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[X86] LowerMUL - remove vXi8 UNPCK(BUILD_VECTOR,UNDEF) special case handling #168277

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Merged
merged 2 commits into from
Nov 16, 2025
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[X86] LowerMUL - remove vXi8 UNPCK(BUILD_VECTOR,UNDEF) special case handling #168277

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[X86] LowerMUL - remove vXi8 UNPCK(BUILD_VECTOR,UNDEF) special case h…
RKSimon Nov 16, 2025
c31e6be
Merge branch 'main' into x86-mul-vXi8-bv
RKSimon Nov 16, 2025
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22 changes: 2 additions & 20 deletions llvm/lib/Target/X86/X86ISelLowering.cpp
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Expand Up @@ -29647,26 +29647,8 @@ static SDValue LowerMUL(SDValue Op, const X86Subtarget &Subtarget,
SDValue Undef = DAG.getUNDEF(VT);
SDValue ALo = DAG.getBitcast(ExVT, getUnpackl(DAG, dl, VT, A, Undef));
SDValue AHi = DAG.getBitcast(ExVT, getUnpackh(DAG, dl, VT, A, Undef));

SDValue BLo, BHi;
if (ISD::isBuildVectorOfConstantSDNodes(B.getNode())) {
// If the RHS is a constant, manually unpackl/unpackh.
SmallVector<SDValue, 16> LoOps, HiOps;
for (unsigned i = 0; i != NumElts; i += 16) {
for (unsigned j = 0; j != 8; ++j) {
LoOps.push_back(DAG.getAnyExtOrTrunc(B.getOperand(i + j), dl,
MVT::i16));
HiOps.push_back(DAG.getAnyExtOrTrunc(B.getOperand(i + j + 8), dl,
MVT::i16));
}
}

BLo = DAG.getBuildVector(ExVT, dl, LoOps);
BHi = DAG.getBuildVector(ExVT, dl, HiOps);
} else {
BLo = DAG.getBitcast(ExVT, getUnpackl(DAG, dl, VT, B, Undef));
BHi = DAG.getBitcast(ExVT, getUnpackh(DAG, dl, VT, B, Undef));
}
SDValue BLo = DAG.getBitcast(ExVT, getUnpackl(DAG, dl, VT, B, Undef));
SDValue BHi = DAG.getBitcast(ExVT, getUnpackh(DAG, dl, VT, B, Undef));

// Multiply, mask the lower 8bits of the lo/hi results and pack.
SDValue RLo = DAG.getNode(ISD::MUL, dl, ExVT, ALo, BLo);
Expand Down
6 changes: 3 additions & 3 deletions llvm/test/CodeGen/X86/pmul.ll
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Expand Up @@ -10,7 +10,7 @@ define <16 x i8> @mul_v16i8c(<16 x i8> %i) nounwind {
; SSE2: # %bb.0: # %entry
; SSE2-NEXT: movdqa %xmm0, %xmm1
; SSE2-NEXT: punpckhbw {{.*#+}} xmm1 = xmm1[8,8,9,9,10,10,11,11,12,12,13,13,14,14,15,15]
; SSE2-NEXT: movdqa {{.*#+}} xmm2 = [117,117,117,117,117,117,117,117]
; SSE2-NEXT: movdqa {{.*#+}} xmm2 = [117,u,117,u,117,u,117,u,117,u,117,u,117,u,117,u]
; SSE2-NEXT: pmullw %xmm2, %xmm1
; SSE2-NEXT: movdqa {{.*#+}} xmm3 = [255,255,255,255,255,255,255,255]
