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[DAGCombine] Merge visitSMULO+visitUMULO into visitMULO. NFCI. 

llvm-svn: 355690
This commit is contained in:
Simon Pilgrim 2019-03-08 11:41:18 +00:00
parent c71d6d157f
commit 04e8439f72
1 changed files with 9 additions and 18 deletions
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27
llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
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@ -315,8 +315,7 @@ namespace {
SDValue visitMULHS(SDNode *N);
SDValue visitSMUL_LOHI(SDNode *N);
SDValue visitUMUL_LOHI(SDNode *N);
SDValue visitSMULO(SDNode *N);
SDValue visitUMULO(SDNode *N);
SDValue visitMULO(SDNode *N);
SDValue visitIMINMAX(SDNode *N);
SDValue visitAND(SDNode *N);
SDValue visitANDLike(SDValue N0, SDValue N1, SDNode *N);
@ -1510,8 +1509,8 @@ SDValue DAGCombiner::visit(SDNode *N) {
case ISD::MULHS: return visitMULHS(N);
case ISD::SMUL_LOHI: return visitSMUL_LOHI(N);
case ISD::UMUL_LOHI: return visitUMUL_LOHI(N);
case ISD::SMULO: return visitSMULO(N);
case ISD::UMULO: return visitUMULO(N);
case ISD::SMULO:
case ISD::UMULO: return visitMULO(N);
case ISD::SMIN:
case ISD::SMAX:
case ISD::UMIN:
@ -3806,22 +3805,14 @@ SDValue DAGCombiner::visitUMUL_LOHI(SDNode *N) {
return SDValue();
}
SDValue DAGCombiner::visitSMULO(SDNode *N) {
// (smulo x, 2) -> (saddo x, x)
SDValue DAGCombiner::visitMULO(SDNode *N) {
bool IsSigned = (ISD::SMULO == N->getOpcode());
// (mulo x, 2) -> (addo x, x)
if (ConstantSDNode *C2 = isConstOrConstSplat(N->getOperand(1)))
if (C2->getAPIntValue() == 2)
return DAG.getNode(ISD::SADDO, SDLoc(N), N->getVTList(),
N->getOperand(0), N->getOperand(0));
return SDValue();
}
SDValue DAGCombiner::visitUMULO(SDNode *N) {
// (umulo x, 2) -> (uaddo x, x)
if (ConstantSDNode *C2 = isConstOrConstSplat(N->getOperand(1)))
if (C2->getAPIntValue() == 2)
return DAG.getNode(ISD::UADDO, SDLoc(N), N->getVTList(),
N->getOperand(0), N->getOperand(0));
return DAG.getNode(IsSigned ? ISD::SADDO : ISD::UADDO, SDLoc(N),
N->getVTList(), N->getOperand(0), N->getOperand(0));
return SDValue();
}