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https://github.com/RPCS3/llvm.git
synced 2026-07-25 20:55:54 -04:00
Geoff Berry
7946cf61b7
Summary: Avoid using XZR/WZR directly as operands to split stores of zero vectors. Doing so can lead to the XZR/WZR being used by an instruction that doesn't allow it (e.g. add). Fixes bug 34674. Reviewers: t.p.northover, efriedma, MatzeB Subscribers: aemerson, rengolin, javed.absar, mcrosier, eraman, llvm-commits, kristof.beyls Differential Revision: https://reviews.llvm.org/D38146 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@313916 91177308-0d34-0410-b5e6-96231b3b80d8
28 lines
841 B
LLVM
28 lines
841 B
LLVM
; RUN: llc < %s -mtriple=arm64-eabi | FileCheck %s
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define void @t1(i8* nocapture %c) nounwind optsize {
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entry:
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; CHECK-LABEL: t1:
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; CHECK: str wzr, [x0, #8]
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; CHECK: str xzr, [x0]
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call void @llvm.memset.p0i8.i64(i8* %c, i8 0, i64 12, i32 8, i1 false)
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ret void
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}
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define void @t2() nounwind ssp {
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entry:
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; CHECK-LABEL: t2:
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; CHECK: stp xzr, xzr, [sp, #16]
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; CHECK: strh wzr, [sp, #32]
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; CHECK: str xzr, [sp, #8]
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%buf = alloca [26 x i8], align 1
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%0 = getelementptr inbounds [26 x i8], [26 x i8]* %buf, i32 0, i32 0
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call void @llvm.memset.p0i8.i32(i8* %0, i8 0, i32 26, i32 1, i1 false)
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call void @something(i8* %0) nounwind
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ret void
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}
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declare void @something(i8*) nounwind
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declare void @llvm.memset.p0i8.i32(i8* nocapture, i8, i32, i32, i1) nounwind
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declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i32, i1) nounwind
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