llvm-project/llvm/test/CodeGen/X86/vector-blend.ll

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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+sse2 | FileCheck %s --check-prefix=SSE --check-prefix=SSE2
; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+ssse3 | FileCheck %s --check-prefix=SSE --check-prefix=SSSE3
; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+sse4.1 | FileCheck %s --check-prefix=SSE --check-prefix=SSE41
; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+avx | FileCheck %s --check-prefix=AVX --check-prefix=AVX1
; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+avx2 | FileCheck %s --check-prefix=AVX --check-prefix=AVX2
; AVX128 tests:
define <4 x float> @vsel_float(<4 x float> %v1, <4 x float> %v2) {
; SSE2-LABEL: vsel_float:
; SSE2: # %bb.0: # %entry
[x86,sdag] Two interrelated changes to the x86 and sdag code. First, don't combine bit masking into vector shuffles (even ones the target can handle) once operation legalization has taken place. Custom legalization of vector shuffles may exist for these patterns (making the predicate return true) but that custom legalization may in some cases produce the exact bit math this matches. We only really want to handle this prior to operation legalization. However, the x86 backend, in a fit of awesome, relied on this. What it would do is mark VSELECTs as expand, which would turn them into arithmetic, which this would then match back into vector shuffles, which we would then lower properly. Amazing. Instead, the second change is to teach the x86 backend to directly form vector shuffles from VSELECT nodes with constant conditions, and to mark all of the vector types we support lowering blends as shuffles as custom VSELECT lowering. We still mark the forms which actually support variable blends as *legal* so that the custom lowering is bypassed, and the legal lowering can even be used by the vector shuffle legalization (yes, i know, this is confusing. but that's how the patterns are written). This makes the VSELECT lowering much more sensible, and in fact should fix a bunch of bugs with it. However, as you'll see in the test cases, right now what it does is point out the *hilarious* deficiency of the new vector shuffle lowering when it comes to blends. Fortunately, my very next patch fixes that. I can't submit it yet, because that patch, somewhat obviously, forms the exact and/or pattern that the DAG combine is matching here! Without this patch, teaching the vector shuffle lowering to produce the right code infloops in the DAG combiner. With this patch alone, we produce terrible code but at least lower through the right paths. With both patches, all the regressions here should be fixed, and a bunch of the improvements (like using 2 shufps with no memory loads instead of 2 andps with memory loads and an orps) will stay. Win! There is one other change worth noting here. We had hilariously wrong vectorization cost estimates for vselect because we fell through to the code path that assumed all "expand" vector operations are scalarized. However, the "expand" lowering of VSELECT is vector bit math, most definitely not scalarized. So now we go back to the correct if horribly naive cost of "1" for "not scalarized". If anyone wants to add actual modeling of shuffle costs, that would be cool, but this seems an improvement on its own. Note the removal of 16 and 32 "costs" for doing a blend. Even in SSE2 we can blend in fewer than 16 instructions. ;] Of course, we don't right now because of OMG bad code, but I'm going to fix that. Next patch. I promise. llvm-svn: 229835
2015-02-19 18:36:19 +08:00
; SSE2-NEXT: shufps {{.*#+}} xmm0 = xmm0[0,2],xmm1[1,3]
; SSE2-NEXT: shufps {{.*#+}} xmm0 = xmm0[0,2,1,3]
; SSE2-NEXT: retq
;
; SSSE3-LABEL: vsel_float:
; SSSE3: # %bb.0: # %entry
[x86,sdag] Two interrelated changes to the x86 and sdag code. First, don't combine bit masking into vector shuffles (even ones the target can handle) once operation legalization has taken place. Custom legalization of vector shuffles may exist for these patterns (making the predicate return true) but that custom legalization may in some cases produce the exact bit math this matches. We only really want to handle this prior to operation legalization. However, the x86 backend, in a fit of awesome, relied on this. What it would do is mark VSELECTs as expand, which would turn them into arithmetic, which this would then match back into vector shuffles, which we would then lower properly. Amazing. Instead, the second change is to teach the x86 backend to directly form vector shuffles from VSELECT nodes with constant conditions, and to mark all of the vector types we support lowering blends as shuffles as custom VSELECT lowering. We still mark the forms which actually support variable blends as *legal* so that the custom lowering is bypassed, and the legal lowering can even be used by the vector shuffle legalization (yes, i know, this is confusing. but that's how the patterns are written). This makes the VSELECT lowering much more sensible, and in fact should fix a bunch of bugs with it. However, as you'll see in the test cases, right now what it does is point out the *hilarious* deficiency of the new vector shuffle lowering when it comes to blends. Fortunately, my very next patch fixes that. I can't submit it yet, because that patch, somewhat obviously, forms the exact and/or pattern that the DAG combine is matching here! Without this patch, teaching the vector shuffle lowering to produce the right code infloops in the DAG combiner. With this patch alone, we produce terrible code but at least lower through the right paths. With both patches, all the regressions here should be fixed, and a bunch of the improvements (like using 2 shufps with no memory loads instead of 2 andps with memory loads and an orps) will stay. Win! There is one other change worth noting here. We had hilariously wrong vectorization cost estimates for vselect because we fell through to the code path that assumed all "expand" vector operations are scalarized. However, the "expand" lowering of VSELECT is vector bit math, most definitely not scalarized. So now we go back to the correct if horribly naive cost of "1" for "not scalarized". If anyone wants to add actual modeling of shuffle costs, that would be cool, but this seems an improvement on its own. Note the removal of 16 and 32 "costs" for doing a blend. Even in SSE2 we can blend in fewer than 16 instructions. ;] Of course, we don't right now because of OMG bad code, but I'm going to fix that. Next patch. I promise. llvm-svn: 229835
2015-02-19 18:36:19 +08:00
; SSSE3-NEXT: shufps {{.*#+}} xmm0 = xmm0[0,2],xmm1[1,3]
; SSSE3-NEXT: shufps {{.*#+}} xmm0 = xmm0[0,2,1,3]
; SSSE3-NEXT: retq
;
; SSE41-LABEL: vsel_float:
; SSE41: # %bb.0: # %entry
; SSE41-NEXT: blendps {{.*#+}} xmm0 = xmm0[0],xmm1[1],xmm0[2],xmm1[3]
; SSE41-NEXT: retq
;
; AVX-LABEL: vsel_float:
; AVX: # %bb.0: # %entry
; AVX-NEXT: vblendps {{.*#+}} xmm0 = xmm0[0],xmm1[1],xmm0[2],xmm1[3]
; AVX-NEXT: retq
entry:
%vsel = select <4 x i1> <i1 true, i1 false, i1 true, i1 false>, <4 x float> %v1, <4 x float> %v2
ret <4 x float> %vsel
}
define <4 x float> @vsel_float2(<4 x float> %v1, <4 x float> %v2) {
; SSE2-LABEL: vsel_float2:
; SSE2: # %bb.0: # %entry
; SSE2-NEXT: movss {{.*#+}} xmm1 = xmm0[0],xmm1[1,2,3]
; SSE2-NEXT: movaps %xmm1, %xmm0
; SSE2-NEXT: retq
;
; SSSE3-LABEL: vsel_float2:
; SSSE3: # %bb.0: # %entry
; SSSE3-NEXT: movss {{.*#+}} xmm1 = xmm0[0],xmm1[1,2,3]
; SSSE3-NEXT: movaps %xmm1, %xmm0
; SSSE3-NEXT: retq
;
; SSE41-LABEL: vsel_float2:
; SSE41: # %bb.0: # %entry
; SSE41-NEXT: blendps {{.*#+}} xmm0 = xmm0[0],xmm1[1,2,3]
; SSE41-NEXT: retq
;
; AVX-LABEL: vsel_float2:
; AVX: # %bb.0: # %entry
; AVX-NEXT: vblendps {{.*#+}} xmm0 = xmm0[0],xmm1[1,2,3]
; AVX-NEXT: retq
entry:
%vsel = select <4 x i1> <i1 true, i1 false, i1 false, i1 false>, <4 x float> %v1, <4 x float> %v2
ret <4 x float> %vsel
}
define <4 x i8> @vsel_4xi8(<4 x i8> %v1, <4 x i8> %v2) {
; SSE2-LABEL: vsel_4xi8:
; SSE2: # %bb.0: # %entry
; SSE2-NEXT: movaps {{.*#+}} xmm2 = [255,255,0,255,255,255,255,255,255,255,255,255,255,255,255,255]
; SSE2-NEXT: andps %xmm2, %xmm0
; SSE2-NEXT: andnps %xmm1, %xmm2
; SSE2-NEXT: orps %xmm2, %xmm0
; SSE2-NEXT: retq
;
; SSSE3-LABEL: vsel_4xi8:
; SSSE3: # %bb.0: # %entry
; SSSE3-NEXT: punpcklbw {{.*#+}} xmm0 = xmm0[0],xmm1[0],xmm0[1],xmm1[1],xmm0[2],xmm1[2],xmm0[3],xmm1[3],xmm0[4],xmm1[4],xmm0[5],xmm1[5],xmm0[6],xmm1[6],xmm0[7],xmm1[7]
; SSSE3-NEXT: pshufb {{.*#+}} xmm0 = xmm0[0,2,5,6,u,u,u,u,u,u,u,u,u,u,u,u]
; SSSE3-NEXT: retq
;
; SSE41-LABEL: vsel_4xi8:
; SSE41: # %bb.0: # %entry
; SSE41-NEXT: movdqa %xmm0, %xmm2
; SSE41-NEXT: movaps {{.*#+}} xmm0 = <255,255,0,255,u,u,u,u,u,u,u,u,u,u,u,u>
; SSE41-NEXT: pblendvb %xmm0, %xmm2, %xmm1
; SSE41-NEXT: movdqa %xmm1, %xmm0
; SSE41-NEXT: retq
;
; AVX-LABEL: vsel_4xi8:
; AVX: # %bb.0: # %entry
; AVX-NEXT: vmovdqa {{.*#+}} xmm2 = <255,255,0,255,u,u,u,u,u,u,u,u,u,u,u,u>
; AVX-NEXT: vpblendvb %xmm2, %xmm0, %xmm1, %xmm0
; AVX-NEXT: retq
entry:
%vsel = select <4 x i1> <i1 true, i1 true, i1 false, i1 true>, <4 x i8> %v1, <4 x i8> %v2
ret <4 x i8> %vsel
}
define <4 x i16> @vsel_4xi16(<4 x i16> %v1, <4 x i16> %v2) {
; SSE2-LABEL: vsel_4xi16:
; SSE2: # %bb.0: # %entry
; SSE2-NEXT: movaps {{.*#+}} xmm2 = [65535,0,65535,65535,65535,65535,65535,65535]
; SSE2-NEXT: andps %xmm2, %xmm0
; SSE2-NEXT: andnps %xmm1, %xmm2
; SSE2-NEXT: orps %xmm2, %xmm0
; SSE2-NEXT: retq
;
; SSSE3-LABEL: vsel_4xi16:
; SSSE3: # %bb.0: # %entry
; SSSE3-NEXT: movaps {{.*#+}} xmm2 = [65535,0,65535,65535,65535,65535,65535,65535]
; SSSE3-NEXT: andps %xmm2, %xmm0
; SSSE3-NEXT: andnps %xmm1, %xmm2
; SSSE3-NEXT: orps %xmm2, %xmm0
; SSSE3-NEXT: retq
;
; SSE41-LABEL: vsel_4xi16:
; SSE41: # %bb.0: # %entry
; SSE41-NEXT: pblendw {{.*#+}} xmm0 = xmm0[0],xmm1[1],xmm0[2,3,4,5,6,7]
; SSE41-NEXT: retq
;
; AVX-LABEL: vsel_4xi16:
; AVX: # %bb.0: # %entry
; AVX-NEXT: vpblendw {{.*#+}} xmm0 = xmm0[0],xmm1[1],xmm0[2,3,4,5,6,7]
; AVX-NEXT: retq
entry:
%vsel = select <4 x i1> <i1 true, i1 false, i1 true, i1 true>, <4 x i16> %v1, <4 x i16> %v2
ret <4 x i16> %vsel
}
define <4 x i32> @vsel_i32(<4 x i32> %v1, <4 x i32> %v2) {
; SSE2-LABEL: vsel_i32:
; SSE2: # %bb.0: # %entry
