62 lines
3.4 KiB
LLVM
62 lines
3.4 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -passes=slp-vectorizer -S -mtriple=aarch64-unknown-unknown | FileCheck %s
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; This test is reduced from the TSVC evaluation of vectorizers:
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; https://github.com/llvm/llvm-test-suite/commits/main/MultiSource/Benchmarks/TSVC/LoopRerolling-flt/tsc.c
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; FIXME
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; This test is currently getting vectorized with VF=2. We should be able
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; to vectorize it with VF=4. Specifically, we should be able to have 1 load of
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; <4 x float> instead of 2 loads of <2 x float>, and there should be no need
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; for shufflevectors.
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; The current issue comes from the Left-Hand-Side fmul operands.
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; These operands are coming from 4 loads which are not
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; contiguous. The score estimation needs to be corrected, so that these 4 loads
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; are not selected for vectorization. Instead we should vectorize with
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; contiguous loads, from %a plus offsets 0 to 3, or offsets 1 to 4.
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define void @s116_modified(float* %a) {
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; CHECK-LABEL: @s116_modified(
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; CHECK-NEXT: [[GEP0:%.*]] = getelementptr inbounds float, float* [[A:%.*]], i64 0
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; CHECK-NEXT: [[GEP1:%.*]] = getelementptr inbounds float, float* [[A]], i64 1
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; CHECK-NEXT: [[GEP3:%.*]] = getelementptr inbounds float, float* [[A]], i64 3
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; CHECK-NEXT: [[LD0:%.*]] = load float, float* [[GEP0]], align 4
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; CHECK-NEXT: [[TMP1:%.*]] = bitcast float* [[GEP1]] to <2 x float>*
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; CHECK-NEXT: [[TMP2:%.*]] = load <2 x float>, <2 x float>* [[TMP1]], align 4
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; CHECK-NEXT: [[TMP3:%.*]] = bitcast float* [[GEP3]] to <2 x float>*
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; CHECK-NEXT: [[TMP4:%.*]] = load <2 x float>, <2 x float>* [[TMP3]], align 4
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; CHECK-NEXT: [[TMP5:%.*]] = insertelement <4 x float> poison, float [[LD0]], i32 0
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; CHECK-NEXT: [[TMP6:%.*]] = shufflevector <2 x float> [[TMP2]], <2 x float> poison, <4 x i32> <i32 0, i32 1, i32 1, i32 undef>
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; CHECK-NEXT: [[TMP7:%.*]] = shufflevector <4 x float> [[TMP5]], <4 x float> [[TMP6]], <4 x i32> <i32 0, i32 5, i32 undef, i32 undef>
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; CHECK-NEXT: [[TMP8:%.*]] = shufflevector <2 x float> [[TMP4]], <2 x float> poison, <4 x i32> <i32 0, i32 1, i32 undef, i32 undef>
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; CHECK-NEXT: [[TMP9:%.*]] = shufflevector <4 x float> [[TMP7]], <4 x float> [[TMP8]], <4 x i32> <i32 0, i32 1, i32 4, i32 5>
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; CHECK-NEXT: [[TMP10:%.*]] = shufflevector <2 x float> [[TMP2]], <2 x float> [[TMP4]], <4 x i32> <i32 0, i32 undef, i32 1, i32 2>
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; CHECK-NEXT: [[SHUFFLE:%.*]] = shufflevector <4 x float> [[TMP10]], <4 x float> poison, <4 x i32> <i32 0, i32 0, i32 2, i32 3>
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; CHECK-NEXT: [[TMP11:%.*]] = fmul fast <4 x float> [[TMP9]], [[SHUFFLE]]
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; CHECK-NEXT: [[TMP12:%.*]] = bitcast float* [[GEP0]] to <4 x float>*
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; CHECK-NEXT: store <4 x float> [[TMP11]], <4 x float>* [[TMP12]], align 4
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; CHECK-NEXT: ret void
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;
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%gep0 = getelementptr inbounds float, float* %a, i64 0
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%gep1 = getelementptr inbounds float, float* %a, i64 1
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%gep2 = getelementptr inbounds float, float* %a, i64 2
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%gep3 = getelementptr inbounds float, float* %a, i64 3
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%gep4 = getelementptr inbounds float, float* %a, i64 4
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%ld0 = load float, float* %gep0
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%ld1 = load float, float* %gep1
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%ld2 = load float, float* %gep2
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%ld3 = load float, float* %gep3
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%ld4 = load float, float* %gep4
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%mul0 = fmul fast float %ld0, %ld1
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%mul1 = fmul fast float %ld2, %ld1
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%mul2 = fmul fast float %ld3, %ld2
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%mul3 = fmul fast float %ld4, %ld3
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store float %mul0, float* %gep0
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store float %mul1, float* %gep1
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store float %mul2, float* %gep2
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store float %mul3, float* %gep3
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ret void
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}
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