Changes in directory llvm/lib/CodeGen/SelectionDAG:
LegalizeDAG.cpp updated: 1.261 -> 1.262 --- Log message: If a target specified a stack pointer with setStackPointerRegisterToSaveRestore, lower STACKSAVE/STACKRESTORE into a copy from/to that register. --- Diffs of the changes: (+21 -5) LegalizeDAG.cpp | 26 +++++++++++++++++++++----- 1 files changed, 21 insertions(+), 5 deletions(-) Index: llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp diff -u llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp:1.261 llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp:1.262 --- llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp:1.261 Thu Jan 12 20:50:02 2006 +++ llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp Fri Jan 13 11:48:44 2006 @@ -1453,10 +1453,20 @@ AddLegalizedOperand(SDOperand(Node, 1), Result.getValue(1)); return Result.getValue(Op.ResNo); case TargetLowering::Expand: - Tmp1 = DAG.getNode(ISD::UNDEF, Node->getValueType(0)); - AddLegalizedOperand(SDOperand(Node, 0), Tmp1); - AddLegalizedOperand(SDOperand(Node, 1), Node->getOperand(0)); - return Op.ResNo ? Node->getOperand(0) : Tmp1; + // Expand to CopyFromReg if the target set + // StackPointerRegisterToSaveRestore. + if (unsigned SP = TLI.getStackPointerRegisterToSaveRestore()) { + Tmp1 = DAG.getCopyFromReg(Node->getOperand(0), SP, + Node->getValueType(0)); + AddLegalizedOperand(SDOperand(Node, 0), Tmp1); + AddLegalizedOperand(SDOperand(Node, 1), Tmp1.getValue(1)); + return Tmp1.getValue(Op.ResNo); + } else { + Tmp1 = DAG.getNode(ISD::UNDEF, Node->getValueType(0)); + AddLegalizedOperand(SDOperand(Node, 0), Tmp1); + AddLegalizedOperand(SDOperand(Node, 1), Node->getOperand(0)); + return Op.ResNo ? Node->getOperand(0) : Tmp1; + } } case ISD::STACKRESTORE: @@ -1478,7 +1488,13 @@ case TargetLowering::Legal: break; case TargetLowering::Expand: - Result = Tmp1; + // Expand to CopyToReg if the target set + // StackPointerRegisterToSaveRestore. + if (unsigned SP = TLI.getStackPointerRegisterToSaveRestore()) { + Result = DAG.getCopyToReg(Tmp1, SP, Tmp2); + } else { + Result = Tmp1; + } break; } break; _______________________________________________ llvm-commits mailing list llvm-commits@cs.uiuc.edu http://lists.cs.uiuc.edu/mailman/listinfo/llvm-commits