diff options
Diffstat (limited to 'llvm/lib/CodeGen/SelectionDAG')
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 4 | ||||
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp | 2 |
2 files changed, 5 insertions, 1 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp index 81bff4d7eef..2b44e4fa93c 100644 --- a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -14200,6 +14200,10 @@ SDValue DAGCombiner::visitEXTRACT_VECTOR_ELT(SDNode *N) { SDValue EltNo = N->getOperand(1); ConstantSDNode *ConstEltNo = dyn_cast<ConstantSDNode>(EltNo); + // extract_vector_elt of out-of-bounds element -> UNDEF + if (ConstEltNo && ConstEltNo->getAPIntValue().uge(VT.getVectorNumElements())) + return DAG.getUNDEF(NVT); + // extract_vector_elt (build_vector x, y), 1 -> y if (ConstEltNo && InVec.getOpcode() == ISD::BUILD_VECTOR && diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp index 4c8b63d2f23..7e99863b1ee 100644 --- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp @@ -4453,7 +4453,7 @@ SDValue SelectionDAG::getNode(unsigned Opcode, const SDLoc &DL, EVT VT, return getUNDEF(VT); // EXTRACT_VECTOR_ELT of out-of-bounds element is an UNDEF - if (N2C && N2C->getZExtValue() >= N1.getValueType().getVectorNumElements()) + if (N2C && N2C->getAPIntValue().uge(N1.getValueType().getVectorNumElements())) return getUNDEF(VT); // EXTRACT_VECTOR_ELT of CONCAT_VECTORS is often formed while lowering is |
