diff options
Diffstat (limited to 'llvm/lib/CodeGen')
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp index 79037d3020f..f09fa625006 100644 --- a/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp @@ -703,7 +703,9 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) { } else { // Make sure the condition is either zero or one. It may have been // promoted from something else. - Tmp2 = DAG.getZeroExtendInReg(Tmp2, MVT::i1); + unsigned NumBits = MVT::getSizeInBits(Tmp2.getValueType()); + if (!TLI.MaskedValueIsZero(Tmp2, (~0ULL >> (64-NumBits))^1)) + Tmp2 = DAG.getZeroExtendInReg(Tmp2, MVT::i1); Result = DAG.getNode(ISD::BR_CC, MVT::Other, Tmp1, DAG.getCondCode(ISD::SETNE), Tmp2, |
