diff options
Diffstat (limited to 'lib/CodeGen/SelectionDAG/LegalizeDAG.cpp')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/LegalizeDAG.cpp | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp index 3a956d0f9b..fc14b062aa 100644 --- a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp +++ b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp @@ -4349,12 +4349,14 @@ void SelectionDAGLegalize::ExpandOp(SDOperand Op, SDOperand &Lo, SDOperand &Hi){ case ISD::SIGN_EXTEND_INREG: ExpandOp(Node->getOperand(0), Lo, Hi); - // Sign extend the lo-part. + // sext_inreg the low part if needed. + Lo = DAG.getNode(ISD::SIGN_EXTEND_INREG, NVT, Lo, Node->getOperand(1)); + + // The high part gets the sign extension from the lo-part. This handles + // things like sextinreg V:i64 from i8. Hi = DAG.getNode(ISD::SRA, NVT, Lo, DAG.getConstant(MVT::getSizeInBits(NVT)-1, TLI.getShiftAmountTy())); - // sext_inreg the low part if needed. - Lo = DAG.getNode(ISD::SIGN_EXTEND_INREG, NVT, Lo, Node->getOperand(1)); break; case ISD::BSWAP: { |