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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
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// Copyright 2017 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 19137: folding address into load/store causes
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// odd offset on ARM64.
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package p
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type T struct {
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p *int
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a [2]byte
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b [6]byte // not 4-byte aligned
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}
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func f(b [6]byte) T {
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var x [1000]int // a large stack frame
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_ = x
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return T{b: b}
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}
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// Arg symbol's base address may be not at an aligned offset to
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// SP. Folding arg's address into load/store may cause odd offset.
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func move(a, b [20]byte) [20]byte {
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var x [1000]int // a large stack frame
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_ = x
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return b // b is not 8-byte aligned to SP
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}
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func zero() ([20]byte, [20]byte) {
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var x [1000]int // a large stack frame
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_ = x
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return [20]byte{}, [20]byte{} // the second return value is not 8-byte aligned to SP
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}
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// Issue 21992: unaligned offset between 256 and 504 and handled
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// incorrectly.
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type T2 struct {
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a [257]byte
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// fields below are not 8-, 4-, 2-byte aligned
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b [8]byte
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c [4]byte
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d [2]byte
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}
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func f2(x *T2) {
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x.b = [8]byte{}
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x.c = [4]byte{}
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x.d = [2]byte{}
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}
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