for details.
-	return []*CipherSuite{
-		{TLS_RSA_WITH_RC4_128_SHA, "TLS_RSA_WITH_RC4_128_SHA", supportedUpToTLS12, true},
-		{TLS_RSA_WITH_3DES_EDE_CBC_SHA, "TLS_RSA_WITH_3DES_EDE_CBC_SHA", supportedUpToTLS12, true},
-		{TLS_RSA_WITH_AES_128_CBC_SHA, "TLS_RSA_WITH_AES_128_CBC_SHA", supportedUpToTLS12, true},
-		{TLS_RSA_WITH_AES_256_CBC_SHA, "TLS_RSA_WITH_AES_256_CBC_SHA", supportedUpToTLS12, true},
-		{TLS_RSA_WITH_AES_128_CBC_SHA256, "TLS_RSA_WITH_AES_128_CBC_SHA256", supportedOnlyTLS12, true},
-		{TLS_RSA_WITH_AES_128_GCM_SHA256, "TLS_RSA_WITH_AES_128_GCM_SHA256", supportedOnlyTLS12, true},
-		{TLS_RSA_WITH_AES_256_GCM_SHA384, "TLS_RSA_WITH_AES_256_GCM_SHA384", supportedOnlyTLS12, true},
-		{TLS_ECDHE_ECDSA_WITH_RC4_128_SHA, "TLS_ECDHE_ECDSA_WITH_RC4_128_SHA", supportedUpToTLS12, true},
-		{TLS_ECDHE_RSA_WITH_RC4_128_SHA, "TLS_ECDHE_RSA_WITH_RC4_128_SHA", supportedUpToTLS12, true},
-		{TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA, "TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA", supportedUpToTLS12, true},
-		{TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256, "TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256", supportedOnlyTLS12, true},
-		{TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, "TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256", supportedOnlyTLS12, true},
-	}
-}

src/crypto/tls/common.go

@@ -55,16 +55,6 @@ func VersionName(version uint16) string {
 // only supports Elliptic Curve based groups. See RFC 8446, Section 4.2.7.
 type CurveID uint16
 
-const (
-	CurveP256          CurveID = 23
-	CurveP384          CurveID = 24
-	CurveP521          CurveID = 25
-	X25519             CurveID = 29
-	X25519MLKEM768     CurveID = 4588
-	SecP256r1MLKEM768  CurveID = 4587
-	SecP384r1MLKEM1024 CurveID = 4589
-)
-
 // CipherSuiteName returns the standard name for the passed cipher suite ID
 //
 // Not Implemented.
@@ -78,42 +68,14 @@ type ConnectionState struct {
 	//
 	// Minimum (empty) fields for fortio.org/log http logging and others
 	// to compile and run.
-	Version                    uint16
-	ServerName                 string
 	PeerCertificates []*x509.Certificate
 	CipherSuite      uint16
-	NegotiatedProtocol         string
-	NegotiatedProtocolIsMutual bool // Deprecated: this value is always true.
 }
 
 // ClientAuthType declares the policy the server will follow for
 // TLS Client Authentication.
 type ClientAuthType int
 
-const (
-	// NoClientCert indicates that no client certificate should be requested
-	// during the handshake, and if any certificates are sent they will not
-	// be verified.
-	NoClientCert ClientAuthType = iota
-	// RequestClientCert indicates that a client certificate should be requested
-	// during the handshake, but does not require that the client send any
-	// certificates.
-	RequestClientCert
-	// RequireAnyClientCert indicates that a client certificate should be requested
-	// during the handshake, and that at least one certificate is required to be
-	// sent by the client, but that certificate is not required to be valid.
-	RequireAnyClientCert
-	// VerifyClientCertIfGiven indicates that a client certificate should be requested
-	// during the handshake, but does not require that the client sends a
-	// certificate. If the client does send a certificate it is required to be
-	// valid.
-	VerifyClientCertIfGiven
-	// RequireAndVerifyClientCert indicates that a client certificate should be requested
-	// during the handshake, and that at least one valid certificate is required
-	// to be sent by the client.
-	RequireAndVerifyClientCert
-)
-
 // ClientSessionCache is a cache of ClientSessionState objects that can be used
 // by a client to resume a TLS session with a given server. ClientSessionCache
 // implementations should expect to be called concurrently from different
@@ -138,45 +100,6 @@ type ClientSessionCache interface {
 // RFC 8446, Section 4.2.3.
 type SignatureScheme uint16
 
-const (
-	// RSASSA-PKCS1-v1_5 algorithms.
-	PKCS1WithSHA256 SignatureScheme = 0x0401
-	PKCS1WithSHA384 SignatureScheme = 0x0501
-	PKCS1WithSHA512 SignatureScheme = 0x0601
-
-	// RSASSA-PSS algorithms with public key OID rsaEncryption.
-	PSSWithSHA256 SignatureScheme = 0x0804
-	PSSWithSHA384 SignatureScheme = 0x0805
-	PSSWithSHA512 SignatureScheme = 0x0806
-
-	// ECDSA algorithms. Only constrained to a specific curve in TLS 1.3.
-	ECDSAWithP256AndSHA256 SignatureScheme = 0x0403
-	ECDSAWithP384AndSHA384 SignatureScheme = 0x0503
-	ECDSAWithP521AndSHA512 SignatureScheme = 0x0603
-
-	// EdDSA algorithms.
-	Ed25519 SignatureScheme = 0x0807
-
-	// Legacy signature and hash algorithms for TLS 1.2.
-	PKCS1WithSHA1 SignatureScheme = 0x0201
-	ECDSAWithSHA1 SignatureScheme = 0x0203
-)
-
-// CipherSuite is a TLS cipher suite. Note that most functions in this package
-// accept and expose cipher suite IDs instead of this type.
-type CipherSuite struct {
-	ID   uint16
-	Name string
-
-	// Supported versions is the list of TLS protocol versions that can
-	// negotiate this cipher suite.
-	SupportedVersions []uint16
-
-	// Insecure is true if the cipher suite has known security issues
-	// due to its primitives, design, or implementation.
-	Insecure bool
-}
-
 // ClientHelloInfo contains information from a ClientHello message in order to
 // guide application logic in the GetCertificate and GetConfigForClient callbacks.
 type ClientHelloInfo struct {
@@ -536,48 +459,6 @@ type Config struct {
 	autoSessionTicketKeys []ticketKey
 }
 
-// Clone returns a shallow clone of c or nil if c is nil. It is safe to clone a
-// Config that is being used concurrently by a TLS client or server.
-func (c *Config) Clone() *Config {
-	if c == nil {
-		return nil
-	}
-	c.mutex.RLock()
-	defer c.mutex.RUnlock()
-	return &Config{
-		Rand:                        c.Rand,
-		Time:                        c.Time,
-		Certificates:                c.Certificates,
-		NameToCertificate:           c.NameToCertificate,
-		GetCertificate:              c.GetCertificate,
-		GetClientCertificate:        c.GetClientCertificate,
-		GetConfigForClient:          c.GetConfigForClient,
-		VerifyPeerCertificate:       c.VerifyPeerCertificate,
-		VerifyConnection:            c.VerifyConnection,
-		RootCAs:                     c.RootCAs,
-		NextProtos:                  c.NextProtos,
-		ServerName:                  c.ServerName,
-		ClientAuth:                  c.ClientAuth,
-		ClientCAs:                   c.ClientCAs,
-		InsecureSkipVerify:          c.InsecureSkipVerify,
-		CipherSuites:                c.CipherSuites,
-		PreferServerCipherSuites:    c.PreferServerCipherSuites,
-		SessionTicketsDisabled:      c.SessionTicketsDisabled,
-		SessionTicketKey:            c.SessionTicketKey,
-		ClientSessionCache:          c.ClientSessionCache,
-		UnwrapSession:               c.UnwrapSession,
-		WrapSession:                 c.WrapSession,
-		MinVersion:                  c.MinVersion,
-		MaxVersion:                  c.MaxVersion,
-		CurvePreferences:            c.CurvePreferences,
-		DynamicRecordSizingDisabled: c.DynamicRecordSizingDisabled,
-		Renegotiation:               c.Renegotiation,
-		KeyLogWriter:                c.KeyLogWriter,
-		sessionTicketKeys:           c.sessionTicketKeys,
-		autoSessionTicketKeys:       c.autoSessionTicketKeys,
-	}
-}
-
 // ticketKey is the internal representation of a session ticket key.
 type ticketKey struct {
 	aesKey  [16]byte

src/crypto/tls/tls.go

@@ -20,52 +20,13 @@ import (
 	"net"
 )
 
