//
// The LLVM Compiler Infrastructure
//
-// This file was developed by Duraid Madina and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/SelectionDAG.h"
-#include "llvm/CodeGen/SSARegMap.h"
+#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/Constants.h"
#include "llvm/Function.h"
using namespace llvm;
// register class for predicate registers
addRegisterClass(MVT::i1, IA64::PRRegisterClass);
- setOperationAction(ISD::BRCONDTWOWAY , MVT::Other, Expand);
- setOperationAction(ISD::BRTWOWAY_CC , MVT::Other, Expand);
- setOperationAction(ISD::FP_ROUND_INREG , MVT::f32 , Expand);
+ setLoadXAction(ISD::EXTLOAD , MVT::i1 , Promote);
- setSetCCResultType(MVT::i1);
- setShiftAmountType(MVT::i64);
+ setLoadXAction(ISD::ZEXTLOAD , MVT::i1 , Promote);
- setOperationAction(ISD::EXTLOAD , MVT::i1 , Promote);
+ setLoadXAction(ISD::SEXTLOAD , MVT::i1 , Promote);
+ setLoadXAction(ISD::SEXTLOAD , MVT::i8 , Expand);
+ setLoadXAction(ISD::SEXTLOAD , MVT::i16 , Expand);
+ setLoadXAction(ISD::SEXTLOAD , MVT::i32 , Expand);
- setOperationAction(ISD::ZEXTLOAD , MVT::i1 , Expand);
+ setOperationAction(ISD::BRIND , MVT::Other, Expand);
+ setOperationAction(ISD::BR_JT , MVT::Other, Expand);
+ setOperationAction(ISD::BR_CC , MVT::Other, Expand);
+ setOperationAction(ISD::FP_ROUND_INREG , MVT::f32 , Expand);
- setOperationAction(ISD::SEXTLOAD , MVT::i1 , Expand);
- setOperationAction(ISD::SEXTLOAD , MVT::i8 , Expand);
- setOperationAction(ISD::SEXTLOAD , MVT::i16 , Expand);
- setOperationAction(ISD::SEXTLOAD , MVT::i32 , Expand);
+ // ia64 uses SELECT not SELECT_CC
+ setOperationAction(ISD::SELECT_CC , MVT::Other, Expand);
+
+ // We need to handle ISD::RET for void functions ourselves,
+ // so we get a chance to restore ar.pfs before adding a
+ // br.ret insn
+ setOperationAction(ISD::RET, MVT::Other, Custom);
+
+ setSetCCResultType(MVT::i1);
+ setShiftAmountType(MVT::i64);
setOperationAction(ISD::FREM , MVT::f32 , Expand);
setOperationAction(ISD::FREM , MVT::f64 , Expand);
setOperationAction(ISD::MEMMOVE , MVT::Other, Expand);
setOperationAction(ISD::MEMSET , MVT::Other, Expand);
setOperationAction(ISD::MEMCPY , MVT::Other, Expand);
-
+ setOperationAction(ISD::MEMBARRIER , MVT::Other, Expand);
+
setOperationAction(ISD::SINT_TO_FP , MVT::i1 , Promote);
setOperationAction(ISD::UINT_TO_FP , MVT::i1 , Promote);
- // We don't support sin/cos/sqrt
+ // We don't support sin/cos/sqrt/pow
setOperationAction(ISD::FSIN , MVT::f64, Expand);
setOperationAction(ISD::FCOS , MVT::f64, Expand);
setOperationAction(ISD::FSQRT, MVT::f64, Expand);
+ setOperationAction(ISD::FPOW , MVT::f64, Expand);
setOperationAction(ISD::FSIN , MVT::f32, Expand);
setOperationAction(ISD::FCOS , MVT::f32, Expand);
setOperationAction(ISD::FSQRT, MVT::f32, Expand);
+ setOperationAction(ISD::FPOW , MVT::f32, Expand);
+ // FIXME: IA64 supports fcopysign natively!
+ setOperationAction(ISD::FCOPYSIGN, MVT::f64, Expand);
+ setOperationAction(ISD::FCOPYSIGN, MVT::f32, Expand);
+
// We don't have line number support yet.
setOperationAction(ISD::LOCATION, MVT::Other, Expand);
setOperationAction(ISD::DEBUG_LOC, MVT::Other, Expand);
- setOperationAction(ISD::DEBUG_LABEL, MVT::Other, Expand);
+ setOperationAction(ISD::LABEL, MVT::Other, Expand);
//IA64 has these, but they are not implemented
setOperationAction(ISD::CTTZ , MVT::i64 , Expand);
setOperationAction(ISD::ROTR , MVT::i64 , Expand);
setOperationAction(ISD::BSWAP, MVT::i64 , Expand); // mux @rev
- // Not implemented yet.
