[llvm] r229849 - [x86] Simplify the pre-SSSE3 v16i8 lowering significantly by decomposing
Chandler Carruth
chandlerc at gmail.com
Thu Feb 19 05:15:12 PST 2015
Author: chandlerc
Date: Thu Feb 19 07:15:12 2015
New Revision: 229849
URL: http://llvm.org/viewvc/llvm-project?rev=229849&view=rev
Log:
[x86] Simplify the pre-SSSE3 v16i8 lowering significantly by decomposing
them into permutes and a blend with the generic decomposition logic.
This works really well in almost every case and lets the code only
manage the expansion of a single input into two v8i16 vectors to perform
the actual shuffle. The blend-based merging is often much nicer than the
pack based merging that this replaces. The only place where it isn't we
end up blending between two packs when we could do a single pack. To
handle that case, just teach the v2i64 lowering to handle these blends
by digging out the operands.
With this we're down to only really random permutations that cause an
explosion of instructions.
Modified:
llvm/trunk/lib/Target/X86/X86ISelLowering.cpp
llvm/trunk/test/CodeGen/X86/sse3.ll
llvm/trunk/test/CodeGen/X86/vector-shuffle-128-v16.ll
Modified: llvm/trunk/lib/Target/X86/X86ISelLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86ISelLowering.cpp?rev=229849&r1=229848&r2=229849&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86ISelLowering.cpp (original)
+++ llvm/trunk/lib/Target/X86/X86ISelLowering.cpp Thu Feb 19 07:15:12 2015
@@ -8645,6 +8645,25 @@ static SDValue lowerV2I64VectorShuffle(S
assert(Mask[0] < 2 && "We sort V1 to be the first input.");
assert(Mask[1] >= 2 && "We sort V2 to be the second input.");
+ // If we have a blend of two PACKUS operations an the blend aligns with the
+ // low and half halves, we can just merge the PACKUS operations. This is
+ // particularly important as it lets us merge shuffles that this routine itself
+ // creates.
+ auto GetPackNode = [](SDValue V) {
+ while (V.getOpcode() == ISD::BITCAST)
+ V = V.getOperand(0);
+
+ return V.getOpcode() == X86ISD::PACKUS ? V : SDValue();
+ };
+ if (SDValue V1Pack = GetPackNode(V1))
+ if (SDValue V2Pack = GetPackNode(V2))
+ return DAG.getNode(ISD::BITCAST, DL, MVT::v2i64,
+ DAG.getNode(X86ISD::PACKUS, DL, MVT::v16i8,
+ Mask[0] == 0 ? V1Pack.getOperand(0)
+ : V1Pack.getOperand(1),
+ Mask[1] == 2 ? V2Pack.getOperand(0)
+ : V2Pack.getOperand(1)));
+
// Try to use shift instructions.
if (SDValue Shift =
lowerVectorShuffleAsShift(DL, MVT::v2i64, V1, V2, Mask, DAG))
@@ -9838,33 +9857,24 @@ static SDValue lowerV16I8VectorShuffle(S
assert(V1.getSimpleValueType() == MVT::v16i8 && "Bad operand type!");
assert(V2.getSimpleValueType() == MVT::v16i8 && "Bad operand type!");
ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
- ArrayRef<int> OrigMask = SVOp->getMask();
- assert(OrigMask.size() == 16 && "Unexpected mask size for v16 shuffle!");
+ ArrayRef<int> Mask = SVOp->getMask();
+ assert(Mask.size() == 16 && "Unexpected mask size for v16 shuffle!");
// Try to use shift instructions.
if (SDValue Shift =
- lowerVectorShuffleAsShift(DL, MVT::v16i8, V1, V2, OrigMask, DAG))
+ lowerVectorShuffleAsShift(DL, MVT::v16i8, V1, V2, Mask, DAG))
return Shift;
// Try to use byte rotation instructions.
if (SDValue Rotate = lowerVectorShuffleAsByteRotate(
- DL, MVT::v16i8, V1, V2, OrigMask, Subtarget, DAG))
+ DL, MVT::v16i8, V1, V2, Mask, Subtarget, DAG))
return Rotate;
// Try to use a zext lowering.
