bug369.go

     1  // run
     2  
     3  //go:build !nacl && !js && !wasip1 && gc
     4  
     5  // Copyright 2011 The Go Authors. All rights reserved.
     6  // Use of this source code is governed by a BSD-style
     7  // license that can be found in the LICENSE file.
     8  
     9  // Test that compiling with optimization turned on produces faster code.
    10  
    11  package main
    12  
    13  import (
    14  	"fmt"
    15  	"io/ioutil"
    16  	"os"
    17  	"os/exec"
    18  	"path/filepath"
    19  )
    20  
    21  func main() {
    22  	err := os.Chdir(filepath.Join(".", "fixedbugs", "bug369.dir"))
    23  	check(err)
    24  
    25  	tmpDir, err := ioutil.TempDir("", "bug369")
    26  	check(err)
    27  	defer os.RemoveAll(tmpDir)
    28  
    29  	tmp := func(name string) string {
    30  		return filepath.Join(tmpDir, name)
    31  	}
    32  
    33  	check(os.Mkdir(tmp("test"), 0777))
    34  
    35  	stdlibimportcfg, err := os.ReadFile(os.Getenv("STDLIB_IMPORTCFG"))
    36  	check(err)
    37  	importcfg := string(stdlibimportcfg) + "\npackagefile test/slow=" + tmp("test/slow.o") + "\npackagefile test/fast=" + tmp("test/fast.o")
    38  	os.WriteFile(tmp("importcfg"), []byte(importcfg), 0644)
    39  
    40  	run("go", "tool", "compile", "-importcfg="+tmp("importcfg"), "-p=test/slow", "-N", "-o", tmp("test/slow.o"), "pkg.go")
    41  	run("go", "tool", "compile", "-importcfg="+tmp("importcfg"), "-p=test/fast", "-o", tmp("test/fast.o"), "pkg.go")
    42  	run("go", "tool", "compile", "-importcfg="+tmp("importcfg"), "-p=main", "-D", "test", "-o", tmp("main.o"), "main.go")
    43  	run("go", "tool", "link", "-importcfg="+tmp("importcfg"), "-o", tmp("a.exe"), tmp("main.o"))
    44  	run(tmp("a.exe"))
    45  }
    46  
    47  func run(name string, args ...string) {
    48  	cmd := exec.Command(name, args...)
    49  	out, err := cmd.CombinedOutput()
    50  	if err != nil {
    51  		fmt.Println(string(out))
    52  		fmt.Println(err)
    53  		os.Exit(1)
    54  	}
    55  }
    56  
    57  func check(err error) {
    58  	if err != nil {
    59  		fmt.Println(err)
    60  		os.Exit(1)
    61  	}
    62  }
    63
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