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2b7d0b4c0d
We were failing ^uint16(0xffff) == 0, as we computed 0xffff0000 instead.
I could only trigger a failure for the above case, the other two tests
^uint16(0xfffe) == 1 and -uint16(0xffff) == 1 didn't seem to fail
previously. Somehow they get MOVHUs inserted for other reasons (used
by CMP instead of TST?). I fixed OMINUS anyway, better safe than
sorry.
Fixes #9604
Change-Id: I4c2d5bdc667742873ac029fdbe3db0cf12893c27
Reviewed-on: https://go-review.googlesource.com/2940
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Minux Ma <minux@golang.org>
(cherry picked from commit daa64ddfe6)
Reviewed-on: https://go-review.googlesource.com/5002
30 lines
631 B
Go
30 lines
631 B
Go
// run
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// Copyright 2015 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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package main
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var x uint16 = 0xffff
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var y uint16 = 0xfffe
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var a uint16 = 0x7000
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var b uint16 = 0x9000
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func main() {
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// Make sure we truncate to smaller-width types after evaluating expressions.
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// This is a problem for arm where there is no 16-bit comparison op.
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if ^x != 0 {
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panic("^uint16(0xffff) != 0")
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}
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if ^y != 1 {
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panic("^uint16(0xfffe) != 1")
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}
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if -x != 1 {
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panic("-uint16(0xffff) != 1")
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}
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if a+b != 0 {
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panic("0x7000+0x9000 != 0")
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}
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}
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