beccecaacd
If the reduction operation is a select-based logical op, the condition should be replaced by the poison, better to replace by the non-poisoning constant to prevent poison propagation in the vector code. Fixes https://github.com/llvm/llvm-project/issues/98838
27 lines
1.2 KiB
LLVM
27 lines
1.2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
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; RUN: opt -S --passes=slp-vectorizer -mtriple=x86_64-unknown-linux < %s | FileCheck %s
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define i1 @src(i1 %cmp4.118.i) {
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; CHECK-LABEL: define i1 @src(
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; CHECK-SAME: i1 [[CMP4_118_I:%.*]]) {
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; CHECK-NEXT: [[CMP4_118_I_NOT:%.*]] = xor i1 [[CMP4_118_I]], true
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; CHECK-NEXT: [[TMP1:%.*]] = freeze <4 x i1> poison
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; CHECK-NEXT: [[TMP2:%.*]] = call i1 @llvm.vector.reduce.or.v4i1(<4 x i1> [[TMP1]])
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; CHECK-NEXT: [[OP_RDX:%.*]] = select i1 [[CMP4_118_I_NOT]], i1 true, i1 [[TMP2]]
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; CHECK-NEXT: [[TMP3:%.*]] = freeze i1 [[OP_RDX]]
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; CHECK-NEXT: [[OP_RDX1:%.*]] = select i1 [[TMP3]], i1 true, i1 poison
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; CHECK-NEXT: ret i1 [[OP_RDX1]]
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;
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%cmp4.118.i.not = xor i1 %cmp4.118.i, true
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%brmerge = select i1 %cmp4.118.i.not, i1 true, i1 poison
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%.not = xor i1 poison, true
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%brmerge2 = select i1 %brmerge, i1 true, i1 %.not
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%.not3 = xor i1 poison, true
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%brmerge4 = select i1 %brmerge2, i1 true, i1 %.not3
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%.not5 = xor i1 poison, true
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%brmerge6 = select i1 %brmerge4, i1 true, i1 %.not5
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%.not7 = xor i1 poison, true
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%brmerge8 = select i1 %brmerge6, i1 true, i1 %.not7
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ret i1 %brmerge8
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}
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