// so the test should not have been rerun.
	tg.grepStderr(`([\\/]compile|gccgo).*t2_test.go`, "did not recompile t2")
	tg.grepStderr(`([\\/]link|gccgo).*t2\.test`, "did not relink t2_test")
	// This check does not currently work with gccgo, as garbage
	// collection of unused variables is not turned on by default.
	if runtime.Compiler != "gccgo" {
		tg.grepStdout(`ok  \tt/t2\t\(cached\)`, "did not cache t/t2")
	}

}

// gccgoToSymbol converts a name to a mangled symbol for gccgo.
func gccgoToSymbol(ppath string) string {
	if gccgoMangler == nil {
		var err error
		cmd := os.Getenv("GCCGO")
		if cmd == "" {
			cmd, err = exec.LookPath("gccgo")
			if err != nil {
				fatalf("unable to locate gccgo: %v", err)
			}
		}
		gccgoMangler, err = pkgpath.ToSymbolFunc(cmd, *objDir)

	}
	switch ctxt.Compiler {
	case "gccgo":
		pkgtargetroot = "pkg/gccgo_" + ctxt.GOOS + "_" + ctxt.GOARCH + suffix
	case "gc":
		pkgtargetroot = "pkg/" + ctxt.GOOS + "_" + ctxt.GOARCH + suffix
	default:
		// Save error for end of function.
		pkgerr = fmt.Errorf("import %q: unknown compiler %q", path, ctxt.Compiler)
	}
	setPkga := func() {
		switch ctxt.Compiler {
		case "gccgo":
			dir, elem := pathpkg.Split(p.ImportPath)

		} else {
			foo *= foo + 2
		}
	}
	return foo
}

// Return a list of functions that we don't want to ever appear in CPU
// profiles. For gccgo, that list includes the sigprof handler itself.
func avoidFunctions() []string {
	if runtime.Compiler == "gccgo" {
		return []string{"runtime.sigprof"}
	}
	return nil
}

func TestCPUProfile(t *testing.T) {

	}

	pkg.inStd = (search.IsStandardImportPath(pkg.path) && search.InDir(pkg.dir, cfg.GOROOTsrc) != "")

	var imports, testImports []string

	if cfg.BuildContext.Compiler == "gccgo" && pkg.inStd {
		// We can't scan standard packages for gccgo.
	} else {
		var err error
		imports, testImports, err = scanDir(modroot, pkg.dir, ld.Tags)
		if err != nil {
			pkg.err = err
			return
		}
	}

// from the original Go source files to the names
// used in the final Go files generated by cgo.
func (p *Package) mangleName(n *Name) {
	// When using gccgo variables have to be
	// exported so that they become global symbols
	// that the C code can refer to.
	prefix := "_C"
	if *gccgo && n.IsVar() {
		prefix = "C"
	}
	n.Mangle = prefix + n.Kind + "_" + n.Go
}

func (f *File) isMangledName(s string) bool {

// internal/platform.BuildModeSupported, which can't be used here
// because cmd/dist can not import internal packages during bootstrap.
func buildModeSupported(compiler, buildmode, goos, goarch string) bool {
	if compiler == "gccgo" {
		return true
	}

	platform := goos + "/" + goarch

	switch buildmode {
	case "archive":
		return true

	case "c-archive":
		switch goos {

// expectFail reports whether the (overall) test recipe is
// expected to fail under the current build+test configuration.
func (t test) expectFail() bool {
	failureSets := []map[string]bool{types2Failures}

	// Note: gccgo supports more 32-bit architectures than this, but
	// hopefully the 32-bit failures are fixed before this matters.
	switch goarch {
	case "386", "arm", "mips", "mipsle":
		failureSets = append(failureSets, types2Failures32Bit)

		// without running in to some other mapping.
		//
		// 2. This makes Go heap addresses more easily
		// recognizable when debugging.
		//
		// 3. Stack scanning in gccgo is still conservative,
		// so it's important that addresses be distinguishable
		// from other data.
		//
		// Starting at 0x00c0 means that the valid memory addresses
		// will begin 0x00c0, 0x00c1, ...

type T = foo.T
var v T = c
func f(x T) T { return foo.F(x) }
`
	f := mustParse(src)
	files := []*syntax.File{f}

	// type-check using all possible importers
	for _, compiler := range []string{"gc", "gccgo", "source"} {
		errcount := 0
		conf := Config{
			Error: func(err error) {
				// we should only see the import error
				if errcount > 0 || !strings.Contains(err.Error(), "could not import") {