[x86,sdag] Two interrelated changes to the x86 and sdag code. First, don't combine bit masking into vector shuffles (even ones the target can handle) once operation legalization has taken place. Custom legalization of vector shuffles may exist for these patterns (making the predicate return true) but that custom legalization may in some cases produce the exact bit math this matches. We only really want to handle this prior to operation legalization. However, the x86 backend, in a fit of awesome, relied on this. What it would do is mark VSELECTs as expand, which would turn them into arithmetic, which this would then match back into vector shuffles, which we would then lower properly. Amazing. Instead, the second change is to teach the x86 backend to directly form vector shuffles from VSELECT nodes with constant conditions, and to mark all of the vector types we support lowering blends as shuffles as custom VSELECT lowering. We still mark the forms which actually support variable blends as *legal* so that the custom lowering is bypassed, and the legal lowering can even be used by the vector shuffle legalization (yes, i know, this is confusing. but that's how the patterns are written). This makes the VSELECT lowering much more sensible, and in fact should fix a bunch of bugs with it. However, as you'll see in the test cases, right now what it does is point out the *hilarious* deficiency of the new vector shuffle lowering when it comes to blends. Fortunately, my very next patch fixes that. I can't submit it yet, because that patch, somewhat obviously, forms the exact and/or pattern that the DAG combine is matching here! Without this patch, teaching the vector shuffle lowering to produce the right code infloops in the DAG combiner. With this patch alone, we produce terrible code but at least lower through the right paths. With both patches, all the regressions here should be fixed, and a bunch of the improvements (like using 2 shufps with no memory loads instead of 2 andps with memory loads and an orps) will stay. Win! There is one other change worth noting here. We had hilariously wrong vectorization cost estimates for vselect because we fell through to the code path that assumed all "expand" vector operations are scalarized. However, the "expand" lowering of VSELECT is vector bit math, most definitely not scalarized. So now we go back to the correct if horribly naive cost of "1" for "not scalarized". If anyone wants to add actual modeling of shuffle costs, that would be cool, but this seems an improvement on its own. Note the removal of 16 and 32 "costs" for doing a blend. Even in SSE2 we can blend in fewer than 16 instructions. ;] Of course, we don't right now because of OMG bad code, but I'm going to fix that. Next patch. I promise. llvm-svn: 229835
2015-02-19 18:36:19 +08:00
; SSE2-NEXT: pshufd {{.*#+}} xmm1 = xmm1[1,3,2,3]
; SSE2-NEXT: pshufd {{.*#+}} xmm0 = xmm0[0,2,2,3]
; SSE2-NEXT: punpckldq {{.*#+}} xmm0 = xmm0[0],xmm1[0],xmm0[1],xmm1[1]
; SSE2-NEXT: retq
;
; SSSE3-LABEL: vsel_i32:
; SSSE3: # %bb.0: # %entry
[x86,sdag] Two interrelated changes to the x86 and sdag code. First, don't combine bit masking into vector shuffles (even ones the target can handle) once operation legalization has taken place. Custom legalization of vector shuffles may exist for these patterns (making the predicate return true) but that custom legalization may in some cases produce the exact bit math this matches. We only really want to handle this prior to operation legalization. However, the x86 backend, in a fit of awesome, relied on this. What it would do is mark VSELECTs as expand, which would turn them into arithmetic, which this would then match back into vector shuffles, which we would then lower properly. Amazing. Instead, the second change is to teach the x86 backend to directly form vector shuffles from VSELECT nodes with constant conditions, and to mark all of the vector types we support lowering blends as shuffles as custom VSELECT lowering. We still mark the forms which actually support variable blends as *legal* so that the custom lowering is bypassed, and the legal lowering can even be used by the vector shuffle legalization (yes, i know, this is confusing. but that's how the patterns are written). This makes the VSELECT lowering much more sensible, and in fact should fix a bunch of bugs with it. However, as you'll see in the test cases, right now what it does is point out the *hilarious* deficiency of the new vector shuffle lowering when it comes to blends. Fortunately, my very next patch fixes that. I can't submit it yet, because that patch, somewhat obviously, forms the exact and/or pattern that the DAG combine is matching here! Without this patch, teaching the vector shuffle lowering to produce the right code infloops in the DAG combiner. With this patch alone, we produce terrible code but at least lower through the right paths. With both patches, all the regressions here should be fixed, and a bunch of the improvements (like using 2 shufps with no memory loads instead of 2 andps with memory loads and an orps) will stay. Win! There is one other change worth noting here. We had hilariously wrong vectorization cost estimates for vselect because we fell through to the code path that assumed all "expand" vector operations are scalarized. However, the "expand" lowering of VSELECT is vector bit math, most definitely not scalarized. So now we go back to the correct if horribly naive cost of "1" for "not scalarized". If anyone wants to add actual modeling of shuffle costs, that would be cool, but this seems an improvement on its own. Note the removal of 16 and 32 "costs" for doing a blend. Even in SSE2 we can blend in fewer than 16 instructions. ;] Of course, we don't right now because of OMG bad code, but I'm going to fix that. Next patch. I promise. llvm-svn: 229835
2015-02-19 18:36:19 +08:00
; SSSE3-NEXT: pshufd {{.*#+}} xmm1 = xmm1[1,3,2,3]
; SSSE3-NEXT: pshufd {{.*#+}} xmm0 = xmm0[0,2,2,3]
; SSSE3-NEXT: punpckldq {{.*#+}} xmm0 = xmm0[0],xmm1[0],xmm0[1],xmm1[1]
; SSSE3-NEXT: retq
;
; SSE41-LABEL: vsel_i32:
; SSE41: # %bb.0: # %entry
; SSE41-NEXT: blendps {{.*#+}} xmm0 = xmm0[0],xmm1[1],xmm0[2],xmm1[3]
; SSE41-NEXT: retq
;
; AVX-LABEL: vsel_i32:
; AVX: # %bb.0: # %entry
; AVX-NEXT: vblendps {{.*#+}} xmm0 = xmm0[0],xmm1[1],xmm0[2],xmm1[3]
; AVX-NEXT: retq
entry:
%vsel = select <4 x i1> <i1 true, i1 false, i1 true, i1 false>, <4 x i32> %v1, <4 x i32> %v2
ret <4 x i32> %vsel
}
define <2 x double> @vsel_double(<2 x double> %v1, <2 x double> %v2) {
; SSE2-LABEL: vsel_double:
; SSE2: # %bb.0: # %entry
; SSE2-NEXT: shufps {{.*#+}} xmm0 = xmm0[0,1],xmm1[2,3]
; SSE2-NEXT: retq
;
; SSSE3-LABEL: vsel_double:
; SSSE3: # %bb.0: # %entry
; SSSE3-NEXT: shufps {{.*#+}} xmm0 = xmm0[0,1],xmm1[2,3]
; SSSE3-NEXT: retq
;
; SSE41-LABEL: vsel_double:
; SSE41: # %bb.0: # %entry
; SSE41-NEXT: blendps {{.*#+}} xmm0 = xmm0[0,1],xmm1[2,3]
; SSE41-NEXT: retq
;
; AVX-LABEL: vsel_double:
; AVX: # %bb.0: # %entry
; AVX-NEXT: vblendps {{.*#+}} xmm0 = xmm0[0,1],xmm1[2,3]
; AVX-NEXT: retq
entry:
%vsel = select <2 x i1> <i1 true, i1 false>, <2 x double> %v1, <2 x double> %v2
ret <2 x double> %vsel
}
define <2 x i64> @vsel_i64(<2 x i64> %v1, <2 x i64> %v2) {
; SSE2-LABEL: vsel_i64:
; SSE2: # %bb.0: # %entry
; SSE2-NEXT: shufps {{.*#+}} xmm0 = xmm0[0,1],xmm1[2,3]
; SSE2-NEXT: retq
;
; SSSE3-LABEL: vsel_i64:
; SSSE3: # %bb.0: # %entry
; SSSE3-NEXT: shufps {{.*#+}} xmm0 = xmm0[0,1],xmm1[2,3]
; SSSE3-NEXT: retq
;
; SSE41-LABEL: vsel_i64:
; SSE41: # %bb.0: # %entry
; SSE41-NEXT: blendps {{.*#+}} xmm0 = xmm0[0,1],xmm1[2,3]
; SSE41-NEXT: retq
;
; AVX-LABEL: vsel_i64:
; AVX: # %bb.0: # %entry
; AVX-NEXT: vblendps {{.*#+}} xmm0 = xmm0[0,1],xmm1[2,3]
; AVX-NEXT: retq
entry:
%vsel = select <2 x i1> <i1 true, i1 false>, <2 x i64> %v1, <2 x i64> %v2
ret <2 x i64> %vsel
}
define <8 x i16> @vsel_8xi16(<8 x i16> %v1, <8 x i16> %v2) {
; SSE2-LABEL: vsel_8xi16:
; SSE2: # %bb.0: # %entry
; SSE2-NEXT: movaps {{.*#+}} xmm2 = [0,65535,65535,65535,0,65535,65535,65535]
; SSE2-NEXT: andps %xmm2, %xmm1
; SSE2-NEXT: andnps %xmm0, %xmm2
; SSE2-NEXT: orps %xmm1, %xmm2
; SSE2-NEXT: movaps %xmm2, %xmm0
; SSE2-NEXT: retq
;
; SSSE3-LABEL: vsel_8xi16:
; SSSE3: # %bb.0: # %entry
; SSSE3-NEXT: movaps {{.*#+}} xmm2 = [0,65535,65535,65535,0,65535,65535,65535]
; SSSE3-NEXT: andps %xmm2, %xmm1
; SSSE3-NEXT: andnps %xmm0, %xmm2
; SSSE3-NEXT: orps %xmm1, %xmm2
; SSSE3-NEXT: movaps %xmm2, %xmm0
; SSSE3-NEXT: retq
;
; SSE41-LABEL: vsel_8xi16:
; SSE41: # %bb.0: # %entry
; SSE41-NEXT: pblendw {{.*#+}} xmm0 = xmm0[0],xmm1[1,2,3],xmm0[4],xmm1[5,6,7]
; SSE41-NEXT: retq
;
; AVX-LABEL: vsel_8xi16:
; AVX: # %bb.0: # %entry
; AVX-NEXT: vpblendw {{.*#+}} xmm0 = xmm0[0],xmm1[1,2,3],xmm0[4],xmm1[5,6,7]
; AVX-NEXT: retq
entry:
%vsel = select <8 x i1> <i1 true, i1 false, i1 false, i1 false, i1 true, i1 false, i1 false, i1 false>, <8 x i16> %v1, <8 x i16> %v2
ret <8 x i16> %vsel
}
define <16 x i8> @vsel_i8(<16 x i8> %v1, <16 x i8> %v2) {
; SSE2-LABEL: vsel_i8:
; SSE2: # %bb.0: # %entry
; SSE2-NEXT: movaps {{.*#+}} xmm2 = [0,255,255,255,0,255,255,255,0,255,255,255,0,255,255,255]
; SSE2-NEXT: andps %xmm2, %xmm1
; SSE2-NEXT: andnps %xmm0, %xmm2
; SSE2-NEXT: orps %xmm1, %xmm2
; SSE2-NEXT: movaps %xmm2, %xmm0
; SSE2-NEXT: retq
;
; SSSE3-LABEL: vsel_i8:
; SSSE3: # %bb.0: # %entry
; SSSE3-NEXT: pshufb {{.*#+}} xmm0 = xmm0[0],zero,zero,zero,xmm0[4],zero,zero,zero,xmm0[8],zero,zero,zero,xmm0[12],zero,zero,zero
; SSSE3-NEXT: pshufb {{.*#+}} xmm1 = zero,xmm1[1,2,3],zero,xmm1[5,6,7],zero,xmm1[9,10,11],zero,xmm1[13,14,15]
; SSSE3-NEXT: por %xmm1, %xmm0
; SSSE3-NEXT: retq
;
; SSE41-LABEL: vsel_i8:
; SSE41: # %bb.0: # %entry
; SSE41-NEXT: movdqa %xmm0, %xmm2
; SSE41-NEXT: movaps {{.*#+}} xmm0 = [0,255,255,255,0,255,255,255,0,255,255,255,0,255,255,255]
; SSE41-NEXT: pblendvb %xmm0, %xmm1, %xmm2
; SSE41-NEXT: movdqa %xmm2, %xmm0
; SSE41-NEXT: retq
;
; AVX-LABEL: vsel_i8:
; AVX: # %bb.0: # %entry
; AVX-NEXT: vmovdqa {{.*#+}} xmm2 = [0,255,255,255,0,255,255,255,0,255,255,255,0,255,255,255]
; AVX-NEXT: vpblendvb %xmm2, %xmm1, %xmm0, %xmm0
; AVX-NEXT: retq
entry:
%vsel = select <16 x i1> <i1 true, i1 false, i1 false, i1 false, i1 true, i1 false, i1 false, i1 false, i1 true, i1 false, i1 false, i1 false, i1 true, i1 false, i1 false, i1 false>, <16 x i8> %v1, <16 x i8> %v2
ret <16 x i8> %vsel
}
; AVX256 tests:
define <8 x float> @vsel_float8(<8 x float> %v1, <8 x float> %v2) {
; SSE2-LABEL: vsel_float8:
; SSE2: # %bb.0: # %entry
; SSE2-NEXT: movss {{.*#+}} xmm2 = xmm0[0],xmm2[1,2,3]
; SSE2-NEXT: movss {{.*#+}} xmm3 = xmm1[0],xmm3[1,2,3]
; SSE2-NEXT: movaps %xmm2, %xmm0
; SSE2-NEXT: movaps %xmm3, %xmm1
; SSE2-NEXT: retq
;
; SSSE3-LABEL: vsel_float8:
; SSSE3: # %bb.0: # %entry
; SSSE3-NEXT: movss {{.*#+}} xmm2 = xmm0[0],xmm2[1,2,3]
; SSSE3-NEXT: movss {{.*#+}} xmm3 = xmm1[0],xmm3[1,2,3]
; SSSE3-NEXT: movaps %xmm2, %xmm0
; SSSE3-NEXT: movaps %xmm3, %xmm1
; SSSE3-NEXT: retq
;
; SSE41-LABEL: vsel_float8:
; SSE41: # %bb.0: # %entry
; SSE41-NEXT: blendps {{.*#+}} xmm0 = xmm0[0],xmm2[1,2,3]
; SSE41-NEXT: blendps {{.*#+}} xmm1 = xmm1[0],xmm3[1,2,3]
; SSE41-NEXT: retq
;
; AVX-LABEL: vsel_float8:
; AVX: # %bb.0: # %entry
; AVX-NEXT: vblendps {{.*#+}} ymm0 = ymm0[0],ymm1[1,2,3],ymm0[4],ymm1[5,6,7]
; AVX-NEXT: retq
entry:
%vsel = select <8 x i1> <i1 true, i1 false, i1 false, i1 false, i1 true, i1 false, i1 false, i1 false>, <8 x float> %v1, <8 x float> %v2
