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Add VPERMQ/VPERMPD to the list of target specific shuffles that can be looked through for DAG combine purposes.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@156266 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Craig Topper 2012-05-06 18:54:26 +00:00
parent 156f5bb56e
commit bdcbcb3ae7
1 changed files with 6 additions and 0 deletions
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6
lib/Target/X86/X86ISelLowering.cpp
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@ -2914,6 +2914,7 @@ static bool isTargetShuffle(unsigned Opcode) {
case X86ISD::UNPCKH:
case X86ISD::VPERMILP:
case X86ISD::VPERM2X128:
case X86ISD::VPERMI:
return true;
}
}
@ -4455,6 +4456,11 @@ static bool getTargetShuffleMask(SDNode *N, EVT VT,
DecodePSHUFLWMask(VT, cast<ConstantSDNode>(ImmN)->getZExtValue(), Mask);
IsUnary = true;
break;
case X86ISD::VPERMI:
ImmN = N->getOperand(N->getNumOperands()-1);
DecodeVPERMMask(cast<ConstantSDNode>(ImmN)->getZExtValue(), Mask);
IsUnary = true;
break;
case X86ISD::MOVSS:
case X86ISD::MOVSD: {
// The index 0 always comes from the first element of the second source,