-// Conn represents a secured connection. TINYGO: the actual TLS handshake and
-// record layer are offloaded to the network device (see net.TLSConn), so Conn
-// is a thin wrapper over an underlying net.Conn that exists to satisfy callers
-// (e.g. google.golang.org/grpc/credentials) which expect the *tls.Conn API
-// shape — ConnectionState/Handshake — that this package does not implement in
-// software.
-type Conn struct {
-	net.Conn
-}
-
-// ConnectionState returns basic TLS details about the connection. TINYGO:
-// empty; TLS is offloaded to the network device.
-func (c *Conn) ConnectionState() ConnectionState {
-	return ConnectionState{}
-}
-
-// Handshake runs the client or server handshake protocol if it has not yet been
-// run. TINYGO: no-op; the handshake is performed by the network device.
-func (c *Conn) Handshake() error {
-	return c.HandshakeContext(context.Background())
-}
-
-// HandshakeContext is the context-aware variant of Handshake. TINYGO: no-op.
-func (c *Conn) HandshakeContext(ctx context.Context) error {
-	return nil
-}
-
-// NetConn returns the underlying connection that is wrapped by c.
-func (c *Conn) NetConn() net.Conn {
-	return c.Conn
-}
-
 // Client returns a new TLS client side connection
 // using conn as the underlying transport.
 // The config cannot be nil: users must set either ServerName or
 // InsecureSkipVerify in the config.
-func Client(conn net.Conn, config *Config) *Conn {
+func Client(conn net.Conn, config *Config) *net.TLSConn {
-	return &Conn{Conn: conn}
+	panic("tls.Client() not implemented")
-}
+	return nil
-
-// Server returns a new TLS server side connection
-// using conn as the underlying transport.
-// The configuration config must be non-nil and must include
-// at least one certificate or else set GetCertificate.
-func Server(conn net.Conn, config *Config) *Conn {
-	return &Conn{Conn: conn}
 }
 
 // A listener implements a network listener (net.Listener) for TLS connections.

src/device/amd64/cpu.go

@@ -1,74 +0,0 @@
-//go:build amd64
-
-package amd64
-
-const (
-	CPUIDTimeStampCounter   = 0x15
-	CPUIDProcessorFrequency = 0x16
-)
-
-type CPUExtendedFamily uint16
-
-const (
-	CPUFamilyIntelCore CPUExtendedFamily = 6
-)
-
-//export asmPause
-func AsmPause()
-
-//export asmReadRdtsc
-func AsmReadRdtsc() uint64
-
-//export asmCpuid
-func AsmCpuid(index uint32, registerEax *uint32, registerEbx *uint32, registerEcx *uint32) int
-
-var maxCpuidIndex uint32
-var stdVendorName0 uint32
-var stdCpuid1Eax uint32
-
-func init() {
-	AsmCpuid(0, &maxCpuidIndex, &stdVendorName0, nil)
-	AsmCpuid(1, &stdCpuid1Eax, nil, nil)
-}
-
-func getExtendedCPUFamily() CPUExtendedFamily {
-	family := CPUExtendedFamily((stdCpuid1Eax >> 8) & 0x0f)
-	family += CPUExtendedFamily((stdCpuid1Eax >> 20) & 0xff)
-	return family
-}
-
-func isIntel() bool {
-	return stdVendorName0 == 0x756e6547
-}
-
-func isIntelFamilyCore() bool {
-	return isIntel() && getExtendedCPUFamily() == CPUFamilyIntelCore
-}
-
-func InternalGetPerformanceCounterFrequency() uint64 {
-	if maxCpuidIndex >= CPUIDTimeStampCounter {
-		return cpuidCoreClockCalculateTSCFrequency()
-	}
-	return 0
-}
-
-func cpuidCoreClockCalculateTSCFrequency() uint64 {
-	var eax uint32
-	var ebx uint32
-	var ecx uint32
-
-	AsmCpuid(CPUIDTimeStampCounter, &eax, &ebx, &ecx)
-	if eax == 0 || ebx == 0 {
-		return 0
-	}
-
-	coreCrystalFrequency := uint64(ecx)
-	if coreCrystalFrequency == 0 {
-		if !isIntelFamilyCore() {
-			return 0
-		}
-		coreCrystalFrequency = 24000000
-	}
-
-	return ((coreCrystalFrequency * uint64(ebx)) + (uint64(eax) / 2)) / uint64(eax)
-}

src/device/amd64/cpu_amd64.S

@@ -1,39 +0,0 @@
-.section .text
-
-.global asmPause
-asmPause:
-    pause
-    ret
-
-.global asmReadRdtsc
-asmReadRdtsc:
-    rdtsc
-    shlq  $0x20, %rdx
-    orq   %rdx, %rax
-    ret
-
-.global asmCpuid
-asmCpuid:
-    pushq  %rbx
-
-    mov    %ecx, %eax
-    pushq  %rax
-
-    pushq  %rdx
-    cpuid
-
-    test   %r9, %r9
-    jz     .SkipEcx
-    mov    %ecx, (%r9)
-.SkipEcx:
-    popq   %rcx
-    jrcxz  .SkipEax
-    mov    %eax, (%rcx)
-.SkipEax:
-    mov    %r8, %rcx
-    jrcxz  .SkipEbx
-    mov    %ebx, (%rcx)
-.SkipEbx:
-    popq   %rax
-    popq   %rbx
-    ret

src/device/esp/esp32c6.S

@@ -1,66 +0,0 @@
-// This is a very minimal bootloader for the ESP32-C6. It only initializes the
-// flash and then continues with the generic RISC-V initialization code, which
-// in turn will call runtime.main.
-// It is written in assembly (and not in a higher level language) to make sure
-// it is entirely loaded into IRAM and doesn't accidentally call functions
-// stored in IROM.
-//
-// The ESP32-C6 has a unified IRAM/DRAM address space at 0x40800000, and
-// separate DROM (0x42800000) / IROM (0x42000000) flash-mapped regions.
-
-.section .init
-.global call_start_cpu0
-.type call_start_cpu0,@function
-call_start_cpu0:
-    // At this point:
-    // - The ROM bootloader is finished and has jumped to here.
-    // - We're running from IRAM: both IRAM and DRAM segments have been loaded
-    //   by the ROM bootloader.
-    // - We have a usable stack (but not the one we would like to use).
-    // - No flash mappings (MMU) are set up yet.
-
-    // Reset MMU, see bootloader_reset_mmu in the ESP-IDF.
-    call Cache_Suspend_ICache
-    mv s0, a0 // autoload value
-    call Cache_Invalidate_ICache_All
-    call Cache_MMU_Init
-
-    // Set up flash mapping (both IROM and DROM).
-    // On ESP32-C6, Cache_Dbus_MMU_Set is replaced by Cache_MSPI_MMU_Set
-    // which has an extra "sensitive" parameter.
-    // C equivalent:
-    //   Cache_MSPI_MMU_Set(0, 0, 0x42000000, 0, 64, 256, 0)
-    // Maps 16MB starting at 0x42000000, covering both IROM and DROM.
-    li a0, 0              // sensitive: no flash encryption
-    li a1, 0              // ext_ram: MMU_ACCESS_FLASH
-    li a2, 0x42000000     // vaddr: start of flash-mapped region
-    li a3, 0              // paddr: physical address in the flash chip
-    li a4, 64             // psize: always 64 (kilobytes)
-    li a5, 256            // num: pages (16MB / 64K = 256, covers IROM+DROM)
-    li a6, 0              // fixed
-    call Cache_MSPI_MMU_Set
-
-    // Enable the flash cache.
-    mv a0, s0 // restore autoload value from Cache_Suspend_ICache call
-    call Cache_Resume_ICache
-
-    // Jump to generic RISC-V initialization, which initializes the stack
-    // pointer and globals register. It should not return.
-    j _start
-
-.section .text.exception_vectors
-.global _vector_table
-.type _vector_table,@function
-
-_vector_table:
-
-    .option push
-    .option norvc
-
-    .rept 32
-    j handleInterruptASM            /* interrupt handler */
-    .endr
-
-    .option pop
-
-.size _vector_table, .-_vector_table