ret <8 x float> %vsel
}
define <8 x i32> @vsel_i328(<8 x i32> %v1, <8 x i32> %v2) {
; SSE2-LABEL: vsel_i328:
; SSE2: # %bb.0: # %entry
; SSE2-NEXT: movss {{.*#+}} xmm2 = xmm0[0],xmm2[1,2,3]
; SSE2-NEXT: movss {{.*#+}} xmm3 = xmm1[0],xmm3[1,2,3]
; SSE2-NEXT: movaps %xmm2, %xmm0
; SSE2-NEXT: movaps %xmm3, %xmm1
; SSE2-NEXT: retq
;
; SSSE3-LABEL: vsel_i328:
; SSSE3: # %bb.0: # %entry
; SSSE3-NEXT: movss {{.*#+}} xmm2 = xmm0[0],xmm2[1,2,3]
; SSSE3-NEXT: movss {{.*#+}} xmm3 = xmm1[0],xmm3[1,2,3]
; SSSE3-NEXT: movaps %xmm2, %xmm0
; SSSE3-NEXT: movaps %xmm3, %xmm1
; SSSE3-NEXT: retq
;
; SSE41-LABEL: vsel_i328:
; SSE41: # %bb.0: # %entry
; SSE41-NEXT: blendps {{.*#+}} xmm0 = xmm0[0],xmm2[1,2,3]
; SSE41-NEXT: blendps {{.*#+}} xmm1 = xmm1[0],xmm3[1,2,3]
; SSE41-NEXT: retq
;
; AVX-LABEL: vsel_i328:
; AVX: # %bb.0: # %entry
; AVX-NEXT: vblendps {{.*#+}} ymm0 = ymm0[0],ymm1[1,2,3],ymm0[4],ymm1[5,6,7]
; AVX-NEXT: retq
entry:
%vsel = select <8 x i1> <i1 true, i1 false, i1 false, i1 false, i1 true, i1 false, i1 false, i1 false>, <8 x i32> %v1, <8 x i32> %v2
ret <8 x i32> %vsel
}
define <8 x double> @vsel_double8(<8 x double> %v1, <8 x double> %v2) {
; SSE2-LABEL: vsel_double8:
; SSE2: # %bb.0: # %entry
; SSE2-NEXT: movaps %xmm7, %xmm3
; SSE2-NEXT: movaps %xmm5, %xmm1
; SSE2-NEXT: shufps {{.*#+}} xmm0 = xmm0[0,1],xmm4[2,3]
; SSE2-NEXT: shufps {{.*#+}} xmm2 = xmm2[0,1],xmm6[2,3]
; SSE2-NEXT: retq
;
; SSSE3-LABEL: vsel_double8:
; SSSE3: # %bb.0: # %entry
; SSSE3-NEXT: movaps %xmm7, %xmm3
; SSSE3-NEXT: movaps %xmm5, %xmm1
; SSSE3-NEXT: shufps {{.*#+}} xmm0 = xmm0[0,1],xmm4[2,3]
; SSSE3-NEXT: shufps {{.*#+}} xmm2 = xmm2[0,1],xmm6[2,3]
; SSSE3-NEXT: retq
;
; SSE41-LABEL: vsel_double8:
; SSE41: # %bb.0: # %entry
; SSE41-NEXT: movaps %xmm7, %xmm3
; SSE41-NEXT: movaps %xmm5, %xmm1
; SSE41-NEXT: blendps {{.*#+}} xmm0 = xmm0[0,1],xmm4[2,3]
; SSE41-NEXT: blendps {{.*#+}} xmm2 = xmm2[0,1],xmm6[2,3]
; SSE41-NEXT: retq
;
; AVX-LABEL: vsel_double8:
; AVX: # %bb.0: # %entry
; AVX-NEXT: vblendps {{.*#+}} ymm0 = ymm0[0,1],ymm2[2,3,4,5,6,7]
; AVX-NEXT: vblendps {{.*#+}} ymm1 = ymm1[0,1],ymm3[2,3,4,5,6,7]
; AVX-NEXT: retq
entry:
%vsel = select <8 x i1> <i1 true, i1 false, i1 false, i1 false, i1 true, i1 false, i1 false, i1 false>, <8 x double> %v1, <8 x double> %v2
ret <8 x double> %vsel
}
define <8 x i64> @vsel_i648(<8 x i64> %v1, <8 x i64> %v2) {
; SSE2-LABEL: vsel_i648:
; SSE2: # %bb.0: # %entry
; SSE2-NEXT: movaps %xmm7, %xmm3
; SSE2-NEXT: movaps %xmm5, %xmm1
; SSE2-NEXT: shufps {{.*#+}} xmm0 = xmm0[0,1],xmm4[2,3]
; SSE2-NEXT: shufps {{.*#+}} xmm2 = xmm2[0,1],xmm6[2,3]
; SSE2-NEXT: retq
;
; SSSE3-LABEL: vsel_i648:
; SSSE3: # %bb.0: # %entry
; SSSE3-NEXT: movaps %xmm7, %xmm3
; SSSE3-NEXT: movaps %xmm5, %xmm1
; SSSE3-NEXT: shufps {{.*#+}} xmm0 = xmm0[0,1],xmm4[2,3]
; SSSE3-NEXT: shufps {{.*#+}} xmm2 = xmm2[0,1],xmm6[2,3]
; SSSE3-NEXT: retq
;
; SSE41-LABEL: vsel_i648:
; SSE41: # %bb.0: # %entry
; SSE41-NEXT: movaps %xmm7, %xmm3
; SSE41-NEXT: movaps %xmm5, %xmm1
; SSE41-NEXT: blendps {{.*#+}} xmm0 = xmm0[0,1],xmm4[2,3]
; SSE41-NEXT: blendps {{.*#+}} xmm2 = xmm2[0,1],xmm6[2,3]
; SSE41-NEXT: retq
;
; AVX-LABEL: vsel_i648:
; AVX: # %bb.0: # %entry
; AVX-NEXT: vblendps {{.*#+}} ymm0 = ymm0[0,1],ymm2[2,3,4,5,6,7]
; AVX-NEXT: vblendps {{.*#+}} ymm1 = ymm1[0,1],ymm3[2,3,4,5,6,7]
; AVX-NEXT: retq
entry:
%vsel = select <8 x i1> <i1 true, i1 false, i1 false, i1 false, i1 true, i1 false, i1 false, i1 false>, <8 x i64> %v1, <8 x i64> %v2
ret <8 x i64> %vsel
}
define <4 x double> @vsel_double4(<4 x double> %v1, <4 x double> %v2) {
; SSE2-LABEL: vsel_double4:
; SSE2: # %bb.0: # %entry
; SSE2-NEXT: shufps {{.*#+}} xmm0 = xmm0[0,1],xmm2[2,3]
; SSE2-NEXT: shufps {{.*#+}} xmm1 = xmm1[0,1],xmm3[2,3]
; SSE2-NEXT: retq
;
; SSSE3-LABEL: vsel_double4:
; SSSE3: # %bb.0: # %entry
; SSSE3-NEXT: shufps {{.*#+}} xmm0 = xmm0[0,1],xmm2[2,3]
; SSSE3-NEXT: shufps {{.*#+}} xmm1 = xmm1[0,1],xmm3[2,3]
; SSSE3-NEXT: retq
;
; SSE41-LABEL: vsel_double4:
; SSE41: # %bb.0: # %entry
; SSE41-NEXT: blendps {{.*#+}} xmm0 = xmm0[0,1],xmm2[2,3]
; SSE41-NEXT: blendps {{.*#+}} xmm1 = xmm1[0,1],xmm3[2,3]
; SSE41-NEXT: retq
;
; AVX-LABEL: vsel_double4:
; AVX: # %bb.0: # %entry
; AVX-NEXT: vblendps {{.*#+}} ymm0 = ymm0[0,1],ymm1[2,3],ymm0[4,5],ymm1[6,7]
; AVX-NEXT: retq
entry:
%vsel = select <4 x i1> <i1 true, i1 false, i1 true, i1 false>, <4 x double> %v1, <4 x double> %v2
ret <4 x double> %vsel
}
define <2 x double> @testa(<2 x double> %x, <2 x double> %y) {
; SSE2-LABEL: testa:
; SSE2: # %bb.0: # %entry
; SSE2-NEXT: movapd %xmm1, %xmm2
; SSE2-NEXT: cmplepd %xmm0, %xmm2
; SSE2-NEXT: andpd %xmm2, %xmm0
; SSE2-NEXT: andnpd %xmm1, %xmm2
; SSE2-NEXT: orpd %xmm2, %xmm0
; SSE2-NEXT: retq
;
; SSSE3-LABEL: testa:
; SSSE3: # %bb.0: # %entry
; SSSE3-NEXT: movapd %xmm1, %xmm2
; SSSE3-NEXT: cmplepd %xmm0, %xmm2
; SSSE3-NEXT: andpd %xmm2, %xmm0
; SSSE3-NEXT: andnpd %xmm1, %xmm2
; SSSE3-NEXT: orpd %xmm2, %xmm0
; SSSE3-NEXT: retq
;
; SSE41-LABEL: testa:
; SSE41: # %bb.0: # %entry
; SSE41-NEXT: movapd %xmm0, %xmm2
; SSE41-NEXT: movapd %xmm1, %xmm0
; SSE41-NEXT: cmplepd %xmm2, %xmm0
; SSE41-NEXT: blendvpd %xmm0, %xmm2, %xmm1
; SSE41-NEXT: movapd %xmm1, %xmm0
; SSE41-NEXT: retq
;
; AVX-LABEL: testa:
; AVX: # %bb.0: # %entry
; AVX-NEXT: vcmplepd %xmm0, %xmm1, %xmm2
; AVX-NEXT: vblendvpd %xmm2, %xmm0, %xmm1, %xmm0
; AVX-NEXT: retq
entry:
%max_is_x = fcmp oge <2 x double> %x, %y
%max = select <2 x i1> %max_is_x, <2 x double> %x, <2 x double> %y
ret <2 x double> %max
}
define <2 x double> @testb(<2 x double> %x, <2 x double> %y) {
; SSE2-LABEL: testb:
; SSE2: # %bb.0: # %entry
; SSE2-NEXT: movapd %xmm1, %xmm2
; SSE2-NEXT: cmpnlepd %xmm0, %xmm2
; SSE2-NEXT: andpd %xmm2, %xmm0
; SSE2-NEXT: andnpd %xmm1, %xmm2
; SSE2-NEXT: orpd %xmm2, %xmm0
; SSE2-NEXT: retq
;
; SSSE3-LABEL: testb:
; SSSE3: # %bb.0: # %entry
; SSSE3-NEXT: movapd %xmm1, %xmm2
; SSSE3-NEXT: cmpnlepd %xmm0, %xmm2
; SSSE3-NEXT: andpd %xmm2, %xmm0
; SSSE3-NEXT: andnpd %xmm1, %xmm2
; SSSE3-NEXT: orpd %xmm2, %xmm0
; SSSE3-NEXT: retq
;
; SSE41-LABEL: testb:
; SSE41: # %bb.0: # %entry
; SSE41-NEXT: movapd %xmm0, %xmm2
; SSE41-NEXT: movapd %xmm1, %xmm0
; SSE41-NEXT: cmpnlepd %xmm2, %xmm0
; SSE41-NEXT: blendvpd %xmm0, %xmm2, %xmm1
; SSE41-NEXT: movapd %xmm1, %xmm0
; SSE41-NEXT: retq
;
; AVX-LABEL: testb:
; AVX: # %bb.0: # %entry
; AVX-NEXT: vcmpnlepd %xmm0, %xmm1, %xmm2
; AVX-NEXT: vblendvpd %xmm2, %xmm0, %xmm1, %xmm0
; AVX-NEXT: retq
entry:
%min_is_x = fcmp ult <2 x double> %x, %y
%min = select <2 x i1> %min_is_x, <2 x double> %x, <2 x double> %y
ret <2 x double> %min
}
; If we can figure out a blend has a constant mask, we should emit the
; blend instruction with an immediate mask
define <4 x double> @constant_blendvpd_avx(<4 x double> %xy, <4 x double> %ab) {
; SSE2-LABEL: constant_blendvpd_avx:
; SSE2: # %bb.0: # %entry
; SSE2-NEXT: movaps %xmm2, %xmm0
; SSE2-NEXT: shufps {{.*#+}} xmm1 = xmm1[0,1],xmm3[2,3]
; SSE2-NEXT: retq
;
; SSSE3-LABEL: constant_blendvpd_avx:
; SSSE3: # %bb.0: # %entry
; SSSE3-NEXT: movaps %xmm2, %xmm0
; SSSE3-NEXT: shufps {{.*#+}} xmm1 = xmm1[0,1],xmm3[2,3]
; SSSE3-NEXT: retq
;
; SSE41-LABEL: constant_blendvpd_avx:
; SSE41: # %bb.0: # %entry
; SSE41-NEXT: movaps %xmm2, %xmm0
; SSE41-NEXT: blendps {{.*#+}} xmm1 = xmm1[0,1],xmm3[2,3]
; SSE41-NEXT: retq
;
; AVX-LABEL: constant_blendvpd_avx:
; AVX: # %bb.0: # %entry
; AVX-NEXT: vblendps {{.*#+}} ymm0 = ymm1[0,1,2,3],ymm0[4,5],ymm1[6,7]
; AVX-NEXT: retq
entry:
%select = select <4 x i1> <i1 false, i1 false, i1 true, i1 false>, <4 x double> %xy, <4 x double> %ab
ret <4 x double> %select
}
define <8 x float> @constant_blendvps_avx(<8 x float> %xyzw, <8 x float> %abcd) {
; SSE2-LABEL: constant_blendvps_avx:
; SSE2: # %bb.0: # %entry
[x86,sdag] Two interrelated changes to the x86 and sdag code. First, don't combine bit masking into vector shuffles (even ones the target can handle) once operation legalization has taken place. Custom legalization of vector shuffles may exist for these patterns (making the predicate return true) but that custom legalization may in some cases produce the exact bit math this matches. We only really want to handle this prior to operation legalization. However, the x86 backend, in a fit of awesome, relied on this. What it would do is mark VSELECTs as expand, which would turn them into arithmetic, which this would then match back into vector shuffles, which we would then lower properly. Amazing. Instead, the second change is to teach the x86 backend to directly form vector shuffles from VSELECT nodes with constant conditions, and to mark all of the vector types we support lowering blends as shuffles as custom VSELECT lowering. We still mark the forms which actually support variable blends as *legal* so that the custom lowering is bypassed, and the legal lowering can even be used by the vector shuffle legalization (yes, i know, this is confusing. but that's how the patterns are written). This makes the VSELECT lowering much more sensible, and in fact should fix a bunch of bugs with it. However, as you'll see in the test cases, right now what it does is point out the *hilarious* deficiency of the new vector shuffle lowering when it comes to blends. Fortunately, my very next patch fixes that. I can't submit it yet, because that patch, somewhat obviously, forms the exact and/or pattern that the DAG combine is matching here! Without this patch, teaching the vector shuffle lowering to produce the right code infloops in the DAG combiner. With this patch alone, we produce terrible code but at least lower through the right paths. With both patches, all the regressions here should be fixed, and a bunch of the improvements (like using 2 shufps with no memory loads instead of 2 andps with memory loads and an orps) will stay. Win! There is one other change worth noting here. We had hilariously wrong vectorization cost estimates for vselect because we fell through to the code path that assumed all "expand" vector operations are scalarized. However, the "expand" lowering of VSELECT is vector bit math, most definitely not scalarized. So now we go back to the correct if horribly naive cost of "1" for "not scalarized". If anyone wants to add actual modeling of shuffle costs, that would be cool, but this seems an improvement on its own. Note the removal of 16 and 32 "costs" for doing a blend. Even in SSE2 we can blend in fewer than 16 instructions. ;] Of course, we don't right now because of OMG bad code, but I'm going to fix that. Next patch. I promise. llvm-svn: 229835
2015-02-19 18:36:19 +08:00
; SSE2-NEXT: shufps {{.*#+}} xmm0 = xmm0[3,0],xmm2[2,0]
; SSE2-NEXT: shufps {{.*#+}} xmm2 = xmm2[0,1],xmm0[2,0]
; SSE2-NEXT: shufps {{.*#+}} xmm1 = xmm1[3,0],xmm3[2,0]
; SSE2-NEXT: shufps {{.*#+}} xmm3 = xmm3[0,1],xmm1[2,0]
