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Code clean up. No functionality change. 

llvm-svn: 50675
This commit is contained in:
Evan Cheng 2008-05-05 22:12:23 +00:00
parent 00daccdd2a
commit dbfcce37fe
1 changed files with 21 additions and 20 deletions
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41
llvm/lib/Target/X86/X86ISelLowering.cpp
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@ -6214,35 +6214,36 @@ static SDOperand PerformShuffleCombine(SDNode *N, SelectionDAG &DAG,
MVT::ValueType VT = N->getValueType(0);
MVT::ValueType EVT = MVT::getVectorElementType(VT);
SDOperand PermMask = N->getOperand(2);
int NumElems = (int)PermMask.getNumOperands();
unsigned NumElems = PermMask.getNumOperands();
SDNode *Base = NULL;
for (int i = 0; i < NumElems; ++i) {
SDOperand Idx = PermMask.getOperand(i);
if (Idx.getOpcode() == ISD::UNDEF) {
if (!Base) return SDOperand();
} else {
SDOperand Arg =
getShuffleScalarElt(N, cast<ConstantSDNode>(Idx)->getValue(), DAG);
if (!Arg.Val || !ISD::isNON_EXTLoad(Arg.Val))
return SDOperand();
for (unsigned i = 0; i < NumElems; ++i) {
SDOperand Elt = PermMask.getOperand(i);
if (Elt.getOpcode() == ISD::UNDEF) {
if (!Base)
Base = Arg.Val;
else if (!isConsecutiveLoad(Arg.Val, Base,
i, MVT::getSizeInBits(EVT)/8,MFI))
return SDOperand();
continue;
}
unsigned Idx = cast<ConstantSDNode>(Elt)->getValue();
SDOperand Arg = getShuffleScalarElt(N, Idx, DAG);
if (!Arg.Val || !ISD::isNON_EXTLoad(Arg.Val))
return SDOperand();
if (!Base) {
Base = Arg.Val;
continue;
}
if (!isConsecutiveLoad(Arg.Val, Base, i, MVT::getSizeInBits(EVT)/8,MFI))
return SDOperand();
}
bool isAlign16 = isBaseAlignment16(Base->getOperand(1).Val, MFI, Subtarget);
LoadSDNode *LD = cast<LoadSDNode>(Base);
if (isAlign16) {
if (isBaseAlignment16(Base->getOperand(1).Val, MFI, Subtarget))
return DAG.getLoad(VT, LD->getChain(), LD->getBasePtr(), LD->getSrcValue(),
LD->getSrcValueOffset(), LD->isVolatile());
} else {
return DAG.getLoad(VT, LD->getChain(), LD->getBasePtr(), LD->getSrcValue(),
LD->getSrcValueOffset(), LD->isVolatile(),
LD->getAlignment());
}
return DAG.getLoad(VT, LD->getChain(), LD->getBasePtr(), LD->getSrcValue(),
LD->getSrcValueOffset(), LD->isVolatile(),
LD->getAlignment());
}
/// PerformSELECTCombine - Do target-specific dag combines on SELECT nodes.