; SSE2-NEXT: pand %xmm3, %xmm1
Expand Down Expand Up @@ -378,7 +378,7 @@ define <32 x i8> @mul_v32i8c(<32 x i8> %i) nounwind {
; SSE2: # %bb.0: # %entry
; SSE2-NEXT: movdqa %xmm0, %xmm2
; SSE2-NEXT: punpckhbw {{.*#+}} xmm2 = xmm2[8,8,9,9,10,10,11,11,12,12,13,13,14,14,15,15]
; SSE2-NEXT: movdqa {{.*#+}} xmm3 = [117,117,117,117,117,117,117,117]
; SSE2-NEXT: movdqa {{.*#+}} xmm3 = [117,u,117,u,117,u,117,u,117,u,117,u,117,u,117,u]
; SSE2-NEXT: pmullw %xmm3, %xmm2
; SSE2-NEXT: movdqa {{.*#+}} xmm4 = [255,255,255,255,255,255,255,255]
; SSE2-NEXT: pand %xmm4, %xmm2
Expand Down Expand Up @@ -729,7 +729,7 @@ define <64 x i8> @mul_v64i8c(<64 x i8> %i) nounwind {
; SSE2: # %bb.0: # %entry
; SSE2-NEXT: movdqa %xmm0, %xmm6
; SSE2-NEXT: punpckhbw {{.*#+}} xmm6 = xmm6[8,8,9,9,10,10,11,11,12,12,13,13,14,14,15,15]
; SSE2-NEXT: movdqa {{.*#+}} xmm4 = [117,117,117,117,117,117,117,117]
; SSE2-NEXT: movdqa {{.*#+}} xmm4 = [117,u,117,u,117,u,117,u,117,u,117,u,117,u,117,u]
; SSE2-NEXT: pmullw %xmm4, %xmm6
; SSE2-NEXT: movdqa {{.*#+}} xmm5 = [255,255,255,255,255,255,255,255]
; SSE2-NEXT: pand %xmm5, %xmm6
Expand Down
8 changes: 4 additions & 4 deletions llvm/test/CodeGen/X86/srem-seteq-vec-nonsplat.ll
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Expand Up @@ -2213,12 +2213,12 @@ define <32 x i1> @pr51133(<32 x i8> %x, <32 x i8> %y) {
; CHECK-SSE2-NEXT: movq %rdi, %rax
; CHECK-SSE2-NEXT: movdqa %xmm1, %xmm5
; CHECK-SSE2-NEXT: punpckhbw {{.*#+}} xmm5 = xmm5[8,8,9,9,10,10,11,11,12,12,13,13,14,14,15,15]
; CHECK-SSE2-NEXT: pmullw {{\.?LCPI[0-9]+_[0-9]+}}(%rip), %xmm5 # [9,0,41,183,1,1,161,221]
; CHECK-SSE2-NEXT: pmullw {{\.?LCPI[0-9]+_[0-9]+}}(%rip), %xmm5 # [9,u,0,u,41,u,183,u,1,u,1,u,161,u,221,u]
; CHECK-SSE2-NEXT: movdqa {{.*#+}} xmm4 = [255,255,255,255,255,255,255,255]
; CHECK-SSE2-NEXT: pand %xmm4, %xmm5
; CHECK-SSE2-NEXT: movdqa %xmm1, %xmm6
; CHECK-SSE2-NEXT: punpcklbw {{.*#+}} xmm6 = xmm6[0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7]
; CHECK-SSE2-NEXT: pmullw {{\.?LCPI[0-9]+_[0-9]+}}(%rip), %xmm6 # [171,103,183,171,61,1,127,183]
; CHECK-SSE2-NEXT: pmullw {{\.?LCPI[0-9]+_[0-9]+}}(%rip), %xmm6 # [171,u,103,u,183,u,171,u,61,u,1,u,127,u,183,u]
; CHECK-SSE2-NEXT: pand %xmm4, %xmm6
; CHECK-SSE2-NEXT: packuswb %xmm5, %xmm6
; CHECK-SSE2-NEXT: paddb {{\.?LCPI[0-9]+_[0-9]+}}(%rip), %xmm6
Expand All @@ -2242,10 +2242,10 @@ define <32 x i1> @pr51133(<32 x i8> %x, <32 x i8> %y) {
; CHECK-SSE2-NEXT: por %xmm7, %xmm5
; CHECK-SSE2-NEXT: movdqa %xmm0, %xmm1
; CHECK-SSE2-NEXT: punpckhbw {{.*#+}} xmm1 = xmm1[8,8,9,9,10,10,11,11,12,12,13,13,14,14,15,15]