; SSE2-NEXT: movaps %xmm2, %xmm0
; SSE2-NEXT: movaps %xmm3, %xmm1
; SSE2-NEXT: retq
;
; SSSE3-LABEL: constant_blendvps_avx:
; SSSE3: # %bb.0: # %entry
[x86,sdag] Two interrelated changes to the x86 and sdag code. First, don't combine bit masking into vector shuffles (even ones the target can handle) once operation legalization has taken place. Custom legalization of vector shuffles may exist for these patterns (making the predicate return true) but that custom legalization may in some cases produce the exact bit math this matches. We only really want to handle this prior to operation legalization. However, the x86 backend, in a fit of awesome, relied on this. What it would do is mark VSELECTs as expand, which would turn them into arithmetic, which this would then match back into vector shuffles, which we would then lower properly. Amazing. Instead, the second change is to teach the x86 backend to directly form vector shuffles from VSELECT nodes with constant conditions, and to mark all of the vector types we support lowering blends as shuffles as custom VSELECT lowering. We still mark the forms which actually support variable blends as *legal* so that the custom lowering is bypassed, and the legal lowering can even be used by the vector shuffle legalization (yes, i know, this is confusing. but that's how the patterns are written). This makes the VSELECT lowering much more sensible, and in fact should fix a bunch of bugs with it. However, as you'll see in the test cases, right now what it does is point out the *hilarious* deficiency of the new vector shuffle lowering when it comes to blends. Fortunately, my very next patch fixes that. I can't submit it yet, because that patch, somewhat obviously, forms the exact and/or pattern that the DAG combine is matching here! Without this patch, teaching the vector shuffle lowering to produce the right code infloops in the DAG combiner. With this patch alone, we produce terrible code but at least lower through the right paths. With both patches, all the regressions here should be fixed, and a bunch of the improvements (like using 2 shufps with no memory loads instead of 2 andps with memory loads and an orps) will stay. Win! There is one other change worth noting here. We had hilariously wrong vectorization cost estimates for vselect because we fell through to the code path that assumed all "expand" vector operations are scalarized. However, the "expand" lowering of VSELECT is vector bit math, most definitely not scalarized. So now we go back to the correct if horribly naive cost of "1" for "not scalarized". If anyone wants to add actual modeling of shuffle costs, that would be cool, but this seems an improvement on its own. Note the removal of 16 and 32 "costs" for doing a blend. Even in SSE2 we can blend in fewer than 16 instructions. ;] Of course, we don't right now because of OMG bad code, but I'm going to fix that. Next patch. I promise. llvm-svn: 229835
2015-02-19 18:36:19 +08:00
; SSSE3-NEXT: shufps {{.*#+}} xmm0 = xmm0[3,0],xmm2[2,0]
; SSSE3-NEXT: shufps {{.*#+}} xmm2 = xmm2[0,1],xmm0[2,0]
; SSSE3-NEXT: shufps {{.*#+}} xmm1 = xmm1[3,0],xmm3[2,0]
; SSSE3-NEXT: shufps {{.*#+}} xmm3 = xmm3[0,1],xmm1[2,0]
; SSSE3-NEXT: movaps %xmm2, %xmm0
; SSSE3-NEXT: movaps %xmm3, %xmm1
; SSSE3-NEXT: retq
;
; SSE41-LABEL: constant_blendvps_avx:
; SSE41: # %bb.0: # %entry
; SSE41-NEXT: blendps {{.*#+}} xmm0 = xmm2[0,1,2],xmm0[3]
; SSE41-NEXT: blendps {{.*#+}} xmm1 = xmm3[0,1,2],xmm1[3]
; SSE41-NEXT: retq
;
; AVX-LABEL: constant_blendvps_avx:
; AVX: # %bb.0: # %entry
; AVX-NEXT: vblendps {{.*#+}} ymm0 = ymm1[0,1,2],ymm0[3],ymm1[4,5,6],ymm0[7]
; AVX-NEXT: retq
entry:
%select = select <8 x i1> <i1 false, i1 false, i1 false, i1 true, i1 false, i1 false, i1 false, i1 true>, <8 x float> %xyzw, <8 x float> %abcd
ret <8 x float> %select
}
define <32 x i8> @constant_pblendvb_avx2(<32 x i8> %xyzw, <32 x i8> %abcd) {
; SSE2-LABEL: constant_pblendvb_avx2:
; SSE2: # %bb.0: # %entry
; SSE2-NEXT: movaps {{.*#+}} xmm4 = [255,255,0,255,0,0,0,255,255,255,0,255,0,0,0,255]
; SSE2-NEXT: movaps %xmm4, %xmm5
; SSE2-NEXT: andnps %xmm0, %xmm5
; SSE2-NEXT: andps %xmm4, %xmm2
; SSE2-NEXT: orps %xmm2, %xmm5
; SSE2-NEXT: andps %xmm4, %xmm3
; SSE2-NEXT: andnps %xmm1, %xmm4
; SSE2-NEXT: orps %xmm3, %xmm4
; SSE2-NEXT: movaps %xmm5, %xmm0
; SSE2-NEXT: movaps %xmm4, %xmm1
; SSE2-NEXT: retq
;
; SSSE3-LABEL: constant_pblendvb_avx2:
; SSSE3: # %bb.0: # %entry
; SSSE3-NEXT: movdqa {{.*#+}} xmm4 = [128,128,2,128,4,5,6,128,128,128,10,128,12,13,14,128]
; SSSE3-NEXT: pshufb %xmm4, %xmm0
; SSSE3-NEXT: movdqa {{.*#+}} xmm5 = [0,1,128,3,128,128,128,7,8,9,128,11,128,128,128,15]
; SSSE3-NEXT: pshufb %xmm5, %xmm2
[x86,sdag] Two interrelated changes to the x86 and sdag code. First, don't combine bit masking into vector shuffles (even ones the target can handle) once operation legalization has taken place. Custom legalization of vector shuffles may exist for these patterns (making the predicate return true) but that custom legalization may in some cases produce the exact bit math this matches. We only really want to handle this prior to operation legalization. However, the x86 backend, in a fit of awesome, relied on this. What it would do is mark VSELECTs as expand, which would turn them into arithmetic, which this would then match back into vector shuffles, which we would then lower properly. Amazing. Instead, the second change is to teach the x86 backend to directly form vector shuffles from VSELECT nodes with constant conditions, and to mark all of the vector types we support lowering blends as shuffles as custom VSELECT lowering. We still mark the forms which actually support variable blends as *legal* so that the custom lowering is bypassed, and the legal lowering can even be used by the vector shuffle legalization (yes, i know, this is confusing. but that's how the patterns are written). This makes the VSELECT lowering much more sensible, and in fact should fix a bunch of bugs with it. However, as you'll see in the test cases, right now what it does is point out the *hilarious* deficiency of the new vector shuffle lowering when it comes to blends. Fortunately, my very next patch fixes that. I can't submit it yet, because that patch, somewhat obviously, forms the exact and/or pattern that the DAG combine is matching here! Without this patch, teaching the vector shuffle lowering to produce the right code infloops in the DAG combiner. With this patch alone, we produce terrible code but at least lower through the right paths. With both patches, all the regressions here should be fixed, and a bunch of the improvements (like using 2 shufps with no memory loads instead of 2 andps with memory loads and an orps) will stay. Win! There is one other change worth noting here. We had hilariously wrong vectorization cost estimates for vselect because we fell through to the code path that assumed all "expand" vector operations are scalarized. However, the "expand" lowering of VSELECT is vector bit math, most definitely not scalarized. So now we go back to the correct if horribly naive cost of "1" for "not scalarized". If anyone wants to add actual modeling of shuffle costs, that would be cool, but this seems an improvement on its own. Note the removal of 16 and 32 "costs" for doing a blend. Even in SSE2 we can blend in fewer than 16 instructions. ;] Of course, we don't right now because of OMG bad code, but I'm going to fix that. Next patch. I promise. llvm-svn: 229835
2015-02-19 18:36:19 +08:00
; SSSE3-NEXT: por %xmm2, %xmm0
; SSSE3-NEXT: pshufb %xmm4, %xmm1
; SSSE3-NEXT: pshufb %xmm5, %xmm3
[x86,sdag] Two interrelated changes to the x86 and sdag code. First, don't combine bit masking into vector shuffles (even ones the target can handle) once operation legalization has taken place. Custom legalization of vector shuffles may exist for these patterns (making the predicate return true) but that custom legalization may in some cases produce the exact bit math this matches. We only really want to handle this prior to operation legalization. However, the x86 backend, in a fit of awesome, relied on this. What it would do is mark VSELECTs as expand, which would turn them into arithmetic, which this would then match back into vector shuffles, which we would then lower properly. Amazing. Instead, the second change is to teach the x86 backend to directly form vector shuffles from VSELECT nodes with constant conditions, and to mark all of the vector types we support lowering blends as shuffles as custom VSELECT lowering. We still mark the forms which actually support variable blends as *legal* so that the custom lowering is bypassed, and the legal lowering can even be used by the vector shuffle legalization (yes, i know, this is confusing. but that's how the patterns are written). This makes the VSELECT lowering much more sensible, and in fact should fix a bunch of bugs with it. However, as you'll see in the test cases, right now what it does is point out the *hilarious* deficiency of the new vector shuffle lowering when it comes to blends. Fortunately, my very next patch fixes that. I can't submit it yet, because that patch, somewhat obviously, forms the exact and/or pattern that the DAG combine is matching here! Without this patch, teaching the vector shuffle lowering to produce the right code infloops in the DAG combiner. With this patch alone, we produce terrible code but at least lower through the right paths. With both patches, all the regressions here should be fixed, and a bunch of the improvements (like using 2 shufps with no memory loads instead of 2 andps with memory loads and an orps) will stay. Win! There is one other change worth noting here. We had hilariously wrong vectorization cost estimates for vselect because we fell through to the code path that assumed all "expand" vector operations are scalarized. However, the "expand" lowering of VSELECT is vector bit math, most definitely not scalarized. So now we go back to the correct if horribly naive cost of "1" for "not scalarized". If anyone wants to add actual modeling of shuffle costs, that would be cool, but this seems an improvement on its own. Note the removal of 16 and 32 "costs" for doing a blend. Even in SSE2 we can blend in fewer than 16 instructions. ;] Of course, we don't right now because of OMG bad code, but I'm going to fix that. Next patch. I promise. llvm-svn: 229835
2015-02-19 18:36:19 +08:00
; SSSE3-NEXT: por %xmm3, %xmm1
; SSSE3-NEXT: retq
;
; SSE41-LABEL: constant_pblendvb_avx2:
; SSE41: # %bb.0: # %entry
; SSE41-NEXT: movdqa %xmm0, %xmm4
; SSE41-NEXT: movaps {{.*#+}} xmm0 = [255,255,0,255,0,0,0,255,255,255,0,255,0,0,0,255]
; SSE41-NEXT: pblendvb %xmm0, %xmm2, %xmm4
; SSE41-NEXT: pblendvb %xmm0, %xmm3, %xmm1
; SSE41-NEXT: movdqa %xmm4, %xmm0
; SSE41-NEXT: retq
;
