1 // run 2 3 // Copyright 2017 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 ) 12 13 type PI struct { 14 Enabled bool 15 } 16 17 type SI struct { 18 M map[string]*PI 19 } 20 21 //go:noinline 22 func (s *SI) test(name string) (*int, error) { 23 n := new(int) 24 *n = 99 25 if err := addUpdate(n, s.M[name].Enabled, "enabled"); err != nil { // this was miscompiled 26 return nil, fmt.Errorf(" error adding update for enable flag %t : %s", 27 s.M[name].Enabled, err) 28 } 29 return n, nil 30 } 31 32 //go:noinline 33 func addUpdate(n *int, in interface{}, s ...string) error { 34 if *n != 99 { 35 println("FAIL, *n should be 99, not", *n) 36 } 37 return nil 38 } 39 40 func main1() { 41 s := &SI{make(map[string]*PI)} 42 s.M["dog"] = &PI{} 43 s.test("dog") 44 } 45 46 //go:noinline 47 func g(b *byte, i interface{}) error { 48 if *b != 17 { 49 println("FAIL, *b should be 17, not", *b) 50 } 51 return nil 52 } 53 54 //go:noinline 55 func f(x *byte, m map[string]*bool) { 56 if err := g(x, *m["hello"]); err != nil { // this was miscompiled 57 return 58 } 59 } 60 61 func main2() { 62 m := make(map[string]*bool) 63 x := false 64 m["hello"] = &x 65 b := byte(17) 66 f(&b, m) 67 } 68 69 func main() { 70 main2() 71 main1() 72 } 73