; CHECK-SSE2-NEXT: pmullw {{\.?LCPI[0-9]+_[0-9]+}}(%rip), %xmm1 # [223,223,205,183,161,1,171,239]
; CHECK-SSE2-NEXT: pmullw {{\.?LCPI[0-9]+_[0-9]+}}(%rip), %xmm1 # [223,u,223,u,205,u,183,u,161,u,1,u,171,u,239,u]
; CHECK-SSE2-NEXT: pand %xmm4, %xmm1
; CHECK-SSE2-NEXT: punpcklbw {{.*#+}} xmm0 = xmm0[0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7]
; CHECK-SSE2-NEXT: pmullw {{\.?LCPI[0-9]+_[0-9]+}}(%rip), %xmm0 # [197,205,27,241,1,1,1,163]
; CHECK-SSE2-NEXT: pmullw {{\.?LCPI[0-9]+_[0-9]+}}(%rip), %xmm0 # [197,u,205,u,27,u,241,u,1,u,1,u,1,u,163,u]
; CHECK-SSE2-NEXT: pand %xmm4, %xmm0
; CHECK-SSE2-NEXT: packuswb %xmm1, %xmm0
; CHECK-SSE2-NEXT: paddb {{\.?LCPI[0-9]+_[0-9]+}}(%rip), %xmm0
Expand Down
8 changes: 4 additions & 4 deletions llvm/test/CodeGen/X86/vector-fshr-128.ll
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Expand Up @@ -1989,11 +1989,11 @@ define <16 x i8> @constant_funnnel_v16i8(<16 x i8> %x, <16 x i8> %y) nounwind {
; SSE2-NEXT: paddb %xmm0, %xmm0
; SSE2-NEXT: movdqa %xmm0, %xmm2
; SSE2-NEXT: punpckhbw {{.*#+}} xmm2 = xmm2[8,8,9,9,10,10,11,11,12,12,13,13,14,14,15,15]
; SSE2-NEXT: pmullw {{\.?LCPI[0-9]+_[0-9]+}}(%rip), %xmm2 # [128,1,2,4,8,16,32,64]
; SSE2-NEXT: pmullw {{\.?LCPI[0-9]+_[0-9]+}}(%rip), %xmm2 # [128,u,1,u,2,u,4,u,8,u,16,u,32,u,64,u]
; SSE2-NEXT: movdqa {{.*#+}} xmm3 = [255,255,255,255,255,255,255,255]
; SSE2-NEXT: pand %xmm3, %xmm2
; SSE2-NEXT: punpcklbw {{.*#+}} xmm0 = xmm0[0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7]
; SSE2-NEXT: pmullw {{\.?LCPI[0-9]+_[0-9]+}}(%rip), %xmm0 # [128,64,32,16,8,4,2,1]
; SSE2-NEXT: pmullw {{\.?LCPI[0-9]+_[0-9]+}}(%rip), %xmm0 # [128,u,64,u,32,u,16,u,8,u,4,u,2,u,1,u]
; SSE2-NEXT: pand %xmm3, %xmm0
; SSE2-NEXT: packuswb %xmm2, %xmm0
; SSE2-NEXT: por %xmm1, %xmm0
Expand Down Expand Up @@ -2149,11 +2149,11 @@ define <16 x i8> @constant_funnnel_v16i8(<16 x i8> %x, <16 x i8> %y) nounwind {
; X86-SSE2-NEXT: paddb %xmm0, %xmm0
; X86-SSE2-NEXT: movdqa %xmm0, %xmm2
; X86-SSE2-NEXT: punpckhbw {{.*#+}} xmm2 = xmm2[8,8,9,9,10,10,11,11,12,12,13,13,14,14,15,15]
; X86-SSE2-NEXT: pmullw {{\.?LCPI[0-9]+_[0-9]+}}, %xmm2 # [128,1,2,4,8,16,32,64]
; X86-SSE2-NEXT: pmullw {{\.?LCPI[0-9]+_[0-9]+}}, %xmm2 # [128,u,1,u,2,u,4,u,8,u,16,u,32,u,64,u]
; X86-SSE2-NEXT: movdqa {{.*#+}} xmm3 = [255,255,255,255,255,255,255,255]
; X86-SSE2-NEXT: pand %xmm3, %xmm2
; X86-SSE2-NEXT: punpcklbw {{.*#+}} xmm0 = xmm0[0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7]
; X86-SSE2-NEXT: pmullw {{\.?LCPI[0-9]+_[0-9]+}}, %xmm0 # [128,64,32,16,8,4,2,1]