if (SDValue ZExt = lowerVectorShuffleAsZeroOrAnyExtend(
- DL, MVT::v16i8, V1, V2, OrigMask, Subtarget, DAG))
+ DL, MVT::v16i8, V1, V2, Mask, Subtarget, DAG))
return ZExt;
- int MaskStorage[16] = {
- OrigMask[0], OrigMask[1], OrigMask[2], OrigMask[3],
- OrigMask[4], OrigMask[5], OrigMask[6], OrigMask[7],
- OrigMask[8], OrigMask[9], OrigMask[10], OrigMask[11],
- OrigMask[12], OrigMask[13], OrigMask[14], OrigMask[15]};
- MutableArrayRef<int> Mask(MaskStorage);
- MutableArrayRef<int> LoMask = Mask.slice(0, 8);
- MutableArrayRef<int> HiMask = Mask.slice(8, 8);
-
int NumV2Elements =
std::count_if(Mask.begin(), Mask.end(), [](int M) { return M >= 16; });
@@ -10102,72 +10112,58 @@ static SDValue lowerV16I8VectorShuffle(S
return Result;
}
- int V1LoBlendMask[8] = {-1, -1, -1, -1, -1, -1, -1, -1};
- int V1HiBlendMask[8] = {-1, -1, -1, -1, -1, -1, -1, -1};
- int V2LoBlendMask[8] = {-1, -1, -1, -1, -1, -1, -1, -1};
- int V2HiBlendMask[8] = {-1, -1, -1, -1, -1, -1, -1, -1};
-
- auto buildBlendMasks = [](MutableArrayRef<int> HalfMask,
- MutableArrayRef<int> V1HalfBlendMask,
- MutableArrayRef<int> V2HalfBlendMask) {
- for (int i = 0; i < 8; ++i)
- if (HalfMask[i] >= 0 && HalfMask[i] < 16) {
- V1HalfBlendMask[i] = HalfMask[i];
- HalfMask[i] = i;
- } else if (HalfMask[i] >= 16) {
- V2HalfBlendMask[i] = HalfMask[i] - 16;
- HalfMask[i] = i + 8;
- }
- };
- buildBlendMasks(LoMask, V1LoBlendMask, V2LoBlendMask);
- buildBlendMasks(HiMask, V1HiBlendMask, V2HiBlendMask);
+ // Handle multi-input cases by blending single-input shuffles.
+ if (NumV2Elements > 0)
+ return lowerVectorShuffleAsDecomposedShuffleBlend(DL, MVT::v16i8, V1, V2,
+ Mask, DAG);
- SDValue Zero = getZeroVector(MVT::v8i16, Subtarget, DAG, DL);
+ // The fallback path for single-input shuffles widens this into two v8i16
+ // vectors with unpacks, shuffles those, and then pulls them back together
+ // with a pack.
+ SDValue V = V1;
- auto buildLoAndHiV8s = [&](SDValue V, MutableArrayRef<int> LoBlendMask,
- MutableArrayRef<int> HiBlendMask) {
- SDValue V1, V2;
- // Check if any of the odd lanes in the v16i8 are used. If not, we can mask
- // them out and avoid using UNPCK{L,H} to extract the elements of V as
- // i16s.
- if (std::none_of(LoBlendMask.begin(), LoBlendMask.end(),
- [](int M) { return M >= 0 && M % 2 == 1; }) &&
- std::none_of(HiBlendMask.begin(), HiBlendMask.end(),
- [](int M) { return M >= 0 && M % 2 == 1; })) {
- // Use a mask to drop the high bytes.
- V1 = DAG.getNode(ISD::BITCAST, DL, MVT::v8i16, V);
- V1 = DAG.getNode(ISD::AND, DL, MVT::v8i16, V1,
- DAG.getConstant(0x00FF, MVT::v8i16));
-
- // This will be a single vector shuffle instead of a blend so nuke V2.
- V2 = DAG.getUNDEF(MVT::v8i16);
-
- // Squash the masks to point directly into V1.
