builder: build SSA before compiling packages

.github/workflows/build-macos.yml

@@ -40,7 +40,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v6
         with:
-          go-version: '1.27.0-rc.3'
+          go-version: '1.27.0-rc.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: '1.27.0-rc.3'
+          go-version: '1.27.0-rc.2'
           cache: true
       - name: Build TinyGo (LLVM ${{ matrix.version }})
         run: go install -tags=llvm${{ matrix.version }}

.github/workflows/linux.yml

@@ -23,7 +23,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v6
         with:
-          go-version: '1.27.0-rc.3'
+          go-version: '1.27.0-rc.2'
           cache: true
       - name: Run go mod tidy
         run: go mod tidy
@@ -36,7 +36,7 @@ jobs:
     # statically linked binary.
     runs-on: ubuntu-latest
     container:
-      image: golang:1.27rc3-alpine
+      image: golang:1.27rc2-alpine
     outputs:
       version: ${{ steps.version.outputs.version }}
     steps:
@@ -160,7 +160,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v6
         with:
-          go-version: '1.27.0-rc.3'
+          go-version: '1.27.0-rc.2'
           cache: true
       - name: Install wasmtime
         uses: bytecodealliance/actions/wasmtime/setup@v1
@@ -204,7 +204,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v6
         with:
-          go-version: '1.27.0-rc.3'
+          go-version: '1.27.0-rc.2'
           cache: true
       - name: Install Node.js
         uses: actions/setup-node@v6
@@ -323,7 +323,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v6
         with:
-          go-version: '1.27.0-rc.3'
+          go-version: '1.27.0-rc.2'
           cache: true
       - name: Restore LLVM source cache
         uses: actions/cache/restore@v5

.github/workflows/windows.yml

@@ -34,7 +34,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v6
         with:
-          go-version: '1.27.0-rc.3'
+          go-version: '1.27.0-rc.2'
           cache: true
       - name: Restore cached LLVM source
         uses: actions/cache/restore@v5
@@ -129,7 +129,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v6
         with:
-          go-version: '1.27.0-rc.3'
+          go-version: '1.27.0-rc.2'
           cache: true
       - name: Download TinyGo build
         uses: actions/download-artifact@v8
@@ -150,7 +150,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v6
         with:
-          go-version: '1.27.0-rc.3'
+          go-version: '1.27.0-rc.2'
           cache: true
       - name: Download TinyGo build
         uses: actions/download-artifact@v8
@@ -176,7 +176,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v6
         with:
-          go-version: '1.27.0-rc.3'
+          go-version: '1.27.0-rc.2'
           cache: true
       - name: Download TinyGo build
         uses: actions/download-artifact@v8

Dockerfile

@@ -1,5 +1,5 @@
 # tinygo-llvm stage obtains the llvm source for TinyGo
-FROM golang:1.27rc3 AS tinygo-llvm
+FROM golang:1.27rc2 AS tinygo-llvm
 
 RUN apt-get update && \
     apt-get install -y apt-utils make cmake clang-17 ninja-build && \
@@ -33,7 +33,7 @@ RUN cd /tinygo/ && \
 
 # tinygo-compiler copies the compiler build over to a base Go container (without
 # all the build tools etc).
-FROM golang:1.27rc3 AS tinygo-compiler
+FROM golang:1.27rc2 AS tinygo-compiler
 
 # Copy tinygo build.
 COPY --from=tinygo-compiler-build /tinygo/build/release/tinygo /tinygo

builder/build.go

@@ -24,6 +24,7 @@ import (
 	"sort"
 	"strconv"
 	"strings"
+	"sync"
 
 	"github.com/gofrs/flock"
 	"github.com/tinygo-org/tinygo/compileopts"
@@ -269,6 +270,7 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 	// Create the *ssa.Program. This does not yet build the entire SSA of the
 	// program so it's pretty fast and doesn't need to be parallelized.
 	program := lprogram.LoadSSA()
+	buildProgram := sync.OnceFunc(program.Build)
 
 	// Add jobs to compile each package.
 	// Packages that have a cache hit will not be compiled again.
@@ -398,8 +400,13 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 					return nil
 				}
 
