PIC16ISelLowering.cpp [plain text]
#define DEBUG_TYPE "pic16-lower"
#include "PIC16ISelLowering.h"
#include "PIC16TargetMachine.h"
#include "llvm/DerivedTypes.h"
#include "llvm/GlobalValue.h"
#include "llvm/Function.h"
#include "llvm/CallingConv.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include <cstdio>
using namespace llvm;
PIC16TargetLowering::PIC16TargetLowering(PIC16TargetMachine &TM)
: TargetLowering(TM), TmpSize(0) {
Subtarget = &TM.getSubtarget<PIC16Subtarget>();
addRegisterClass(MVT::i8, PIC16::GPRRegisterClass);
setShiftAmountType(MVT::i8);
setShiftAmountFlavor(Extend);
setPIC16LibcallName(PIC16ISD::SRA_I8, "__intrinsics.sra.i8");
setLibcallName(RTLIB::SRA_I16, "__intrinsics.sra.i16");
setLibcallName(RTLIB::SRA_I32, "__intrinsics.sra.i32");
setPIC16LibcallName(PIC16ISD::SLL_I8, "__intrinsics.sll.i8");
setLibcallName(RTLIB::SHL_I16, "__intrinsics.sll.i16");
setLibcallName(RTLIB::SHL_I32, "__intrinsics.sll.i32");
setPIC16LibcallName(PIC16ISD::SRL_I8, "__intrinsics.srl.i8");
setLibcallName(RTLIB::SRL_I16, "__intrinsics.srl.i16");
setLibcallName(RTLIB::SRL_I32, "__intrinsics.srl.i32");
setPIC16LibcallName(PIC16ISD::MUL_I8, "__intrinsics.mul.i8");
setLibcallName(RTLIB::MUL_I16, "__intrinsics.mul.i16");
setLibcallName(RTLIB::MUL_I32, "__intrinsics.mul.i32");
setOperationAction(ISD::GlobalAddress, MVT::i16, Custom);
setOperationAction(ISD::ExternalSymbol, MVT::i16, Custom);
setOperationAction(ISD::LOAD, MVT::i8, Legal);
setOperationAction(ISD::LOAD, MVT::i16, Custom);
setOperationAction(ISD::LOAD, MVT::i32, Custom);
setOperationAction(ISD::STORE, MVT::i8, Legal);
setOperationAction(ISD::STORE, MVT::i16, Custom);
setOperationAction(ISD::STORE, MVT::i32, Custom);
setOperationAction(ISD::ADDE, MVT::i8, Custom);
setOperationAction(ISD::ADDC, MVT::i8, Custom);
setOperationAction(ISD::SUBE, MVT::i8, Custom);
setOperationAction(ISD::SUBC, MVT::i8, Custom);
setOperationAction(ISD::ADD, MVT::i8, Custom);
setOperationAction(ISD::ADD, MVT::i16, Custom);
setOperationAction(ISD::OR, MVT::i8, Custom);
setOperationAction(ISD::AND, MVT::i8, Custom);
setOperationAction(ISD::XOR, MVT::i8, Custom);
setOperationAction(ISD::FrameIndex, MVT::i16, Custom);
setOperationAction(ISD::CALL, MVT::i16, Custom);
setOperationAction(ISD::RET, MVT::Other, Custom);
setOperationAction(ISD::MUL, MVT::i8, Custom);
setOperationAction(ISD::MUL, MVT::i16, Expand);
setOperationAction(ISD::MUL, MVT::i32, Expand);
setOperationAction(ISD::SMUL_LOHI, MVT::i8, Expand);
setOperationAction(ISD::SMUL_LOHI, MVT::i16, Expand);
setOperationAction(ISD::SMUL_LOHI, MVT::i32, Expand);
setOperationAction(ISD::UMUL_LOHI, MVT::i8, Expand);
setOperationAction(ISD::UMUL_LOHI, MVT::i16, Expand);
setOperationAction(ISD::UMUL_LOHI, MVT::i32, Expand);
setOperationAction(ISD::MULHU, MVT::i8, Expand);
setOperationAction(ISD::MULHU, MVT::i16, Expand);
setOperationAction(ISD::MULHU, MVT::i32, Expand);
setOperationAction(ISD::MULHS, MVT::i8, Expand);
setOperationAction(ISD::MULHS, MVT::i16, Expand);
setOperationAction(ISD::MULHS, MVT::i32, Expand);
setOperationAction(ISD::SRA, MVT::i8, Custom);
setOperationAction(ISD::SRA, MVT::i16, Expand);
setOperationAction(ISD::SRA, MVT::i32, Expand);
setOperationAction(ISD::SHL, MVT::i8, Custom);
setOperationAction(ISD::SHL, MVT::i16, Expand);
setOperationAction(ISD::SHL, MVT::i32, Expand);
setOperationAction(ISD::SRL, MVT::i8, Custom);
setOperationAction(ISD::SRL, MVT::i16, Expand);
setOperationAction(ISD::SRL, MVT::i32, Expand);
setOperationAction(ISD::SRA_PARTS, MVT::i8, Expand);
setOperationAction(ISD::SRA_PARTS, MVT::i16, Expand);
setOperationAction(ISD::SRA_PARTS, MVT::i32, Expand);
setOperationAction(ISD::SHL_PARTS, MVT::i8, Expand);
setOperationAction(ISD::SHL_PARTS, MVT::i16, Expand);