- for (int &M : LoBlendMask)
- if (M >= 0)
- M /= 2;
- for (int &M : HiBlendMask)
- if (M >= 0)
- M /= 2;
- } else {
- // Otherwise just unpack the low half of V into V1 and the high half into
- // V2 so that we can blend them as i16s.
- V1 = DAG.getNode(ISD::BITCAST, DL, MVT::v8i16,
- DAG.getNode(X86ISD::UNPCKL, DL, MVT::v16i8, V, Zero));
- V2 = DAG.getNode(ISD::BITCAST, DL, MVT::v8i16,
- DAG.getNode(X86ISD::UNPCKH, DL, MVT::v16i8, V, Zero));
- }
+ int LoBlendMask[8] = {-1, -1, -1, -1, -1, -1, -1, -1};
+ int HiBlendMask[8] = {-1, -1, -1, -1, -1, -1, -1, -1};
+ for (int i = 0; i < 16; ++i)
+ if (Mask[i] >= 0)
+ (i < 8 ? LoBlendMask[i] : HiBlendMask[i % 8]) = Mask[i];
- SDValue BlendedLo = DAG.getVectorShuffle(MVT::v8i16, DL, V1, V2, LoBlendMask);
- SDValue BlendedHi = DAG.getVectorShuffle(MVT::v8i16, DL, V1, V2, HiBlendMask);
- return std::make_pair(BlendedLo, BlendedHi);
- };
- SDValue V1Lo, V1Hi, V2Lo, V2Hi;
- std::tie(V1Lo, V1Hi) = buildLoAndHiV8s(V1, V1LoBlendMask, V1HiBlendMask);
- std::tie(V2Lo, V2Hi) = buildLoAndHiV8s(V2, V2LoBlendMask, V2HiBlendMask);
+ SDValue Zero = getZeroVector(MVT::v8i16, Subtarget, DAG, DL);
+
+ SDValue VLoHalf, VHiHalf;
+ // Check if any of the odd lanes in the v16i8 are used. If not, we can mask
+ // them out and avoid using UNPCK{L,H} to extract the elements of V as
+ // i16s.
+ if (std::none_of(std::begin(LoBlendMask), std::end(LoBlendMask),
+ [](int M) { return M >= 0 && M % 2 == 1; }) &&
+ std::none_of(std::begin(HiBlendMask), std::end(HiBlendMask),
+ [](int M) { return M >= 0 && M % 2 == 1; })) {
+ // Use a mask to drop the high bytes.
+ VLoHalf = DAG.getNode(ISD::BITCAST, DL, MVT::v8i16, V);
+ VLoHalf = DAG.getNode(ISD::AND, DL, MVT::v8i16, VLoHalf,
+ DAG.getConstant(0x00FF, MVT::v8i16));
+
+ // This will be a single vector shuffle instead of a blend so nuke VHiHalf.
+ VHiHalf = DAG.getUNDEF(MVT::v8i16);
+
+ // Squash the masks to point directly into VLoHalf.
+ for (int &M : LoBlendMask)
+ if (M >= 0)
+ M /= 2;
+ for (int &M : HiBlendMask)
+ if (M >= 0)
+ M /= 2;
+ } else {
+ // Otherwise just unpack the low half of V into VLoHalf and the high half into
+ // VHiHalf so that we can blend them as i16s.
