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Add suport for VASTART on Mips.

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llvm-svn: 95506
This commit is contained in:
Bruno Cardoso Lopes 2010-02-06 21:00:02 +00:00
parent 2f4294068f
commit 014f8fc7b1
2 changed files with 22 additions and 0 deletions
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19
lib/Target/Mips/MipsISelLowering.cpp
View File

@ -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;
}
}

3
lib/Target/Mips/MipsISelLowering.h
View File

@ -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,