28ac873bcb
The compiler should not ignore UndefValue when gathering the scalars, otherwise the resulting code may be less defined than the original one. Also, grouped scalars to insert them at first to reduce the analysis in further passes. Differential Revision: https://reviews.llvm.org/D105275
38 lines
1.7 KiB
LLVM
38 lines
1.7 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -slp-vectorizer -S | FileCheck %s
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target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"
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target triple = "aarch64-unknown-linux-gnu"
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define <2 x float> @insertelement-fixed-vector() {
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; CHECK-LABEL: @insertelement-fixed-vector(
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; CHECK-NEXT: [[TMP1:%.*]] = call fast <2 x float> @llvm.fabs.v2f32(<2 x float> undef)
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; CHECK-NEXT: ret <2 x float> [[TMP1]]
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;
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%f0 = tail call fast float @llvm.fabs.f32(float undef)
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%f1 = tail call fast float @llvm.fabs.f32(float undef)
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%i0 = insertelement <2 x float> undef, float %f0, i32 0
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%i1 = insertelement <2 x float> %i0, float %f1, i32 1
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ret <2 x float> %i1
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}
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; TODO: llvm.fabs could be optimized in vector form. It's legal to extract
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; elements from fixed-length vector and insert into scalable vector.
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define <vscale x 2 x float> @insertelement-scalable-vector() {
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; CHECK-LABEL: @insertelement-scalable-vector(
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; CHECK-NEXT: [[F0:%.*]] = tail call fast float @llvm.fabs.f32(float undef)
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; CHECK-NEXT: [[F1:%.*]] = tail call fast float @llvm.fabs.f32(float undef)
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; CHECK-NEXT: [[I0:%.*]] = insertelement <vscale x 2 x float> undef, float [[F0]], i32 0
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; CHECK-NEXT: [[I1:%.*]] = insertelement <vscale x 2 x float> [[I0]], float [[F1]], i32 1
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; CHECK-NEXT: ret <vscale x 2 x float> [[I1]]
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;
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%f0 = tail call fast float @llvm.fabs.f32(float undef)
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%f1 = tail call fast float @llvm.fabs.f32(float undef)
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%i0 = insertelement <vscale x 2 x float> undef, float %f0, i32 0
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%i1 = insertelement <vscale x 2 x float> %i0, float %f1, i32 1
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ret <vscale x 2 x float> %i1
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}
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; Function Attrs: nounwind readnone speculatable willreturn
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declare float @llvm.fabs.f32(float)
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