-				// Compile AST to IR. The compiler.CompilePackage function will
-				// build the SSA as needed.
+				// SSA package builds may run concurrently, but the resulting
+				// functions cannot be inspected until all builds have finished:
+				// generic instances and wrappers can be shared across packages.
+				// Build the whole program once before compiling any package.
+				buildProgram()
+
+				// Compile AST to IR.
 				mod, errs := compiler.CompilePackage(pkg.ImportPath, pkg, program.Package(pkg.Pkg), machine, compilerConfig, config.DumpSSA())
 				defer mod.Context().Dispose()
 				defer mod.Dispose()

compiler/compiler.go

@@ -296,6 +296,9 @@ func Sizes(machine llvm.TargetMachine) types.Sizes {
 }
 
 // CompilePackage compiles a single package to a LLVM module.
+//
+// The SSA package must already be built. When packages are compiled
+// concurrently, the entire SSA program must be built before compilation starts.
 func CompilePackage(moduleName string, pkg *loader.Package, ssaPkg *ssa.Package, machine llvm.TargetMachine, config *Config, dumpSSA bool) (llvm.Module, []error) {
 	c := newCompilerContext(moduleName, machine, config, dumpSSA)
 	defer c.dispose()
@@ -306,9 +309,6 @@ func CompilePackage(moduleName string, pkg *loader.Package, ssaPkg *ssa.Package,
 	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.

compiler/compiler_test.go

@@ -115,7 +115,7 @@ func TestCompiler(t *testing.T) {
 
 			// Update test if needed. Do not check the result.
 			if *flagUpdate {
-				err := os.WriteFile(outPath, []byte(mod.String()), 0666)
+				err := os.WriteFile(outPath, []byte(normalizeIR(mod.String())), 0666)
 				if err != nil {
 					t.Error("failed to write updated output file:", err)
 				}
@@ -174,9 +174,8 @@ func TestOptimizedLargeAggregateABI(t *testing.T) {
 	}
 }
 
-// normalizeIR canonicalizes LLVM IR so a single golden file keeps matching
-// across LLVM versions. Golden files are written against LLVM <21; newer LLVM
-// prints some attributes differently.
+// normalizeIR canonicalizes LLVM-version-specific IR spellings for comparison
+// and when regenerating golden files.
 func normalizeIR(s string) string {
 	// Golden files are written using the pre-LLVM21 'nocapture' spelling,
 	// which LLVM printed before any co-occurring attribute such as
@@ -414,5 +413,7 @@ func testCompilePackage(t *testing.T, options *compileopts.Options, file string)
 	// Compile AST to IR.
 	program := lprogram.LoadSSA()
 	pkg := lprogram.MainPkg()
-	return CompilePackage(file, pkg, program.Package(pkg.Pkg), machine, compilerConfig, false)
+	ssaPkg := program.Package(pkg.Pkg)
+	ssaPkg.Build()
+	return CompilePackage(file, pkg, ssaPkg, machine, compilerConfig, false)
 }

compiler/testdata/channel.ll

@@ -19,33 +19,33 @@ define hidden void @main.chanIntSend(ptr dereferenceable_or_null(36) %ch, ptr %c
 entry:
   %chan.op = alloca %runtime.channelOp, align 8
   %chan.value = alloca i32, align 4
-  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %chan.value)
+  call void @llvm.lifetime.start.p0(ptr nonnull %chan.value)
   store i32 3, ptr %chan.value, align 4
-  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %chan.op)
+  call void @llvm.lifetime.start.p0(ptr nonnull %chan.op)
   call void @runtime.chanSend(ptr %ch, ptr nonnull %chan.value, ptr nonnull %chan.op, ptr undef) #3
-  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %chan.op)
-  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %chan.value)
+  call void @llvm.lifetime.end.p0(ptr nonnull %chan.op)
+  call void @llvm.lifetime.end.p0(ptr nonnull %chan.value)
   ret void
 }
 
 ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
-declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2
+declare void @llvm.lifetime.start.p0(ptr nocapture) #2
 
 declare void @runtime.chanSend(ptr dereferenceable_or_null(36), ptr, ptr dereferenceable_or_null(16), ptr) #0
 
 ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
-declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2
+declare void @llvm.lifetime.end.p0(ptr nocapture) #2
 
