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Folks on Windows, remember to set up your subversion to strip these when submitting... git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225593 91177308-0d34-0410-b5e6-96231b3b80d8
83 lines
3.1 KiB
LLVM
83 lines
3.1 KiB
LLVM
target triple = "x86_64-unknown-unknown"
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; RUN: llc < %s -march=x86-64 -mattr=+avx | FileCheck %s
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; When extracting multiple consecutive elements from a larger
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; vector into a smaller one, do it efficiently. We should use
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; an EXTRACT_SUBVECTOR node internally rather than a bunch of
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; single element extractions.
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; Extracting the low elements only requires using the right kind of store.
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define void @low_v8f32_to_v4f32(<8 x float> %v, <4 x float>* %ptr) {
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%ext0 = extractelement <8 x float> %v, i32 0
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%ext1 = extractelement <8 x float> %v, i32 1
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%ext2 = extractelement <8 x float> %v, i32 2
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%ext3 = extractelement <8 x float> %v, i32 3
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%ins0 = insertelement <4 x float> undef, float %ext0, i32 0
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%ins1 = insertelement <4 x float> %ins0, float %ext1, i32 1
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%ins2 = insertelement <4 x float> %ins1, float %ext2, i32 2
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%ins3 = insertelement <4 x float> %ins2, float %ext3, i32 3
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store <4 x float> %ins3, <4 x float>* %ptr, align 16
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ret void
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; CHECK-LABEL: low_v8f32_to_v4f32
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; CHECK: vmovaps
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; CHECK-NEXT: vzeroupper
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; CHECK-NEXT: retq
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}
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; Extracting the high elements requires just one AVX instruction.
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define void @high_v8f32_to_v4f32(<8 x float> %v, <4 x float>* %ptr) {
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%ext0 = extractelement <8 x float> %v, i32 4
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%ext1 = extractelement <8 x float> %v, i32 5
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%ext2 = extractelement <8 x float> %v, i32 6
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%ext3 = extractelement <8 x float> %v, i32 7
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%ins0 = insertelement <4 x float> undef, float %ext0, i32 0
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%ins1 = insertelement <4 x float> %ins0, float %ext1, i32 1
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%ins2 = insertelement <4 x float> %ins1, float %ext2, i32 2
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%ins3 = insertelement <4 x float> %ins2, float %ext3, i32 3
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store <4 x float> %ins3, <4 x float>* %ptr, align 16
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ret void
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; CHECK-LABEL: high_v8f32_to_v4f32
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; CHECK: vextractf128
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; CHECK-NEXT: vzeroupper
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; CHECK-NEXT: retq
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}
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; Make sure element type doesn't alter the codegen. Note that
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; if we were actually using the vector in this function and
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; have AVX2, we should generate vextracti128 (the int version).
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define void @high_v8i32_to_v4i32(<8 x i32> %v, <4 x i32>* %ptr) {
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%ext0 = extractelement <8 x i32> %v, i32 4
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%ext1 = extractelement <8 x i32> %v, i32 5
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%ext2 = extractelement <8 x i32> %v, i32 6
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%ext3 = extractelement <8 x i32> %v, i32 7
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%ins0 = insertelement <4 x i32> undef, i32 %ext0, i32 0
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%ins1 = insertelement <4 x i32> %ins0, i32 %ext1, i32 1
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%ins2 = insertelement <4 x i32> %ins1, i32 %ext2, i32 2
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%ins3 = insertelement <4 x i32> %ins2, i32 %ext3, i32 3
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store <4 x i32> %ins3, <4 x i32>* %ptr, align 16
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ret void
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; CHECK-LABEL: high_v8i32_to_v4i32
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; CHECK: vextractf128
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; CHECK-NEXT: vzeroupper
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; CHECK-NEXT: retq
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}
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; Make sure that element size doesn't alter the codegen.
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define void @high_v4f64_to_v2f64(<4 x double> %v, <2 x double>* %ptr) {
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%ext0 = extractelement <4 x double> %v, i32 2
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%ext1 = extractelement <4 x double> %v, i32 3
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%ins0 = insertelement <2 x double> undef, double %ext0, i32 0
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%ins1 = insertelement <2 x double> %ins0, double %ext1, i32 1
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store <2 x double> %ins1, <2 x double>* %ptr, align 16
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ret void
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; CHECK-LABEL: high_v4f64_to_v2f64
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; CHECK: vextractf128
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; CHECK-NEXT: vzeroupper
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; CHECK-NEXT: retq
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}
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