setOperationAction(ISD::SHL_PARTS, MVT::i32, Expand);
setOperationAction(ISD::SRL_PARTS, MVT::i8, Expand);
setOperationAction(ISD::SRL_PARTS, MVT::i16, Expand);
setOperationAction(ISD::SRL_PARTS, MVT::i32, Expand);
setOperationAction(ISD::SETCC, MVT::i8, Expand);
setOperationAction(ISD::SELECT, MVT::i8, Expand);
setOperationAction(ISD::BRCOND, MVT::Other, Expand);
setOperationAction(ISD::BRIND, MVT::Other, Expand);
setOperationAction(ISD::SELECT_CC, MVT::i8, Custom);
setOperationAction(ISD::BR_CC, MVT::i8, Custom);
setTruncStoreAction(MVT::i16, MVT::i8, Custom);
computeRegisterProperties();
}
static SDValue getOutFlag(SDValue &Op) {
SDValue Flag = Op.getValue(Op.getNode()->getNumValues() - 1);
assert (Flag.getValueType() == MVT::Flag
&& "Node does not have an out Flag");
return Flag;
}
unsigned PIC16TargetLowering::GetTmpOffsetForFI(unsigned FI, unsigned size) {
std::map<unsigned, unsigned>::iterator
MapIt = FiTmpOffsetMap.find(FI);
if (MapIt != FiTmpOffsetMap.end())
return MapIt->second;
FiTmpOffsetMap[FI] = TmpSize;
TmpSize += size;
return FiTmpOffsetMap[FI];
}
static SDValue getChain(SDValue &Op) {
SDValue Chain = Op.getValue(Op.getNode()->getNumValues() - 1);
if (Chain.getValueType() == MVT::Flag)
Chain = Op.getValue(Op.getNode()->getNumValues() - 2);
assert (Chain.getValueType() == MVT::Other
&& "Node does not have a chain");
return Chain;
}
static void PopulateResults(SDValue N, SmallVectorImpl<SDValue>&Results) {
if (N.getOpcode() == ISD::MERGE_VALUES) {
int NumResults = N.getNumOperands();
for( int i = 0; i < NumResults; i++)
Results.push_back(N.getOperand(i));
}
else
Results.push_back(N);
}
MVT PIC16TargetLowering::getSetCCResultType(MVT ValType) const {
return MVT::i8;
}
void
PIC16TargetLowering::setPIC16LibcallName(PIC16ISD::PIC16Libcall Call,
const char *Name) {
PIC16LibcallNames[Call] = Name;
}
const char *
PIC16TargetLowering::getPIC16LibcallName(PIC16ISD::PIC16Libcall Call) {
return PIC16LibcallNames[Call];
}
SDValue
PIC16TargetLowering::MakePIC16Libcall(PIC16ISD::PIC16Libcall Call,
MVT RetVT, const SDValue *Ops,
unsigned NumOps, bool isSigned,
SelectionDAG &DAG, DebugLoc dl) {
TargetLowering::ArgListTy Args;
Args.reserve(NumOps);
TargetLowering::ArgListEntry Entry;
for (unsigned i = 0; i != NumOps; ++i) {
Entry.Node = Ops[i];
Entry.Ty = Entry.Node.getValueType().getTypeForMVT();
Entry.isSExt = isSigned;
Entry.isZExt = !isSigned;
Args.push_back(Entry);
}
SDValue Callee = DAG.getExternalSymbol(getPIC16LibcallName(Call), MVT::i8);
const Type *RetTy = RetVT.getTypeForMVT();
std::pair<SDValue,SDValue> CallInfo =
LowerCallTo(DAG.getEntryNode(), RetTy, isSigned, !isSigned, false,
false, CallingConv::C, false, Callee, Args, DAG, dl);
return CallInfo.first;
}
const char *PIC16TargetLowering::getTargetNodeName(unsigned Opcode) const {
switch (Opcode) {
default: return NULL;
case PIC16ISD::Lo: return "PIC16ISD::Lo";
case PIC16ISD::Hi: return "PIC16ISD::Hi";
case PIC16ISD::MTLO: return "PIC16ISD::MTLO";
case PIC16ISD::MTHI: return "PIC16ISD::MTHI";
case PIC16ISD::MTPCLATH: return "PIC16ISD::MTPCLATH";
case PIC16ISD::PIC16Connect: return "PIC16ISD::PIC16Connect";
case PIC16ISD::Banksel: return "PIC16ISD::Banksel";
case PIC16ISD::PIC16Load: return "PIC16ISD::PIC16Load";
case PIC16ISD::PIC16LdArg: return "PIC16ISD::PIC16LdArg";
case PIC16ISD::PIC16LdWF: return "PIC16ISD::PIC16LdWF";
case PIC16ISD::PIC16Store: return "PIC16ISD::PIC16Store";
case PIC16ISD::PIC16StWF: return "PIC16ISD::PIC16StWF";
case PIC16ISD::BCF: return "PIC16ISD::BCF";
case PIC16ISD::LSLF: return "PIC16ISD::LSLF";
case PIC16ISD::LRLF: return "PIC16ISD::LRLF";
case PIC16ISD::RLF: return "PIC16ISD::RLF";
case PIC16ISD::RRF: return "PIC16ISD::RRF";
case PIC16ISD::CALL: return "PIC16ISD::CALL";
