diff options
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 25 |
1 files changed, 8 insertions, 17 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp index 2a01a17b03b..30259c170c4 100644 --- a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -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) - 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::visitMULO(SDNode *N) { + bool IsSigned = (ISD::SMULO == N->getOpcode()); -SDValue DAGCombiner::visitUMULO(SDNode *N) { - // (umulo x, 2) -> (uaddo x, x) + // (mulo x, 2) -> (addo 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(); } |