+ VLoHalf = DAG.getNode(ISD::BITCAST, DL, MVT::v8i16,
+ DAG.getNode(X86ISD::UNPCKL, DL, MVT::v16i8, V, Zero));
+ VHiHalf = DAG.getNode(ISD::BITCAST, DL, MVT::v8i16,
+ DAG.getNode(X86ISD::UNPCKH, DL, MVT::v16i8, V, Zero));
+ }
- SDValue LoV = DAG.getVectorShuffle(MVT::v8i16, DL, V1Lo, V2Lo, LoMask);
- SDValue HiV = DAG.getVectorShuffle(MVT::v8i16, DL, V1Hi, V2Hi, HiMask);
+ SDValue LoV = DAG.getVectorShuffle(MVT::v8i16, DL, VLoHalf, VHiHalf, LoBlendMask);
+ SDValue HiV = DAG.getVectorShuffle(MVT::v8i16, DL, VLoHalf, VHiHalf, HiBlendMask);
return DAG.getNode(X86ISD::PACKUS, DL, MVT::v16i8, LoV, HiV);
}
Modified: llvm/trunk/test/CodeGen/X86/sse3.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/X86/sse3.ll?rev=229849&r1=229848&r2=229849&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/X86/sse3.ll (original)
+++ llvm/trunk/test/CodeGen/X86/sse3.ll Thu Feb 19 07:15:12 2015
@@ -257,17 +257,14 @@ entry:
define <16 x i8> @t16(<16 x i8> %T0) nounwind readnone {
; X64-LABEL: t16:
; X64: ## BB#0: ## %entry
-; X64-NEXT: movdqa {{.*#+}} xmm1 = [0,0,0,0,1,1,1,1,0,0,0,0,0,0,0,0]
-; X64-NEXT: punpcklwd {{.*#+}} xmm1 = xmm1[0],xmm0[0],xmm1[1],xmm0[1],xmm1[2],xmm0[2],xmm1[3],xmm0[3]
-; X64-NEXT: pxor %xmm2, %xmm2
-; X64-NEXT: punpcklbw {{.*#+}} xmm0 = xmm0[0],xmm2[0],xmm0[1],xmm2[1],xmm0[2],xmm2[2],xmm0[3],xmm2[3],xmm0[4],xmm2[4],xmm0[5],xmm2[5],xmm0[6],xmm2[6],xmm0[7],xmm2[7]
-; X64-NEXT: pshufd {{.*#+}} xmm3 = xmm0[0,0,1,1]
-; X64-NEXT: movdqa {{.*#+}} xmm0 = [65535,65535,65535,0,65535,65535,65535,65535]
-; X64-NEXT: punpcklbw {{.*#+}} xmm1 = xmm1[0],xmm2[0],xmm1[1],xmm2[1],xmm1[2],xmm2[2],xmm1[3],xmm2[3],xmm1[4],xmm2[4],xmm1[5],xmm2[5],xmm1[6],xmm2[6],xmm1[7],xmm2[7]
-; X64-NEXT: pand %xmm0, %xmm1
-; X64-NEXT: pandn %xmm3, %xmm0
-; X64-NEXT: por %xmm1, %xmm0
-; X64-NEXT: packuswb %xmm0, %xmm0
+; X64-NEXT: movdqa {{.*#+}} xmm2 = [0,0,0,0,1,1,1,1,0,0,0,0,0,0,0,0]
+; X64-NEXT: punpcklwd {{.*#+}} xmm2 = xmm2[0],xmm0[0],xmm2[1],xmm0[1],xmm2[2],xmm0[2],xmm2[3],xmm0[3]
+; X64-NEXT: pslld $16, %xmm0
+; X64-NEXT: movdqa {{.*#+}} xmm1 = [255,255,255,0,255,255,255,255,255,255,255,255,255,255,255,255]
+; X64-NEXT: pand %xmm1, %xmm2
+; X64-NEXT: pandn %xmm0, %xmm1
+; X64-NEXT: por %xmm2, %xmm1
+; X64-NEXT: movdqa %xmm1, %xmm0
; X64-NEXT: retq
entry:
