// This saves 6+ seconds of bootstrap.
	if archCaps, ok := isUnneededSSARewriteFile(srcFile, gohostarch); ok {
		return fmt.Sprintf(`%spackage ssa

func rewriteValue%s(v *Value) bool { panic("unused during bootstrap") }
func rewriteBlock%s(b *Block) bool { panic("unused during bootstrap") }
`, generatedHeader, archCaps, archCaps)
	}

	return bootstrapFixImports(srcFile)
}

var (