 ; Function Attrs: nounwind
 define hidden void @main.chanIntRecv(ptr dereferenceable_or_null(36) %ch, ptr %context) unnamed_addr #1 {
 entry:
   %chan.op = alloca %runtime.channelOp, align 8
   %chan.value = alloca i32, align 4
-  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %chan.value)
-  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %chan.op)
+  call void @llvm.lifetime.start.p0(ptr nonnull %chan.value)
+  call void @llvm.lifetime.start.p0(ptr nonnull %chan.op)
   %0 = call i1 @runtime.chanRecv(ptr %ch, ptr nonnull %chan.value, ptr nonnull %chan.op, ptr undef) #3
-  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %chan.value)
-  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %chan.op)
+  call void @llvm.lifetime.end.p0(ptr nonnull %chan.value)
+  call void @llvm.lifetime.end.p0(ptr nonnull %chan.op)
   ret void
 }
 
@@ -55,9 +55,9 @@ declare i1 @runtime.chanRecv(ptr dereferenceable_or_null(36), ptr, ptr dereferen
 define hidden void @main.chanZeroSend(ptr dereferenceable_or_null(36) %ch, ptr %context) unnamed_addr #1 {
 entry:
   %chan.op = alloca %runtime.channelOp, align 8
-  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %chan.op)
+  call void @llvm.lifetime.start.p0(ptr nonnull %chan.op)
   call void @runtime.chanSend(ptr %ch, ptr null, ptr nonnull %chan.op, ptr undef) #3
-  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %chan.op)
+  call void @llvm.lifetime.end.p0(ptr nonnull %chan.op)
   ret void
 }
 
@@ -65,9 +65,9 @@ entry:
 define hidden void @main.chanZeroRecv(ptr dereferenceable_or_null(36) %ch, ptr %context) unnamed_addr #1 {
 entry:
   %chan.op = alloca %runtime.channelOp, align 8
-  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %chan.op)
+  call void @llvm.lifetime.start.p0(ptr nonnull %chan.op)
   %0 = call i1 @runtime.chanRecv(ptr %ch, ptr null, ptr nonnull %chan.op, ptr undef) #3
-  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %chan.op)
+  call void @llvm.lifetime.end.p0(ptr nonnull %chan.op)
   ret void
 }
 
@@ -77,7 +77,7 @@ entry:
   %select.states.alloca = alloca [2 x %runtime.chanSelectState], align 8
   %select.send.value = alloca i32, align 4
   store i32 1, ptr %select.send.value, align 4
-  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %select.states.alloca)
+  call void @llvm.lifetime.start.p0(ptr nonnull %select.states.alloca)
   store ptr %ch1, ptr %select.states.alloca, align 4
   %select.states.alloca.repack1 = getelementptr inbounds nuw i8, ptr %select.states.alloca, i32 4
   store ptr %select.send.value, ptr %select.states.alloca.repack1, align 4
@@ -86,7 +86,7 @@ entry:
   %.repack3 = getelementptr inbounds nuw i8, ptr %select.states.alloca, i32 12
   store ptr null, ptr %.repack3, align 4
   %select.result = call { i32, i1 } @runtime.chanSelect(ptr undef, ptr nonnull %select.states.alloca, i32 2, i32 2, ptr null, i32 0, i32 0, ptr undef) #3
-  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %select.states.alloca)
+  call void @llvm.lifetime.end.p0(ptr nonnull %select.states.alloca)
   %1 = extractvalue { i32, i1 } %select.result, 0
   %2 = icmp eq i32 %1, 0
   br i1 %2, label %select.done, label %select.next

compiler/testdata/large.ll

@@ -15,7 +15,7 @@ target triple = "wasm32-unknown-wasi"
 @"reflect/types.type:basic:string" = linkonce_odr constant { i8, ptr } { i8 81, ptr @"reflect/types.type:pointer:basic:string" }, align 4
 @"reflect/types.type:pointer:basic:string" = linkonce_odr constant { i8, i16, ptr } { i8 -43, i16 0, ptr @"reflect/types.type:basic:string" }, align 4
 
-declare void @runtime.trackPointer(ptr readonly captures(none), ptr, ptr) #0
+declare void @runtime.trackPointer(ptr nocapture readonly, ptr, ptr) #0
 
 ; Function Attrs: nounwind
 define hidden void @main.init(ptr %context) unnamed_addr #1 {
@@ -31,7 +31,7 @@ entry:
 }
 
 ; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
-declare void @llvm.memcpy.p0.p0.i32(ptr noalias writeonly captures(none), ptr noalias readonly captures(none), i32, i1 immarg) #2
+declare void @llvm.memcpy.p0.p0.i32(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i32, i1 immarg) #2
 
 ; Function Attrs: nounwind
 define hidden i8 @"(main.largeReceiver).readLargeValue"(ptr readonly dereferenceable_or_null(1025) %receiver, ptr readonly dereferenceable_or_null(1025) %value, ptr %context) unnamed_addr #1 {
@@ -344,7 +344,7 @@ if.then:                                          ; preds = %typeassert.next
 declare i1 @runtime.typeAssert(ptr, ptr dereferenceable_or_null(1), ptr) #0
 
 ; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
-declare void @llvm.memset.p0.i32(ptr writeonly captures(none), i8, i32, i1 immarg) #7
+declare void @llvm.memset.p0.i32(ptr nocapture writeonly, i8, i32, i1 immarg) #7
 
 ; Function Attrs: nounwind
 define hidden i8 @main.useLargeMap(ptr readonly dereferenceable_or_null(1025) %key, ptr readonly dereferenceable_or_null(1025) %value, ptr %context) unnamed_addr #1 {
@@ -423,12 +423,12 @@ if.then:                                          ; preds = %entry
 }
 
 ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
-declare void @llvm.lifetime.start.p0(ptr captures(none)) #8
+declare void @llvm.lifetime.start.p0(ptr nocapture) #8
 
 declare void @runtime.chanSend(ptr dereferenceable_or_null(36), ptr, ptr dereferenceable_or_null(16), ptr) #0
 
 ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
-declare void @llvm.lifetime.end.p0(ptr captures(none)) #8
+declare void @llvm.lifetime.end.p0(ptr nocapture) #8
 
 declare i1 @runtime.chanRecv(ptr dereferenceable_or_null(36), ptr, ptr dereferenceable_or_null(16), ptr) #0
 

compiler/testdata/zeromap.ll

@@ -21,23 +21,23 @@ entry:
   %0 = insertvalue %main.hasPadding zeroinitializer, i1 %s.b1, 0
   %1 = insertvalue %main.hasPadding %0, i32 %s.i, 1
   %2 = insertvalue %main.hasPadding %1, i1 %s.b2, 2
-  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %hashmap.value)
-  call void @llvm.lifetime.start.p0(i64 12, ptr nonnull %hashmap.key)
+  call void @llvm.lifetime.start.p0(ptr nonnull %hashmap.value)
+  call void @llvm.lifetime.start.p0(ptr nonnull %hashmap.key)
   store %main.hasPadding %2, ptr %hashmap.key, align 4
   %3 = call i1 @runtime.hashmapGenericGet(ptr %m, ptr nonnull %hashmap.key, ptr nonnull %hashmap.value, i32 4, ptr undef) #4
-  call void @llvm.lifetime.end.p0(i64 12, ptr nonnull %hashmap.key)
+  call void @llvm.lifetime.end.p0(ptr nonnull %hashmap.key)
   %4 = load i32, ptr %hashmap.value, align 4
-  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %hashmap.value)
+  call void @llvm.lifetime.end.p0(ptr nonnull %hashmap.value)
   ret i32 %4
 }
 
 ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
-declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #3
+declare void @llvm.lifetime.start.p0(ptr nocapture) #3
 
 declare i1 @runtime.hashmapGenericGet(ptr dereferenceable_or_null(48), ptr nocapture, ptr nocapture, i32, ptr) #0
 
 ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
-declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #3
+declare void @llvm.lifetime.end.p0(ptr nocapture) #3
 