%tmp8 = shufflevector <16 x i8> <i8 0, i8 0, i8 0, i8 0, i8 1, i8 1, i8 1, i8 1, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0>, <16 x i8> %T0, <16 x i32> < i32 0, i32 1, i32 16, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef , i32 undef >
Modified: llvm/trunk/test/CodeGen/X86/vector-shuffle-128-v16.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/X86/vector-shuffle-128-v16.ll?rev=229849&r1=229848&r2=229849&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/X86/vector-shuffle-128-v16.ll (original)
+++ llvm/trunk/test/CodeGen/X86/vector-shuffle-128-v16.ll Thu Feb 19 07:15:12 2015
@@ -249,21 +249,14 @@ define <16 x i8> @shuffle_v16i8_08_24_09
define <16 x i8> @shuffle_v16i8_16_00_16_01_16_02_16_03_16_04_16_05_16_06_16_07(<16 x i8> %a, <16 x i8> %b) {
; SSE2-LABEL: shuffle_v16i8_16_00_16_01_16_02_16_03_16_04_16_05_16_06_16_07:
; SSE2: # BB#0:
-; SSE2-NEXT: pxor %xmm2, %xmm2
-; SSE2-NEXT: punpcklbw {{.*#+}} xmm0 = xmm0[0],xmm2[0],xmm0[1],xmm2[1],xmm0[2],xmm2[2],xmm0[3],xmm2[3],xmm0[4],xmm2[4],xmm0[5],xmm2[5],xmm0[6],xmm2[6],xmm0[7],xmm2[7]
-; SSE2-NEXT: movdqa %xmm0, %xmm3
-; SSE2-NEXT: punpckhwd {{.*#+}} xmm3 = xmm3[4,4,5,5,6,6,7,7]
-; SSE2-NEXT: movdqa {{.*#+}} xmm2 = [65535,0,65535,0,65535,0,65535,0]
-; SSE2-NEXT: movdqa %xmm2, %xmm4
-; SSE2-NEXT: pandn %xmm3, %xmm4
-; SSE2-NEXT: pand {{.*}}(%rip), %xmm1
-; SSE2-NEXT: pshufd {{.*#+}} xmm1 = xmm1[0,0,0,0]
+; SSE2-NEXT: punpcklbw {{.*#+}} xmm0 = xmm0[0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7]
+; SSE2-NEXT: movdqa {{.*#+}} xmm2 = [255,0,255,0,255,0,255,0,255,0,255,0,255,0,255,0]
+; SSE2-NEXT: pshufd {{.*#+}} xmm1 = xmm1[0,1,0,3]
+; SSE2-NEXT: pshuflw {{.*#+}} xmm1 = xmm1[0,0,0,0,4,5,6,7]
+; SSE2-NEXT: pshufhw {{.*#+}} xmm1 = xmm1[0,1,2,3,4,4,4,4]
; SSE2-NEXT: pand %xmm2, %xmm1
-; SSE2-NEXT: por %xmm1, %xmm4
-; SSE2-NEXT: punpcklwd {{.*#+}} xmm0 = xmm0[0,0,1,1,2,2,3,3]
; SSE2-NEXT: pandn %xmm0, %xmm2
; SSE2-NEXT: por %xmm1, %xmm2
-; SSE2-NEXT: packuswb %xmm4, %xmm2
; SSE2-NEXT: movdqa %xmm2, %xmm0
; SSE2-NEXT: retq
;
@@ -374,21 +367,22 @@ define <16 x i8> @shuffle_v16i8_03_02_01
define <16 x i8> @shuffle_v16i8_03_02_01_00_31_30_29_28_11_10_09_08_23_22_21_20(<16 x i8> %a, <16 x i8> %b) {
; SSE2-LABEL: shuffle_v16i8_03_02_01_00_31_30_29_28_11_10_09_08_23_22_21_20:
; SSE2: # BB#0:
-; SSE2-NEXT: pxor %xmm2, %xmm2