src/device/gba/gba.go

@@ -85,9 +85,6 @@ var (
 	SIO = (*SIO_Type)(unsafe.Add(unsafe.Pointer(REG_BASE), uintptr(0x0134)))
 
 	INTERRUPT = (*INTERRUPT_Type)(unsafe.Add(unsafe.Pointer(REG_BASE), uintptr(0x0200)))
-
-	// BIOS interrupt flags
-	BIOS_IF = (*volatile.Register16)(unsafe.Pointer(uintptr(0x03007FF8)))
 )
 
 // Main memory sections
@@ -828,60 +825,3 @@ const (
 	OAMOBJ_ATT2_PB_Pos = 0xC
 	OAMOBJ_ATT2_PB_Msk = 0xF
 )
-
-// Constants for SOUND: sound control
-const (
-	SSW_INC = 0x0    // Increasing sweep rate
-	SSW_DEC = 0x0008 // Decreasing sweep rate
-	SSW_OFF = 0x0008 // Disable sweep altogether
-
-	SSQR_DUTY1_8 = 0x0    // 12.5% duty cycle (#-------)
-	SSQR_DUTY1_4 = 0x0040 // 25% duty cycle (##------)
-	SSQR_DUTY1_2 = 0x0080 // 50% duty cycle (####----)
-	SSQR_DUTY3_4 = 0x00C0 // 75% duty cycle (######--) Equivalent to 25%
-	SSQR_INC     = 0x0    // Increasing volume
-	SSQR_DEC     = 0x0800 // Decreasing volume
-
-	SFREQ_HOLD  = 0x0    // Continuous play
-	SFREQ_TIMED = 0x4000 // Timed play
-	SFREQ_RESET = 0x8000 // Reset sound
-
-	SDMG_SQR1  = 0x01
-	SDMG_SQR2  = 0x02
-	SDMG_WAVE  = 0x04
-	SDMG_NOISE = 0x08
-
-	SDMG_LSQR1  = 0x0100 // Enable channel 1 on left
-	SDMG_LSQR2  = 0x0200 // Enable channel 2 on left
-	SDMG_LWAVE  = 0x0400 // Enable channel 3 on left
-	SDMG_LNOISE = 0x0800 // Enable channel 4 on left
-	SDMG_RSQR1  = 0x1000 // Enable channel 1 on right
-	SDMG_RSQR2  = 0x2000 // Enable channel 2 on right
-	SDMG_RWAVE  = 0x4000 // Enable channel 3 on right
-	SDMG_RNOISE = 0x8000 // Enable channel 4 on right
-
-	SDS_DMG25  = 0x0    // Tone generators at 25% volume
-	SDS_DMG50  = 0x0001 // Tone generators at 50% volume
-	SDS_DMG100 = 0x0002 // Tone generators at 100% volume
-	SDS_A50    = 0x0    // Direct Sound A at 50% volume
-	SDS_A100   = 0x0004 // Direct Sound A at 100% volume
-	SDS_B50    = 0x0    // Direct Sound B at 50% volume
-	SDS_B100   = 0x0008 // Direct Sound B at 100% volume
-	SDS_AR     = 0x0100 // Enable Direct Sound A on right
-	SDS_AL     = 0x0200 // Enable Direct Sound A on left
-	SDS_ATMR0  = 0x0    // Direct Sound A to use timer 0
-	SDS_ATMR1  = 0x0400 // Direct Sound A to use timer 1
-	SDS_ARESET = 0x0800 // Reset FIFO of Direct Sound A
-	SDS_BR     = 0x1000 // Enable Direct Sound B on right
-	SDS_BL     = 0x2000 // Enable Direct Sound B on left
-	SDS_BTMR0  = 0x0    // Direct Sound B to use timer 0
-	SDS_BTMR1  = 0x4000 // Direct Sound B to use timer 1
-	SDS_BRESET = 0x8000 // Reset FIFO of Direct Sound B
-
-	SSTAT_SQR1    = 0x0001 // (R) Channel 1 status
-	SSTAT_SQR2    = 0x0002 // (R) Channel 2 status
-	SSTAT_WAVE    = 0x0004 // (R) Channel 3 status
-	SSTAT_NOISE   = 0x0008 // (R) Channel 4 status
-	SSTAT_DISABLE = 0      // Disable sound
-	SSTAT_ENABLE  = 0x0080 // Enable sound. NOTE: enable before using any other sound regs
-)

src/device/uefi/arch_x86.go

@@ -1,17 +0,0 @@
-//go:build i386 || amd64
-
-package uefi
-
-import "device/amd64"
-
-func Ticks() uint64 {
-	return amd64.AsmReadRdtsc()
-}
-
-func CpuPause() {
-	amd64.AsmPause()
-}
-
-func getTSCFrequency() uint64 {
-	return amd64.InternalGetPerformanceCounterFrequency()
-}

