diff options
| -rw-r--r-- | llvm/lib/Target/Mips/MipsISelLowering.cpp | 19 | ||||
| -rw-r--r-- | llvm/lib/Target/Mips/MipsISelLowering.h | 3 |
2 files changed, 22 insertions, 0 deletions
diff --git a/llvm/lib/Target/Mips/MipsISelLowering.cpp b/llvm/lib/Target/Mips/MipsISelLowering.cpp index b77b91f6eeb..d94944fb373 100644 --- a/llvm/lib/Target/Mips/MipsISelLowering.cpp +++ b/llvm/lib/Target/Mips/MipsISelLowering.cpp @@ -97,6 +97,8 @@ MipsTargetLowering(MipsTargetMachine &TM) setOperationAction(ISD::BRCOND, MVT::Other, Custom); setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32, Custom); setOperationAction(ISD::FP_TO_SINT, MVT::i32, Custom); + setOperationAction(ISD::VASTART, MVT::Other, Custom); + // We custom lower AND/OR to handle the case where the DAG contain 'ands/ors' // with operands comming from setcc fp comparions. This is necessary since @@ -179,6 +181,7 @@ LowerOperation(SDValue Op, SelectionDAG &DAG) case ISD::OR: return LowerANDOR(Op, DAG); case ISD::SELECT: return LowerSELECT(Op, DAG); case ISD::SETCC: return LowerSETCC(Op, DAG); + case ISD::VASTART: return LowerVASTART(Op, DAG); } return SDValue(); } @@ -591,6 +594,16 @@ LowerConstantPool(SDValue Op, SelectionDAG &DAG) return ResNode; } +SDValue MipsTargetLowering::LowerVASTART(SDValue Op, SelectionDAG &DAG) { + DebugLoc dl = Op.getDebugLoc(); + SDValue FI = DAG.getFrameIndex(VarArgsFrameIndex, getPointerTy()); + + // vastart just stores the address of the VarArgsFrameIndex slot into the + // memory location argument. + const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue(); + return DAG.getStore(Op.getOperand(0), dl, FI, Op.getOperand(1), SV, 0); +} + //===----------------------------------------------------------------------===// // Calling Convention Implementation //===----------------------------------------------------------------------===// @@ -984,6 +997,7 @@ MipsTargetLowering::LowerFormalArguments(SDValue Chain, MipsFunctionInfo *MipsFI = MF.getInfo<MipsFunctionInfo>(); unsigned StackReg = MF.getTarget().getRegisterInfo()->getFrameRegister(MF); + VarArgsFrameIndex = 0; // Used with vargs to acumulate store chains. std::vector<SDValue> OutChains; @@ -1119,6 +1133,11 @@ MipsTargetLowering::LowerFormalArguments(SDValue Chain, MipsFI->recordStoreVarArgsFI(FI, -(4+(StackLoc*4))); SDValue PtrOff = DAG.getFrameIndex(FI, getPointerTy()); OutChains.push_back(DAG.getStore(Chain, dl, ArgValue, PtrOff, NULL, 0)); + + // Record the frame index of the first variable argument + // which is a value necessary to VASTART. + if (!VarArgsFrameIndex) + VarArgsFrameIndex = FI; } } diff --git a/llvm/lib/Target/Mips/MipsISelLowering.h b/llvm/lib/Target/Mips/MipsISelLowering.h index d8b453ceb25..7256617242f 100644 --- a/llvm/lib/Target/Mips/MipsISelLowering.h +++ b/llvm/lib/Target/Mips/MipsISelLowering.h @@ -68,6 +68,8 @@ namespace llvm { //===--------------------------------------------------------------------===// class MipsTargetLowering : public TargetLowering { + int VarArgsFrameIndex; // FrameIndex for start of varargs area. + public: explicit MipsTargetLowering(MipsTargetMachine &TM); @@ -107,6 +109,7 @@ namespace llvm { SDValue LowerJumpTable(SDValue Op, SelectionDAG &DAG); SDValue LowerSELECT(SDValue Op, SelectionDAG &DAG); SDValue LowerSETCC(SDValue Op, SelectionDAG &DAG); + SDValue LowerVASTART(SDValue Op, SelectionDAG &DAG); virtual SDValue LowerFormalArguments(SDValue Chain, |
