diff options
| -rw-r--r-- | lib/CodeGen/SelectionDAG/SelectionDAG.cpp | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp index a51f79f..7c8a94e 100644 --- a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp +++ b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp @@ -1484,6 +1484,15 @@ SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT, MVT::getVectorNumElements(VT) == N3.getNumOperands() && "Illegal VECTOR_SHUFFLE node!"); break; + case ISD::VBIT_CONVERT: + // Fold vbit_convert nodes from a type to themselves. + if (N1.getValueType() == MVT::Vector) { + assert(isa<ConstantSDNode>(*(N1.Val->op_end()-2)) && + isa<VTSDNode>(*(N1.Val->op_end()-1)) && "Malformed vector input!"); + if (*(N1.Val->op_end()-2) == N2 && *(N1.Val->op_end()-1) == N3) + return N1; + } + break; } // Memoize node if it doesn't produce a flag. |