src/device/uefi/asm_amd64.S

@@ -1,201 +0,0 @@
-.section .text
-
-.global uefiCall0
-uefiCall0:
-    pushq  %rbp
-    movq   %rsp, %rbp
-    subq   $0x20, %rsp
-    callq  *%rcx
-    movq   %rbp, %rsp
-    popq   %rbp
-    ret
-
-.global uefiCall1
-uefiCall1:
-    pushq  %rbp
-    movq   %rsp, %rbp
-    subq   $0x20, %rsp
-    movq   %rcx, %rax
-    movq   %rdx, %rcx
-    callq  *%rax
-    movq   %rbp, %rsp
-    popq   %rbp
-    ret
-
-.global uefiCall2
-uefiCall2:
-    pushq  %rbp
-    movq   %rsp, %rbp
-    subq   $0x20, %rsp
-    movq   %rcx, %rax
-    movq   %rdx, %rcx
-    movq   %r8,  %rdx
-    callq  *%rax
-    movq   %rbp, %rsp
-    popq   %rbp
-    ret
-
-.global uefiCall3
-uefiCall3:
-    pushq  %rbp
-    movq   %rsp, %rbp
-    subq   $0x20, %rsp
-    movq   %rcx, %rax
-    movq   %rdx, %rcx
-    movq   %r8,  %rdx
-    movq   %r9,  %r8
-    callq  *%rax
-    movq   %rbp, %rsp
-    popq   %rbp
-    ret
-
-.global uefiCall4
-uefiCall4:
-    pushq  %rbp
-    movq   %rsp, %rbp
-    subq   $0x20, %rsp
-    movq   %rcx, %rax
-    movq   %rdx, %rcx
-    movq   %r8,  %rdx
-    movq   %r9,  %r8
-    movq   0x30(%rbp), %r9
-    callq  *%rax
-    movq   %rbp, %rsp
-    popq   %rbp
-    ret
-
-.global uefiCall5
-uefiCall5:
-    pushq  %rbp
-    movq   %rsp, %rbp
-    subq   $0x30, %rsp
-    movq   %rcx, %rax
-    movq   %rdx, %rcx
-    movq   %r8,  %rdx
-    movq   %r9,  %r8
-    movq   0x30(%rbp), %r9
-    movq   0x38(%rbp), %r10
-    movq   %r10, 0x20(%rsp)
-    callq  *%rax
-    movq   %rbp, %rsp
-    popq   %rbp
-    ret
-
-.global uefiCall6
-uefiCall6:
-    pushq  %rbp
-    movq   %rsp, %rbp
-    subq   $0x30, %rsp
-    movq   %rcx, %rax
-    movq   %rdx, %rcx
-    movq   %r8,  %rdx
-    movq   %r9,  %r8
-    movq   0x30(%rbp), %r9
-    movq   0x38(%rbp), %r10
-    movq   %r10, 0x20(%rsp)
-    movq   0x40(%rbp), %r10
-    movq   %r10, 0x28(%rsp)
-    callq  *%rax
-    movq   %rbp, %rsp
-    popq   %rbp
-    ret
-
-.global uefiCall7
-uefiCall7:
-    pushq  %rbp
-    movq   %rsp, %rbp
-    subq   $0x40, %rsp
-    movq   %rcx, %rax
-    movq   %rdx, %rcx
-    movq   %r8,  %rdx
-    movq   %r9,  %r8
-    movq   0x30(%rbp), %r9
-    movq   0x38(%rbp), %r10
-    movq   %r10, 0x20(%rsp)
-    movq   0x40(%rbp), %r10
-    movq   %r10, 0x28(%rsp)
-    movq   0x48(%rbp), %r10
-    movq   %r10, 0x30(%rsp)
-    callq  *%rax
-    movq   %rbp, %rsp
-    popq   %rbp
-    ret
-
-.global uefiCall8
-uefiCall8:
-    pushq  %rbp
-    movq   %rsp, %rbp
-    subq   $0x40, %rsp
-    movq   %rcx, %rax
-    movq   %rdx, %rcx
-    movq   %r8,  %rdx
-    movq   %r9,  %r8
-    movq   0x30(%rbp), %r9
-    movq   0x38(%rbp), %r10
-    movq   %r10, 0x20(%rsp)
-    movq   0x40(%rbp), %r10
-    movq   %r10, 0x28(%rsp)
-    movq   0x48(%rbp), %r10
-    movq   %r10, 0x30(%rsp)
-    movq   0x50(%rbp), %r10
-    movq   %r10, 0x38(%rsp)
-    callq  *%rax
-    movq   %rbp, %rsp
-    popq   %rbp
-    ret
-
-.global uefiCall9
-uefiCall9:
-    pushq  %rbp
-    movq   %rsp, %rbp
-    subq   $0x50, %rsp
-    movq   %rcx, %rax
-    movq   %rdx, %rcx
-    movq   %r8,  %rdx
-    movq   %r9,  %r8
-    movq   0x30(%rbp), %r9
-    movq   0x38(%rbp), %r10
-    movq   %r10, 0x20(%rsp)
-    movq   0x40(%rbp), %r10
-    movq   %r10, 0x28(%rsp)
-    movq   0x48(%rbp), %r10
-    movq   %r10, 0x30(%rsp)
-    movq   0x50(%rbp), %r10
-    movq   %r10, 0x38(%rsp)
-    movq   0x58(%rbp), %r10
-    movq   %r10, 0x40(%rsp)
-    callq  *%rax
-    movq   %rbp, %rsp
-    popq   %rbp
-    ret
-
-.global uefiCall10
-uefiCall10:
-    pushq  %rbp
-    movq   %rsp, %rbp
-    subq   $0x50, %rsp
-    movq   %rcx, %rax
-    movq   %rdx, %rcx
-    movq   %r8,  %rdx
-    movq   %r9,  %r8
-    movq   0x30(%rbp), %r9
-    movq   0x38(%rbp), %r10
-    movq   %r10, 0x20(%rsp)
-    movq   0x40(%rbp), %r10
-    movq   %r10, 0x28(%rsp)
-    movq   0x48(%rbp), %r10
-    movq   %r10, 0x30(%rsp)
-    movq   0x50(%rbp), %r10
-    movq   %r10, 0x38(%rsp)
-    movq   0x58(%rbp), %r10
-    movq   %r10, 0x40(%rsp)
-    movq   0x60(%rbp), %r10
-    movq   %r10, 0x48(%rsp)
-    callq  *%rax
-    movq   %rbp, %rsp
-    popq   %rbp
-    ret
-
-.global ___chkstk_ms
-___chkstk_ms:
-    ret

src/device/uefi/call.go

@@ -1,45 +0,0 @@
-package uefi
-
-//go:nosplit
-//export uefiCall0
-func UefiCall0(fn uintptr) EFI_STATUS
-
-//go:nosplit
-//go:export uefiCall1
-func UefiCall1(fn uintptr, a uintptr) EFI_STATUS
-
-//go:nosplit
-//go:export uefiCall2
-func UefiCall2(fn uintptr, a uintptr, b uintptr) EFI_STATUS
-
-//go:nosplit
-//go:export uefiCall3
-func UefiCall3(fn uintptr, a uintptr, b uintptr, c uintptr) EFI_STATUS
-
-//go:nosplit
-//go:export uefiCall4
-func UefiCall4(fn uintptr, a uintptr, b uintptr, c uintptr, d uintptr) EFI_STATUS
-
-//go:nosplit
-//go:export uefiCall5
-func UefiCall5(fn uintptr, a uintptr, b uintptr, c uintptr, d uintptr, e uintptr) EFI_STATUS
-
-//go:nosplit
-//go:export uefiCall6
-func UefiCall6(fn uintptr, a uintptr, b uintptr, c uintptr, d uintptr, e uintptr, f uintptr) EFI_STATUS
-
-//go:nosplit
-//go:export uefiCall7
-func UefiCall7(fn uintptr, a uintptr, b uintptr, c uintptr, d uintptr, e uintptr, f uintptr, g uintptr) EFI_STATUS
-
-//go:nosplit
-//go:export uefiCall8
-func UefiCall8(fn uintptr, a uintptr, b uintptr, c uintptr, d uintptr, e uintptr, f uintptr, g uintptr, h uintptr) EFI_STATUS
-
-//go:nosplit
-//go:export uefiCall9
-func UefiCall9(fn uintptr, a uintptr, b uintptr, c uintptr, d uintptr, e uintptr, f uintptr, g uintptr, h uintptr, i uintptr) EFI_STATUS
-
-//go:nosplit
-//go:export uefiCall10
-func UefiCall10(fn uintptr, a uintptr, b uintptr, c uintptr, d uintptr, e uintptr, f uintptr, g uintptr, h uintptr, i uintptr, j uintptr) EFI_STATUS