+ // VASTART needs to be custom lowered to use the VarArgsFrameIndex
+ setOperationAction(ISD::VAARG , MVT::Other, Custom);
+ setOperationAction(ISD::VASTART , MVT::Other, Custom);
+
+ // Use the default implementation.
+ setOperationAction(ISD::VACOPY , MVT::Other, Expand);
+ setOperationAction(ISD::VAEND , MVT::Other, Expand);
setOperationAction(ISD::STACKSAVE, MVT::Other, Expand);
setOperationAction(ISD::STACKRESTORE, MVT::Other, Expand);
+ setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i64, Expand);
+ setOperationAction(ISD::PREFETCH , MVT::Other, Expand);
+
+ // Thread Local Storage
+ setOperationAction(ISD::GlobalTLSAddress, MVT::i64, Custom);
+
+ setStackPointerRegisterToSaveRestore(IA64::r12);
+ setJumpBufSize(704); // on ia64-linux, jmp_bufs are 704 bytes..
+ setJumpBufAlignment(16); // ...and must be 16-byte aligned
+
computeRegisterProperties();
- addLegalFPImmediate(+0.0);
- addLegalFPImmediate(+1.0);
+ addLegalFPImmediate(APFloat(+0.0));
+ addLegalFPImmediate(APFloat(-0.0));
+ addLegalFPImmediate(APFloat(+1.0));
+ addLegalFPImmediate(APFloat(-1.0));
}
-/// isFloatingPointZero - Return true if this is 0.0 or -0.0.
-static bool isFloatingPointZero(SDOperand Op) {
- if (ConstantFPSDNode *CFP = dyn_cast<ConstantFPSDNode>(Op))
- return CFP->isExactlyValue(-0.0) || CFP->isExactlyValue(0.0);
- else if (Op.getOpcode() == ISD::EXTLOAD || Op.getOpcode() == ISD::LOAD) {
- // Maybe this has already been legalized into the constant pool?
- if (ConstantPoolSDNode *CP = dyn_cast<ConstantPoolSDNode>(Op.getOperand(1)))
- if (ConstantFP *CFP = dyn_cast<ConstantFP>(CP->get()))
- return CFP->isExactlyValue(-0.0) || CFP->isExactlyValue(0.0);
+const char *IA64TargetLowering::getTargetNodeName(unsigned Opcode) const {
+ switch (Opcode) {
+ default: return 0;
+ case IA64ISD::GETFD: return "IA64ISD::GETFD";
+ case IA64ISD::BRCALL: return "IA64ISD::BRCALL";
+ case IA64ISD::RET_FLAG: return "IA64ISD::RET_FLAG";
}
- return false;
}
+
std::vector<SDOperand>
IA64TargetLowering::LowerArguments(Function &F, SelectionDAG &DAG) {
//
MachineFunction &MF = DAG.getMachineFunction();
MachineFrameInfo *MFI = MF.getFrameInfo();
+ const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
- GP = MF.getSSARegMap()->createVirtualRegister(getRegClassFor(MVT::i64));
- SP = MF.getSSARegMap()->createVirtualRegister(getRegClassFor(MVT::i64));
- RP = MF.getSSARegMap()->createVirtualRegister(getRegClassFor(MVT::i64));
+ GP = MF.getRegInfo().createVirtualRegister(getRegClassFor(MVT::i64));
+ SP = MF.getRegInfo().createVirtualRegister(getRegClassFor(MVT::i64));
+ RP = MF.getRegInfo().createVirtualRegister(getRegClassFor(MVT::i64));
MachineBasicBlock& BB = MF.front();
// see intel ABI docs)
case MVT::f64:
//XXX BuildMI(&BB, IA64::IDEF, 0, args_FP[used_FPArgs]);
- MF.addLiveIn(args_FP[used_FPArgs]); // mark this reg as liveIn
+ MF.getRegInfo().addLiveIn(args_FP[used_FPArgs]);
+ // mark this reg as liveIn
// floating point args go into f8..f15 as-needed, the increment
argVreg[count] = // is below..:
- MF.getSSARegMap()->createVirtualRegister(getRegClassFor(MVT::f64));
+ MF.getRegInfo().createVirtualRegister(getRegClassFor(MVT::f64));