case PIC16ISD::CALLW: return "PIC16ISD::CALLW";
case PIC16ISD::SUBCC: return "PIC16ISD::SUBCC";
case PIC16ISD::SELECT_ICC: return "PIC16ISD::SELECT_ICC";
case PIC16ISD::BRCOND: return "PIC16ISD::BRCOND";
case PIC16ISD::Dummy: return "PIC16ISD::Dummy";
}
}
void PIC16TargetLowering::ReplaceNodeResults(SDNode *N,
SmallVectorImpl<SDValue>&Results,
SelectionDAG &DAG) {
switch (N->getOpcode()) {
case ISD::GlobalAddress:
Results.push_back(ExpandGlobalAddress(N, DAG));
return;
case ISD::ExternalSymbol:
Results.push_back(ExpandExternalSymbol(N, DAG));
return;
case ISD::STORE:
Results.push_back(ExpandStore(N, DAG));
return;
case ISD::LOAD:
PopulateResults(ExpandLoad(N, DAG), Results);
return;
case ISD::ADD:
return;
case ISD::FrameIndex:
Results.push_back(ExpandFrameIndex(N, DAG));
return;
default:
assert (0 && "not implemented");
return;
}
}
SDValue PIC16TargetLowering::ExpandFrameIndex(SDNode *N, SelectionDAG &DAG) {
if (N->getValueType(0) != MVT::i16)
return SDValue();
MachineFunction &MF = DAG.getMachineFunction();
const Function *Func = MF.getFunction();
const std::string Name = Func->getName();
FrameIndexSDNode *FR = dyn_cast<FrameIndexSDNode>(SDValue(N,0));
DebugLoc dl = FR->getDebugLoc();
int Index = FR->getIndex();
SDValue Offset = DAG.getConstant(0, MVT::i8);
SDValue FI = DAG.getTargetFrameIndex(Index, MVT::i8);
SDValue Lo = DAG.getNode(PIC16ISD::Lo, dl, MVT::i8, FI, Offset);
SDValue Hi = DAG.getNode(PIC16ISD::Hi, dl, MVT::i8, FI, Offset);
return DAG.getNode(ISD::BUILD_PAIR, dl, N->getValueType(0), Lo, Hi);
}
SDValue PIC16TargetLowering::ExpandStore(SDNode *N, SelectionDAG &DAG) {
StoreSDNode *St = cast<StoreSDNode>(N);
SDValue Chain = St->getChain();
SDValue Src = St->getValue();
SDValue Ptr = St->getBasePtr();
MVT ValueType = Src.getValueType();
unsigned StoreOffset = 0;
DebugLoc dl = N->getDebugLoc();
SDValue PtrLo, PtrHi;
LegalizeAddress(Ptr, DAG, PtrLo, PtrHi, StoreOffset, dl);
if (ValueType == MVT::i8) {
return DAG.getNode (PIC16ISD::PIC16Store, dl, MVT::Other, Chain, Src,
PtrLo, PtrHi,
DAG.getConstant (0 + StoreOffset, MVT::i8));
}
else if (ValueType == MVT::i16) {
SDValue SrcLo, SrcHi;
GetExpandedParts(Src, DAG, SrcLo, SrcHi);
SDValue ChainLo = Chain, ChainHi = Chain;
if (Chain.getOpcode() == ISD::TokenFactor) {
ChainLo = Chain.getOperand(0);
ChainHi = Chain.getOperand(1);
}
SDValue Store1 = DAG.getNode(PIC16ISD::PIC16Store, dl, MVT::Other,
ChainLo,
SrcLo, PtrLo, PtrHi,
DAG.getConstant (0 + StoreOffset, MVT::i8));
SDValue Store2 = DAG.getNode(PIC16ISD::PIC16Store, dl, MVT::Other, ChainHi,
SrcHi, PtrLo, PtrHi,
DAG.getConstant (1 + StoreOffset, MVT::i8));
return DAG.getNode(ISD::TokenFactor, dl, MVT::Other, getChain(Store1),
getChain(Store2));
}
else if (ValueType == MVT::i32) {
SDValue SrcLo, SrcHi;
GetExpandedParts(Src, DAG, SrcLo, SrcHi);
SDValue SrcLo1, SrcLo2, SrcHi1, SrcHi2;
GetExpandedParts(SrcLo, DAG, SrcLo1, SrcLo2);
GetExpandedParts(SrcHi, DAG, SrcHi1, SrcHi2);
SDValue ChainLo = Chain, ChainHi = Chain;
if (Chain.getOpcode() == ISD::TokenFactor) {
ChainLo = Chain.getOperand(0);
ChainHi = Chain.getOperand(1);
}
SDValue ChainLo1 = ChainLo, ChainLo2 = ChainLo, ChainHi1 = ChainHi,
ChainHi2 = ChainHi;
if (ChainLo.getOpcode() == ISD::TokenFactor) {
ChainLo1 = ChainLo.getOperand(0);
ChainLo2 = ChainLo.getOperand(1);
}
if (ChainHi.getOpcode() == ISD::TokenFactor) {
ChainHi1 = ChainHi.getOperand(0);
ChainHi2 = ChainHi.getOperand(1);
}
SDValue Store1 = DAG.getNode(PIC16ISD::PIC16Store, dl, MVT::Other,
ChainLo1,
SrcLo1, PtrLo, PtrHi,
DAG.getConstant (0 + StoreOffset, MVT::i8));
SDValue Store2 = DAG.getNode(PIC16ISD::PIC16Store, dl, MVT::Other, ChainLo2,
SrcLo2, PtrLo, PtrHi,
DAG.getConstant (1 + StoreOffset, MVT::i8));
SDValue Store3 = DAG.getNode(PIC16ISD::PIC16Store, dl, MVT::Other, ChainHi1,
