mirror of
https://github.com/golang/go
synced 2024-11-15 03:10:22 -07:00
f6ce1e2aa5
The arm64 backend generates "TST" for "if uint32(a)&uint32(b) == 0", which should be "TSTW". fixes #26438 Change-Id: I7d64c30e3a840b43486bcd10eea2e3e75aaa4857 Reviewed-on: https://go-review.googlesource.com/124637 Run-TryBot: Ben Shi <powerman1st@163.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Cherry Zhang <cherryyz@google.com>
27 lines
507 B
Go
27 lines
507 B
Go
// run
|
|
|
|
// Copyright 2018 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 26438: arm64 backend may use 64-bit TST for
|
|
// "if uint32(a)&uint32(b) == 0", which should be
|
|
// 32-bit TSTW
|
|
|
|
package main
|
|
|
|
//go:noinline
|
|
func tstw(a, b uint64) uint64 {
|
|
if uint32(a)&uint32(b) == 0 {
|
|
return 100
|
|
} else {
|
|
return 200
|
|
}
|
|
}
|
|
|
|
func main() {
|
|
if tstw(0xff00000000, 0xaa00000000) == 200 {
|
|
panic("impossible")
|
|
}
|
|
}
|