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[X86] Use peekThroughOneUseBitcasts helper function 

llvm-svn: 277279
This commit is contained in:
Simon Pilgrim 2016-07-30 20:51:26 +00:00
parent fbe0fcb009
commit 8bbd3650a6
1 changed files with 2 additions and 5 deletions
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7
llvm/lib/Target/X86/X86ISelLowering.cpp
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@ -25322,8 +25322,7 @@ static bool combineX86ShufflesRecursively(SDValue Op, SDValue Root,
return false;
// Directly rip through bitcasts to find the underlying operand.
while (Op.getOpcode() == ISD::BITCAST && Op.getOperand(0).hasOneUse())
Op = Op.getOperand(0);
Op = peekThroughOneUseBitcasts(Op);
MVT VT = Op.getSimpleValueType();
if (!VT.isVector())
@ -25923,9 +25922,7 @@ static SDValue combineTargetShuffle(SDValue N, SelectionDAG &DAG,
V.getOpcode() == X86ISD::PSHUFHW) &&
V.getOpcode() != N.getOpcode() &&
V.hasOneUse()) {
SDValue D = V.getOperand(0);
while (D.getOpcode() == ISD::BITCAST && D.hasOneUse())
D = D.getOperand(0);
SDValue D = peekThroughOneUseBitcasts(V.getOperand(0));
if (D.getOpcode() == X86ISD::PSHUFD && D.hasOneUse()) {
SmallVector<int, 4> VMask = getPSHUFShuffleMask(V);
SmallVector<int, 4> DMask = getPSHUFShuffleMask(D);