diff options
Diffstat (limited to 'lib/CodeGen/SelectionDAG/SelectionDAG.cpp')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/SelectionDAG.cpp | 20 |
1 files changed, 9 insertions, 11 deletions
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp index f8c11456d9..144dc6e198 100644 --- a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp +++ b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp @@ -2302,15 +2302,14 @@ SDValue SelectionDAG::getNode(unsigned Opcode, MVT VT, break; } case ISD::EXTRACT_VECTOR_ELT: - assert(N2C && "Bad EXTRACT_VECTOR_ELT!"); - // EXTRACT_VECTOR_ELT of an UNDEF is an UNDEF. if (N1.getOpcode() == ISD::UNDEF) return getNode(ISD::UNDEF, VT); // EXTRACT_VECTOR_ELT of CONCAT_VECTORS is often formed while lowering is // expanding copies of large vectors from registers. - if (N1.getOpcode() == ISD::CONCAT_VECTORS && + if (N2C && + N1.getOpcode() == ISD::CONCAT_VECTORS && N1.getNumOperands() > 0) { unsigned Factor = N1.getOperand(0).getValueType().getVectorNumElements(); @@ -2321,18 +2320,17 @@ SDValue SelectionDAG::getNode(unsigned Opcode, MVT VT, // EXTRACT_VECTOR_ELT of BUILD_VECTOR is often formed while lowering is // expanding large vector constants. - if (N1.getOpcode() == ISD::BUILD_VECTOR) + if (N2C && N1.getOpcode() == ISD::BUILD_VECTOR) return N1.getOperand(N2C->getValue()); // EXTRACT_VECTOR_ELT of INSERT_VECTOR_ELT is often formed when vector // operations are lowered to scalars. - if (N1.getOpcode() == ISD::INSERT_VECTOR_ELT) - if (ConstantSDNode *IEC = dyn_cast<ConstantSDNode>(N1.getOperand(2))) { - if (IEC == N2C) - return N1.getOperand(1); - else - return getNode(ISD::EXTRACT_VECTOR_ELT, VT, N1.getOperand(0), N2); - } + if (N1.getOpcode() == ISD::INSERT_VECTOR_ELT) { + if (N1.getOperand(2) == N2) + return N1.getOperand(1); + else + return getNode(ISD::EXTRACT_VECTOR_ELT, VT, N1.getOperand(0), N2); + } break; case ISD::EXTRACT_ELEMENT: assert(N2C && (unsigned)N2C->getValue() < 2 && "Bad EXTRACT_ELEMENT!"); |