compiler: add support for Go 1.23 range-over-func

Author: aykevl

compiler/compiler.go

@@ -1963,7 +1963,7 @@ func (b *builder) getValue(expr ssa.Value, pos token.Pos) llvm.Value {
 			return value
 		} else {
 			// indicates a compiler bug
-			panic("local has not been parsed: " + expr.String())
+			panic("SSA value not previously found in function: " + expr.String())
 		}
 	}
 }

compiler/symbol.go

@@ -218,7 +218,7 @@ func (c *compilerContext) getFunction(fn *ssa.Function) (llvm.Type, llvm.Value)
 	// should be created right away.
 	// The exception is the package initializer, which does appear in the
 	// *ssa.Package members and so shouldn't be created here.
-	if fn.Synthetic != "" && fn.Synthetic != "package initializer" && fn.Synthetic != "generic function" {
+	if fn.Synthetic != "" && fn.Synthetic != "package initializer" && fn.Synthetic != "generic function" && fn.Synthetic != "range-over-func yield" {
 		irbuilder := c.ctx.NewBuilder()
 		b := newBuilder(c, irbuilder, fn)
 		b.createFunction()

main_test.go

@@ -97,6 +97,9 @@ func TestBuild(t *testing.T) {
 	if minor >= 22 {
 		tests = append(tests, "go1.22/")
 	}
+	if minor >= 23 {
+		tests = append(tests, "go1.23/")
+	}
 
 	if *testTarget != "" {
 		// This makes it possible to run one specific test (instead of all),

testdata/go1.23/go.mod

@@ -0,0 +1,3 @@
+module github.com/tinygo-org/tinygo/testdata/go1.23
+
+go 1.23

testdata/go1.23/main.go

@@ -0,0 +1,18 @@
+package main
+
+func main() {
+	testFuncRange(counter)
+}
+
+func testFuncRange(f func(yield func(int) bool)) {
+	for i := range f {
+		println(i)
+	}
+	println("go1.23 has lift-off!")
+}
+
+func counter(yield func(int) bool) {
+	for i := 10; i >= 1; i-- {
+		yield(i)
+	}
+}

testdata/go1.23/out.txt

@@ -0,0 +1,11 @@
+10
+9
+8
+7
+6
+5
+4
+3
+2
+1
+go1.23 has lift-off!