SrcHi1, PtrLo, PtrHi,
DAG.getConstant (2 + StoreOffset, MVT::i8));
SDValue Store4 = DAG.getNode(PIC16ISD::PIC16Store, dl, MVT::Other, ChainHi2,
SrcHi2, PtrLo, PtrHi,
DAG.getConstant (3 + StoreOffset, MVT::i8));
SDValue RetLo = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
getChain(Store1), getChain(Store2));
SDValue RetHi = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
getChain(Store3), getChain(Store4));
return DAG.getNode(ISD::TokenFactor, dl, MVT::Other, RetLo, RetHi);
}
else {
assert (0 && "value type not supported");
return SDValue();
}
}
SDValue PIC16TargetLowering::ExpandExternalSymbol(SDNode *N, SelectionDAG &DAG)
{
ExternalSymbolSDNode *ES = dyn_cast<ExternalSymbolSDNode>(SDValue(N, 0));
DebugLoc dl = ES->getDebugLoc();
SDValue TES = DAG.getTargetExternalSymbol(ES->getSymbol(), MVT::i8);
SDValue Offset = DAG.getConstant(0, MVT::i8);
SDValue Lo = DAG.getNode(PIC16ISD::Lo, dl, MVT::i8, TES, Offset);
SDValue Hi = DAG.getNode(PIC16ISD::Hi, dl, MVT::i8, TES, Offset);
return DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i16, Lo, Hi);
}
SDValue PIC16TargetLowering::ExpandGlobalAddress(SDNode *N, SelectionDAG &DAG) {
GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(SDValue(N, 0));
DebugLoc dl = G->getDebugLoc();
SDValue TGA = DAG.getTargetGlobalAddress(G->getGlobal(), MVT::i8,
G->getOffset());
SDValue Offset = DAG.getConstant(0, MVT::i8);
SDValue Lo = DAG.getNode(PIC16ISD::Lo, dl, MVT::i8, TGA, Offset);
SDValue Hi = DAG.getNode(PIC16ISD::Hi, dl, MVT::i8, TGA, Offset);
return DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i16, Lo, Hi);
}
bool PIC16TargetLowering::isDirectAddress(const SDValue &Op) {
assert (Op.getNode() != NULL && "Can't operate on NULL SDNode!!");
if (Op.getOpcode() == ISD::BUILD_PAIR) {
if (Op.getOperand(0).getOpcode() == PIC16ISD::Lo)
return true;
}
return false;
}
bool PIC16TargetLowering::isRomAddress(const SDValue &Op) {
if (!isDirectAddress(Op))
return false;
SDValue TGA = Op.getOperand(0).getOperand(0);
GlobalAddressSDNode *GSDN = dyn_cast<GlobalAddressSDNode>(TGA);
const Type *ValueType = GSDN->getGlobal()->getType();
if (!isa<PointerType>(ValueType)) {
assert(0 && "TGA must be of a PointerType");
}
int AddrSpace = dyn_cast<PointerType>(ValueType)->getAddressSpace();
if (AddrSpace == PIC16ISD::ROM_SPACE)
return true;
return false;
}
void PIC16TargetLowering::GetExpandedParts(SDValue Op, SelectionDAG &DAG,
SDValue &Lo, SDValue &Hi) {
SDNode *N = Op.getNode();
DebugLoc dl = N->getDebugLoc();
MVT NewVT = getTypeToTransformTo(N->getValueType(0));
Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, NewVT, Op,
DAG.getConstant(0, MVT::i8));
Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, NewVT, Op,
DAG.getConstant(1, MVT::i8));
}
void
PIC16TargetLowering::LegalizeFrameIndex(SDValue Op, SelectionDAG &DAG,
SDValue &ES, int &Offset) {
MachineFunction &MF = DAG.getMachineFunction();
const Function *Func = MF.getFunction();
MachineFrameInfo *MFI = MF.getFrameInfo();
const std::string Name = Func->getName();
FrameIndexSDNode *FR = dyn_cast<FrameIndexSDNode>(Op);
unsigned FIndex = FR->getIndex();
char *tmpName = new char [strlen(Name.c_str()) + 8];
if (FIndex < ReservedFrameCount) {
sprintf(tmpName, "%s.frame", Name.c_str());
ES = DAG.getTargetExternalSymbol(tmpName, MVT::i8);
Offset = 0;
for (unsigned i=0; i<FIndex ; ++i) {
Offset += MFI->getObjectSize(i);
}
} else {
sprintf(tmpName, "%s.tmp", Name.c_str());
ES = DAG.getTargetExternalSymbol(tmpName, MVT::i8);
Offset = GetTmpOffsetForFI(FIndex, MFI->getObjectSize(FIndex));
}
return;
}
void PIC16TargetLowering::LegalizeAddress(SDValue Ptr, SelectionDAG &DAG,
SDValue &Lo, SDValue &Hi,
unsigned &Offset, DebugLoc dl) {
Offset = 0;
