4a8e6ed2f7
This patch makes SLP and LV emit operations with initial vectors set to poison constant instead of undef. This is a part of efforts for using poison vector instead of undef to represent "doesn't care" vector. The goal is to make nice shufflevector optimizations valid that is currently incorrect due to the tricky interaction between undef and poison (see https://bugs.llvm.org/show_bug.cgi?id=44185 ). Reviewed By: fhahn Differential Revision: https://reviews.llvm.org/D94061
41 lines
2.4 KiB
LLVM
41 lines
2.4 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -slp-vectorizer -S -mtriple=x86_64-unknown-linux -mattr=+sse4.2 | FileCheck %s
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@a = common local_unnamed_addr global [4 x i32] zeroinitializer, align 4
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@b = common local_unnamed_addr global [4 x i32] zeroinitializer, align 4
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define i32 @fn1() {
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; CHECK-LABEL: @fn1(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[TMP0:%.*]] = load <4 x i32>, <4 x i32>* bitcast ([4 x i32]* @b to <4 x i32>*), align 4
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; CHECK-NEXT: [[SHUFFLE:%.*]] = shufflevector <4 x i32> [[TMP0]], <4 x i32> poison, <4 x i32> <i32 1, i32 2, i32 3, i32 0>
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; CHECK-NEXT: [[TMP1:%.*]] = icmp sgt <4 x i32> [[SHUFFLE]], zeroinitializer
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; CHECK-NEXT: [[TMP2:%.*]] = extractelement <4 x i32> [[SHUFFLE]], i32 0
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; CHECK-NEXT: [[TMP3:%.*]] = insertelement <4 x i32> poison, i32 [[TMP2]], i32 0
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; CHECK-NEXT: [[TMP4:%.*]] = insertelement <4 x i32> [[TMP3]], i32 ptrtoint (i32 ()* @fn1 to i32), i32 1
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; CHECK-NEXT: [[TMP5:%.*]] = insertelement <4 x i32> [[TMP4]], i32 ptrtoint (i32 ()* @fn1 to i32), i32 2
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; CHECK-NEXT: [[TMP6:%.*]] = insertelement <4 x i32> [[TMP5]], i32 8, i32 3
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; CHECK-NEXT: [[TMP7:%.*]] = select <4 x i1> [[TMP1]], <4 x i32> [[TMP6]], <4 x i32> <i32 6, i32 0, i32 0, i32 0>
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; CHECK-NEXT: store <4 x i32> [[TMP7]], <4 x i32>* bitcast ([4 x i32]* @a to <4 x i32>*), align 4
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; CHECK-NEXT: ret i32 0
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;
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entry:
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%0 = load i32, i32* getelementptr ([4 x i32], [4 x i32]* @b, i64 0, i32 0), align 4
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%cmp = icmp sgt i32 %0, 0
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%cond = select i1 %cmp, i32 8, i32 0
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store i32 %cond, i32* getelementptr inbounds ([4 x i32], [4 x i32]* @a, i64 0, i32 3), align 4
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%1 = load i32, i32* getelementptr ([4 x i32], [4 x i32]* @b, i64 0, i32 1), align 4
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%cmp1 = icmp sgt i32 %1, 0
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%. = select i1 %cmp1, i32 %1, i32 6
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store i32 %., i32* getelementptr inbounds ([4 x i32], [4 x i32]* @a, i64 0, i32 0), align 4
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%2 = load i32, i32* getelementptr ([4 x i32], [4 x i32]* @b, i64 0, i32 2), align 4
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%cmp4 = icmp sgt i32 %2, 0
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%3 = select i1 %cmp4, i32 ptrtoint (i32 ()* @fn1 to i32), i32 0
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store i32 %3, i32* getelementptr inbounds ([4 x i32], [4 x i32]* @a, i64 0, i32 1), align 4
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%4 = load i32, i32* getelementptr ([4 x i32], [4 x i32]* @b, i64 0, i32 3), align 4
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%cmp6 = icmp sgt i32 %4, 0
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%5 = select i1 %cmp6, i32 ptrtoint (i32 ()* @fn1 to i32), i32 0
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store i32 %5, i32* getelementptr inbounds ([4 x i32], [4 x i32]* @a, i64 0, i32 2), align 4
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ret i32 0
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}
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