// FP args go into f8..f15 as needed: (hence the ++)
argPreg[count] = args_FP[used_FPArgs++];
argOpc[count] = IA64::FMOV;
argt = newroot = DAG.getCopyFromReg(DAG.getRoot(), argVreg[count],
MVT::f64);
if (I->getType() == Type::FloatTy)
- argt = DAG.getNode(ISD::FP_ROUND, MVT::f32, argt);
+ argt = DAG.getNode(ISD::FP_ROUND, MVT::f32, argt,
+ DAG.getIntPtrConstant(0));
break;
case MVT::i1: // NOTE: as far as C abi stuff goes,
// bools are just boring old ints
case MVT::i32:
case MVT::i64:
//XXX BuildMI(&BB, IA64::IDEF, 0, args_int[count]);
- MF.addLiveIn(args_int[count]); // mark this register as liveIn
+ MF.getRegInfo().addLiveIn(args_int[count]);
+ // mark this register as liveIn
argVreg[count] =
- MF.getSSARegMap()->createVirtualRegister(getRegClassFor(MVT::i64));
+ MF.getRegInfo().createVirtualRegister(getRegClassFor(MVT::i64));
argPreg[count] = args_int[count];
argOpc[count] = IA64::MOV;
argt = newroot =
//from this parameter
SDOperand FIN = DAG.getFrameIndex(FI, MVT::i64);
argt = newroot = DAG.getLoad(getValueType(I->getType()),
- DAG.getEntryNode(), FIN, DAG.getSrcValue(NULL));
+ DAG.getEntryNode(), FIN, NULL, 0);
}
++count;
DAG.setRoot(newroot.getValue(1));
// Create a vreg to hold the output of (what will become)
// the "alloc" instruction
- VirtGPR = MF.getSSARegMap()->createVirtualRegister(getRegClassFor(MVT::i64));
- BuildMI(&BB, IA64::PSEUDO_ALLOC, 0, VirtGPR);
+ VirtGPR = MF.getRegInfo().createVirtualRegister(getRegClassFor(MVT::i64));
+ BuildMI(&BB, TII->get(IA64::PSEUDO_ALLOC), VirtGPR);
// we create a PSEUDO_ALLOC (pseudo)instruction for now
/*
BuildMI(&BB, IA64::IDEF, 0, IA64::r1);
// here we actually do the moving of args, and store them to the stack
// too if this is a varargs function:
for (int i = 0; i < count && i < 8; ++i) {
- BuildMI(&BB, argOpc[i], 1, argVreg[i]).addReg(argPreg[i]);
+ BuildMI(&BB, TII->get(argOpc[i]), argVreg[i]).addReg(argPreg[i]);
if(F.isVarArg()) {
// if this is a varargs function, we copy the input registers to the stack
int FI = MFI->CreateFixedObject(8, tempOffset);
tempOffset+=8; //XXX: is it safe to use r22 like this?
- BuildMI(&BB, IA64::MOV, 1, IA64::r22).addFrameIndex(FI);
+ BuildMI(&BB, TII->get(IA64::MOV), IA64::r22).addFrameIndex(FI);
// FIXME: we should use st8.spill here, one day
- BuildMI(&BB, IA64::ST8, 1, IA64::r22).addReg(argPreg[i]);
+ BuildMI(&BB, TII->get(IA64::ST8), IA64::r22).addReg(argPreg[i]);
}
}
case MVT::i16:
case MVT::i32:
case MVT::i64:
- MF.addLiveOut(IA64::r8);
+ MF.getRegInfo().addLiveOut(IA64::r8);
break;
case MVT::f32:
case MVT::f64:
- MF.addLiveOut(IA64::F8);
+ MF.getRegInfo().addLiveOut(IA64::F8);
break;
}
}
std::pair<SDOperand, SDOperand>
-IA64TargetLowering::LowerCallTo(SDOperand Chain,
- const Type *RetTy, bool isVarArg,
- unsigned CallingConv, bool isTailCall,
- SDOperand Callee, ArgListTy &Args,
- SelectionDAG &DAG) {
+IA64TargetLowering::LowerCallTo(SDOperand Chain, const Type *RetTy,
+ bool RetSExt, bool RetZExt,
+ bool isVarArg, unsigned CallingConv,
+ bool isTailCall, SDOperand Callee,
+ ArgListTy &Args, SelectionDAG &DAG) {
MachineFunction &MF = DAG.getMachineFunction();
std::max(outRegsUsed, MF.getInfo<IA64FunctionInfo>()->outRegsUsed);