if (Ptr.getOpcode() == ISD::ADD) {
SDValue OperLeft = Ptr.getOperand(0);
SDValue OperRight = Ptr.getOperand(1);
if (OperLeft.getOpcode() == ISD::Constant) {
Offset = dyn_cast<ConstantSDNode>(OperLeft)->getZExtValue();
Ptr = OperRight;
} else if (OperRight.getOpcode() == ISD::Constant) {
Offset = dyn_cast<ConstantSDNode>(OperRight)->getZExtValue();
Ptr = OperLeft;
}
}
if (Ptr.getValueType() == MVT::i8) {
switch (Ptr.getOpcode()) {
case ISD::TargetExternalSymbol:
Lo = Ptr;
Hi = DAG.getConstant(1, MVT::i8);
return;
}
}
if (isDirectAddress(Ptr)) {
SDValue TFI = Ptr.getOperand(0).getOperand(0);
if (TFI.getOpcode() == ISD::TargetFrameIndex) {
int FrameOffset;
LegalizeFrameIndex(TFI, DAG, Lo, FrameOffset);
Hi = DAG.getConstant(1, MVT::i8);
Offset += FrameOffset;
return;
}
}
if (isDirectAddress(Ptr) && !isRomAddress(Ptr)) {
Lo = Ptr.getOperand(0).getOperand(0);
Hi = DAG.getConstant(1, MVT::i8);
return;
}
GetExpandedParts(Ptr, DAG, Lo, Hi);
Lo = DAG.getNode(PIC16ISD::MTLO, dl, MVT::i8, Lo);
Hi = DAG.getNode(PIC16ISD::MTHI, dl, MVT::i8, Hi);
return;
}
SDValue PIC16TargetLowering::ExpandLoad(SDNode *N, SelectionDAG &DAG) {
LoadSDNode *LD = dyn_cast<LoadSDNode>(SDValue(N, 0));
SDValue Chain = LD->getChain();
SDValue Ptr = LD->getBasePtr();
DebugLoc dl = LD->getDebugLoc();
SDValue Load, Offset;
SDVTList Tys;
MVT VT, NewVT;
SDValue PtrLo, PtrHi;
unsigned LoadOffset;
LegalizeAddress(Ptr, DAG, PtrLo, PtrHi, LoadOffset, dl);
VT = N->getValueType(0);
unsigned NumLoads = VT.getSizeInBits() / 8;
std::vector<SDValue> PICLoads;
unsigned iter;
MVT MemVT = LD->getMemoryVT();
if(ISD::isNON_EXTLoad(N)) {
for (iter=0; iter<NumLoads ; ++iter) {
Offset = DAG.getConstant(iter + LoadOffset, MVT::i8);
Tys = DAG.getVTList(MVT::i8, MVT::Other);
Load = DAG.getNode(PIC16ISD::PIC16Load, dl, Tys, Chain, PtrLo, PtrHi,
Offset);
PICLoads.push_back(Load);
}
} else {
MVT MemVT = LD->getMemoryVT();
unsigned MemBytes = MemVT.getSizeInBits() / 8;
unsigned ExtdBytes = VT.getSizeInBits() / 8;
Offset = DAG.getConstant(LoadOffset, MVT::i8);
Tys = DAG.getVTList(MVT::i8, MVT::Other);
for (iter=0; iter<MemBytes; ++iter) {
Offset = DAG.getConstant(iter + LoadOffset, MVT::i8);
Load = DAG.getNode(PIC16ISD::PIC16Load, dl, Tys, Chain, PtrLo, PtrHi,
Offset);
PICLoads.push_back(Load);
}
if (ISD::isSEXTLoad(N)) {
SDValue SRA = DAG.getNode(ISD::SRA, dl, MVT::i8, Load,
DAG.getConstant(7, MVT::i8));
for (iter=MemBytes; iter<ExtdBytes; ++iter) {
PICLoads.push_back(SRA);
}
} else if (ISD::isZEXTLoad(N)) {
SDValue ConstZero = DAG.getConstant(0, MVT::i8);
for (iter=MemBytes; iter<ExtdBytes; ++iter) {
PICLoads.push_back(ConstZero);
}
}
}
SDValue BP;
if (VT == MVT::i8) {
return PICLoads[0];
}
else if (VT == MVT::i16) {
BP = DAG.getNode(ISD::BUILD_PAIR, dl, VT, PICLoads[0], PICLoads[1]);
if (MemVT == MVT::i8)
Chain = getChain(PICLoads[0]);
else
Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
getChain(PICLoads[0]), getChain(PICLoads[1]));
} else if (VT == MVT::i32) {
SDValue BPs[2];
BPs[0] = DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i16,
PICLoads[0], PICLoads[1]);
BPs[1] = DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i16,
PICLoads[2], PICLoads[3]);
BP = DAG.getNode(ISD::BUILD_PAIR, dl, VT, BPs[0], BPs[1]);
if (MemVT == MVT::i8)
Chain = getChain(PICLoads[0]);
else if (MemVT == MVT::i16)
Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
getChain(PICLoads[0]), getChain(PICLoads[1]));
else {
SDValue Chains[2];
Chains[0] = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
getChain(PICLoads[0]), getChain(PICLoads[1]));
Chains[1] = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
getChain(PICLoads[2]), getChain(PICLoads[3]));
Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
Chains[0], Chains[1]);
}
}
Tys = DAG.getVTList(VT, MVT::Other);