src/device/uefi/char16.go

@@ -1,77 +0,0 @@
-package uefi
-
-import (
-	"unicode/utf16"
-	"unsafe"
-)
-
-// StringToCHAR16 converts a Go string to a UTF-16 code unit slice.
-func StringToCHAR16(s string) []CHAR16 {
-	if s == "" {
-		return nil
-	}
-
-	encoded := utf16.Encode([]rune(s))
-	out := make([]CHAR16, len(encoded))
-	for i, r := range encoded {
-		out[i] = CHAR16(r)
-	}
-	return out
-}
-
-// StringToCHAR16Z converts a Go string to a NUL-terminated UTF-16 code unit slice.
-func StringToCHAR16Z(s string) []CHAR16 {
-	out := StringToCHAR16(s)
-	return append(out, 0)
-}
-
-// BytesToCHAR16 converts UTF-8 text bytes to a UTF-16 code unit slice.
-func BytesToCHAR16(b []byte) []CHAR16 {
-	return StringToCHAR16(string(b))
-}
-
-// BytesToCHAR16Z converts UTF-8 text bytes to a NUL-terminated UTF-16 code unit slice.
-func BytesToCHAR16Z(b []byte) []CHAR16 {
-	return StringToCHAR16Z(string(b))
-}
-
-// CHAR16ToString converts a UTF-16 code unit slice to a Go string.
-func CHAR16ToString(input []CHAR16) string {
-	if len(input) == 0 {
-		return ""
-	}
-
-	units := make([]uint16, len(input))
-	for i, c := range input {
-		units[i] = uint16(c)
-	}
-	return string(utf16.Decode(units))
-}
-
-// CHAR16ToBytes converts a UTF-16 code unit slice to UTF-8 text bytes.
-func CHAR16ToBytes(input []CHAR16) []byte {
-	return []byte(CHAR16ToString(input))
-}
-
-// CHAR16PtrToString converts a NUL-terminated UTF-16 string pointer to a Go string.
-func CHAR16PtrToString(input *CHAR16) string {
-	if input == nil {
-		return ""
-	}
-
-	ptr := uintptr(unsafe.Pointer(input))
-	length := 0
-	for *(*CHAR16)(unsafe.Pointer(ptr)) != 0 {
-		length++
-		ptr += 2
-	}
-	return CHAR16PtrLenToString(input, length)
-}
-
-// CHAR16PtrLenToString converts a UTF-16 string pointer with a known code unit count to a Go string.
-func CHAR16PtrLenToString(input *CHAR16, length int) string {
-	if input == nil || length <= 0 {
-		return ""
-	}
-	return CHAR16ToString(unsafe.Slice(input, length))
-}

src/device/uefi/clock.go

@@ -1,39 +0,0 @@
-//go:build uefi
-
-package uefi
-
-import "sync"
-
-var calibrateMutex sync.Mutex
-var calculatedFrequency uint64
-
-func TicksFrequency() uint64 {
-	frequency := getTSCFrequency()
-	if frequency > 0 {
-		return frequency
-	}
-
-	calibrateMutex.Lock()
-	defer calibrateMutex.Unlock()
-	if calculatedFrequency > 0 {
-		return calculatedFrequency
-	}
-
-	var event EFI_EVENT
-	var index UINTN
-	if BS().CreateEvent(EVT_TIMER, TPL_CALLBACK, nil, nil, &event) != EFI_SUCCESS {
-		return 0
-	}
-	defer BS().CloseEvent(event)
-
-	start := Ticks()
-	if BS().SetTimer(event, TimerPeriodic, 250*10000) != EFI_SUCCESS {
-		return 0
-	}
-	if BS().WaitForEvent(1, &event, &index) != EFI_SUCCESS {
-		return 0
-	}
-
-	calculatedFrequency = (Ticks() - start) * 4
-	return calculatedFrequency
-}

src/device/uefi/efidef.go

@@ -1,66 +0,0 @@
-package uefi
-
-type UINTN uintptr
-type EFI_STATUS UINTN
-type EFI_TPL UINTN
-type EFI_HANDLE uintptr
-type EFI_EVENT uintptr
-type EFI_PHYSICAL_ADDRESS uint64
-
-type CHAR16 uint16
-type BOOLEAN bool
-type VOID byte
-
-type EFI_GUID struct {
-	Data1 uint32
-	Data2 uint16
-	Data3 uint16
-	Data4 [8]byte
-}
-
-type EFI_TABLE_HEADER struct {
-	Signature  uint64
-	Revision   uint32
-	HeaderSize uint32
-	CRC32      uint32
-	Reserved   uint32
-}
-
-type EFI_ALLOCATE_TYPE int
-
-const (
-	AllocateAnyPages EFI_ALLOCATE_TYPE = iota
-	AllocateMaxAddress
-	AllocateAddress
-)
-
-type EFI_MEMORY_TYPE int
-
-const (
-	EfiReservedMemoryType EFI_MEMORY_TYPE = iota
-	EfiLoaderCode
-	EfiLoaderData
-	EfiBootServicesCode
-	EfiBootServicesData
-	EfiRuntimeServicesCode
-	EfiRuntimeServicesData
-	EfiConventionalMemory
-)
-
-type EVENT_TYPE uint32
-
-const (
-	EVT_TIMER EVENT_TYPE = 0x80000000
-)
-
-const (
-	TPL_CALLBACK EFI_TPL = 8
-)
-
-type EFI_TIMER_DELAY int
-
-const (
-	TimerCancel EFI_TIMER_DELAY = iota
-	TimerPeriodic
-	TimerRelative
-)