// keep stack frame 16-byte aligned
- //assert(NumBytes==((NumBytes+15) & ~15) && "stack frame not 16-byte aligned!");
+ // assert(NumBytes==((NumBytes+15) & ~15) &&
+ // "stack frame not 16-byte aligned!");
NumBytes = (NumBytes+15) & ~15;
- Chain = DAG.getNode(ISD::CALLSEQ_START, MVT::Other, Chain,
- DAG.getConstant(NumBytes, getPointerTy()));
+ Chain = DAG.getCALLSEQ_START(Chain,DAG.getConstant(NumBytes, getPointerTy()));
- SDOperand StackPtr, NullSV;
+ SDOperand StackPtr;
std::vector<SDOperand> Stores;
std::vector<SDOperand> Converts;
std::vector<SDOperand> RegValuesToPass;
for (unsigned i = 0, e = Args.size(); i != e; ++i)
{
- SDOperand Val = Args[i].first;
+ SDOperand Val = Args[i].Node;
MVT::ValueType ObjectVT = Val.getValueType();
SDOperand ValToStore(0, 0), ValToConvert(0, 0);
unsigned ObjSize=8;
case MVT::i1:
case MVT::i8:
case MVT::i16:
- case MVT::i32:
+ case MVT::i32: {
//promote to 64-bits, sign/zero extending based on type
//of the argument
- if(Args[i].second->isSigned())
- Val = DAG.getNode(ISD::SIGN_EXTEND, MVT::i64, Val);
- else
- Val = DAG.getNode(ISD::ZERO_EXTEND, MVT::i64, Val);
+ ISD::NodeType ExtendKind = ISD::ANY_EXTEND;
+ if (Args[i].isSExt)
+ ExtendKind = ISD::SIGN_EXTEND;
+ else if (Args[i].isZExt)
+ ExtendKind = ISD::ZERO_EXTEND;
+ Val = DAG.getNode(ExtendKind, MVT::i64, Val);
// XXX: fall through
+ }
case MVT::i64:
//ObjSize = 8;
if(RegValuesToPass.size() >= 8) {
ValToStore = Val;
} else {
RegValuesToPass.push_back(Val);
- if(1 /* TODO: if(calling external or varadic function)*/ ) {
- ValToConvert = Val; // additionally pass this FP value as an int
- }
+ if(1 /* TODO: if(calling external or varadic function)*/ ) {
+ ValToConvert = Val; // additionally pass this FP value as an int
+ }
}
break;
}
if(ValToStore.Val) {
if(!StackPtr.Val) {
StackPtr = DAG.getRegister(IA64::r12, MVT::i64);
- NullSV = DAG.getSrcValue(NULL);
}
SDOperand PtrOff = DAG.getConstant(ArgOffset, getPointerTy());
PtrOff = DAG.getNode(ISD::ADD, MVT::i64, StackPtr, PtrOff);
- Stores.push_back(DAG.getNode(ISD::STORE, MVT::Other, Chain,
- ValToStore, PtrOff, NullSV));
+ Stores.push_back(DAG.getStore(Chain, ValToStore, PtrOff, NULL, 0));
ArgOffset += ObjSize;
}
if(ValToConvert.Val) {
- Converts.push_back(DAG.getNode(IA64ISD::GETFD, MVT::i64, ValToConvert));
+ Converts.push_back(DAG.getNode(IA64ISD::GETFD, MVT::i64, ValToConvert));
}
}
// Emit all stores, make sure they occur before any copies into physregs.
if (!Stores.empty())
- Chain = DAG.getNode(ISD::TokenFactor, MVT::Other, Stores);
+ Chain = DAG.getNode(ISD::TokenFactor, MVT::Other, &Stores[0],Stores.size());
static const unsigned IntArgRegs[] = {
IA64::out0, IA64::out1, IA64::out2, IA64::out3,
unsigned seenConverts = 0;
for (unsigned i = 0, e = RegValuesToPass.size(); i != e; ++i) {
if(MVT::isFloatingPoint(RegValuesToPass[i].getValueType())) {
- Chain = DAG.getCopyToReg(Chain, IntArgRegs[i], Converts[seenConverts++], InFlag);
+ Chain = DAG.getCopyToReg(Chain, IntArgRegs[i], Converts[seenConverts++],
+ InFlag);
InFlag = Chain.getValue(1);
}
}
for (unsigned i = 0, e = RegValuesToPass.size(); i != e; ++i) {
Chain = DAG.getCopyToReg(Chain,
MVT::isInteger(RegValuesToPass[i].getValueType()) ?
