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master
test/fixedbugs/issue36723.go
26 строк
630 B
Cherry Zhang
cmd/compile: on PPC64, fold offset into some loads/stores only when offset is 4-aligned
27 янв 2020, 19:13
27 янв 2020, 19:13
6fbdfe4
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// compile -d=ssa/check/on // Copyright 2020 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 36723: fail to compile on PPC64 when SSA check is on. package p import "unsafe" type T struct { a, b, c, d uint8 x [10]int32 } func F(p *T, i uintptr) int32 { // load p.x[i] using unsafe, derived from runtime.pcdatastart _ = *p return *(*int32)(add(unsafe.Pointer(&p.d), unsafe.Sizeof(p.d)+i*unsafe.Sizeof(p.x[0]))) } func add(p unsafe.Pointer, x uintptr) unsafe.Pointer { return unsafe.Pointer(uintptr(p) + x) }