-; SSE2-NEXT: movdqa %xmm1, %xmm3
-; SSE2-NEXT: punpcklbw {{.*#+}} xmm3 = xmm3[0],xmm2[0],xmm3[1],xmm2[1],xmm3[2],xmm2[2],xmm3[3],xmm2[3],xmm3[4],xmm2[4],xmm3[5],xmm2[5],xmm3[6],xmm2[6],xmm3[7],xmm2[7]
-; SSE2-NEXT: pshufhw {{.*#+}} xmm3 = xmm3[0,1,2,3,7,6,5,4]
-; SSE2-NEXT: movdqa %xmm0, %xmm4
-; SSE2-NEXT: punpckhbw {{.*#+}} xmm4 = xmm4[8],xmm2[8],xmm4[9],xmm2[9],xmm4[10],xmm2[10],xmm4[11],xmm2[11],xmm4[12],xmm2[12],xmm4[13],xmm2[13],xmm4[14],xmm2[14],xmm4[15],xmm2[15]
-; SSE2-NEXT: pshuflw {{.*#+}} xmm4 = xmm4[3,2,1,0,4,5,6,7]
-; SSE2-NEXT: movsd {{.*#+}} xmm3 = xmm4[0],xmm3[1]
-; SSE2-NEXT: punpckhbw {{.*#+}} xmm1 = xmm1[8],xmm2[8],xmm1[9],xmm2[9],xmm1[10],xmm2[10],xmm1[11],xmm2[11],xmm1[12],xmm2[12],xmm1[13],xmm2[13],xmm1[14],xmm2[14],xmm1[15],xmm2[15]
-; SSE2-NEXT: pshufhw {{.*#+}} xmm1 = xmm1[0,1,2,3,7,6,5,4]
-; SSE2-NEXT: punpcklbw {{.*#+}} xmm0 = xmm0[0],xmm2[0],xmm0[1],xmm2[1],xmm0[2],xmm2[2],xmm0[3],xmm2[3],xmm0[4],xmm2[4],xmm0[5],xmm2[5],xmm0[6],xmm2[6],xmm0[7],xmm2[7]
+; 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: pxor %xmm1, %xmm1
+; SSE2-NEXT: movdqa %xmm0, %xmm2
+; SSE2-NEXT: punpckhbw {{.*#+}} xmm2 = xmm2[8],xmm1[8],xmm2[9],xmm1[9],xmm2[10],xmm1[10],xmm2[11],xmm1[11],xmm2[12],xmm1[12],xmm2[13],xmm1[13],xmm2[14],xmm1[14],xmm2[15],xmm1[15]
+; SSE2-NEXT: pshuflw {{.*#+}} xmm3 = xmm2[3,2,1,0,4,5,6,7]
+; SSE2-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]
+; SSE2-NEXT: pshufd {{.*#+}} xmm1 = xmm0[2,3,2,3]
+; SSE2-NEXT: pshuflw {{.*#+}} xmm1 = xmm1[3,2,1,0,4,5,6,7]
+; SSE2-NEXT: punpcklqdq {{.*#+}} xmm3 = xmm3[0],xmm1[0]
; SSE2-NEXT: pshuflw {{.*#+}} xmm0 = xmm0[3,2,1,0,4,5,6,7]
-; SSE2-NEXT: movsd {{.*#+}} xmm1 = xmm0[0],xmm1[1]
-; SSE2-NEXT: packuswb %xmm3, %xmm1
-; SSE2-NEXT: movdqa %xmm1, %xmm0
+; SSE2-NEXT: pshufd {{.*#+}} xmm1 = xmm2[2,3,2,3]
+; SSE2-NEXT: pshuflw {{.*#+}} xmm1 = xmm1[3,2,1,0,4,5,6,7]
+; SSE2-NEXT: punpcklqdq {{.*#+}} xmm0 = xmm0[0],xmm1[0]
+; SSE2-NEXT: packuswb %xmm3, %xmm0
; SSE2-NEXT: retq
;
; SSSE3-LABEL: shuffle_v16i8_03_02_01_00_31_30_29_28_11_10_09_08_23_22_21_20:
@@ -623,11 +617,8 @@ define <16 x i8> @PR20540(<8 x i8> %a) {
; SSE2-LABEL: PR20540:
; SSE2: # BB#0:
; SSE2-NEXT: pand {{.*}}(%rip), %xmm0
-; SSE2-NEXT: pxor %xmm1, %xmm1
-; SSE2-NEXT: pshufd {{.*#+}} xmm1 = xmm1[0,1,0,3]
