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Factor duplicate calls to getUNDEF in several functions.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161860 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Craig Topper 2012-08-14 08:18:43 +00:00
parent 6d6881532c
commit cacafd410b
1 changed files with 10 additions and 10 deletions
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20
lib/Target/X86/X86ISelLowering.cpp
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@ -13266,8 +13266,9 @@ SDValue X86TargetLowering::PerformTruncateCombine(SDNode *N, SelectionDAG &DAG,
// PSHUFD
static const int ShufMask1[] = {0, 2, 0, 0};
OpLo = DAG.getVectorShuffle(VT, dl, OpLo, DAG.getUNDEF(VT), ShufMask1);
OpHi = DAG.getVectorShuffle(VT, dl, OpHi, DAG.getUNDEF(VT), ShufMask1);
SDValue Undef = DAG.getUNDEF(VT);
OpLo = DAG.getVectorShuffle(VT, dl, OpLo, Undef, ShufMask1);
OpHi = DAG.getVectorShuffle(VT, dl, OpHi, Undef, ShufMask1);
// MOVLHPS
static const int ShufMask2[] = {0, 1, 4, 5};
@ -13325,10 +13326,9 @@ SDValue X86TargetLowering::PerformTruncateCombine(SDNode *N, SelectionDAG &DAG,
static const int ShufMask1[] = {0, 1, 4, 5, 8, 9, 12, 13,
-1, -1, -1, -1, -1, -1, -1, -1};
OpLo = DAG.getVectorShuffle(MVT::v16i8, dl, OpLo, DAG.getUNDEF(MVT::v16i8),
ShufMask1);
OpHi = DAG.getVectorShuffle(MVT::v16i8, dl, OpHi, DAG.getUNDEF(MVT::v16i8),
ShufMask1);
SDValue Undef = DAG.getUNDEF(MVT::v16i8);
OpLo = DAG.getVectorShuffle(MVT::v16i8, dl, OpLo, Undef, ShufMask1);
OpHi = DAG.getVectorShuffle(MVT::v16i8, dl, OpHi, Undef, ShufMask1);
OpLo = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, OpLo);
OpHi = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, OpHi);
@ -15277,19 +15277,19 @@ static SDValue PerformSExtCombine(SDNode *N, SelectionDAG &DAG,
// concat the vectors to original VT
unsigned NumElems = OpVT.getVectorNumElements();
SDValue Undef = DAG.getUNDEF(OpVT);
SmallVector<int,8> ShufMask1(NumElems, -1);
for (unsigned i = 0; i != NumElems/2; ++i)
ShufMask1[i] = i;
SDValue OpLo = DAG.getVectorShuffle(OpVT, dl, Op, DAG.getUNDEF(OpVT),
&ShufMask1[0]);
SDValue OpLo = DAG.getVectorShuffle(OpVT, dl, Op, Undef, &ShufMask1[0]);
SmallVector<int,8> ShufMask2(NumElems, -1);
for (unsigned i = 0; i != NumElems/2; ++i)
ShufMask2[i] = i + NumElems/2;
SDValue OpHi = DAG.getVectorShuffle(OpVT, dl, Op, DAG.getUNDEF(OpVT),
&ShufMask2[0]);
SDValue OpHi = DAG.getVectorShuffle(OpVT, dl, Op, Undef, &ShufMask2[0]);
EVT HalfVT = EVT::getVectorVT(*DAG.getContext(), VT.getScalarType(),
VT.getVectorNumElements()/2);