src/device/uefi/efistatus.go

@@ -1,111 +0,0 @@
-package uefi
-
-const (
-	uintnSize = 32 << (^uintptr(0) >> 63)
-	errorMask = 1 << uintptr(uintnSize-1)
-)
-
-const (
-	EFI_SUCCESS              EFI_STATUS = 0
-	EFI_LOAD_ERROR           EFI_STATUS = errorMask | 1
-	EFI_INVALID_PARAMETER    EFI_STATUS = errorMask | 2
-	EFI_UNSUPPORTED          EFI_STATUS = errorMask | 3
-	EFI_BAD_BUFFER_SIZE      EFI_STATUS = errorMask | 4
-	EFI_BUFFER_TOO_SMALL     EFI_STATUS = errorMask | 5
-	EFI_NOT_READY            EFI_STATUS = errorMask | 6
-	EFI_DEVICE_ERROR         EFI_STATUS = errorMask | 7
-	EFI_WRITE_PROTECTED      EFI_STATUS = errorMask | 8
-	EFI_OUT_OF_RESOURCES     EFI_STATUS = errorMask | 9
-	EFI_VOLUME_CORRUPTED     EFI_STATUS = errorMask | 10
-	EFI_VOLUME_FULL          EFI_STATUS = errorMask | 11
-	EFI_NO_MEDIA             EFI_STATUS = errorMask | 12
-	EFI_MEDIA_CHANGED        EFI_STATUS = errorMask | 13
-	EFI_NOT_FOUND            EFI_STATUS = errorMask | 14
-	EFI_ACCESS_DENIED        EFI_STATUS = errorMask | 15
-	EFI_NO_RESPONSE          EFI_STATUS = errorMask | 16
-	EFI_NO_MAPPING           EFI_STATUS = errorMask | 17
-	EFI_TIMEOUT              EFI_STATUS = errorMask | 18
-	EFI_NOT_STARTED          EFI_STATUS = errorMask | 19
-	EFI_ALREADY_STARTED      EFI_STATUS = errorMask | 20
-	EFI_ABORTED              EFI_STATUS = errorMask | 21
-	EFI_ICMP_ERROR           EFI_STATUS = errorMask | 22
-	EFI_TFTP_ERROR           EFI_STATUS = errorMask | 23
-	EFI_PROTOCOL_ERROR       EFI_STATUS = errorMask | 24
-	EFI_INCOMPATIBLE_VERSION EFI_STATUS = errorMask | 25
-	EFI_SECURITY_VIOLATION   EFI_STATUS = errorMask | 26
-	EFI_CRC_ERROR            EFI_STATUS = errorMask | 27
-	EFI_END_OF_MEDIA         EFI_STATUS = errorMask | 28
-	EFI_END_OF_FILE          EFI_STATUS = errorMask | 31
-	EFI_INVALID_LANGUAGE     EFI_STATUS = errorMask | 32
-	EFI_COMPROMISED_DATA     EFI_STATUS = errorMask | 33
-	EFI_IP_ADDRESS_CONFLICT  EFI_STATUS = errorMask | 34
-	EFI_HTTP_ERROR           EFI_STATUS = errorMask | 35
-)
-
-var errMap = map[EFI_STATUS]*Error{}
-
-var (
-	ErrLoadError           = newError(EFI_LOAD_ERROR, "image failed to load")
-	ErrInvalidParameter    = newError(EFI_INVALID_PARAMETER, "a parameter was incorrect")
-	ErrUnsupported         = newError(EFI_UNSUPPORTED, "operation not supported")
-	ErrBadBufferSize       = newError(EFI_BAD_BUFFER_SIZE, "buffer size incorrect for request")
-	ErrBufferTooSmall      = newError(EFI_BUFFER_TOO_SMALL, "buffer too small; size returned in parameter")
-	ErrNotReady            = newError(EFI_NOT_READY, "no data pending")
-	ErrDeviceError         = newError(EFI_DEVICE_ERROR, "physical device reported an error")
-	ErrWriteProtected      = newError(EFI_WRITE_PROTECTED, "device is write-protected")
-	ErrOutOfResources      = newError(EFI_OUT_OF_RESOURCES, "out of resources")
-	ErrVolumeCorrupted     = newError(EFI_VOLUME_CORRUPTED, "filesystem inconsistency detected")
-	ErrVolumeFull          = newError(EFI_VOLUME_FULL, "no more space on filesystem")
-	ErrNoMedia             = newError(EFI_NO_MEDIA, "device contains no medium")
-	ErrMediaChanged        = newError(EFI_MEDIA_CHANGED, "medium changed since last access")
-	ErrNotFound            = newError(EFI_NOT_FOUND, "item not found")
-	ErrAccessDenied        = newError(EFI_ACCESS_DENIED, "access denied")
-	ErrNoResponse          = newError(EFI_NO_RESPONSE, "server not found or no response")
-	ErrNoMapping           = newError(EFI_NO_MAPPING, "no device mapping exists")
-	ErrTimeout             = newError(EFI_TIMEOUT, "timeout expired")
-	ErrNotStarted          = newError(EFI_NOT_STARTED, "protocol not started")
-	ErrAlreadyStarted      = newError(EFI_ALREADY_STARTED, "protocol already started")
-	ErrAborted             = newError(EFI_ABORTED, "operation aborted")
-	ErrICMPError           = newError(EFI_ICMP_ERROR, "ICMP error during network operation")
-	ErrTFTPError           = newError(EFI_TFTP_ERROR, "TFTP error during network operation")
-	ErrProtocolError       = newError(EFI_PROTOCOL_ERROR, "protocol error during network operation")
-	ErrIncompatibleVersion = newError(EFI_INCOMPATIBLE_VERSION, "requested version incompatible")
-	ErrSecurityViolation   = newError(EFI_SECURITY_VIOLATION, "security violation")
-	ErrCRCError            = newError(EFI_CRC_ERROR, "CRC error detected")
-	ErrEndOfMedia          = newError(EFI_END_OF_MEDIA, "beginning or end of media reached")
-	ErrEndOfFile           = newError(EFI_END_OF_FILE, "end of file reached")
-	ErrInvalidLanguage     = newError(EFI_INVALID_LANGUAGE, "invalid language specified")
-	ErrCompromisedData     = newError(EFI_COMPROMISED_DATA, "data security status unknown or compromised")
-	ErrIPAddressConflict   = newError(EFI_IP_ADDRESS_CONFLICT, "IP address conflict detected")
-	ErrHTTPError           = newError(EFI_HTTP_ERROR, "HTTP error during network operation")
-)
-
-type Error struct {
-	code EFI_STATUS
-	msg  string
-}
-
-func newError(code EFI_STATUS, msg string) *Error {
-	err := &Error{code: code, msg: msg}
-	errMap[code] = err
-	return err
-}
-
-func (e *Error) Error() string {
-	return e.msg
-}
-
-func (e *Error) Status() EFI_STATUS {
-	return e.code
-}
-
-func StatusError(status EFI_STATUS) *Error {
-	if status == EFI_SUCCESS {
-		return nil
-	}
-	err, ok := errMap[status]
-	if !ok {
-		return newError(status, "unknown EFI error")
-	}
-	return err
-}

src/device/uefi/simple_text_out.go

@@ -1,74 +0,0 @@
-package uefi
-
-import "unsafe"
-
-func booleanArg(v BOOLEAN) uintptr {
-	if v {
-		return 1
-	}
-	return 0
-}
-
-type EFI_SIMPLE_TEXT_OUTPUT_MODE struct {
-	MaxMode       int32
-	Mode          int32
-	Attribute     int32
-	CursorColumn  int32
-	CursorRow     int32
-	CursorVisible BOOLEAN
-}
-
-type EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL struct {
-	reset             uintptr
-	outputString      uintptr
-	testString        uintptr
-	queryMode         uintptr
-	setMode           uintptr
-	setAttribute      uintptr
-	clearScreen       uintptr
-	setCursorPosition uintptr
-	enableCursor      uintptr
-	Mode              *EFI_SIMPLE_TEXT_OUTPUT_MODE
-}
-
-func (p *EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL) Reset(extendedVerification BOOLEAN) EFI_STATUS {
-	return UefiCall2(p.reset, uintptr(unsafe.Pointer(p)), booleanArg(extendedVerification))
-}
-
-func (p *EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL) OutputString(s *CHAR16) EFI_STATUS {
-	return UefiCall2(p.outputString, uintptr(unsafe.Pointer(p)), uintptr(unsafe.Pointer(s)))
-}
-
-func (p *EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL) TestString(s *CHAR16) EFI_STATUS {
-	return UefiCall2(p.testString, uintptr(unsafe.Pointer(p)), uintptr(unsafe.Pointer(s)))
-}
-
-func (p *EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL) QueryMode(modeNumber UINTN, columns *UINTN, rows *UINTN) EFI_STATUS {
-	return UefiCall4(
-		p.queryMode,
-		uintptr(unsafe.Pointer(p)),
-		uintptr(modeNumber),
-		uintptr(unsafe.Pointer(columns)),
-		uintptr(unsafe.Pointer(rows)),
-	)
-}
-
-func (p *EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL) SetMode(modeNumber UINTN) EFI_STATUS {
-	return UefiCall2(p.setMode, uintptr(unsafe.Pointer(p)), uintptr(modeNumber))
-}
-
-func (p *EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL) SetAttribute(attribute UINTN) EFI_STATUS {
-	return UefiCall2(p.setAttribute, uintptr(unsafe.Pointer(p)), uintptr(attribute))
-}
-
-func (p *EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL) ClearScreen() EFI_STATUS {
-	return UefiCall1(p.clearScreen, uintptr(unsafe.Pointer(p)))
-}
-
-func (p *EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL) SetCursorPosition(column UINTN, row UINTN) EFI_STATUS {
-	return UefiCall3(p.setCursorPosition, uintptr(unsafe.Pointer(p)), uintptr(column), uintptr(row))
-}
-
-func (p *EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL) EnableCursor(visible BOOLEAN) EFI_STATUS {
-	return UefiCall2(p.enableCursor, uintptr(unsafe.Pointer(p)), booleanArg(visible))
-}