-; SSE2-NEXT: pshuflw {{.*#+}} xmm1 = xmm1[0,0,0,0,4,5,6,7]
-; SSE2-NEXT: pshufhw {{.*#+}} xmm1 = xmm1[0,1,2,3,4,4,4,4]
-; SSE2-NEXT: packuswb %xmm1, %xmm0
+; SSE2-NEXT: packuswb %xmm0, %xmm0
+; SSE2-NEXT: movq {{.*#+}} xmm0 = xmm0[0],zero
; SSE2-NEXT: retq
;
; SSSE3-LABEL: PR20540:
@@ -1123,26 +1114,20 @@ define <16 x i8> @shuffle_v16i8_uu_10_02
; SSE2-NEXT: pshufd {{.*#+}} xmm2 = xmm2[2,1,2,3]
; SSE2-NEXT: pshuflw {{.*#+}} xmm2 = xmm2[0,0,2,1,4,5,6,7]
; SSE2-NEXT: punpcklqdq {{.*#+}} xmm2 = xmm2[0],xmm0[0]
-; SSE2-NEXT: movdqa {{.*#+}} xmm3 = [0,65535,65535,65535,0,65535,65535,65535]
-; SSE2-NEXT: pand %xmm3, %xmm2
-; SSE2-NEXT: pand {{.*}}(%rip), %xmm1
-; SSE2-NEXT: pshufd {{.*#+}} xmm0 = xmm1[0,1,0,3]
-; SSE2-NEXT: pshuflw {{.*#+}} xmm0 = xmm0[1,1,2,3,4,5,6,7]
-; SSE2-NEXT: pshufhw {{.*#+}} xmm0 = xmm0[0,1,2,3,5,5,6,7]
-; SSE2-NEXT: pandn %xmm0, %xmm3
-; SSE2-NEXT: por %xmm2, %xmm3
; SSE2-NEXT: pshuflw {{.*#+}} xmm0 = xmm5[1,1,2,3,4,5,6,7]
; SSE2-NEXT: punpcklwd {{.*#+}} xmm4 = xmm4[0],xmm0[0],xmm4[1],xmm0[1],xmm4[2],xmm0[2],xmm4[3],xmm0[3]
; SSE2-NEXT: pshufd {{.*#+}} xmm0 = xmm4[0,2,2,3]
; SSE2-NEXT: pshuflw {{.*#+}} xmm0 = xmm0[2,1,0,3,4,5,6,7]
-; SSE2-NEXT: pshuflw {{.*#+}} xmm2 = xmm5[0,2,2,1,4,5,6,7]
-; SSE2-NEXT: punpcklwd {{.*#+}} xmm2 = xmm2[0],xmm0[0],xmm2[1],xmm0[1],xmm2[2],xmm0[2],xmm2[3],xmm0[3]
-; SSE2-NEXT: movdqa {{.*#+}} xmm0 = [65535,65535,65535,65535,0,65535,65535,65535]
-; SSE2-NEXT: pand %xmm0, %xmm2
-; SSE2-NEXT: pslldq {{.*#+}} xmm1 = zero,zero,xmm1[0,1,2,3,4,5,6,7,8,9,10,11,12,13]
+; SSE2-NEXT: pshuflw {{.*#+}} xmm3 = xmm5[0,2,2,1,4,5,6,7]
+; SSE2-NEXT: punpcklwd {{.*#+}} xmm3 = xmm3[0],xmm0[0],xmm3[1],xmm0[1],xmm3[2],xmm0[2],xmm3[3],xmm0[3]
+; SSE2-NEXT: packuswb %xmm2, %xmm3
+; SSE2-NEXT: movdqa {{.*#+}} xmm0 = [255,255,255,255,0,255,255,255,0,255,255,255,0,255,255,255]
+; SSE2-NEXT: pand %xmm0, %xmm3
+; SSE2-NEXT: pshufd {{.*#+}} xmm1 = xmm1[0,1,0,3]
+; SSE2-NEXT: pshuflw {{.*#+}} xmm1 = xmm1[0,1,3,3,4,5,6,7]
+; SSE2-NEXT: pshufhw {{.*#+}} xmm1 = xmm1[0,1,2,3,5,5,5,7]
; SSE2-NEXT: pandn %xmm1, %xmm0
-; SSE2-NEXT: por %xmm2, %xmm0
-; SSE2-NEXT: packuswb %xmm3, %xmm0
+; SSE2-NEXT: por %xmm3, %xmm0
; SSE2-NEXT: retq
;
; SSSE3-LABEL: shuffle_v16i8_uu_10_02_07_22_14_07_02_18_03_01_14_18_09_11_00:
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