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e9efb3252f
Shuffles that only move an element into position 0 of the vector are common in the output of the loop vectorizer and often generate suboptimal code when SSSE3 is not available. Lower them to vector shifts if possible. We still prefer palignr over psrldq because it has higher throughput on sandybridge. llvm-svn: 182102
55 lines
1.9 KiB
LLVM
55 lines
1.9 KiB
LLVM
; RUN: llc < %s -mtriple=x86_64-apple-darwin -mcpu=corei7-avx -mattr=+avx | FileCheck %s
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; CHECK: vpermilps
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define <8 x float> @funcA(<8 x float> %a) nounwind uwtable readnone ssp {
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entry:
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%shuffle = shufflevector <8 x float> %a, <8 x float> undef, <8 x i32> <i32 1, i32 2, i32 3, i32 1, i32 5, i32 6, i32 7, i32 5>
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ret <8 x float> %shuffle
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}
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; CHECK: vpermilpd
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define <4 x double> @funcB(<4 x double> %a) nounwind uwtable readnone ssp {
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entry:
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%shuffle = shufflevector <4 x double> %a, <4 x double> undef, <4 x i32> <i32 1, i32 0, i32 3, i32 3>
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ret <4 x double> %shuffle
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}
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; CHECK: vpermilps
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define <8 x i32> @funcC(<8 x i32> %a) nounwind uwtable readnone ssp {
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entry:
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%shuffle = shufflevector <8 x i32> %a, <8 x i32> undef, <8 x i32> <i32 1, i32 2, i32 3, i32 1, i32 5, i32 6, i32 7, i32 5>
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ret <8 x i32> %shuffle
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}
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; CHECK: vpermilpd
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define <4 x i64> @funcD(<4 x i64> %a) nounwind uwtable readnone ssp {
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entry:
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%shuffle = shufflevector <4 x i64> %a, <4 x i64> undef, <4 x i32> <i32 1, i32 0, i32 3, i32 3>
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ret <4 x i64> %shuffle
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}
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; CHECK: vpermilpd
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define <4 x i64> @funcQ(<4 x i64>* %a) nounwind uwtable readnone ssp {
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entry:
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%a2 = load <4 x i64>* %a
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%shuffle = shufflevector <4 x i64> %a2, <4 x i64> undef, <4 x i32> <i32 1, i32 0, i32 3, i32 3>
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ret <4 x i64> %shuffle
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}
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; vpermil should match masks like this: <u,3,1,2,4,u,5,6>. Check that the
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; target specific mask was correctly generated.
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; CHECK: vpermilps $-100
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define <8 x float> @funcE(<8 x float> %a) nounwind uwtable readnone ssp {
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entry:
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%shuffle = shufflevector <8 x float> %a, <8 x float> undef, <8 x i32> <i32 8, i32 3, i32 1, i32 2, i32 4, i32 8, i32 5, i32 6>
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ret <8 x float> %shuffle
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}
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; CHECK: palignr $8
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; CHECK: palignr $8
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define <8 x float> @funcF(<8 x float> %a) nounwind uwtable readnone ssp {
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entry:
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%shuffle = shufflevector <8 x float> %a, <8 x float> zeroinitializer, <8 x i32> <i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9>
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ret <8 x float> %shuffle
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}
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