 ; Function Attrs: noinline nounwind
 define hidden void @main.testZeroSet(ptr dereferenceable_or_null(48) %m, i1 %s.b1, i32 %s.i, i1 %s.b2, ptr %context) unnamed_addr #2 {
@@ -47,13 +47,13 @@ entry:
   %0 = insertvalue %main.hasPadding zeroinitializer, i1 %s.b1, 0
   %1 = insertvalue %main.hasPadding %0, i32 %s.i, 1
   %2 = insertvalue %main.hasPadding %1, i1 %s.b2, 2
-  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %hashmap.value)
+  call void @llvm.lifetime.start.p0(ptr nonnull %hashmap.value)
   store i32 5, ptr %hashmap.value, align 4
-  call void @llvm.lifetime.start.p0(i64 12, ptr nonnull %hashmap.key)
+  call void @llvm.lifetime.start.p0(ptr nonnull %hashmap.key)
   store %main.hasPadding %2, ptr %hashmap.key, align 4
   call void @runtime.hashmapGenericSet(ptr %m, ptr nonnull %hashmap.key, ptr nonnull %hashmap.value, ptr undef) #4
-  call void @llvm.lifetime.end.p0(i64 12, ptr nonnull %hashmap.key)
-  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %hashmap.value)
+  call void @llvm.lifetime.end.p0(ptr nonnull %hashmap.key)
+  call void @llvm.lifetime.end.p0(ptr nonnull %hashmap.value)
   ret void
 }
 
@@ -64,17 +64,17 @@ define hidden i32 @main.testZeroArrayGet(ptr dereferenceable_or_null(48) %m, [2
 entry:
   %hashmap.key = alloca [2 x %main.hasPadding], align 8
   %hashmap.value = alloca i32, align 4
-  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %hashmap.value)
-  call void @llvm.lifetime.start.p0(i64 24, ptr nonnull %hashmap.key)
+  call void @llvm.lifetime.start.p0(ptr nonnull %hashmap.value)
+  call void @llvm.lifetime.start.p0(ptr nonnull %hashmap.key)
   %s.elt = extractvalue [2 x %main.hasPadding] %s, 0
   store %main.hasPadding %s.elt, ptr %hashmap.key, align 4
   %hashmap.key.repack1 = getelementptr inbounds nuw i8, ptr %hashmap.key, i32 12
   %s.elt2 = extractvalue [2 x %main.hasPadding] %s, 1
   store %main.hasPadding %s.elt2, ptr %hashmap.key.repack1, align 4
   %0 = call i1 @runtime.hashmapGenericGet(ptr %m, ptr nonnull %hashmap.key, ptr nonnull %hashmap.value, i32 4, ptr undef) #4
-  call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %hashmap.key)
+  call void @llvm.lifetime.end.p0(ptr nonnull %hashmap.key)
   %1 = load i32, ptr %hashmap.value, align 4
-  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %hashmap.value)
+  call void @llvm.lifetime.end.p0(ptr nonnull %hashmap.value)
   ret i32 %1
 }
 
@@ -83,17 +83,17 @@ define hidden void @main.testZeroArraySet(ptr dereferenceable_or_null(48) %m, [2
 entry:
   %hashmap.key = alloca [2 x %main.hasPadding], align 8
   %hashmap.value = alloca i32, align 4
-  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %hashmap.value)
+  call void @llvm.lifetime.start.p0(ptr nonnull %hashmap.value)
   store i32 5, ptr %hashmap.value, align 4
-  call void @llvm.lifetime.start.p0(i64 24, ptr nonnull %hashmap.key)
+  call void @llvm.lifetime.start.p0(ptr nonnull %hashmap.key)
   %s.elt = extractvalue [2 x %main.hasPadding] %s, 0
   store %main.hasPadding %s.elt, ptr %hashmap.key, align 4
   %hashmap.key.repack1 = getelementptr inbounds nuw i8, ptr %hashmap.key, i32 12
   %s.elt2 = extractvalue [2 x %main.hasPadding] %s, 1
   store %main.hasPadding %s.elt2, ptr %hashmap.key.repack1, align 4
   call void @runtime.hashmapGenericSet(ptr %m, ptr nonnull %hashmap.key, ptr nonnull %hashmap.value, ptr undef) #4
-  call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %hashmap.key)
-  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %hashmap.value)
+  call void @llvm.lifetime.end.p0(ptr nonnull %hashmap.key)
+  call void @llvm.lifetime.end.p0(ptr nonnull %hashmap.value)
   ret void
 }
 

transform/transform_test.go

@@ -76,7 +76,7 @@ func testTransform(t *testing.T, pathPrefix string, transform func(mod llvm.Modu
 	actual = actual[strings.Index(actual, "\ntarget datalayout = ")+1:]
 