- IntArgRegs[i] : FPArgRegs[usedFPArgs++],
- RegValuesToPass[i], InFlag);
+ IntArgRegs[i] : FPArgRegs[usedFPArgs++], RegValuesToPass[i], InFlag);
InFlag = Chain.getValue(1);
}
else
assert(0 && "this should never happen!\n");
-/* out with the old...
- Chain = SDOperand(DAG.getCall(NodeTys, Chain, Callee, InFlag), 0);
- else
- Chain = SDOperand(DAG.getCall(NodeTys, Chain, Callee), 0);
-*/
// to make way for a hack:
- Chain = DAG.getNode(IA64ISD::BRCALL, NodeTys, CallOperands);
+ Chain = DAG.getNode(IA64ISD::BRCALL, NodeTys,
+ &CallOperands[0], CallOperands.size());
InFlag = Chain.getValue(1);
// restore the GP, SP and RP after the call
SDOperand RetVal;
if (RetTyVT != MVT::isVoid) {
switch (RetTyVT) {
- default: // assert(0 && "Unknown value type to return!");
+ default: assert(0 && "Unknown value type to return!");
case MVT::i1: { // bools are just like other integers (returned in r8)
- SDOperand boolInR8 = DAG.getCopyFromReg(Chain, IA64::r8, MVT::i64, InFlag);
+ // we *could* fall through to the truncate below, but this saves a
+ // few redundant predicate ops
+ SDOperand boolInR8 = DAG.getCopyFromReg(Chain, IA64::r8, MVT::i64,InFlag);
InFlag = boolInR8.getValue(2);
Chain = boolInR8.getValue(1);
SDOperand zeroReg = DAG.getCopyFromReg(Chain, IA64::r0, MVT::i64, InFlag);
InFlag = zeroReg.getValue(2);
- Chain = zeroReg.getValue(1);
+ Chain = zeroReg.getValue(1);
RetVal = DAG.getSetCC(MVT::i1, boolInR8, zeroReg, ISD::SETNE);
break;
RetVal = DAG.getCopyFromReg(Chain, IA64::r8, MVT::i64, InFlag);
Chain = RetVal.getValue(1);
- // Add a note to keep track of whether it is sign or zero extended - TODO: bools
+ // keep track of whether it is sign or zero extended (todo: bools?)
+/* XXX
RetVal = DAG.getNode(RetTy->isSigned() ? ISD::AssertSext :ISD::AssertZext,
MVT::i64, RetVal, DAG.getValueType(RetTyVT));
+*/
RetVal = DAG.getNode(ISD::TRUNCATE, RetTyVT, RetVal);
break;
case MVT::i64:
Chain = RetVal.getValue(1);
InFlag = RetVal.getValue(2); // XXX dead
break;
+ case MVT::f32:
+ RetVal = DAG.getCopyFromReg(Chain, IA64::F8, MVT::f64, InFlag);
+ Chain = RetVal.getValue(1);
+ RetVal = DAG.getNode(ISD::TRUNCATE, MVT::f32, RetVal);
+ break;
case MVT::f64:
RetVal = DAG.getCopyFromReg(Chain, IA64::F8, MVT::f64, InFlag);
Chain = RetVal.getValue(1);
}
}
- Chain = DAG.getNode(ISD::CALLSEQ_END, MVT::Other, Chain,
- DAG.getConstant(NumBytes, getPointerTy()));
-
+ Chain = DAG.getCALLSEQ_END(Chain,
+ DAG.getConstant(NumBytes, getPointerTy()),
+ DAG.getConstant(0, getPointerTy()),
+ SDOperand());
return std::make_pair(RetVal, Chain);
}
-SDOperand
-IA64TargetLowering::LowerVAStart(SDOperand Chain, SDOperand VAListP,
- Value *VAListV, SelectionDAG &DAG) {
- // vastart just stores the address of the VarArgsFrameIndex slot.
