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b6cb8a0e20
I noticed that we weren't generating broadcasts as much I thought we would with D54271, and this is part of the problem. Widening the shuffle elements means adding bitcasts and hiding the relationship between a splatted scalar and the vector. If we can form a broadcast, do that before going through the rest of the shuffle lowering because broadcasts should be cheap and can often be load-folded. Differential Revision: https://reviews.llvm.org/D54280 llvm-svn: 346498
105 lines
4.4 KiB
LLVM
105 lines
4.4 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mtriple=x86_64-unknown -mattr=+avx2 | FileCheck %s --check-prefixes=AVX2,AVX2-SLOW
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; RUN: llc < %s -mtriple=x86_64-unknown -mattr=+avx2,+fast-variable-shuffle | FileCheck %s --check-prefixes=AVX2,AVX2-FAST
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; PR32449
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define <2 x double> @foo2(<2 x double> %v, <2 x double> *%p) nounwind {
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; AVX2-LABEL: foo2:
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; AVX2: # %bb.0:
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; AVX2-NEXT: vpermilpd {{.*#+}} xmm0 = xmm0[1,1]
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; AVX2-NEXT: vmovapd %xmm0, (%rdi)
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; AVX2-NEXT: retq
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%res = shufflevector <2 x double> %v, <2 x double> undef, <2 x i32> <i32 1, i32 1>
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%res1 = shufflevector<2 x double> %res, <2 x double> undef, <2 x i32> <i32 1, i32 undef>
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store <2 x double> %res, <2 x double>* %p
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ret <2 x double> %res1
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}
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define <4 x double> @foo4(<4 x double> %v, <4 x double> *%p) nounwind {
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; AVX2-LABEL: foo4:
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; AVX2: # %bb.0:
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; AVX2-NEXT: vpermpd {{.*#+}} ymm0 = ymm0[2,2,2,2]
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; AVX2-NEXT: vmovaps %ymm0, (%rdi)
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; AVX2-NEXT: retq
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%res = shufflevector <4 x double> %v, <4 x double> undef, <4 x i32> <i32 2, i32 2, i32 2, i32 2>
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%res1 = shufflevector<4 x double> %res, <4 x double> undef, <4 x i32> <i32 2, i32 0, i32 undef, i32 undef>
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store <4 x double> %res, <4 x double>* %p
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ret <4 x double> %res1
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}
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define <8 x float> @foo8(<8 x float> %v, <8 x float> *%p) nounwind {
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; AVX2-SLOW-LABEL: foo8:
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; AVX2-SLOW: # %bb.0:
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; AVX2-SLOW-NEXT: vmovshdup {{.*#+}} ymm0 = ymm0[1,1,3,3,5,5,7,7]
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; AVX2-SLOW-NEXT: vpermpd {{.*#+}} ymm0 = ymm0[2,2,2,2]
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; AVX2-SLOW-NEXT: vmovaps %ymm0, (%rdi)
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; AVX2-SLOW-NEXT: retq
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;
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; AVX2-FAST-LABEL: foo8:
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; AVX2-FAST: # %bb.0:
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; AVX2-FAST-NEXT: vbroadcastss {{.*#+}} ymm1 = [5,5,5,5,5,5,5,5]
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; AVX2-FAST-NEXT: vpermps %ymm0, %ymm1, %ymm0
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; AVX2-FAST-NEXT: vmovaps %ymm0, (%rdi)
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; AVX2-FAST-NEXT: retq
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%res = shufflevector <8 x float> %v, <8 x float> undef, <8 x i32> <i32 5, i32 5, i32 5, i32 5, i32 5, i32 5, i32 5, i32 5>
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%res1 = shufflevector<8 x float> %res, <8 x float> undef, <8 x i32> <i32 2, i32 0, i32 undef, i32 undef, i32 5, i32 1, i32 3, i32 7>
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store <8 x float> %res, <8 x float>* %p
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ret <8 x float> %res1
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}