; AVX1-LABEL: constant_pblendvb_avx2:
; AVX1: # %bb.0: # %entry
[X86] Move promotion of vector and/or/xor from legalization to DAG combine Summary: I've noticed that the bitcasts we introduce for these make computeKnownBits and computeNumSignBits not work well in LegalizeVectorOps. LegalizeVectorOps legalizes bottom up while LegalizeDAG legalizes top down. The bottom up strategy for LegalizeVectorOps means operands are legalized before their uses. So we promote and/or/xor before we legalize the operands that use them making computeKnownBits/computeNumSignBits in places like LowerTruncate suboptimal. I looked at changing LegalizeVectorOps to be top down as well, but that was more disruptive and caused some regressions. I also looked at just moving promotion of binops to LegalizeDAG, but that had a few issues one around matching AND,ANDN,OR into VSELECT because I had to create ANDN as vXi64, but the other nodes hadn't legalized yet, I didn't look too hard at fixing that. This patch seems to produce better results overall than my other attempts. We now form broadcasts of constants better in some cases. For at least some of them the AND was being introduced in LegalizeDAG, promoted to vXi64, and the BUILD_VECTOR was also legalized there. I think we got bad ordering of that. Now the promotion is out of the legalizer so we handle this better. In the longer term I think we really should evaluate whether we should be doing this promotion at all. It's really there to reduce isel pattern count, but I'm wondering if we'd be better served just eating the pattern cost or doing C++ based isel for vector and/or/xor in X86ISelDAGToDAG. The masked and/or/xor will definitely be difficult in patterns if a bitcast gets between the vselect and the and/or/xor node. That becomes a lot of permutations to cover. Reviewers: RKSimon, spatel Reviewed By: RKSimon Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D53107 llvm-svn: 344487
2018-10-15 09:51:58 +08:00
; AVX1-NEXT: vbroadcastsd {{.*#+}} ymm2 = [-5.4861292804117373E+303,-5.4861292804117373E+303,-5.4861292804117373E+303,-5.4861292804117373E+303]
; AVX1-NEXT: vandnps %ymm0, %ymm2, %ymm0
; AVX1-NEXT: vandps %ymm2, %ymm1, %ymm1
; AVX1-NEXT: vorps %ymm0, %ymm1, %ymm0
; AVX1-NEXT: retq
;
; AVX2-LABEL: constant_pblendvb_avx2:
; AVX2: # %bb.0: # %entry
; AVX2-NEXT: vmovdqa {{.*#+}} ymm2 = [255,255,0,255,0,0,0,255,255,255,0,255,0,0,0,255,255,255,0,255,0,0,0,255,255,255,0,255,0,0,0,255]
; AVX2-NEXT: vpblendvb %ymm2, %ymm1, %ymm0, %ymm0
; AVX2-NEXT: retq
entry:
%select = select <32 x i1> <i1 false, i1 false, i1 true, i1 false, i1 true, i1 true, i1 true, i1 false, i1 false, i1 false, i1 true, i1 false, i1 true, i1 true, i1 true, i1 false, i1 false, i1 false, i1 true, i1 false, i1 true, i1 true, i1 true, i1 false, i1 false, i1 false, i1 true, i1 false, i1 true, i1 true, i1 true, i1 false>, <32 x i8> %xyzw, <32 x i8> %abcd
ret <32 x i8> %select
}
declare <8 x float> @llvm.x86.avx.blendv.ps.256(<8 x float>, <8 x float>, <8 x float>)
declare <4 x double> @llvm.x86.avx.blendv.pd.256(<4 x double>, <4 x double>, <4 x double>)
;; 4 tests for shufflevectors that optimize to blend + immediate
define <4 x float> @blend_shufflevector_4xfloat(<4 x float> %a, <4 x float> %b) {
; SSE2-LABEL: blend_shufflevector_4xfloat:
; SSE2: # %bb.0: # %entry
; SSE2-NEXT: shufps {{.*#+}} xmm0 = xmm0[0,2],xmm1[1,3]
[x86] Enable the new vector shuffle lowering by default. Update the entire regression test suite for the new shuffles. Remove most of the old testing which was devoted to the old shuffle lowering path and is no longer relevant really. Also remove a few other random tests that only really exercised shuffles and only incidently or without any interesting aspects to them. Benchmarking that I have done shows a few small regressions with this on LNT, zero measurable regressions on real, large applications, and for several benchmarks where the loop vectorizer fires in the hot path it shows 5% to 40% improvements for SSE2 and SSE3 code running on Sandy Bridge machines. Running on AMD machines shows even more dramatic improvements. When using newer ISA vector extensions the gains are much more modest, but the code is still better on the whole. There are a few regressions being tracked (PR21137, PR21138, PR21139) but by and large this is expected to be a win for x86 generated code performance. It is also more correct than the code it replaces. I have fuzz tested this extensively with ISA extensions up through AVX2 and found no crashes or miscompiles (yet...). The old lowering had a few miscompiles and crashers after a somewhat smaller amount of fuzz testing. There is one significant area where the new code path lags behind and that is in AVX-512 support. However, there was *extremely little* support for that already and so this isn't a significant step backwards and the new framework will probably make it easier to implement lowering that uses the full power of AVX-512's table-based shuffle+blend (IMO). Many thanks to Quentin, Andrea, Robert, and others for benchmarking assistance. Thanks to Adam and others for help with AVX-512. Thanks to Hal, Eric, and *many* others for answering my incessant questions about how the backend actually works. =] I will leave the old code path in the tree until the 3 PRs above are at least resolved to folks' satisfaction. Then I will rip it (and 1000s of lines of code) out. =] I don't expect this flag to stay around for very long. It may not survive next week. llvm-svn: 219046
2014-10-04 11:52:55 +08:00
; SSE2-NEXT: shufps {{.*#+}} xmm0 = xmm0[0,2,1,3]
; SSE2-NEXT: retq
;
; SSSE3-LABEL: blend_shufflevector_4xfloat:
; SSSE3: # %bb.0: # %entry
; SSSE3-NEXT: shufps {{.*#+}} xmm0 = xmm0[0,2],xmm1[1,3]
[x86] Enable the new vector shuffle lowering by default. Update the entire regression test suite for the new shuffles. Remove most of the old testing which was devoted to the old shuffle lowering path and is no longer relevant really. Also remove a few other random tests that only really exercised shuffles and only incidently or without any interesting aspects to them. Benchmarking that I have done shows a few small regressions with this on LNT, zero measurable regressions on real, large applications, and for several benchmarks where the loop vectorizer fires in the hot path it shows 5% to 40% improvements for SSE2 and SSE3 code running on Sandy Bridge machines. Running on AMD machines shows even more dramatic improvements. When using newer ISA vector extensions the gains are much more modest, but the code is still better on the whole. There are a few regressions being tracked (PR21137, PR21138, PR21139) but by and large this is expected to be a win for x86 generated code performance. It is also more correct than the code it replaces. I have fuzz tested this extensively with ISA extensions up through AVX2 and found no crashes or miscompiles (yet...). The old lowering had a few miscompiles and crashers after a somewhat smaller amount of fuzz testing. There is one significant area where the new code path lags behind and that is in AVX-512 support. However, there was *extremely little* support for that already and so this isn't a significant step backwards and the new framework will probably make it easier to implement lowering that uses the full power of AVX-512's table-based shuffle+blend (IMO). Many thanks to Quentin, Andrea, Robert, and others for benchmarking assistance. Thanks to Adam and others for help with AVX-512. Thanks to Hal, Eric, and *many* others for answering my incessant questions about how the backend actually works. =] I will leave the old code path in the tree until the 3 PRs above are at least resolved to folks' satisfaction. Then I will rip it (and 1000s of lines of code) out. =] I don't expect this flag to stay around for very long. It may not survive next week. llvm-svn: 219046
2014-10-04 11:52:55 +08:00
; SSSE3-NEXT: shufps {{.*#+}} xmm0 = xmm0[0,2,1,3]
; SSSE3-NEXT: retq
;
; SSE41-LABEL: blend_shufflevector_4xfloat:
; SSE41: # %bb.0: # %entry
; SSE41-NEXT: blendps {{.*#+}} xmm0 = xmm0[0],xmm1[1],xmm0[2],xmm1[3]
; SSE41-NEXT: retq
;
; AVX-LABEL: blend_shufflevector_4xfloat:
; AVX: # %bb.0: # %entry
; AVX-NEXT: vblendps {{.*#+}} xmm0 = xmm0[0],xmm1[1],xmm0[2],xmm1[3]
; AVX-NEXT: retq
entry:
%select = shufflevector <4 x float> %a, <4 x float> %b, <4 x i32> <i32 0, i32 5, i32 2, i32 7>
ret <4 x float> %select
}
define <8 x float> @blend_shufflevector_8xfloat(<8 x float> %a, <8 x float> %b) {
; SSE2-LABEL: blend_shufflevector_8xfloat:
; SSE2: # %bb.0: # %entry
; SSE2-NEXT: movss {{.*#+}} xmm2 = xmm0[0],xmm2[1,2,3]
; SSE2-NEXT: shufps {{.*#+}} xmm1 = xmm1[2,0],xmm3[3,0]
; SSE2-NEXT: shufps {{.*#+}} xmm3 = xmm3[0,1],xmm1[0,2]
; SSE2-NEXT: movaps %xmm2, %xmm0
; SSE2-NEXT: movaps %xmm3, %xmm1
; SSE2-NEXT: retq
;
; SSSE3-LABEL: blend_shufflevector_8xfloat:
; SSSE3: # %bb.0: # %entry
; SSSE3-NEXT: movss {{.*#+}} xmm2 = xmm0[0],xmm2[1,2,3]
; SSSE3-NEXT: shufps {{.*#+}} xmm1 = xmm1[2,0],xmm3[3,0]
; SSSE3-NEXT: shufps {{.*#+}} xmm3 = xmm3[0,1],xmm1[0,2]
; SSSE3-NEXT: movaps %xmm2, %xmm0
; SSSE3-NEXT: movaps %xmm3, %xmm1
; SSSE3-NEXT: retq
;
; SSE41-LABEL: blend_shufflevector_8xfloat:
; SSE41: # %bb.0: # %entry
; SSE41-NEXT: blendps {{.*#+}} xmm0 = xmm0[0],xmm2[1,2,3]
; SSE41-NEXT: blendps {{.*#+}} xmm1 = xmm3[0,1],xmm1[2],xmm3[3]
; SSE41-NEXT: retq
;
; AVX-LABEL: blend_shufflevector_8xfloat:
; AVX: # %bb.0: # %entry
; AVX-NEXT: vblendps {{.*#+}} ymm0 = ymm0[0],ymm1[1,2,3,4,5],ymm0[6],ymm1[7]
; AVX-NEXT: retq
entry:
%select = shufflevector <8 x float> %a, <8 x float> %b, <8 x i32> <i32 0, i32 9, i32 10, i32 11, i32 12, i32 13, i32 6, i32 15>
ret <8 x float> %select
}
define <4 x double> @blend_shufflevector_4xdouble(<4 x double> %a, <4 x double> %b) {
[x86] Enable the new vector shuffle lowering by default. Update the entire regression test suite for the new shuffles. Remove most of the old testing which was devoted to the old shuffle lowering path and is no longer relevant really. Also remove a few other random tests that only really exercised shuffles and only incidently or without any interesting aspects to them. Benchmarking that I have done shows a few small regressions with this on LNT, zero measurable regressions on real, large applications, and for several benchmarks where the loop vectorizer fires in the hot path it shows 5% to 40% improvements for SSE2 and SSE3 code running on Sandy Bridge machines. Running on AMD machines shows even more dramatic improvements. When using newer ISA vector extensions the gains are much more modest, but the code is still better on the whole. There are a few regressions being tracked (PR21137, PR21138, PR21139) but by and large this is expected to be a win for x86 generated code performance. It is also more correct than the code it replaces. I have fuzz tested this extensively with ISA extensions up through AVX2 and found no crashes or miscompiles (yet...). The old lowering had a few miscompiles and crashers after a somewhat smaller amount of fuzz testing. There is one significant area where the new code path lags behind and that is in AVX-512 support. However, there was *extremely little* support for that already and so this isn't a significant step backwards and the new framework will probably make it easier to implement lowering that uses the full power of AVX-512's table-based shuffle+blend (IMO). Many thanks to Quentin, Andrea, Robert, and others for benchmarking assistance. Thanks to Adam and others for help with AVX-512. Thanks to Hal, Eric, and *many* others for answering my incessant questions about how the backend actually works. =] I will leave the old code path in the tree until the 3 PRs above are at least resolved to folks' satisfaction. Then I will rip it (and 1000s of lines of code) out. =] I don't expect this flag to stay around for very long. It may not survive next week. llvm-svn: 219046
