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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
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// Copyright 2018 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Issue 26438: arm64 backend may use 64-bit TST for
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// "if uint32(a)&uint32(b) == 0", which should be
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// 32-bit TSTW
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package main
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//go:noinline
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func tstw(a, b uint64) uint64 {
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if uint32(a)&uint32(b) == 0 {
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return 100
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} else {
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return 200
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}
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}
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func main() {
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if tstw(0xff00000000, 0xaa00000000) == 200 {
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panic("impossible")
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}
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}
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