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define <4 x i32> @undef_splatmask(<4 x i32> %v) nounwind {
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; AVX2-LABEL: undef_splatmask:
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; AVX2: # %bb.0:
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; AVX2-NEXT: vpermilps {{.*#+}} xmm0 = xmm0[2,2,3,3]
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; AVX2-NEXT: retq
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%res = shufflevector <4 x i32> %v, <4 x i32> undef, <4 x i32> <i32 2, i32 undef, i32 2, i32 undef>
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%res1 = shufflevector <4 x i32> %res, <4 x i32> undef, <4 x i32> <i32 0, i32 2, i32 undef, i32 undef>
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ret <4 x i32> %res1
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}
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define <4 x i32> @undef_splatmask2(<4 x i32> %v) nounwind {
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; AVX2-LABEL: undef_splatmask2:
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; AVX2: # %bb.0:
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; AVX2-NEXT: vpermilps {{.*#+}} xmm0 = xmm0[2,2,3,3]
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; AVX2-NEXT: retq
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%res = shufflevector <4 x i32> %v, <4 x i32> undef, <4 x i32> <i32 2, i32 1, i32 2, i32 undef>
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%res1 = shufflevector <4 x i32> %res, <4 x i32> undef, <4 x i32> <i32 0, i32 2, i32 undef, i32 undef>
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ret <4 x i32> %res1
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}
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define <4 x i32> @undef_splatmask3(<4 x i32> %v) nounwind {
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; AVX2-LABEL: undef_splatmask3:
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; AVX2: # %bb.0:
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; AVX2-NEXT: vpermilps {{.*#+}} xmm0 = xmm0[2,2,3,3]
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; AVX2-NEXT: retq
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%res = shufflevector <4 x i32> %v, <4 x i32> undef, <4 x i32> <i32 2, i32 undef, i32 2, i32 undef>
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%res1 = shufflevector <4 x i32> %res, <4 x i32> undef, <4 x i32> <i32 0, i32 2, i32 undef, i32 3>
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ret <4 x i32> %res1
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}
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define <4 x i32> @undef_splatmask4(<4 x i32> %v, <4 x i32>* %p) nounwind {
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; AVX2-LABEL: undef_splatmask4:
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; AVX2: # %bb.0:
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; AVX2-NEXT: vpermilps {{.*#+}} xmm1 = xmm0[2,2,3,3]
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; AVX2-NEXT: vpermilps {{.*#+}} xmm0 = xmm0[2,3,2,3]
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; AVX2-NEXT: vmovaps %xmm0, (%rdi)
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; AVX2-NEXT: vmovaps %xmm1, %xmm0
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; AVX2-NEXT: retq
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%res = shufflevector <4 x i32> %v, <4 x i32> undef, <4 x i32> <i32 2, i32 undef, i32 2, i32 undef>
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%res1 = shufflevector <4 x i32> %res, <4 x i32> undef, <4 x i32> <i32 0, i32 2, i32 undef, i32 undef>
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store <4 x i32> %res, <4 x i32>* %p
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ret <4 x i32> %res1
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}
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define <4 x i32> @undef_splatmask5(<4 x i32> %v, <4 x i32>* %p) nounwind {
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; AVX2-LABEL: undef_splatmask5:
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; AVX2: # %bb.0:
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; AVX2-NEXT: vbroadcastss %xmm0, %xmm0
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; AVX2-NEXT: vmovaps %xmm0, (%rdi)
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; AVX2-NEXT: retq
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%res = shufflevector <4 x i32> %v, <4 x i32> undef, <4 x i32> <i32 0, i32 undef, i32 0, i32 undef>
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%res1 = shufflevector <4 x i32> %res, <4 x i32> undef, <4 x i32> <i32 0, i32 2, i32 undef, i32 3>
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store <4 x i32> %res, <4 x i32>* %p
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ret <4 x i32> %res1
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}
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