mirror of
https://github.com/golang/go
synced 2024-07-21 01:55:06 +00:00
a92a77c56f
C_PPAUTO was matching offsets that is a multiple 8. But this condition is dropped in CL 55610, causing unaligned offset between 256 and 504 mistakenly matched to some classes, e.g. C_UAUTO8K. This CL restores this condition, also fixes an error that C_PPAUTO shouldn't match C_PSAUTO, because the latter is not guaranteed to be multiple of 8. C_PPAUTO_8 is unnecessary, removed. Fixes #21992. Change-Id: I75d5a0e5f5dc3dae335721fbec1bbcd4a3b862f2 Reviewed-on: https://go-review.googlesource.com/65730 Reviewed-by: David Chase <drchase@google.com>
52 lines
1.1 KiB
Go
52 lines
1.1 KiB
Go
// compile
|
|
|
|
// 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 19137: folding address into load/store causes
|
|
// odd offset on ARM64.
|
|
|
|
package p
|
|
|
|
type T struct {
|
|
p *int
|
|
a [2]byte
|
|
b [6]byte // not 4-byte aligned
|
|
}
|
|
|
|
func f(b [6]byte) T {
|
|
var x [1000]int // a large stack frame
|
|
_ = x
|
|
return T{b: b}
|
|
}
|
|
|
|
// Arg symbol's base address may be not at an aligned offset to
|
|
// SP. Folding arg's address into load/store may cause odd offset.
|
|
func move(a, b [20]byte) [20]byte {
|
|
var x [1000]int // a large stack frame
|
|
_ = x
|
|
return b // b is not 8-byte aligned to SP
|
|
}
|
|
func zero() ([20]byte, [20]byte) {
|
|
var x [1000]int // a large stack frame
|
|
_ = x
|
|
return [20]byte{}, [20]byte{} // the second return value is not 8-byte aligned to SP
|
|
}
|
|
|
|
// Issue 21992: unaligned offset between 256 and 504 and handled
|
|
// incorrectly.
|
|
type T2 struct {
|
|
a [257]byte
|
|
// fields below are not 8-, 4-, 2-byte aligned
|
|
b [8]byte
|
|
c [4]byte
|
|
d [2]byte
|
|
}
|
|
|
|
func f2(x *T2) {
|
|
x.b = [8]byte{}
|
|
x.c = [4]byte{}
|
|
x.d = [2]byte{}
|
|
}
|