src/device/uefi/tables.go

@@ -1,123 +0,0 @@
-package uefi
-
-import "unsafe"
-
-type EFI_RUNTIME_SERVICES struct {
-	Hdr                  EFI_TABLE_HEADER
-	getTime              uintptr
-	setTime              uintptr
-	getWakeupTime        uintptr
-	setWakeupTime        uintptr
-	setVirtualAddressMap uintptr
-	convertPointer       uintptr
-	getVariable          uintptr
-	getNextVariableName  uintptr
-	setVariable          uintptr
-	getNextHighMonoCount uintptr
-	resetSystem          uintptr
-	updateCapsule        uintptr
-	queryCapsuleCaps     uintptr
-	queryVariableInfo    uintptr
-}
-
-type EFI_BOOT_SERVICES struct {
-	Hdr                       EFI_TABLE_HEADER
-	raiseTPL                  uintptr
-	restoreTPL                uintptr
-	allocatePages             uintptr
-	freePages                 uintptr
-	getMemoryMap              uintptr
-	allocatePool              uintptr
-	freePool                  uintptr
-	createEvent               uintptr
-	setTimer                  uintptr
-	waitForEvent              uintptr
-	signalEvent               uintptr
-	closeEvent                uintptr
-	checkEvent                uintptr
-	installProtocolInterface  uintptr
-	reinstallProtocolIFace    uintptr
-	uninstallProtocolIFace    uintptr
-	handleProtocol            uintptr
-	reserved                  *VOID
-	registerProtocolNotify    uintptr
-	locateHandle              uintptr
-	locateDevicePath          uintptr
-	installConfigurationTable uintptr
-	loadImage                 uintptr
-	startImage                uintptr
-	exit                      uintptr
-	unloadImage               uintptr
-	exitBootServices          uintptr
-	getNextMonotonicCount     uintptr
-	stall                     uintptr
-	setWatchdogTimer          uintptr
-	connectController         uintptr
-	disconnectController      uintptr
-	openProtocol              uintptr
-	closeProtocol             uintptr
-	openProtocolInformation   uintptr
-	protocolsPerHandle        uintptr
-	locateHandleBuffer        uintptr
-	locateProtocol            uintptr
-}
-
-func (p *EFI_BOOT_SERVICES) AllocatePages(typ EFI_ALLOCATE_TYPE, memoryType EFI_MEMORY_TYPE, pages UINTN, memory *EFI_PHYSICAL_ADDRESS) EFI_STATUS {
-	return UefiCall4(p.allocatePages, uintptr(typ), uintptr(memoryType), uintptr(pages), uintptr(unsafe.Pointer(memory)))
-}
-
-func (p *EFI_BOOT_SERVICES) FreePages(memory EFI_PHYSICAL_ADDRESS, pages UINTN) EFI_STATUS {
-	return UefiCall2(p.freePages, uintptr(memory), uintptr(pages))
-}
-
-func (p *EFI_BOOT_SERVICES) CreateEvent(typ EVENT_TYPE, notifyTPL EFI_TPL, notifyFunction unsafe.Pointer, notifyContext unsafe.Pointer, event *EFI_EVENT) EFI_STATUS {
-	return UefiCall5(p.createEvent, uintptr(typ), uintptr(notifyTPL), uintptr(notifyFunction), uintptr(notifyContext), uintptr(unsafe.Pointer(event)))
-}
-
-func (p *EFI_BOOT_SERVICES) SetTimer(event EFI_EVENT, typ EFI_TIMER_DELAY, triggerTime uint64) EFI_STATUS {
-	return UefiCall3(p.setTimer, uintptr(event), uintptr(typ), uintptr(triggerTime))
-}
-
-func (p *EFI_BOOT_SERVICES) WaitForEvent(numberOfEvents UINTN, event *EFI_EVENT, index *UINTN) EFI_STATUS {
-	return UefiCall3(p.waitForEvent, uintptr(numberOfEvents), uintptr(unsafe.Pointer(event)), uintptr(unsafe.Pointer(index)))
-}
-
-func (p *EFI_BOOT_SERVICES) CloseEvent(event EFI_EVENT) EFI_STATUS {
-	return UefiCall1(p.closeEvent, uintptr(event))
-}
-
-func (p *EFI_BOOT_SERVICES) CheckEvent(event EFI_EVENT) EFI_STATUS {
-	return UefiCall1(p.checkEvent, uintptr(event))
-}
-
-func (p *EFI_BOOT_SERVICES) HandleProtocol(handle EFI_HANDLE, protocol *EFI_GUID, iface unsafe.Pointer) EFI_STATUS {
-	return UefiCall3(p.handleProtocol, uintptr(handle), uintptr(unsafe.Pointer(protocol)), uintptr(iface))
-}
-
-func (p *EFI_BOOT_SERVICES) LocateProtocol(protocol *EFI_GUID, registration *VOID, iface unsafe.Pointer) EFI_STATUS {
-	return UefiCall3(p.locateProtocol, uintptr(unsafe.Pointer(protocol)), uintptr(unsafe.Pointer(registration)), uintptr(iface))
-}
-
-func (p *EFI_BOOT_SERVICES) Exit(imageHandle EFI_HANDLE, exitStatus EFI_STATUS, exitDataSize UINTN, exitData *CHAR16) EFI_STATUS {
-	return UefiCall4(p.exit, uintptr(imageHandle), uintptr(exitStatus), uintptr(exitDataSize), uintptr(unsafe.Pointer(exitData)))
-}
-
-func (p *EFI_BOOT_SERVICES) SetWatchdogTimer(timeout UINTN, watchdogCode uint64, dataSize UINTN, watchdogData *CHAR16) EFI_STATUS {
-	return UefiCall4(p.setWatchdogTimer, uintptr(timeout), uintptr(watchdogCode), uintptr(dataSize), uintptr(unsafe.Pointer(watchdogData)))
-}
-
-type EFI_SYSTEM_TABLE struct {
-	Hdr                  EFI_TABLE_HEADER
-	FirmwareVendor       *CHAR16
-	FirmwareRevision     uint32
-	ConsoleInHandle      EFI_HANDLE
-	ConIn                *VOID
-	ConsoleOutHandle     EFI_HANDLE
-	ConOut               *EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL
-	StandardErrorHandle  EFI_HANDLE
-	StdErr               *EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL
-	RuntimeServices      *EFI_RUNTIME_SERVICES
-	BootServices         *EFI_BOOT_SERVICES
-	NumberOfTableEntries UINTN
-	ConfigurationTable   *VOID
-}

src/device/uefi/text_output.go

@@ -1,41 +0,0 @@
-package uefi
-
-import "errors"
-
-var errNilTextOutputProtocol = errors.New("uefi: nil simple text output protocol")
-
-type TextOutput struct {
-	proto *EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL
-}
-
-func NewTextOutput(proto *EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL) *TextOutput {
-	return &TextOutput{proto: proto}
-}
-
-func ConsoleOut() *TextOutput {
-	return NewTextOutput(ST().ConOut)
-}
-
-func StandardError() *TextOutput {
-	return NewTextOutput(ST().StdErr)
-}
-
-func (w *TextOutput) Write(p []byte) (int, error) {
-	if w == nil || w.proto == nil {
-		return 0, errNilTextOutputProtocol
-	}
-	if len(p) == 0 {
-		return 0, nil
-	}
-
-	buf := StringToCHAR16Z(string(p))
-	status := w.proto.OutputString(&buf[0])
-	if status != EFI_SUCCESS {
-		return 0, StatusError(status)
-	}
-	return len(p), nil
-}
-
-func (w *TextOutput) WriteString(s string) (int, error) {
-	return w.Write([]byte(s))
-}

src/device/uefi/util.go

@@ -1,29 +0,0 @@
-//go:build uefi
-
-package uefi
-
-import "unsafe"
-
-var systemTable *EFI_SYSTEM_TABLE
-var imageHandle uintptr
-
-//go:nobounds
-func Init(argImageHandle uintptr, argSystemTable uintptr) {
-	systemTable = (*EFI_SYSTEM_TABLE)(unsafe.Pointer(argSystemTable))
-	imageHandle = argImageHandle
-}
-
-func ST() *EFI_SYSTEM_TABLE {
-	return systemTable
-}
-
-func BS() *EFI_BOOT_SERVICES {
-	if systemTable == nil {
-		return nil
-	}
-	return systemTable.BootServices
-}
-
-func GetImageHandle() EFI_HANDLE {
-	return EFI_HANDLE(imageHandle)
-}