; X86-SSE2-NEXT: pmullw {{\.?LCPI[0-9]+_[0-9]+}}, %xmm0 # [128,u,64,u,32,u,16,u,8,u,4,u,2,u,1,u]
; X86-SSE2-NEXT: pand %xmm3, %xmm0
; X86-SSE2-NEXT: packuswb %xmm2, %xmm0
; X86-SSE2-NEXT: por %xmm1, %xmm0
Expand Down
4 changes: 2 additions & 2 deletions llvm/test/CodeGen/X86/vector-idiv-sdiv-128.ll
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Expand Up @@ -691,11 +691,11 @@ define <16 x i8> @test_remconstant_16i8(<16 x i8> %a) nounwind {
; SSE2-NEXT: psubb %xmm2, %xmm1
; SSE2-NEXT: movdqa %xmm1, %xmm2
; SSE2-NEXT: punpckhbw {{.*#+}} xmm2 = xmm2[8,8,9,9,10,10,11,11,12,12,13,13,14,14,15,15]
; SSE2-NEXT: pmullw {{\.?LCPI[0-9]+_[0-9]+}}(%rip), %xmm2 # [14,13,12,11,10,9,9,7]
; SSE2-NEXT: pmullw {{\.?LCPI[0-9]+_[0-9]+}}(%rip), %xmm2 # [14,u,13,u,12,u,11,u,10,u,9,u,9,u,7,u]
; SSE2-NEXT: movdqa {{.*#+}} xmm3 = [255,255,255,255,255,255,255,255]
; SSE2-NEXT: pand %xmm3, %xmm2
; SSE2-NEXT: punpcklbw {{.*#+}} xmm1 = xmm1[0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7]
; SSE2-NEXT: pmullw {{\.?LCPI[0-9]+_[0-9]+}}(%rip), %xmm1 # [7,8,9,10,11,12,13,14]
; SSE2-NEXT: pmullw {{\.?LCPI[0-9]+_[0-9]+}}(%rip), %xmm1 # [7,u,8,u,9,u,10,u,11,u,12,u,13,u,14,u]
; SSE2-NEXT: pand %xmm3, %xmm1
; SSE2-NEXT: packuswb %xmm2, %xmm1
; SSE2-NEXT: psubb %xmm1, %xmm0
Expand Down
4 changes: 2 additions & 2 deletions llvm/test/CodeGen/X86/vector-idiv-udiv-128.ll
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Expand Up @@ -787,13 +787,13 @@ define <16 x i8> @test_remconstant_16i8(<16 x i8> %a) nounwind {
; SSE2-NEXT: punpckhbw {{.*#+}} xmm3 = xmm3[8],xmm1[8],xmm3[9],xmm1[9],xmm3[10],xmm1[10],xmm3[11],xmm1[11],xmm3[12],xmm1[12],xmm3[13],xmm1[13],xmm3[14],xmm1[14],xmm3[15],xmm1[15]
; SSE2-NEXT: pmullw {{\.?LCPI[0-9]+_[0-9]+}}(%rip), %xmm3 # [64,64,32,32,32,128,128,64]
; SSE2-NEXT: psrlw $8, %xmm3
; SSE2-NEXT: pmullw {{\.?LCPI[0-9]+_[0-9]+}}(%rip), %xmm3 # [14,13,12,11,10,9,9,7]
; SSE2-NEXT: pmullw {{\.?LCPI[0-9]+_[0-9]+}}(%rip), %xmm3 # [14,u,13,u,12,u,11,u,10,u,9,u,9,u,7,u]
; SSE2-NEXT: movdqa {{.*#+}} xmm4 = [255,255,255,255,255,255,255,255]
; SSE2-NEXT: pand %xmm4, %xmm3
; SSE2-NEXT: punpcklbw {{.*#+}} xmm2 = xmm2[0],xmm1[0],xmm2[1],xmm1[1],xmm2[2],xmm1[2],xmm2[3],xmm1[3],xmm2[4],xmm1[4],xmm2[5],xmm1[5],xmm2[6],xmm1[6],xmm2[7],xmm1[7]
; SSE2-NEXT: pmullw {{\.?LCPI[0-9]+_[0-9]+}}(%rip), %xmm2 # [64,256,128,32,32,32,64,64]
; SSE2-NEXT: psrlw $8, %xmm2
; SSE2-NEXT: pmullw {{\.?LCPI[0-9]+_[0-9]+}}(%rip), %xmm2 # [7,8,9,10,11,12,13,14]
; SSE2-NEXT: pmullw {{\.?LCPI[0-9]+_[0-9]+}}(%rip), %xmm2 # [7,u,8,u,9,u,10,u,11,u,12,u,13,u,14,u]
; SSE2-NEXT: pand %xmm4, %xmm2
