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      1 // run
      2 
      3 // Copyright 2013 The Go Authors. All rights reserved.
      4 // Use of this source code is governed by a BSD-style
      5 // license that can be found in the LICENSE file.
      6 
      7 package main
      8 
      9 import (
     10 	"fmt"
     11 	"os"
     12 	"runtime"
     13 	"testing"
     14 )
     15 
     16 type T struct { int }
     17 
     18 var globl *T
     19 
     20 func F() {
     21 	t := &T{}
     22 	globl = t
     23 }
     24 
     25 func G() {
     26 	t := &T{}
     27 	_ = t
     28 }
     29 
     30 func main() {
     31 	nf := testing.AllocsPerRun(100, F)
     32 	ng := testing.AllocsPerRun(100, G)
     33 	if int(nf) > 1 {
     34 		fmt.Printf("AllocsPerRun(100, F) = %v, want 1\n", nf)
     35 		os.Exit(1)
     36 	}
     37 	if int(ng) != 0 && (runtime.Compiler != "gccgo" || int(ng) != 1) {
     38 		fmt.Printf("AllocsPerRun(100, G) = %v, want 0\n", ng)
     39 		os.Exit(1)
     40 	}
     41 }
     42