src/examples/hid-keyboard/main.go

@@ -22,7 +22,6 @@ func main() {
 	button.Configure(machine.PinConfig{Mode: machine.PinInputPullup})
 
 	kb := keyboard.Port()
-	machine.USBDev.Configure(machine.UARTConfig{}) // no-op if already init'd by serial.usb
 
 	for {
 		if !button.Get() {

src/examples/memstats/memstats.go

@@ -25,7 +25,7 @@ func main() {
 func escapesToHeap() {
 	n := rand.Intn(100)
 	println("Doing ", n, " iterations")
-	for i := range n {
+	for i := 0; i < n; i++ {
 		s := make([]byte, i)
 		_ = append(s, 42)
 	}

src/examples/test/test.go

@@ -70,7 +70,7 @@ func main() {
 	printItf(Number(3))
 	s := Stringer(thing)
 	println("Stringer.String():", s.String())
-	var itf any = s
+	var itf interface{} = s
 	println("Stringer.(*Thing).String():", itf.(Stringer).String())
 
 	// unusual calls
@@ -124,7 +124,7 @@ func strlen(s string) int {
 	return len(s)
 }
 
-func printItf(val any) {
+func printItf(val interface{}) {
 	switch val := val.(type) {
 	case Doubler:
 		println("is Doubler:", val.Double())

src/examples/usb-storage/main.go

@@ -6,85 +6,8 @@ import (
 	"time"
 )
 
-// Disk geometry.
-const (
-	sectorSize  = 512
-	diskSectors = 128 // 64 KB total
-)
-
-var diskData [diskSectors * sectorSize]byte
-
-type ramDisk struct{}
-
-func (r *ramDisk) ReadAt(p []byte, off int64) (int, error) {
-	return copy(p, diskData[off:]), nil
-}
-
-func (r *ramDisk) WriteAt(p []byte, off int64) (int, error) {
-	return copy(diskData[off:], p), nil
-}
-
-func (r *ramDisk) Size() int64                        { return int64(diskSectors * sectorSize) }
-func (r *ramDisk) WriteBlockSize() int64              { return sectorSize }
-func (r *ramDisk) EraseBlockSize() int64              { return sectorSize }
-func (r *ramDisk) EraseBlocks(start, len int64) error { return nil }
-
-func init() {
-	formatFAT12(diskData[:])
-}
-
-// formatFAT12 writes a minimal FAT12 volume boot record and FAT tables so the
-// host OS can mount the disk without reformatting.
-func formatFAT12(d []byte) {
-	// --- Sector 0: Volume Boot Record ---
-	s := d[0:]
-	s[0] = 0xEB
-	s[1] = 0x3C
-	s[2] = 0x90 // short JMP + NOP
-	copy(s[3:11], "MSDOS5.0")
-	// BPB fields (little-endian)
-	s[11] = 0x00
-	s[12] = 0x02 // bytesPerSector = 512
-	s[13] = 0x01 // sectorsPerCluster = 1
-	s[14] = 0x01
-	s[15] = 0x00 // reservedSectors = 1
-	s[16] = 0x02 // numFATs = 2
-	s[17] = 0x20
-	s[18] = 0x00 // rootEntryCount = 32
-	s[19] = 0x80
-	s[20] = 0x00 // totalSectors16 = 128
-	s[21] = 0xF8 // mediaType = fixed disk
-	s[22] = 0x01
-	s[23] = 0x00 // sectorsPerFAT = 1
-	s[24] = 0x80
-	s[25] = 0x00 // sectorsPerTrack = 128
-	s[26] = 0x01
-	s[27] = 0x00 // numHeads = 1
-	// hiddenSectors[28:32] = 0
-	// totalSectors32[32:36] = 0
-	s[38] = 0x29 // extBootSig
-	s[39] = 0x47
-	s[40] = 0x4F
-	s[41] = 0x30
-	s[42] = 0x31                  // volumeID "GO01"
-	copy(s[43:54], "TINYGO     ") // volumeLabel (11 bytes)
-	copy(s[54:62], "FAT12   ")    // fsType
-	s[510] = 0x55
-	s[511] = 0xAA // boot sector signature
-
-	// --- Sector 1: FAT1 ---
-	// Entry 0 = 0xFF8 (media byte), entry 1 = 0xFFF (EOC); all others = free.
-	d[512] = 0xF8
-	d[513] = 0xFF
-	d[514] = 0xFF
-
-	// --- Sector 2: FAT2 (identical copy) ---
-	copy(d[1024:1027], d[512:515])
-}
-
 func main() {
-	msc.Port(&ramDisk{})
+	msc.Port(machine.Flash)
-	machine.USBDev.Configure(machine.UARTConfig{})
 
 	for {
 		time.Sleep(2 * time.Second)

src/internal/bytealg/bytealg.go

@@ -45,8 +45,11 @@ func Compare(a, b []byte) int {
 // This function was copied from the Go 1.23 source tree (with runtime_cmpstring
 // manually inlined).
 func CompareString(a, b string) int {
-	l := min(len(b), len(a))
+	l := len(a)
-	for i := range l {
+	if len(b) < l {
+		l = len(b)
+	}
+	for i := 0; i < l; i++ {
 		c1, c2 := a[i], b[i]
 		if c1 < c2 {
 			return -1
@@ -167,7 +170,7 @@ const PrimeRK = 16777619
 // This function was removed in Go 1.22.
 func HashStrBytes(sep []byte) (uint32, uint32) {
 	hash := uint32(0)
-	for i := range sep {
+	for i := 0; i < len(sep); i++ {
 		hash = hash*PrimeRK + uint32(sep[i])
 	}
 	var pow, sq uint32 = 1, PrimeRK
@@ -246,7 +249,7 @@ func IndexRabinKarpBytes(s, sep []byte) int {
 	hashsep, pow := HashStrBytes(sep)
 	n := len(sep)
 	var h uint32
-	for i := range n {
+	for i := 0; i < n; i++ {
 		h = h*PrimeRK + uint32(s[i])
 	}
 	if h == hashsep && Equal(s[:n], sep) {
@@ -273,7 +276,7 @@ func IndexRabinKarp[T string | []byte](s, sep T) int {
 	hashss, pow := HashStr(sep)
 	n := len(sep)
 	var h uint32
-	for i := range n {
+	for i := 0; i < n; i++ {
 		h = h*PrimeRK + uint32(s[i])
 	}
 	if h == hashss && string(s[:n]) == string(sep) {

src/internal/cm/case.go

@@ -12,8 +12,8 @@ func CaseUnmarshaler[T ~uint8 | ~uint16 | ~uint32](cases []string) func(v *T, te
 				return &emptyTextError{}
 			}
 			s := string(text)
-			for i, c := range cases {
+			for i := 0; i < len(cases); i++ {
-				if c == s {
+				if cases[i] == s {
 					*v = T(i)
 					return nil
 				}

src/internal/cm/hostlayout_go122.go

@@ -0,0 +1,11 @@
+//go:build !go1.23
+
+package cm
+
+// HostLayout marks a struct as using host memory layout.
+// See [structs.HostLayout] in Go 1.23 or later.
+type HostLayout struct {
+	_ hostLayout // prevent accidental conversion with plain struct{}
+}
+
+type hostLayout struct{}

src/internal/cm/hostlayout_go123.go

@@ -1,3 +1,5 @@
+//go:build go1.23
+
 package cm
 
 import "structs"