return DAG.getNode(ISD::MERGE_VALUES, dl, Tys, BP, Chain);
}
SDValue PIC16TargetLowering::LowerShift(SDValue Op, SelectionDAG &DAG) {
assert (Op.getValueType() == MVT::i8 && "illegal shift to lower");
SDNode *N = Op.getNode();
SDValue Value = N->getOperand(0);
SDValue Amt = N->getOperand(1);
PIC16ISD::PIC16Libcall CallCode;
switch (N->getOpcode()) {
case ISD::SRA:
CallCode = PIC16ISD::SRA_I8;
break;
case ISD::SHL:
CallCode = PIC16ISD::SLL_I8;
break;
case ISD::SRL:
CallCode = PIC16ISD::SRL_I8;
break;
default:
assert ( 0 && "This shift is not implemented yet.");
return SDValue();
}
SmallVector<SDValue, 2> Ops(2);
Ops[0] = Value;
Ops[1] = Amt;
SDValue Call = MakePIC16Libcall(CallCode, N->getValueType(0), &Ops[0], 2,
true, DAG, N->getDebugLoc());
return Call;
}
void
PIC16TargetLowering::LowerOperationWrapper(SDNode *N,
SmallVectorImpl<SDValue>&Results,
SelectionDAG &DAG) {
SDValue Op = SDValue(N, 0);
SDValue Res;
unsigned i;
switch (Op.getOpcode()) {
case ISD::FORMAL_ARGUMENTS:
Res = LowerFORMAL_ARGUMENTS(Op, DAG); break;
case ISD::LOAD:
Res = ExpandLoad(Op.getNode(), DAG); break;
case ISD::CALL:
Res = LowerCALL(Op, DAG); break;
default: {
Res = LowerOperation(Op, DAG);
if (Res.getNode())
Results.push_back(Res);
return;
}
}
N = Res.getNode();
unsigned NumValues = N->getNumValues();
for (i = 0; i < NumValues ; i++) {
Results.push_back(SDValue(N, i));
}
}
SDValue PIC16TargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) {
switch (Op.getOpcode()) {
case ISD::FORMAL_ARGUMENTS:
return LowerFORMAL_ARGUMENTS(Op, DAG);
case ISD::ADD:
case ISD::ADDC:
case ISD::ADDE:
return LowerADD(Op, DAG);
case ISD::SUB:
case ISD::SUBC:
case ISD::SUBE:
return LowerSUB(Op, DAG);
case ISD::LOAD:
return ExpandLoad(Op.getNode(), DAG);
case ISD::STORE:
return ExpandStore(Op.getNode(), DAG);
case ISD::SHL:
case ISD::SRA:
case ISD::SRL:
return LowerShift(Op, DAG);
case ISD::OR:
case ISD::AND:
case ISD::XOR:
return LowerBinOp(Op, DAG);
case ISD::CALL:
return LowerCALL(Op, DAG);
case ISD::RET:
return LowerRET(Op, DAG);
case ISD::BR_CC:
return LowerBR_CC(Op, DAG);
case ISD::SELECT_CC:
return LowerSELECT_CC(Op, DAG);
}
return SDValue();
}
SDValue PIC16TargetLowering::ConvertToMemOperand(SDValue Op,
SelectionDAG &DAG,
DebugLoc dl) {
assert (Op.getValueType() == MVT::i8
&& "illegal value type to store on stack.");
MachineFunction &MF = DAG.getMachineFunction();
const Function *Func = MF.getFunction();
const std::string FuncName = Func->getName();
char *tmpName = new char [strlen(FuncName.c_str()) + 8];
int FI = MF.getFrameInfo()->CreateStackObject(1, 1);
sprintf(tmpName, "%s.tmp", FuncName.c_str());
SDValue ES = DAG.getTargetExternalSymbol(tmpName, MVT::i8);
SDValue Store = DAG.getNode (PIC16ISD::PIC16Store, dl, MVT::Other,
DAG.getEntryNode(),
Op, ES,
DAG.getConstant (1, MVT::i8), DAG.getConstant (GetTmpOffsetForFI(FI, 1),
MVT::i8));
SDVTList Tys = DAG.getVTList(MVT::i8, MVT::Other);
SDValue Load = DAG.getNode(PIC16ISD::PIC16Load, dl, Tys, Store,
ES, DAG.getConstant (1, MVT::i8),
DAG.getConstant (GetTmpOffsetForFI(FI, 1),
MVT::i8));
return Load.getValue(0);
}
SDValue PIC16TargetLowering::
LowerIndirectCallArguments(SDValue Op, SDValue Chain, SDValue InFlag,
SDValue DataAddr_Lo, SDValue DataAddr_Hi,
SelectionDAG &DAG) {
CallSDNode *TheCall = dyn_cast<CallSDNode>(Op);
unsigned NumOps = TheCall->getNumArgs();
DebugLoc dl = TheCall->getDebugLoc();
if (NumOps == 0)
return Chain;
std::vector<SDValue> Ops;
SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Flag);
SDValue Arg, StoreRet;
unsigned RetVals = TheCall->getNumRetVals();
for (unsigned i = 0, ArgOffset = RetVals; i < NumOps; i++) {
Arg = TheCall->getArg(i);
Ops.clear();
Ops.push_back(Chain);
Ops.push_back(Arg);
Ops.push_back(DataAddr_Lo);
