diff options
Diffstat (limited to 'llvm/lib/CodeGen')
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp index d173a95fcd4..ef0b0769a06 100644 --- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp @@ -612,6 +612,12 @@ SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT, } break; + case ISD::SHL: + case ISD::SRL: + case ISD::SRA: + if (C2 == 0) return N1; + break; + case ISD::AND: if (!C2) return N2; // X and 0 -> 0 if (N2C->isAllOnesValue()) |
