diff options
Diffstat (limited to 'llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp index f46b9e84789..78874506f1b 100644 --- a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -16933,12 +16933,15 @@ static SDValue combineShuffleOfScalars(ShuffleVectorSDNode *SVN, SDValue N0 = SVN->getOperand(0); SDValue N1 = SVN->getOperand(1); - if (!N0->hasOneUse() || !N1->hasOneUse()) + if (!N0->hasOneUse()) return SDValue(); // If only one of N1,N2 is constant, bail out if it is not ALL_ZEROS as // discussed above. if (!N1.isUndef()) { + if (!N1->hasOneUse()) + return SDValue(); + bool N0AnyConst = isAnyConstantBuildVector(N0.getNode()); bool N1AnyConst = isAnyConstantBuildVector(N1.getNode()); if (N0AnyConst && !N1AnyConst && !ISD::isBuildVectorAllZeros(N0.getNode())) @@ -17371,7 +17374,7 @@ SDValue DAGCombiner::visitVECTOR_SHUFFLE(SDNode *N) { // Attempt to combine a shuffle of 2 inputs of 'scalar sources' - // BUILD_VECTOR or SCALAR_TO_VECTOR into a single BUILD_VECTOR. - if (Level < AfterLegalizeVectorOps && TLI.isTypeLegal(VT)) + if (Level < AfterLegalizeDAG && TLI.isTypeLegal(VT)) if (SDValue Res = combineShuffleOfScalars(SVN, DAG, TLI)) return Res; |