Ops.push_back(DataAddr_Hi);
Ops.push_back(DAG.getConstant(ArgOffset, MVT::i8));
Ops.push_back(InFlag);
StoreRet = DAG.getNode (PIC16ISD::PIC16StWF, dl, Tys, &Ops[0], Ops.size());
Chain = getChain(StoreRet);
InFlag = getOutFlag(StoreRet);
ArgOffset++;
}
return Chain;
}
SDValue PIC16TargetLowering::
LowerDirectCallArguments(SDValue Op, SDValue Chain, SDValue ArgLabel,
SDValue InFlag, SelectionDAG &DAG) {
CallSDNode *TheCall = dyn_cast<CallSDNode>(Op);
unsigned NumOps = TheCall->getNumArgs();
DebugLoc dl = TheCall->getDebugLoc();
std::string Name;
SDValue Arg, StoreAt;
MVT ArgVT;
unsigned Size=0;
unsigned ArgCount=0;
if (NumOps == 0)
return Chain;
SDValue PtrLo, PtrHi;
unsigned AddressOffset;
int StoreOffset = 0;
LegalizeAddress(ArgLabel, DAG, PtrLo, PtrHi, AddressOffset, dl);
SDValue StoreRet;
std::vector<SDValue> Ops;
SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Flag);
for (unsigned i=ArgCount, Offset = 0; i<NumOps; i++) {
Arg = TheCall->getArg(i);
StoreOffset = (Offset + AddressOffset);
Ops.clear();
Ops.push_back(Chain);
Ops.push_back(Arg);
Ops.push_back(PtrLo);
Ops.push_back(PtrHi);
Ops.push_back(DAG.getConstant(StoreOffset, MVT::i8));
Ops.push_back(InFlag);
StoreRet = DAG.getNode (PIC16ISD::PIC16StWF, dl, Tys, &Ops[0], Ops.size());
Chain = getChain(StoreRet);
InFlag = getOutFlag(StoreRet);
ArgVT = Arg.getValueType();
Size = ArgVT.getSizeInBits();
Size = Size/8; Offset += Size; }
return Chain;
}
SDValue PIC16TargetLowering::
LowerIndirectCallReturn (SDValue Op, SDValue Chain, SDValue InFlag,
SDValue DataAddr_Lo, SDValue DataAddr_Hi,
SelectionDAG &DAG) {
CallSDNode *TheCall = dyn_cast<CallSDNode>(Op);
DebugLoc dl = TheCall->getDebugLoc();
unsigned RetVals = TheCall->getNumRetVals();
if (RetVals == 0)
return Chain;
std::vector<SDValue> ResultVals;
SDValue LoadRet;
SDVTList Tys = DAG.getVTList(MVT::i8, MVT::Other, MVT::Flag);
for(unsigned i=0;i<RetVals;i++) {
LoadRet = DAG.getNode(PIC16ISD::PIC16LdWF, dl, Tys, Chain, DataAddr_Lo,
DataAddr_Hi, DAG.getConstant(i, MVT::i8),
InFlag);
InFlag = getOutFlag(LoadRet);
Chain = getChain(LoadRet);
ResultVals.push_back(LoadRet);
}
ResultVals.push_back(Chain);
SDValue Res = DAG.getMergeValues(&ResultVals[0], ResultVals.size(), dl);
return Res;
}
SDValue PIC16TargetLowering::
LowerDirectCallReturn(SDValue Op, SDValue Chain, SDValue RetLabel,
SDValue InFlag, SelectionDAG &DAG) {
CallSDNode *TheCall = dyn_cast<CallSDNode>(Op);
DebugLoc dl = TheCall->getDebugLoc();
unsigned RetVals = TheCall->getNumRetVals();
std::vector<SDValue> ResultVals;
if (RetVals == 0)
return Chain;
SDValue LdLo, LdHi;
unsigned LdOffset;
LegalizeAddress(RetLabel, DAG, LdLo, LdHi, LdOffset, dl);
SDVTList Tys = DAG.getVTList(MVT::i8, MVT::Other, MVT::Flag);
SDValue LoadRet;
for(unsigned i=0, Offset=0;i<RetVals;i++) {
LoadRet = DAG.getNode(PIC16ISD::PIC16LdWF, dl, Tys, Chain, LdLo, LdHi,
DAG.getConstant(LdOffset + Offset, MVT::i8),
InFlag);
InFlag = getOutFlag(LoadRet);
Chain = getChain(LoadRet);
Offset++;
ResultVals.push_back(LoadRet);
}
ResultVals.push_back(Chain);
SDValue Res = DAG.getMergeValues(&ResultVals[0], ResultVals.size(), dl);
return Res;
}
SDValue PIC16TargetLowering::LowerRET(SDValue Op, SelectionDAG &DAG) {
SDValue Chain = Op.getOperand(0);
DebugLoc dl = Op.getDebugLoc();
if (Op.getNumOperands() == 1) return Op;
if ((Op.getNumOperands() % 2) == 0 ) {
assert(0 && "Do not know how to return this many arguments!");
abort();
}
unsigned NumRet = (Op.getNumOperands() / 2);
MachineFunction &MF = DAG.getMachineFunction();
const Function *F = MF.getFunction();
std::string FuncName = F->getName();
char *tmpName = new char [strlen(FuncName.c_str()) + 8];
sprintf(tmpName, "%s.frame", FuncName.c_str());
SDVTList VTs = DAG.getVTList (MVT::i8, MVT::Other);
