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make explicit that we not handle several mmx shuffles

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@113058 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bruno Cardoso Lopes 2010-09-04 02:50:13 +00:00
parent ffa75cdcf8
commit 828f6ae03c
1 changed files with 8 additions and 8 deletions
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16
lib/Target/X86/X86ISelLowering.cpp
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@ -5467,19 +5467,19 @@ X86TargetLowering::LowerVECTOR_SHUFFLE(SDValue Op, SelectionDAG &DAG) const {
SmallVector<int, 16> M;
SVOp->getMask(M);
// Very little shuffling can be done for 64-bit vectors right now.
if (VT.getSizeInBits() == 64)
return isPALIGNRMask(M, VT, Subtarget->hasSSSE3()) ? Op : SDValue();
// FIXME: pshufb, blends, shifts.
if (VT.getVectorNumElements() == 2)
return Op;
if (isPALIGNRMask(M, VT, HasSSSE3))
return getTargetShuffleNode(X86ISD::PALIGN, dl, VT, V1, V2,
X86::getShufflePALIGNRImmediate(SVOp),
DAG);
// MMX shuffles not already handled must be expanded.
if (VT.getSizeInBits() == 64)
return SDValue();
// FIXME: pshufb, blends, shifts.
if (VT.getVectorNumElements() == 2)
return Op;
if (ShuffleVectorSDNode::isSplatMask(&M[0], VT) &&
SVOp->getSplatIndex() == 0 && V2IsUndef) {
if (VT == MVT::v2f64)