golang issue4518 代码
文件路径：/test/fixedbugs/issue4518.go
/ run
/ Copyright 2012 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 4518. In some circumstances "return F(...)"
/ where F has multiple returns is miscompiled by 6g due to
/ bold assumptions in componentgen.
package main
/go:noinline
func F(e interface{}) (int, int) {
return 3, 7
}
/go:noinline
func G() (int, int) {
return 3, 7
}
func bogus1(d interface{}) (int, int) {
switch {
default:
return F(d)
}
return 0, 0
}
func bogus2() (int, int) {
switch {
default:
return F(3)
}
return 0, 0
}
func bogus3(d interface{}) (int, int) {
switch {
default:
return G()
}
return 0, 0
}
func bogus4() (int, int) {
switch {
default:
return G()
}
return 0, 0
}
func check(a, b int) {
if a != 3 || b != 7 {
println(a, b)
panic("a != 3 || b != 7")
}
}
func main() {
check(bogus1(42))
check(bogus2())
}