2014-10-04 11:52:55 +08:00
; SSE2-LABEL: blend_shufflevector_4xdouble:
; SSE2: # %bb.0: # %entry
; SSE2-NEXT: shufps {{.*#+}} xmm0 = xmm0[0,1],xmm2[2,3]
[x86] Enable the new vector shuffle lowering by default. Update the entire regression test suite for the new shuffles. Remove most of the old testing which was devoted to the old shuffle lowering path and is no longer relevant really. Also remove a few other random tests that only really exercised shuffles and only incidently or without any interesting aspects to them. Benchmarking that I have done shows a few small regressions with this on LNT, zero measurable regressions on real, large applications, and for several benchmarks where the loop vectorizer fires in the hot path it shows 5% to 40% improvements for SSE2 and SSE3 code running on Sandy Bridge machines. Running on AMD machines shows even more dramatic improvements. When using newer ISA vector extensions the gains are much more modest, but the code is still better on the whole. There are a few regressions being tracked (PR21137, PR21138, PR21139) but by and large this is expected to be a win for x86 generated code performance. It is also more correct than the code it replaces. I have fuzz tested this extensively with ISA extensions up through AVX2 and found no crashes or miscompiles (yet...). The old lowering had a few miscompiles and crashers after a somewhat smaller amount of fuzz testing. There is one significant area where the new code path lags behind and that is in AVX-512 support. However, there was *extremely little* support for that already and so this isn't a significant step backwards and the new framework will probably make it easier to implement lowering that uses the full power of AVX-512's table-based shuffle+blend (IMO). Many thanks to Quentin, Andrea, Robert, and others for benchmarking assistance. Thanks to Adam and others for help with AVX-512. Thanks to Hal, Eric, and *many* others for answering my incessant questions about how the backend actually works. =] I will leave the old code path in the tree until the 3 PRs above are at least resolved to folks' satisfaction. Then I will rip it (and 1000s of lines of code) out. =] I don't expect this flag to stay around for very long. It may not survive next week. llvm-svn: 219046
2014-10-04 11:52:55 +08:00
; SSE2-NEXT: retq
;
; SSSE3-LABEL: blend_shufflevector_4xdouble:
; SSSE3: # %bb.0: # %entry
; SSSE3-NEXT: shufps {{.*#+}} xmm0 = xmm0[0,1],xmm2[2,3]
[x86] Enable the new vector shuffle lowering by default. Update the entire regression test suite for the new shuffles. Remove most of the old testing which was devoted to the old shuffle lowering path and is no longer relevant really. Also remove a few other random tests that only really exercised shuffles and only incidently or without any interesting aspects to them. Benchmarking that I have done shows a few small regressions with this on LNT, zero measurable regressions on real, large applications, and for several benchmarks where the loop vectorizer fires in the hot path it shows 5% to 40% improvements for SSE2 and SSE3 code running on Sandy Bridge machines. Running on AMD machines shows even more dramatic improvements. When using newer ISA vector extensions the gains are much more modest, but the code is still better on the whole. There are a few regressions being tracked (PR21137, PR21138, PR21139) but by and large this is expected to be a win for x86 generated code performance. It is also more correct than the code it replaces. I have fuzz tested this extensively with ISA extensions up through AVX2 and found no crashes or miscompiles (yet...). The old lowering had a few miscompiles and crashers after a somewhat smaller amount of fuzz testing. There is one significant area where the new code path lags behind and that is in AVX-512 support. However, there was *extremely little* support for that already and so this isn't a significant step backwards and the new framework will probably make it easier to implement lowering that uses the full power of AVX-512's table-based shuffle+blend (IMO). Many thanks to Quentin, Andrea, Robert, and others for benchmarking assistance. Thanks to Adam and others for help with AVX-512. Thanks to Hal, Eric, and *many* others for answering my incessant questions about how the backend actually works. =] I will leave the old code path in the tree until the 3 PRs above are at least resolved to folks' satisfaction. Then I will rip it (and 1000s of lines of code) out. =] I don't expect this flag to stay around for very long. It may not survive next week. llvm-svn: 219046
2014-10-04 11:52:55 +08:00
; SSSE3-NEXT: retq
;
; SSE41-LABEL: blend_shufflevector_4xdouble:
; SSE41: # %bb.0: # %entry
; SSE41-NEXT: blendps {{.*#+}} xmm0 = xmm0[0,1],xmm2[2,3]
[x86] Enable the new vector shuffle lowering by default. Update the entire regression test suite for the new shuffles. Remove most of the old testing which was devoted to the old shuffle lowering path and is no longer relevant really. Also remove a few other random tests that only really exercised shuffles and only incidently or without any interesting aspects to them. Benchmarking that I have done shows a few small regressions with this on LNT, zero measurable regressions on real, large applications, and for several benchmarks where the loop vectorizer fires in the hot path it shows 5% to 40% improvements for SSE2 and SSE3 code running on Sandy Bridge machines. Running on AMD machines shows even more dramatic improvements. When using newer ISA vector extensions the gains are much more modest, but the code is still better on the whole. There are a few regressions being tracked (PR21137, PR21138, PR21139) but by and large this is expected to be a win for x86 generated code performance. It is also more correct than the code it replaces. I have fuzz tested this extensively with ISA extensions up through AVX2 and found no crashes or miscompiles (yet...). The old lowering had a few miscompiles and crashers after a somewhat smaller amount of fuzz testing. There is one significant area where the new code path lags behind and that is in AVX-512 support. However, there was *extremely little* support for that already and so this isn't a significant step backwards and the new framework will probably make it easier to implement lowering that uses the full power of AVX-512's table-based shuffle+blend (IMO). Many thanks to Quentin, Andrea, Robert, and others for benchmarking assistance. Thanks to Adam and others for help with AVX-512. Thanks to Hal, Eric, and *many* others for answering my incessant questions about how the backend actually works. =] I will leave the old code path in the tree until the 3 PRs above are at least resolved to folks' satisfaction. Then I will rip it (and 1000s of lines of code) out. =] I don't expect this flag to stay around for very long. It may not survive next week. llvm-svn: 219046
2014-10-04 11:52:55 +08:00
; SSE41-NEXT: retq
;
; AVX-LABEL: blend_shufflevector_4xdouble:
; AVX: # %bb.0: # %entry
; AVX-NEXT: vblendps {{.*#+}} ymm0 = ymm0[0,1],ymm1[2,3],ymm0[4,5,6,7]
; AVX-NEXT: retq
entry:
%select = shufflevector <4 x double> %a, <4 x double> %b, <4 x i32> <i32 0, i32 5, i32 2, i32 3>
ret <4 x double> %select
}
define <4 x i64> @blend_shufflevector_4xi64(<4 x i64> %a, <4 x i64> %b) {
[x86] Enable the new vector shuffle lowering by default. Update the entire regression test suite for the new shuffles. Remove most of the old testing which was devoted to the old shuffle lowering path and is no longer relevant really. Also remove a few other random tests that only really exercised shuffles and only incidently or without any interesting aspects to them. Benchmarking that I have done shows a few small regressions with this on LNT, zero measurable regressions on real, large applications, and for several benchmarks where the loop vectorizer fires in the hot path it shows 5% to 40% improvements for SSE2 and SSE3 code running on Sandy Bridge machines. Running on AMD machines shows even more dramatic improvements. When using newer ISA vector extensions the gains are much more modest, but the code is still better on the whole. There are a few regressions being tracked (PR21137, PR21138, PR21139) but by and large this is expected to be a win for x86 generated code performance. It is also more correct than the code it replaces. I have fuzz tested this extensively with ISA extensions up through AVX2 and found no crashes or miscompiles (yet...). The old lowering had a few miscompiles and crashers after a somewhat smaller amount of fuzz testing. There is one significant area where the new code path lags behind and that is in AVX-512 support. However, there was *extremely little* support for that already and so this isn't a significant step backwards and the new framework will probably make it easier to implement lowering that uses the full power of AVX-512's table-based shuffle+blend (IMO). Many thanks to Quentin, Andrea, Robert, and others for benchmarking assistance. Thanks to Adam and others for help with AVX-512. Thanks to Hal, Eric, and *many* others for answering my incessant questions about how the backend actually works. =] I will leave the old code path in the tree until the 3 PRs above are at least resolved to folks' satisfaction. Then I will rip it (and 1000s of lines of code) out. =] I don't expect this flag to stay around for very long. It may not survive next week. llvm-svn: 219046
2014-10-04 11:52:55 +08:00
; SSE2-LABEL: blend_shufflevector_4xi64:
; SSE2: # %bb.0: # %entry
