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go/test/fixedbugs/issue5515.go
Ian Lance Taylor ae5e791ed2 cmd/gc: save local var list before inlining
This avoids problems with inlining in genwrappers, which
occurs after functions have been compiled.  Compiling a
function may cause some unused local vars to be removed from
the list.  Since a local var may be unused due to
optimization, it is possible that a removed local var winds up
beingused in the inlined version, in which case hilarity
ensues.

Fixes #5515.

R=golang-dev, khr, dave
CC=golang-dev
https://golang.org/cl/10210043
2013-06-11 20:23:21 -07:00

35 lines
597 B
Go

// run
// Copyright 2013 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.
// issue 5515: miscompilation doing inlining in generated method wrapper
package main
type T uint32
func main() {
b := make([]T, 8)
b[0] = 0xdeadbeef
rs := Slice(b)
sort(rs)
}
type Slice []T
func (s Slice) Swap(i, j int) {
tmp := s[i]
s[i] = s[j]
s[j] = tmp
}
type Interface interface {
Swap(i, j int)
}
func sort(data Interface) {
data.Swap(0, 4)
}