ac254fc055
Currently tryToGatherExtractElements function analyzes the whole vector, regrdless number of actual registers, used in this vector. It may prevent some optimizations, because per-register analysis may allow to simplify the final code by reusing more already emitted vectors and better shuffles. Differential Revision: https://reviews.llvm.org/D148855
32 lines
1.3 KiB
LLVM
32 lines
1.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -passes=slp-vectorizer -S -o - -mtriple=x86_64-unknown-linux -mcpu=bdver2 -pass-remarks-output=%t | FileCheck %s
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; RUN: FileCheck --input-file=%t --check-prefix=YAML %s
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; YAML: --- !Missed
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; YAML-NEXT: Pass: slp-vectorizer
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; YAML-NEXT: Name: NotBeneficial
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; YAML-NEXT: Function: g
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; YAML-NEXT: Args:
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; YAML-NEXT: - String: 'List vectorization was possible but not beneficial with cost '
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; YAML-NEXT: - Cost: '0'
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; YAML-NEXT: - String: ' >= '
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; YAML-NEXT: - Treshold: '0'
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define <2 x i32> @g(<2 x i32> %x, i32 %a, i32 %b) {
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; CHECK-LABEL: @g(
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; CHECK-NEXT: [[X1:%.*]] = extractelement <2 x i32> [[X:%.*]], i32 1
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; CHECK-NEXT: [[X1X1:%.*]] = mul i32 [[X1]], [[X1]]
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; CHECK-NEXT: [[AB:%.*]] = mul i32 [[A:%.*]], [[B:%.*]]
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; CHECK-NEXT: [[INS1:%.*]] = insertelement <2 x i32> poison, i32 [[X1X1]], i32 0
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; CHECK-NEXT: [[INS2:%.*]] = insertelement <2 x i32> [[INS1]], i32 [[AB]], i32 1
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; CHECK-NEXT: ret <2 x i32> [[INS2]]
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;
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%x1 = extractelement <2 x i32> %x, i32 1
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%x1x1 = mul i32 %x1, %x1
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%ab = mul i32 %a, %b
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%ins1 = insertelement <2 x i32> poison, i32 %x1x1, i32 0
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%ins2 = insertelement <2 x i32> %ins1, i32 %ab, i32 1
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ret <2 x i32> %ins2
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}
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