- SDOperand FR = DAG.getFrameIndex(VarArgsFrameIndex, MVT::i64);
- return DAG.getNode(ISD::STORE, MVT::Other, Chain, FR,
- VAListP, DAG.getSrcValue(VAListV));
-}
-
-std::pair<SDOperand,SDOperand> IA64TargetLowering::
-LowerVAArg(SDOperand Chain, SDOperand VAListP, Value *VAListV,
- const Type *ArgTy, SelectionDAG &DAG) {
-
- MVT::ValueType ArgVT = getValueType(ArgTy);
- SDOperand Val = DAG.getLoad(MVT::i64, Chain,
- VAListP, DAG.getSrcValue(VAListV));
- SDOperand Result = DAG.getLoad(ArgVT, DAG.getEntryNode(), Val,
- DAG.getSrcValue(NULL));
- unsigned Amt;
- if (ArgVT == MVT::i32 || ArgVT == MVT::f32)
- Amt = 8;
- else {
- assert((ArgVT == MVT::i64 || ArgVT == MVT::f64) &&
- "Other types should have been promoted for varargs!");
- Amt = 8;
+SDOperand IA64TargetLowering::
+LowerOperation(SDOperand Op, SelectionDAG &DAG) {
+ switch (Op.getOpcode()) {
+ default: assert(0 && "Should not custom lower this!");
+ case ISD::GlobalTLSAddress:
+ assert(0 && "TLS not implemented for IA64.");
+ case ISD::RET: {
+ SDOperand AR_PFSVal, Copy;
+
+ switch(Op.getNumOperands()) {
+ default:
+ assert(0 && "Do not know how to return this many arguments!");
+ abort();
+ case 1:
+ AR_PFSVal = DAG.getCopyFromReg(Op.getOperand(0), VirtGPR, MVT::i64);
+ AR_PFSVal = DAG.getCopyToReg(AR_PFSVal.getValue(1), IA64::AR_PFS,
+ AR_PFSVal);
+ return DAG.getNode(IA64ISD::RET_FLAG, MVT::Other, AR_PFSVal);
+ case 3: {
+ // Copy the result into the output register & restore ar.pfs
+ MVT::ValueType ArgVT = Op.getOperand(1).getValueType();
+ unsigned ArgReg = MVT::isInteger(ArgVT) ? IA64::r8 : IA64::F8;
+
+ AR_PFSVal = DAG.getCopyFromReg(Op.getOperand(0), VirtGPR, MVT::i64);
+ Copy = DAG.getCopyToReg(AR_PFSVal.getValue(1), ArgReg, Op.getOperand(1),
+ SDOperand());
+ AR_PFSVal = DAG.getCopyToReg(Copy.getValue(0), IA64::AR_PFS, AR_PFSVal,
+ Copy.getValue(1));
+ return DAG.getNode(IA64ISD::RET_FLAG, MVT::Other,
+ AR_PFSVal, AR_PFSVal.getValue(1));
+ }
+ }
+ return SDOperand();
}
- Val = DAG.getNode(ISD::ADD, Val.getValueType(), Val,
- DAG.getConstant(Amt, Val.getValueType()));
- Chain = DAG.getNode(ISD::STORE, MVT::Other, Chain,
- Val, VAListP, DAG.getSrcValue(VAListV));
- return std::make_pair(Result, Chain);
-}
-
-
-
-std::pair<SDOperand, SDOperand> IA64TargetLowering::
-LowerFrameReturnAddress(bool isFrameAddress, SDOperand Chain, unsigned Depth,
- SelectionDAG &DAG) {
- assert(0 && "LowerFrameReturnAddress unimplemented");
- abort();
+ case ISD::VAARG: {
+ MVT::ValueType VT = getPointerTy();
+ const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
+ SDOperand VAList = DAG.getLoad(VT, Op.getOperand(0), Op.getOperand(1),
+ SV, 0);
+ // Increment the pointer, VAList, to the next vaarg
+ SDOperand VAIncr = DAG.getNode(ISD::ADD, VT, VAList,
+ DAG.getConstant(MVT::getSizeInBits(VT)/8,
+ VT));
+ // Store the incremented VAList to the legalized pointer
+ VAIncr = DAG.getStore(VAList.getValue(1), VAIncr,
+ Op.getOperand(1), SV, 0);
+ // Load the actual argument out of the pointer VAList
+ return DAG.getLoad(Op.getValueType(), VAIncr, VAList, NULL, 0);
+ }
+ case ISD::VASTART: {
+ // vastart just stores the address of the VarArgsFrameIndex slot into the
+ // memory location argument.
+ SDOperand FR = DAG.getFrameIndex(VarArgsFrameIndex, MVT::i64);
+ const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
+ return DAG.getStore(Op.getOperand(0), FR, Op.getOperand(1), SV, 0);
+ }
+ // Frame & Return address. Currently unimplemented
+ case ISD::RETURNADDR: break;
+ case ISD::FRAMEADDR: break;
+ }
+ return SDOperand();
}
-
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