diff options
Diffstat (limited to 'llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 22 |
1 files changed, 18 insertions, 4 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp index ab07954a6f1..1df041dcdd0 100644 --- a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -10390,10 +10390,24 @@ SDValue DAGCombiner::visitCONCAT_VECTORS(SDNode *N) { SmallVector<SDValue, 8> Opnds; unsigned BuildVecNumElts = N0.getNumOperands(); - for (unsigned i = 0; i != BuildVecNumElts; ++i) - Opnds.push_back(N0.getOperand(i)); - for (unsigned i = 0; i != BuildVecNumElts; ++i) - Opnds.push_back(N1.getOperand(i)); + EVT SclTy0 = N0.getOperand(0)->getValueType(0); + EVT SclTy1 = N1.getOperand(0)->getValueType(0); + if (SclTy0.isFloatingPoint()) { + for (unsigned i = 0; i != BuildVecNumElts; ++i) + Opnds.push_back(N0.getOperand(i)); + for (unsigned i = 0; i != BuildVecNumElts; ++i) + Opnds.push_back(N1.getOperand(i)); + } else { + // If BUILD_VECTOR are from built from integer, they may have different + // operand types. Get the smaller type and truncate all operands to it. + EVT MinTy = SclTy0.bitsLE(SclTy1) ? SclTy0 : SclTy1; + for (unsigned i = 0; i != BuildVecNumElts; ++i) + Opnds.push_back(DAG.getNode(ISD::TRUNCATE, SDLoc(N), MinTy, + N0.getOperand(i))); + for (unsigned i = 0; i != BuildVecNumElts; ++i) + Opnds.push_back(DAG.getNode(ISD::TRUNCATE, SDLoc(N), MinTy, + N1.getOperand(i))); + } return DAG.getNode(ISD::BUILD_VECTOR, SDLoc(N), VT, Opnds); } |