[x86] Enable the new vector shuffle lowering by default. Update the entire regression test suite for the new shuffles. Remove most of the old testing which was devoted to the old shuffle lowering path and is no longer relevant really. Also remove a few other random tests that only really exercised shuffles and only incidently or without any interesting aspects to them. Benchmarking that I have done shows a few small regressions with this on LNT, zero measurable regressions on real, large applications, and for several benchmarks where the loop vectorizer fires in the hot path it shows 5% to 40% improvements for SSE2 and SSE3 code running on Sandy Bridge machines. Running on AMD machines shows even more dramatic improvements. When using newer ISA vector extensions the gains are much more modest, but the code is still better on the whole. There are a few regressions being tracked (PR21137, PR21138, PR21139) but by and large this is expected to be a win for x86 generated code performance. It is also more correct than the code it replaces. I have fuzz tested this extensively with ISA extensions up through AVX2 and found no crashes or miscompiles (yet...). The old lowering had a few miscompiles and crashers after a somewhat smaller amount of fuzz testing. There is one significant area where the new code path lags behind and that is in AVX-512 support. However, there was *extremely little* support for that already and so this isn't a significant step backwards and the new framework will probably make it easier to implement lowering that uses the full power of AVX-512's table-based shuffle+blend (IMO). Many thanks to Quentin, Andrea, Robert, and others for benchmarking assistance. Thanks to Adam and others for help with AVX-512. Thanks to Hal, Eric, and *many* others for answering my incessant questions about how the backend actually works. =] I will leave the old code path in the tree until the 3 PRs above are at least resolved to folks' satisfaction. Then I will rip it (and 1000s of lines of code) out. =] I don't expect this flag to stay around for very long. It may not survive next week. llvm-svn: 219046
2014-10-04 11:52:55 +08:00
; SSE2-NEXT: movaps %xmm3, %xmm1
; SSE2-NEXT: movsd {{.*#+}} xmm0 = xmm2[0],xmm0[1]
[x86] Enable the new vector shuffle lowering by default. Update the entire regression test suite for the new shuffles. Remove most of the old testing which was devoted to the old shuffle lowering path and is no longer relevant really. Also remove a few other random tests that only really exercised shuffles and only incidently or without any interesting aspects to them. Benchmarking that I have done shows a few small regressions with this on LNT, zero measurable regressions on real, large applications, and for several benchmarks where the loop vectorizer fires in the hot path it shows 5% to 40% improvements for SSE2 and SSE3 code running on Sandy Bridge machines. Running on AMD machines shows even more dramatic improvements. When using newer ISA vector extensions the gains are much more modest, but the code is still better on the whole. There are a few regressions being tracked (PR21137, PR21138, PR21139) but by and large this is expected to be a win for x86 generated code performance. It is also more correct than the code it replaces. I have fuzz tested this extensively with ISA extensions up through AVX2 and found no crashes or miscompiles (yet...). The old lowering had a few miscompiles and crashers after a somewhat smaller amount of fuzz testing. There is one significant area where the new code path lags behind and that is in AVX-512 support. However, there was *extremely little* support for that already and so this isn't a significant step backwards and the new framework will probably make it easier to implement lowering that uses the full power of AVX-512's table-based shuffle+blend (IMO). Many thanks to Quentin, Andrea, Robert, and others for benchmarking assistance. Thanks to Adam and others for help with AVX-512. Thanks to Hal, Eric, and *many* others for answering my incessant questions about how the backend actually works. =] I will leave the old code path in the tree until the 3 PRs above are at least resolved to folks' satisfaction. Then I will rip it (and 1000s of lines of code) out. =] I don't expect this flag to stay around for very long. It may not survive next week. llvm-svn: 219046
2014-10-04 11:52:55 +08:00
; SSE2-NEXT: retq
;
[x86] Enable the new vector shuffle lowering by default. Update the entire regression test suite for the new shuffles. Remove most of the old testing which was devoted to the old shuffle lowering path and is no longer relevant really. Also remove a few other random tests that only really exercised shuffles and only incidently or without any interesting aspects to them. Benchmarking that I have done shows a few small regressions with this on LNT, zero measurable regressions on real, large applications, and for several benchmarks where the loop vectorizer fires in the hot path it shows 5% to 40% improvements for SSE2 and SSE3 code running on Sandy Bridge machines. Running on AMD machines shows even more dramatic improvements. When using newer ISA vector extensions the gains are much more modest, but the code is still better on the whole. There are a few regressions being tracked (PR21137, PR21138, PR21139) but by and large this is expected to be a win for x86 generated code performance. It is also more correct than the code it replaces. I have fuzz tested this extensively with ISA extensions up through AVX2 and found no crashes or miscompiles (yet...). The old lowering had a few miscompiles and crashers after a somewhat smaller amount of fuzz testing. There is one significant area where the new code path lags behind and that is in AVX-512 support. However, there was *extremely little* support for that already and so this isn't a significant step backwards and the new framework will probably make it easier to implement lowering that uses the full power of AVX-512's table-based shuffle+blend (IMO). Many thanks to Quentin, Andrea, Robert, and others for benchmarking assistance. Thanks to Adam and others for help with AVX-512. Thanks to Hal, Eric, and *many* others for answering my incessant questions about how the backend actually works. =] I will leave the old code path in the tree until the 3 PRs above are at least resolved to folks' satisfaction. Then I will rip it (and 1000s of lines of code) out. =] I don't expect this flag to stay around for very long. It may not survive next week. llvm-svn: 219046
2014-10-04 11:52:55 +08:00
; SSSE3-LABEL: blend_shufflevector_4xi64:
; SSSE3: # %bb.0: # %entry
[x86] Enable the new vector shuffle lowering by default. Update the entire regression test suite for the new shuffles. Remove most of the old testing which was devoted to the old shuffle lowering path and is no longer relevant really. Also remove a few other random tests that only really exercised shuffles and only incidently or without any interesting aspects to them. Benchmarking that I have done shows a few small regressions with this on LNT, zero measurable regressions on real, large applications, and for several benchmarks where the loop vectorizer fires in the hot path it shows 5% to 40% improvements for SSE2 and SSE3 code running on Sandy Bridge machines. Running on AMD machines shows even more dramatic improvements. When using newer ISA vector extensions the gains are much more modest, but the code is still better on the whole. There are a few regressions being tracked (PR21137, PR21138, PR21139) but by and large this is expected to be a win for x86 generated code performance. It is also more correct than the code it replaces. I have fuzz tested this extensively with ISA extensions up through AVX2 and found no crashes or miscompiles (yet...). The old lowering had a few miscompiles and crashers after a somewhat smaller amount of fuzz testing. There is one significant area where the new code path lags behind and that is in AVX-512 support. However, there was *extremely little* support for that already and so this isn't a significant step backwards and the new framework will probably make it easier to implement lowering that uses the full power of AVX-512's table-based shuffle+blend (IMO). Many thanks to Quentin, Andrea, Robert, and others for benchmarking assistance. Thanks to Adam and others for help with AVX-512. Thanks to Hal, Eric, and *many* others for answering my incessant questions about how the backend actually works. =] I will leave the old code path in the tree until the 3 PRs above are at least resolved to folks' satisfaction. Then I will rip it (and 1000s of lines of code) out. =] I don't expect this flag to stay around for very long. It may not survive next week. llvm-svn: 219046
2014-10-04 11:52:55 +08:00
; SSSE3-NEXT: movaps %xmm3, %xmm1
; SSSE3-NEXT: movsd {{.*#+}} xmm0 = xmm2[0],xmm0[1]
[x86] Enable the new vector shuffle lowering by default. Update the entire regression test suite for the new shuffles. Remove most of the old testing which was devoted to the old shuffle lowering path and is no longer relevant really. Also remove a few other random tests that only really exercised shuffles and only incidently or without any interesting aspects to them. Benchmarking that I have done shows a few small regressions with this on LNT, zero measurable regressions on real, large applications, and for several benchmarks where the loop vectorizer fires in the hot path it shows 5% to 40% improvements for SSE2 and SSE3 code running on Sandy Bridge machines. Running on AMD machines shows even more dramatic improvements. When using newer ISA vector extensions the gains are much more modest, but the code is still better on the whole. There are a few regressions being tracked (PR21137, PR21138, PR21139) but by and large this is expected to be a win for x86 generated code performance. It is also more correct than the code it replaces. I have fuzz tested this extensively with ISA extensions up through AVX2 and found no crashes or miscompiles (yet...). The old lowering had a few miscompiles and crashers after a somewhat smaller amount of fuzz testing. There is one significant area where the new code path lags behind and that is in AVX-512 support. However, there was *extremely little* support for that already and so this isn't a significant step backwards and the new framework will probably make it easier to implement lowering that uses the full power of AVX-512's table-based shuffle+blend (IMO). Many thanks to Quentin, Andrea, Robert, and others for benchmarking assistance. Thanks to Adam and others for help with AVX-512. Thanks to Hal, Eric, and *many* others for answering my incessant questions about how the backend actually works. =] I will leave the old code path in the tree until the 3 PRs above are at least resolved to folks' satisfaction. Then I will rip it (and 1000s of lines of code) out. =] I don't expect this flag to stay around for very long. It may not survive next week. llvm-svn: 219046