; SSE2-NEXT: packuswb %xmm3, %xmm2
; SSE2-NEXT: psubb %xmm2, %xmm0
Expand Down
12 changes: 6 additions & 6 deletions llvm/test/CodeGen/X86/vector-mul.ll
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Expand Up @@ -250,7 +250,7 @@ define <16 x i8> @mul_v16i8_1_2_4_8_1_2_4_8_1_2_4_8_1_2_4_8(<16 x i8> %a0) nounw
; SSE2: # %bb.0:
; SSE2-NEXT: movdqa %xmm0, %xmm1
; SSE2-NEXT: punpckhbw {{.*#+}} xmm1 = xmm1[8,8,9,9,10,10,11,11,12,12,13,13,14,14,15,15]
; SSE2-NEXT: movdqa {{.*#+}} xmm2 = [1,2,4,8,1,2,4,8]
; SSE2-NEXT: movdqa {{.*#+}} xmm2 = [1,u,2,u,4,u,8,u,1,u,2,u,4,u,8,u]
; SSE2-NEXT: pmullw %xmm2, %xmm1
; SSE2-NEXT: movdqa {{.*#+}} xmm3 = [255,255,255,255,255,255,255,255]
; SSE2-NEXT: pand %xmm3, %xmm1
Expand Down Expand Up @@ -1058,11 +1058,11 @@ define <16 x i8> @mul_v16i8_2_3_9_17_33_65_129_2_3_9_17_33_65_129_2_3(<16 x i8>
; X86-SSE2: # %bb.0:
; X86-SSE2-NEXT: movdqa %xmm0, %xmm1
; X86-SSE2-NEXT: punpckhbw {{.*#+}} xmm1 = xmm1[8,8,9,9,10,10,11,11,12,12,13,13,14,14,15,15]
; X86-SSE2-NEXT: pmullw {{\.?LCPI[0-9]+_[0-9]+}}, %xmm1 # [3,9,17,33,65,129,2,3]
; X86-SSE2-NEXT: pmullw {{\.?LCPI[0-9]+_[0-9]+}}, %xmm1 # [3,u,9,u,17,u,33,u,65,u,129,u,2,u,3,u]
; X86-SSE2-NEXT: movdqa {{.*#+}} xmm2 = [255,255,255,255,255,255,255,255]
; X86-SSE2-NEXT: pand %xmm2, %xmm1
; X86-SSE2-NEXT: punpcklbw {{.*#+}} xmm0 = xmm0[0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7]
; X86-SSE2-NEXT: pmullw {{\.?LCPI[0-9]+_[0-9]+}}, %xmm0 # [2,3,9,17,33,65,129,2]
; X86-SSE2-NEXT: pmullw {{\.?LCPI[0-9]+_[0-9]+}}, %xmm0 # [2,u,3,u,9,u,17,u,33,u,65,u,129,u,2,u]
; X86-SSE2-NEXT: pand %xmm2, %xmm0
; X86-SSE2-NEXT: packuswb %xmm1, %xmm0
; X86-SSE2-NEXT: retl
Expand All @@ -1081,11 +1081,11 @@ define <16 x i8> @mul_v16i8_2_3_9_17_33_65_129_2_3_9_17_33_65_129_2_3(<16 x i8>
; X64-SSE2: # %bb.0:
; X64-SSE2-NEXT: movdqa %xmm0, %xmm1
; X64-SSE2-NEXT: punpckhbw {{.*#+}} xmm1 = xmm1[8,8,9,9,10,10,11,11,12,12,13,13,14,14,15,15]
; X64-SSE2-NEXT: pmullw {{\.?LCPI[0-9]+_[0-9]+}}(%rip), %xmm1 # [3,9,17,33,65,129,2,3]
; X64-SSE2-NEXT: pmullw {{\.?LCPI[0-9]+_[0-9]+}}(%rip), %xmm1 # [3,u,9,u,17,u,33,u,65,u,129,u,2,u,3,u]
; X64-SSE2-NEXT: movdqa {{.*#+}} xmm2 = [255,255,255,255,255,255,255,255]
; X64-SSE2-NEXT: pand %xmm2, %xmm1
; X64-SSE2-NEXT: punpcklbw {{.*#+}} xmm0 = xmm0[0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7]
; X64-SSE2-NEXT: pmullw {{\.?LCPI[0-9]+_[0-9]+}}(%rip), %xmm0 # [2,3,9,17,33,65,129,2]
; X64-SSE2-NEXT: pmullw {{\.?LCPI[0-9]+_[0-9]+}}(%rip), %xmm0 # [2,u,3,u,9,u,17,u,33,u,65,u,129,u,2,u]
; X64-SSE2-NEXT: pand %xmm2, %xmm0
; X64-SSE2-NEXT: packuswb %xmm1, %xmm0