 	if *update {
-		err := os.WriteFile(pathPrefix+".out.ll", []byte(actual), 0666)
+		err := os.WriteFile(pathPrefix+".out.ll", []byte(normalizeIR(actual)), 0666)
 		if err != nil {
 			t.Error("failed to write out new output:", err)
 		}
@@ -100,28 +100,8 @@ func testTransform(t *testing.T, pathPrefix string, transform func(mod llvm.Modu
 // equal. That means, only relevant lines are compared (excluding comments
 // etc.).
 func fuzzyEqualIR(s1, s2 string) bool {
-	// Golden files are written using the pre-LLVM21 'nocapture' spelling,
-	// which LLVM printed before any co-occurring attribute such as
-	// 'readonly' (e.g. "ptr nocapture readonly"). LLVM 21+ prints the
-	// equivalent 'captures(none)' instead, and after such attributes (e.g.
-	// "ptr readonly captures(none)"). Normalize both name and position back
-	// to the old spelling to keep a single golden file working across LLVM
-	// versions.
-	s1 = normalizeCapturesAttr(s1)
-	s2 = normalizeCapturesAttr(s2)
-
-	// LLVM 21+ also added an explicit 'nocreateundeforpoison' attribute to
-	// certain intrinsic declarations (e.g. llvm.umin) that were implicitly
-	// assumed not to create undef/poison before. It's unrelated to the
-	// escape-analysis behavior under test, so ignore it for comparison.
-	s1 = strings.ReplaceAll(s1, "nocreateundeforpoison ", "")
-	s2 = strings.ReplaceAll(s2, "nocreateundeforpoison ", "")
-
-	// LLVM 22 dropped the (redundant) i64 size argument from
-	// llvm.lifetime.start/end. Normalize away that argument so golden files
-	// written against the two-argument form still match.
-	s1 = lifetimeSizeArgRe.ReplaceAllString(s1, "$1")
-	s2 = lifetimeSizeArgRe.ReplaceAllString(s2, "$1")
+	s1 = normalizeIR(s1)
+	s2 = normalizeIR(s2)
 
 	lines1 := filterIrrelevantIRLines(strings.Split(s1, "\n"))
 	lines2 := filterIrrelevantIRLines(strings.Split(s2, "\n"))
@@ -138,6 +118,29 @@ func fuzzyEqualIR(s1, s2 string) bool {
 	return true
 }
 
+func normalizeIR(s string) string {
+	// Golden files are written using the pre-LLVM21 'nocapture' spelling,
+	// which LLVM printed before any co-occurring attribute such as
+	// 'readonly' (e.g. "ptr nocapture readonly"). LLVM 21+ prints the
+	// equivalent 'captures(none)' instead, and after such attributes (e.g.
+	// "ptr readonly captures(none)"). Normalize both name and position back
+	// to the old spelling.
+	s = normalizeCapturesAttr(s)
+
+	// LLVM 21+ also added an explicit 'nocreateundeforpoison' attribute to
+	// certain intrinsic declarations (e.g. llvm.umin) that were implicitly
+	// assumed not to create undef/poison before. It's unrelated to the
+	// escape-analysis behavior under test, so ignore it for comparison.
+	s = strings.ReplaceAll(s, "nocreateundeforpoison ", "")
+
+	// LLVM 22 dropped the (redundant) i64 size argument from
+	// llvm.lifetime.start/end. Normalize away that argument so golden files
+	// written against the two-argument form still match.
+	s = lifetimeSizeArgRe.ReplaceAllString(s, "$1")
+
+	return s
+}
+
 // capturesNoneAttrRe matches a co-occurring attribute directly followed by
 // 'captures(none)', which is how LLVM 21+ orders these two attributes when
 // printing IR (the pre-LLVM21 'nocapture' attribute printed the other way
@@ -221,7 +224,9 @@ func compileGoFileForTesting(t *testing.T, filename string) llvm.Module {
 	// Compile AST to IR.
 	program := lprogram.LoadSSA()
 	pkg := lprogram.MainPkg()
-	mod, errs := compiler.CompilePackage(filename, pkg, program.Package(pkg.Pkg), machine, compilerConfig, false)
+	ssaPkg := program.Package(pkg.Pkg)
+	ssaPkg.Build()
+	mod, errs := compiler.CompilePackage(filename, pkg, ssaPkg, machine, compilerConfig, false)
 	if errs != nil {
 		for _, err := range errs {
 			t.Error(err)