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Source file test/fixedbugs/bug369.go

Documentation: test/fixedbugs

  // +build !nacl,!windows
  // run
  
  // Copyright 2011 The Go Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style
  // license that can be found in the LICENSE file.
  
  // Test that compiling with optimization turned on produces faster code.
  
  package main
  
  import (
  	"fmt"
  	"os"
  	"os/exec"
  	"path/filepath"
  )
  
  func main() {
  	err := os.Chdir(filepath.Join(".", "fixedbugs", "bug369.dir"))
  	check(err)
  
  	run("go", "tool", "compile", "-N", "-o", "slow.o", "pkg.go")
  	run("go", "tool", "compile", "-o", "fast.o", "pkg.go")
  	run("go", "tool", "compile", "-o", "main.o", "main.go")
  	run("go", "tool", "link", "-o", "a.exe", "main.o")
  	run("." + string(filepath.Separator) + "a.exe")
  
  	os.Remove("slow.o")
  	os.Remove("fast.o")
  	os.Remove("main.o")
  	os.Remove("a.exe")
  }
  
  func run(name string, args ...string) {
  	cmd := exec.Command(name, args...)
  	out, err := cmd.CombinedOutput()
  	if err != nil {
  		fmt.Println(string(out))
  		fmt.Println(err)
  		os.Exit(1)
  	}
  }
  
  func check(err error) {
  	if err != nil {
  		fmt.Println(err)
  		os.Exit(1)
  	}
  }
  

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