diff options
Diffstat (limited to 'lib/CodeGen/SelectionDAG/LegalizeDAG.cpp')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/LegalizeDAG.cpp | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp index e1d9836f81..e421317172 100644 --- a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp +++ b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp @@ -1500,6 +1500,9 @@ bool SelectionDAGLegalize::ExpandShift(unsigned Opc, SDOperand Op,SDOperand Amt, } else if (Cst > NVTBits) { Lo = DAG.getConstant(0, NVT); Hi = DAG.getNode(ISD::SHL, NVT, InL, DAG.getConstant(Cst-NVTBits,ShTy)); + } else if (Cst == NVTBits) { + Lo = DAG.getConstant(0, NVT); + Hi = InL; } else { Lo = DAG.getNode(ISD::SHL, NVT, InL, DAG.getConstant(Cst, ShTy)); Hi = DAG.getNode(ISD::OR, NVT, @@ -1514,6 +1517,9 @@ bool SelectionDAGLegalize::ExpandShift(unsigned Opc, SDOperand Op,SDOperand Amt, } else if (Cst > NVTBits) { Lo = DAG.getNode(ISD::SRL, NVT, InH, DAG.getConstant(Cst-NVTBits,ShTy)); Hi = DAG.getConstant(0, NVT); + } else if (Cst == NVTBits) { + Lo = InH; + Hi = DAG.getConstant(0, NVT); } else { Lo = DAG.getNode(ISD::OR, NVT, DAG.getNode(ISD::SRL, NVT, InL, DAG.getConstant(Cst, ShTy)), @@ -1530,6 +1536,10 @@ bool SelectionDAGLegalize::ExpandShift(unsigned Opc, SDOperand Op,SDOperand Amt, DAG.getConstant(Cst-NVTBits, ShTy)); Hi = DAG.getNode(ISD::SRA, NVT, InH, DAG.getConstant(NVTBits-1, ShTy)); + } else if (Cst == NVTBits) { + Lo = InH; + Hi = DAG.getNode(ISD::SRA, NVT, InH, + DAG.getConstant(NVTBits-1, ShTy)); } else { Lo = DAG.getNode(ISD::OR, NVT, DAG.getNode(ISD::SRL, NVT, InL, DAG.getConstant(Cst, ShTy)), |