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master
test/fixedbugs/issue21048.go
72 строки
1 KB
Michael Munday
cmd/compile: fix unaligned loads/stores to global variables on s390x
19 июл 2017, 17:22
19 июл 2017, 17:22
93b7eb9
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// run // Copyright 2017 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 21048: s390x merged address generation into stores // to unaligned global variables. This resulted in an illegal // instruction. package main type T struct { _ [1]byte a [2]byte // offset: 1 _ [3]byte b [2]uint16 // offset: 6 _ [2]byte c [2]uint32 // offset: 12 _ [2]byte d [2]int16 // offset: 22 _ [2]byte e [2]int32 // offset: 28 } var Source, Sink T func newT() T { return T{ a: [2]byte{1, 2}, b: [2]uint16{1, 2}, c: [2]uint32{1, 2}, d: [2]int16{1, 2}, e: [2]int32{1, 2}, } } //go:noinline func moves() { Sink.a = Source.a Sink.b = Source.b Sink.c = Source.c Sink.d = Source.d Sink.e = Source.e } //go:noinline func loads() *T { t := newT() t.a = Source.a t.b = Source.b t.c = Source.c t.d = Source.d t.e = Source.e return &t } //go:noinline func stores() { t := newT() Sink.a = t.a Sink.b = t.b Sink.c = t.c Sink.d = t.d Sink.e = t.e } func main() { moves() loads() stores() }