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6fbdfe4804
On PPC64, MOVWload, MOVDload, and MOVDstore are assembled to a "DS from" instruction which requiers the offset is a multiple of 4. Only fold offset to such instructions if it is a multiple of 4. Fixes #36723. "GOARCH=ppc64 GOOS=linux go build -gcflags=all=-d=ssa/check/on std cmd" passes now. Change-Id: I67f2a6ac02f0d33d470f68ff54936c289a4c765b Reviewed-on: https://go-review.googlesource.com/c/go/+/216379 Reviewed-by: Carlos Eduardo Seo <cseo@linux.vnet.ibm.com>
27 lines
630 B
Go
27 lines
630 B
Go
// compile -d=ssa/check/on
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// Copyright 2020 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 36723: fail to compile on PPC64 when SSA check is on.
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package p
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import "unsafe"
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type T struct {
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a, b, c, d uint8
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x [10]int32
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}
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func F(p *T, i uintptr) int32 {
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// load p.x[i] using unsafe, derived from runtime.pcdatastart
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_ = *p
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return *(*int32)(add(unsafe.Pointer(&p.d), unsafe.Sizeof(p.d)+i*unsafe.Sizeof(p.x[0])))
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}
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func add(p unsafe.Pointer, x uintptr) unsafe.Pointer {
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return unsafe.Pointer(uintptr(p) + x)
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}
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