2014-10-04 11:52:55 +08:00
; SSSE3-NEXT: retq
;
; SSE41-LABEL: blend_shufflevector_4xi64:
; SSE41: # %bb.0: # %entry
[x86] Enable the new vector shuffle lowering by default. Update the entire regression test suite for the new shuffles. Remove most of the old testing which was devoted to the old shuffle lowering path and is no longer relevant really. Also remove a few other random tests that only really exercised shuffles and only incidently or without any interesting aspects to them. Benchmarking that I have done shows a few small regressions with this on LNT, zero measurable regressions on real, large applications, and for several benchmarks where the loop vectorizer fires in the hot path it shows 5% to 40% improvements for SSE2 and SSE3 code running on Sandy Bridge machines. Running on AMD machines shows even more dramatic improvements. When using newer ISA vector extensions the gains are much more modest, but the code is still better on the whole. There are a few regressions being tracked (PR21137, PR21138, PR21139) but by and large this is expected to be a win for x86 generated code performance. It is also more correct than the code it replaces. I have fuzz tested this extensively with ISA extensions up through AVX2 and found no crashes or miscompiles (yet...). The old lowering had a few miscompiles and crashers after a somewhat smaller amount of fuzz testing. There is one significant area where the new code path lags behind and that is in AVX-512 support. However, there was *extremely little* support for that already and so this isn't a significant step backwards and the new framework will probably make it easier to implement lowering that uses the full power of AVX-512's table-based shuffle+blend (IMO). Many thanks to Quentin, Andrea, Robert, and others for benchmarking assistance. Thanks to Adam and others for help with AVX-512. Thanks to Hal, Eric, and *many* others for answering my incessant questions about how the backend actually works. =] I will leave the old code path in the tree until the 3 PRs above are at least resolved to folks' satisfaction. Then I will rip it (and 1000s of lines of code) out. =] I don't expect this flag to stay around for very long. It may not survive next week. llvm-svn: 219046
2014-10-04 11:52:55 +08:00
; SSE41-NEXT: movaps %xmm3, %xmm1
; SSE41-NEXT: blendps {{.*#+}} xmm0 = xmm2[0,1],xmm0[2,3]
[x86] Enable the new vector shuffle lowering by default. Update the entire regression test suite for the new shuffles. Remove most of the old testing which was devoted to the old shuffle lowering path and is no longer relevant really. Also remove a few other random tests that only really exercised shuffles and only incidently or without any interesting aspects to them. Benchmarking that I have done shows a few small regressions with this on LNT, zero measurable regressions on real, large applications, and for several benchmarks where the loop vectorizer fires in the hot path it shows 5% to 40% improvements for SSE2 and SSE3 code running on Sandy Bridge machines. Running on AMD machines shows even more dramatic improvements. When using newer ISA vector extensions the gains are much more modest, but the code is still better on the whole. There are a few regressions being tracked (PR21137, PR21138, PR21139) but by and large this is expected to be a win for x86 generated code performance. It is also more correct than the code it replaces. I have fuzz tested this extensively with ISA extensions up through AVX2 and found no crashes or miscompiles (yet...). The old lowering had a few miscompiles and crashers after a somewhat smaller amount of fuzz testing. There is one significant area where the new code path lags behind and that is in AVX-512 support. However, there was *extremely little* support for that already and so this isn't a significant step backwards and the new framework will probably make it easier to implement lowering that uses the full power of AVX-512's table-based shuffle+blend (IMO). Many thanks to Quentin, Andrea, Robert, and others for benchmarking assistance. Thanks to Adam and others for help with AVX-512. Thanks to Hal, Eric, and *many* others for answering my incessant questions about how the backend actually works. =] I will leave the old code path in the tree until the 3 PRs above are at least resolved to folks' satisfaction. Then I will rip it (and 1000s of lines of code) out. =] I don't expect this flag to stay around for very long. It may not survive next week. llvm-svn: 219046
2014-10-04 11:52:55 +08:00
; SSE41-NEXT: retq
;
; AVX-LABEL: blend_shufflevector_4xi64:
; AVX: # %bb.0: # %entry
; AVX-NEXT: vblendps {{.*#+}} ymm0 = ymm1[0,1],ymm0[2,3],ymm1[4,5,6,7]
; AVX-NEXT: retq
entry:
%select = shufflevector <4 x i64> %a, <4 x i64> %b, <4 x i32> <i32 4, i32 1, i32 6, i32 7>
ret <4 x i64> %select
}
define <4 x i32> @blend_logic_v4i32(<4 x i32> %b, <4 x i32> %a, <4 x i32> %c) {
; SSE2-LABEL: blend_logic_v4i32:
; SSE2: # %bb.0: # %entry
; SSE2-NEXT: psrad $31, %xmm0
; SSE2-NEXT: pand %xmm0, %xmm1
; SSE2-NEXT: pandn %xmm2, %xmm0
; SSE2-NEXT: por %xmm1, %xmm0
; SSE2-NEXT: retq
;
; SSSE3-LABEL: blend_logic_v4i32:
; SSSE3: # %bb.0: # %entry
; SSSE3-NEXT: psrad $31, %xmm0
; SSSE3-NEXT: pand %xmm0, %xmm1
; SSSE3-NEXT: pandn %xmm2, %xmm0
; SSSE3-NEXT: por %xmm1, %xmm0
; SSSE3-NEXT: retq
;
; SSE41-LABEL: blend_logic_v4i32:
; SSE41: # %bb.0: # %entry
; SSE41-NEXT: psrad $31, %xmm0
; SSE41-NEXT: pblendvb %xmm0, %xmm1, %xmm2
; SSE41-NEXT: movdqa %xmm2, %xmm0
; SSE41-NEXT: retq
;
; AVX-LABEL: blend_logic_v4i32:
; AVX: # %bb.0: # %entry
; AVX-NEXT: vpsrad $31, %xmm0, %xmm0
; AVX-NEXT: vpblendvb %xmm0, %xmm1, %xmm2, %xmm0
; AVX-NEXT: retq
entry:
%b.lobit = ashr <4 x i32> %b, <i32 31, i32 31, i32 31, i32 31>
%sub = sub nsw <4 x i32> zeroinitializer, %a
%0 = xor <4 x i32> %b.lobit, <i32 -1, i32 -1, i32 -1, i32 -1>
%1 = and <4 x i32> %c, %0
%2 = and <4 x i32> %a, %b.lobit
%cond = or <4 x i32> %1, %2
ret <4 x i32> %cond
}
define <8 x i32> @blend_logic_v8i32(<8 x i32> %b, <8 x i32> %a, <8 x i32> %c) {
; SSE2-LABEL: blend_logic_v8i32:
; SSE2: # %bb.0: # %entry
; SSE2-NEXT: psrad $31, %xmm0
; SSE2-NEXT: psrad $31, %xmm1
; SSE2-NEXT: pand %xmm1, %xmm3
; SSE2-NEXT: pandn %xmm5, %xmm1
; SSE2-NEXT: por %xmm3, %xmm1
; SSE2-NEXT: pand %xmm0, %xmm2
; SSE2-NEXT: pandn %xmm4, %xmm0
; SSE2-NEXT: por %xmm2, %xmm0
; SSE2-NEXT: retq
;
; SSSE3-LABEL: blend_logic_v8i32:
; SSSE3: # %bb.0: # %entry
; SSSE3-NEXT: psrad $31, %xmm0
; SSSE3-NEXT: psrad $31, %xmm1
; SSSE3-NEXT: pand %xmm1, %xmm3
; SSSE3-NEXT: pandn %xmm5, %xmm1
; SSSE3-NEXT: por %xmm3, %xmm1
; SSSE3-NEXT: pand %xmm0, %xmm2
; SSSE3-NEXT: pandn %xmm4, %xmm0
; SSSE3-NEXT: por %xmm2, %xmm0
; SSSE3-NEXT: retq
;
; SSE41-LABEL: blend_logic_v8i32:
; SSE41: # %bb.0: # %entry
; SSE41-NEXT: psrad $31, %xmm1
; SSE41-NEXT: psrad $31, %xmm0
; SSE41-NEXT: pblendvb %xmm0, %xmm2, %xmm4
; SSE41-NEXT: movdqa %xmm1, %xmm0
; SSE41-NEXT: pblendvb %xmm0, %xmm3, %xmm5
; SSE41-NEXT: movdqa %xmm4, %xmm0
; SSE41-NEXT: movdqa %xmm5, %xmm1
; SSE41-NEXT: retq
;
; AVX1-LABEL: blend_logic_v8i32:
; AVX1: # %bb.0: # %entry
; AVX1-NEXT: vpsrad $31, %xmm0, %xmm3
; AVX1-NEXT: vextractf128 $1, %ymm0, %xmm0
; AVX1-NEXT: vpsrad $31, %xmm0, %xmm0
; AVX1-NEXT: vinsertf128 $1, %xmm0, %ymm3, %ymm0
; AVX1-NEXT: vandnps %ymm2, %ymm0, %ymm2
; AVX1-NEXT: vandps %ymm0, %ymm1, %ymm0
; AVX1-NEXT: vorps %ymm0, %ymm2, %ymm0
; AVX1-NEXT: retq
;
; AVX2-LABEL: blend_logic_v8i32:
; AVX2: # %bb.0: # %entry
; AVX2-NEXT: vpsrad $31, %ymm0, %ymm0
; AVX2-NEXT: vpblendvb %ymm0, %ymm1, %ymm2, %ymm0
; AVX2-NEXT: retq
entry:
%b.lobit = ashr <8 x i32> %b, <i32 31, i32 31, i32 31, i32 31, i32 31, i32 31, i32 31, i32 31>
%sub = sub nsw <8 x i32> zeroinitializer, %a
%0 = xor <8 x i32> %b.lobit, <i32 -1, i32 -1, i32 -1, i32 -1, i32 -1, i32 -1, i32 -1, i32 -1>
%1 = and <8 x i32> %c, %0
%2 = and <8 x i32> %a, %b.lobit
%cond = or <8 x i32> %1, %2
ret <8 x i32> %cond
}
define <4 x i32> @blend_neg_logic_v4i32(<4 x i32> %a, <4 x i32> %b) {
; SSE-LABEL: blend_neg_logic_v4i32:
; SSE: # %bb.0: # %entry
; SSE-NEXT: psrad $31, %xmm1
; SSE-NEXT: pxor %xmm1, %xmm0
; SSE-NEXT: psubd %xmm1, %xmm0
; SSE-NEXT: retq
;
; AVX-LABEL: blend_neg_logic_v4i32:
; AVX: # %bb.0: # %entry
; AVX-NEXT: vpsrad $31, %xmm1, %xmm1
; AVX-NEXT: vpxor %xmm1, %xmm0, %xmm0
; AVX-NEXT: vpsubd %xmm1, %xmm0, %xmm0
; AVX-NEXT: retq
entry:
%b.lobit = ashr <4 x i32> %b, <i32 31, i32 31, i32 31, i32 31>
%sub = sub nsw <4 x i32> zeroinitializer, %a
%0 = xor <4 x i32> %b.lobit, <i32 -1, i32 -1, i32 -1, i32 -1>
%1 = and <4 x i32> %a, %0
%2 = and <4 x i32> %b.lobit, %sub
%cond = or <4 x i32> %1, %2
ret <4 x i32> %cond
}
define <8 x i32> @blend_neg_logic_v8i32(<8 x i32> %a, <8 x i32> %b) {
; SSE-LABEL: blend_neg_logic_v8i32:
; SSE: # %bb.0: # %entry
; SSE-NEXT: psrad $31, %xmm3
; SSE-NEXT: psrad $31, %xmm2
; SSE-NEXT: pxor %xmm2, %xmm0
; SSE-NEXT: psubd %xmm2, %xmm0
; SSE-NEXT: pxor %xmm3, %xmm1
; SSE-NEXT: psubd %xmm3, %xmm1
; SSE-NEXT: retq
;
; AVX1-LABEL: blend_neg_logic_v8i32:
; AVX1: # %bb.0: # %entry
; AVX1-NEXT: vpsrad $31, %xmm1, %xmm2
; AVX1-NEXT: vextractf128 $1, %ymm1, %xmm1
; AVX1-NEXT: vpsrad $31, %xmm1, %xmm1
; AVX1-NEXT: vinsertf128 $1, %xmm1, %ymm2, %ymm1
; AVX1-NEXT: vextractf128 $1, %ymm0, %xmm2
; AVX1-NEXT: vpxor %xmm3, %xmm3, %xmm3
; AVX1-NEXT: vpsubd %xmm2, %xmm3, %xmm2
; AVX1-NEXT: vpsubd %xmm0, %xmm3, %xmm3
; AVX1-NEXT: vinsertf128 $1, %xmm2, %ymm3, %ymm2
; AVX1-NEXT: vandnps %ymm0, %ymm1, %ymm0
; AVX1-NEXT: vandps %ymm2, %ymm1, %ymm1
; AVX1-NEXT: vorps %ymm1, %ymm0, %ymm0
; AVX1-NEXT: retq
;
; AVX2-LABEL: blend_neg_logic_v8i32:
; AVX2: # %bb.0: # %entry
; AVX2-NEXT: vpsrad $31, %ymm1, %ymm1
; AVX2-NEXT: vpxor %ymm1, %ymm0, %ymm0
; AVX2-NEXT: vpsubd %ymm1, %ymm0, %ymm0
; AVX2-NEXT: retq
entry:
%b.lobit = ashr <8 x i32> %b, <i32 31, i32 31, i32 31, i32 31, i32 31, i32 31, i32 31, i32 31>
%sub = sub nsw <8 x i32> zeroinitializer, %a
%0 = xor <8 x i32> %b.lobit, <i32 -1, i32 -1, i32 -1, i32 -1, i32 -1, i32 -1, i32 -1, i32 -1>
%1 = and <8 x i32> %a, %0
%2 = and <8 x i32> %b.lobit, %sub
%cond = or <8 x i32> %1, %2
ret <8 x i32> %cond
}
define <4 x i32> @blend_neg_logic_v4i32_2(<4 x i32> %v, <4 x i32> %c) {
; SSE-LABEL: blend_neg_logic_v4i32_2:
; SSE: # %bb.0: # %entry
; SSE-NEXT: psrad $31, %xmm1
; SSE-NEXT: pxor %xmm1, %xmm0
; SSE-NEXT: psubd %xmm0, %xmm1
; SSE-NEXT: movdqa %xmm1, %xmm0
; SSE-NEXT: retq
;
; AVX-LABEL: blend_neg_logic_v4i32_2:
; AVX: # %bb.0: # %entry
; AVX-NEXT: vpsrad $31, %xmm1, %xmm1
; AVX-NEXT: vpxor %xmm1, %xmm0, %xmm0
; AVX-NEXT: vpsubd %xmm0, %xmm1, %xmm0
; AVX-NEXT: retq
entry:
%0 = ashr <4 x i32> %c, <i32 31, i32 31, i32 31, i32 31>
%1 = trunc <4 x i32> %0 to <4 x i1>
%2 = sub nsw <4 x i32> zeroinitializer, %v
%3 = select <4 x i1> %1, <4 x i32> %v, <4 x i32> %2
ret <4 x i32> %3
}