test/fixedbugs: add test for divide by zero being optimized away

This only tests amd64 because it's currently broken on non-SSA
backends.

Fixes #8613

Change-Id: I6bc501c81c395e533bb9c7335789750e0c6b7a8f
Reviewed-on: https://go-review.googlesource.com/21325
Reviewed-by: Keith Randall <khr@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This commit is contained in:
Brad Fitzpatrick 2016-03-31 13:51:17 +11:00
parent a6557a05a0
commit 758447cdc9

View file

@ -0,0 +1,39 @@
// +build amd64
// run
// Copyright 2016 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.
package main
var out int
var zero int
func main() {
wantPanic("test1", func() {
out = 1 / zero
})
wantPanic("test2", func() {
_ = 1 / zero
})
wantPanic("test3", func() {
v := 0
_ = 1 / v
})
wantPanic("test4", func() { divby(0) })
}
func wantPanic(test string, fn func()) {
defer func() {
if e := recover(); e == nil {
panic(test + ": expected panic")
}
}()
fn()
}
//go:noinline
func divby(v int) {
_ = 1 / v
}