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Code Issues Packages Projects Releases 6 Wiki Activity

compiler: Merge the runtime into the Go code, for better code size

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This commit is contained in:
Ayke van Laethem
2018-04-26 18:06:54 +02:00
parent 775445cceb
commit 2d19bb11ba
4 changed files with 47 additions and 25 deletions
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tgo.go
+19 -4
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@@ -1033,6 +1033,10 @@ func (c *Compiler) Verify() error {
return llvm.VerifyModule(c.mod, 0)
}
func (c *Compiler) LinkModule(mod llvm.Module) error {
return llvm.LinkModules(c.mod, mod)
}
func (c *Compiler) Optimize(optLevel, sizeLevel int) {
builder := llvm.NewPassManagerBuilder()
defer builder.Dispose()
@@ -1079,7 +1083,7 @@ func (c *Compiler) EmitObject(path string) error {
}
// Helper function for Compiler object.
func Compile(pkgName, outpath, target string, printIR bool) error {
func Compile(pkgName, runtimePath, outpath, target string, printIR bool) error {
var buildTags []string
// TODO: put this somewhere else
if target == "pca10040" {
@@ -1100,6 +1104,16 @@ func Compile(pkgName, outpath, target string, printIR bool) error {
return parseErr
}
// Add C runtime.
runtime, err := llvm.ParseBitcodeFile(runtimePath)
if err != nil {
return err
}
err = c.LinkModule(runtime)
if err != nil {
return err
}
if err := c.Verify(); err != nil {
return err
}
@@ -1119,20 +1133,21 @@ func Compile(pkgName, outpath, target string, printIR bool) error {
func main() {
outpath := flag.String("o", "", "output filename")
target := flag.String("target", llvm.DefaultTargetTriple(), "LLVM target")
printIR := flag.Bool("printir", false, "print LLVM IR after optimizing")
runtime := flag.String("runtime", "", "runtime LLVM bitcode files (from C sources)")
target := flag.String("target", llvm.DefaultTargetTriple(), "LLVM target")
flag.Parse()
if *outpath == "" || flag.NArg() != 1 {
fmt.Fprintf(os.Stderr, "usage: %s [-printir] [-target=<target>] -o <output> <input>", os.Args[0])
fmt.Fprintf(os.Stderr, "usage: %s [-printir] -runtime=<runtime.bc> [-target=<target>] -o <output> <input>", os.Args[0])
flag.PrintDefaults()
return
}
os.Setenv("CC", "clang -target=" + *target)
err := Compile(flag.Args()[0], *outpath, *target, *printIR)
err := Compile(flag.Args()[0], *runtime, *outpath, *target, *printIR)
if err != nil {
fmt.Fprintln(os.Stderr, "error:", err)
os.Exit(1)