; X64-SSE2-NEXT: retq
Expand Down Expand Up @@ -1832,7 +1832,7 @@ define <16 x i8> @mul_v16i8_0_1_3_7_15_31_63_127_0_1_3_7_15_31_63_127(<16 x i8>
; SSE2: # %bb.0:
; SSE2-NEXT: movdqa %xmm0, %xmm1
; SSE2-NEXT: punpckhbw {{.*#+}} xmm1 = xmm1[8,8,9,9,10,10,11,11,12,12,13,13,14,14,15,15]
; SSE2-NEXT: movdqa {{.*#+}} xmm2 = [0,1,3,7,15,31,63,127]
; SSE2-NEXT: movdqa {{.*#+}} xmm2 = [0,u,1,u,3,u,7,u,15,u,31,u,63,u,127,u]
; SSE2-NEXT: pmullw %xmm2, %xmm1
; SSE2-NEXT: movdqa {{.*#+}} xmm3 = [255,255,255,255,255,255,255,255]
; SSE2-NEXT: pand %xmm3, %xmm1
Expand Down
8 changes: 4 additions & 4 deletions llvm/test/CodeGen/X86/vector-shift-shl-128.ll
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Expand Up @@ -1151,11 +1151,11 @@ define <16 x i8> @constant_shift_v16i8(<16 x i8> %a) nounwind {
; SSE2: # %bb.0:
; SSE2-NEXT: movdqa %xmm0, %xmm1
; SSE2-NEXT: punpckhbw {{.*#+}} xmm1 = xmm1[8,8,9,9,10,10,11,11,12,12,13,13,14,14,15,15]
; SSE2-NEXT: pmullw {{\.?LCPI[0-9]+_[0-9]+}}(%rip), %xmm1 # [128,64,32,16,8,4,2,1]
; SSE2-NEXT: pmullw {{\.?LCPI[0-9]+_[0-9]+}}(%rip), %xmm1 # [128,u,64,u,32,u,16,u,8,u,4,u,2,u,1,u]
; SSE2-NEXT: movdqa {{.*#+}} xmm2 = [255,255,255,255,255,255,255,255]
; SSE2-NEXT: pand %xmm2, %xmm1
; SSE2-NEXT: punpcklbw {{.*#+}} xmm0 = xmm0[0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7]
; SSE2-NEXT: pmullw {{\.?LCPI[0-9]+_[0-9]+}}(%rip), %xmm0 # [1,2,4,8,16,32,64,128]
; SSE2-NEXT: pmullw {{\.?LCPI[0-9]+_[0-9]+}}(%rip), %xmm0 # [1,u,2,u,4,u,8,u,16,u,32,u,64,u,128,u]
; SSE2-NEXT: pand %xmm2, %xmm0
; SSE2-NEXT: packuswb %xmm1, %xmm0
; SSE2-NEXT: retq
Expand Down Expand Up @@ -1232,11 +1232,11 @@ define <16 x i8> @constant_shift_v16i8(<16 x i8> %a) nounwind {
; X86-SSE: # %bb.0:
; X86-SSE-NEXT: movdqa %xmm0, %xmm1
; X86-SSE-NEXT: punpckhbw {{.*#+}} xmm1 = xmm1[8,8,9,9,10,10,11,11,12,12,13,13,14,14,15,15]
; X86-SSE-NEXT: pmullw {{\.?LCPI[0-9]+_[0-9]+}}, %xmm1 # [128,64,32,16,8,4,2,1]
; X86-SSE-NEXT: pmullw {{\.?LCPI[0-9]+_[0-9]+}}, %xmm1 # [128,u,64,u,32,u,16,u,8,u,4,u,2,u,1,u]
; X86-SSE-NEXT: movdqa {{.*#+}} xmm2 = [255,255,255,255,255,255,255,255]
; X86-SSE-NEXT: pand %xmm2, %xmm1
; X86-SSE-NEXT: punpcklbw {{.*#+}} xmm0 = xmm0[0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7]
; X86-SSE-NEXT: pmullw {{\.?LCPI[0-9]+_[0-9]+}}, %xmm0 # [1,2,4,8,16,32,64,128]
; X86-SSE-NEXT: pmullw {{\.?LCPI[0-9]+_[0-9]+}}, %xmm0 # [1,u,2,u,4,u,8,u,16,u,32,u,64,u,128,u]
; X86-SSE-NEXT: pand %xmm2, %xmm0
; X86-SSE-NEXT: packuswb %xmm1, %xmm0
; X86-SSE-NEXT: retl
Expand Down
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