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Use SDValue bool check. NFCI. 

llvm-svn: 243837
This commit is contained in:
Simon Pilgrim 2015-08-01 17:05:50 +00:00
parent eb35a7b797
commit b447dc5aaa
1 changed files with 10 additions and 20 deletions
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30
llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
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@ -4732,8 +4732,7 @@ SDValue DAGCombiner::visitSRL(SDNode *N) {
// fold (srl x, (trunc (and y, c))) -> (srl x, (and (trunc y), (trunc c))).
if (N1.getOpcode() == ISD::TRUNCATE &&
N1.getOperand(0).getOpcode() == ISD::AND) {
SDValue NewOp1 = distributeTruncateThroughAnd(N1.getNode());
if (NewOp1.getNode())
if (SDValue NewOp1 = distributeTruncateThroughAnd(N1.getNode()))
return DAG.getNode(ISD::SRL, SDLoc(N), VT, N0, NewOp1);
}
@ -4742,15 +4741,12 @@ SDValue DAGCombiner::visitSRL(SDNode *N) {
if (N1C && SimplifyDemandedBits(SDValue(N, 0)))
return SDValue(N, 0);
if (N1C && !N1C->isOpaque()) {
SDValue NewSRL = visitShiftByConstant(N, N1C);
if (NewSRL.getNode())
if (N1C && !N1C->isOpaque())
if (SDValue NewSRL = visitShiftByConstant(N, N1C))
return NewSRL;
}
// Attempt to convert a srl of a load into a narrower zero-extending load.
SDValue NarrowLoad = ReduceLoadWidth(N);
if (NarrowLoad.getNode())
if (SDValue NarrowLoad = ReduceLoadWidth(N))
return NarrowLoad;
// Here is a common situation. We want to optimize:
@ -5511,8 +5507,7 @@ SDValue DAGCombiner::visitVSELECT(SDNode *N) {
if (N1.getOpcode() == ISD::CONCAT_VECTORS &&
N2.getOpcode() == ISD::CONCAT_VECTORS &&
ISD::isBuildVectorOfConstantSDNodes(N0.getNode())) {
SDValue CV = ConvertSelectToConcatVector(N, DAG);
if (CV.getNode())
if (SDValue CV = ConvertSelectToConcatVector(N, DAG))
return CV;
}
@ -6363,8 +6358,7 @@ SDValue DAGCombiner::visitANY_EXTEND(SDNode *N) {
// fold (aext (truncate (load x))) -> (aext (smaller load x))
// fold (aext (truncate (srl (load x), c))) -> (aext (small load (x+c/n)))
if (N0.getOpcode() == ISD::TRUNCATE) {
SDValue NarrowLoad = ReduceLoadWidth(N0.getNode());
if (NarrowLoad.getNode()) {
if (SDValue NarrowLoad = ReduceLoadWidth(N0.getNode())) {
SDNode* oye = N0.getNode()->getOperand(0).getNode();
if (NarrowLoad.getNode() != N0.getNode()) {
CombineTo(N0.getNode(), NarrowLoad);
@ -7984,8 +7978,7 @@ SDValue DAGCombiner::visitFADD(SDNode *N) {
} // enable-unsafe-fp-math
// FADD -> FMA combines:
SDValue Fused = visitFADDForFMACombine(N);
if (Fused) {
if (SDValue Fused = visitFADDForFMACombine(N)) {
AddToWorklist(Fused.getNode());
return Fused;
}
@ -8049,8 +8042,7 @@ SDValue DAGCombiner::visitFSUB(SDNode *N) {
}
// FSUB -> FMA combines:
SDValue Fused = visitFSUBForFMACombine(N);
if (Fused) {
if (SDValue Fused = visitFSUBForFMACombine(N)) {
AddToWorklist(Fused.getNode());
return Fused;
}
@ -9037,8 +9029,7 @@ SDValue DAGCombiner::visitBRCOND(SDNode *N) {
SDValue Op1 = TheXor->getOperand(1);
if (Op0.getOpcode() == Op1.getOpcode()) {
// Avoid missing important xor optimizations.
SDValue Tmp = visitXOR(TheXor);
if (Tmp.getNode()) {
if (SDValue Tmp = visitXOR(TheXor)) {
if (Tmp.getNode() != TheXor) {
DEBUG(dbgs() << "\nReplacing.8 ";
TheXor->dump(&DAG);
@ -11319,8 +11310,7 @@ SDValue DAGCombiner::visitSTORE(SDNode *N) {
// Try transforming a pair floating point load / store ops to integer
// load / store ops.
SDValue NewST = TransformFPLoadStorePair(N);
if (NewST.getNode())
if (SDValue NewST = TransformFPLoadStorePair(N))
return NewST;
bool UseAA = CombinerAA.getNumOccurrences() > 0 ? CombinerAA