SDValue ES = DAG.getTargetExternalSymbol(tmpName, MVT::i8);
SDValue BS = DAG.getConstant(1, MVT::i8);
SDValue RetVal;
for(unsigned i=0;i<NumRet; ++i) {
RetVal = Op.getNode()->getOperand(2*i + 1);
Chain = DAG.getNode (PIC16ISD::PIC16Store, dl, MVT::Other, Chain, RetVal,
ES, BS,
DAG.getConstant (i, MVT::i8));
}
return DAG.getNode(ISD::RET, dl, MVT::Other, Chain);
}
SDValue PIC16TargetLowering::LegalizeCALL(SDValue Op, SelectionDAG &DAG) {
CallSDNode *TheCall = dyn_cast<CallSDNode>(Op);
SDValue Chain = TheCall->getChain();
SDValue Callee = TheCall->getCallee();
DebugLoc dl = TheCall->getDebugLoc();
unsigned i =0;
assert(Callee.getValueType() == MVT::i16 &&
"Don't know how to legalize this call node!!!");
assert(Callee.getOpcode() == ISD::BUILD_PAIR &&
"Don't know how to legalize this call node!!!");
if (isDirectAddress(Callee)) {
Callee = Callee.getOperand(0).getOperand(0);
} else {
SDValue Lo, Hi;
GetExpandedParts(Callee, DAG, Lo, Hi);
Callee = DAG.getNode(PIC16ISD::PIC16Connect, dl, MVT::i8, Lo, Hi);
}
std::vector<SDValue> Ops;
Ops.push_back(Chain);
Ops.push_back(Callee);
unsigned NumArgs = TheCall->getNumArgs();
for(i=0;i<NumArgs;i++) {
Ops.push_back(TheCall->getArg(i));
Ops.push_back(TheCall->getArgFlagsVal(i));
}
std::vector<MVT> NodeTys;
unsigned NumRets = TheCall->getNumRetVals();
for(i=0;i<NumRets;i++)
NodeTys.push_back(TheCall->getRetValType(i));
NodeTys.push_back(MVT::Other);
SDVTList VTs = DAG.getVTList(&NodeTys[0], NodeTys.size());
return DAG.getCall(TheCall->getCallingConv(), dl,
TheCall->isVarArg(), TheCall->isTailCall(),
TheCall->isInreg(), VTs, &Ops[0], Ops.size());
}
void PIC16TargetLowering::
GetDataAddress(DebugLoc dl, SDValue Callee, SDValue &Chain,
SDValue &DataAddr_Lo, SDValue &DataAddr_Hi,
SelectionDAG &DAG) {
assert (Callee.getOpcode() == PIC16ISD::PIC16Connect
&& "Don't know what to do of such callee!!");
SDValue ZeroOperand = DAG.getConstant(0, MVT::i8);
SDValue SeqStart = DAG.getCALLSEQ_START(Chain, ZeroOperand);
Chain = getChain(SeqStart);
SDValue OperFlag = getOutFlag(SeqStart);
SDValue Lo = Callee.getOperand(0);
SDValue Hi = Callee.getOperand(1);
SDValue Data_Lo, Data_Hi;
SDVTList Tys = DAG.getVTList(MVT::i8, MVT::Other, MVT::Flag);
Hi = DAG.getNode(PIC16ISD::MTPCLATH, dl, MVT::i8, Hi);
Data_Lo = DAG.getNode(ISD::SUB, dl, MVT::i8, Lo, DAG.getConstant(2, MVT::i8));
Callee = DAG.getNode(PIC16ISD::PIC16Connect, dl, MVT::i8, Data_Lo, Hi);
SDValue Call = DAG.getNode(PIC16ISD::CALLW, dl, Tys, Chain, Callee,
OperFlag);
Chain = getChain(Call);
OperFlag = getOutFlag(Call);
SDValue SeqEnd = DAG.getCALLSEQ_END(Chain, ZeroOperand, ZeroOperand,
OperFlag);
Chain = getChain(SeqEnd);
OperFlag = getOutFlag(SeqEnd);
DataAddr_Lo = DAG.getNode(PIC16ISD::MTLO, dl, MVT::i8, Call, OperFlag);
SeqStart = DAG.getCALLSEQ_START(Chain, ZeroOperand);
Chain = getChain(SeqStart);
OperFlag = getOutFlag(SeqStart);
Data_Lo = DAG.getNode(ISD::SUB, dl, MVT::i8, Lo, DAG.getConstant(1, MVT::i8));
Callee = DAG.getNode(PIC16ISD::PIC16Connect, dl, MVT::i8, Data_Lo, Hi);
Call = DAG.getNode(PIC16ISD::CALLW, dl, Tys, Chain, Callee, OperFlag);
Chain = getChain(Call);
OperFlag = getOutFlag(Call);
SeqEnd = DAG.getCALLSEQ_END(Chain, ZeroOperand, ZeroOperand,
OperFlag);
Chain = getChain(SeqEnd);
OperFlag = getOutFlag(SeqEnd);
DataAddr_Hi = DAG.getNode(PIC16ISD::MTHI, dl, MVT::i8, Call, OperFlag);
}
SDValue PIC16TargetLowering::LowerCALL(SDValue Op, SelectionDAG &DAG) {
CallSDNode *TheCall = dyn_cast<CallSDNode>(Op);
SDValue Chain = TheCall->getChain();
SDValue Callee = TheCall->getCallee();
DebugLoc dl = TheCall->getDebugLoc();
if (Callee.getValueType() == MVT::i16 &&
Callee.getOpcode() == ISD::BUILD_PAIR) {
return LegalizeCALL(Op, DAG);
}
bool IsDirectCall = true;
unsigned RetVals = TheCall->getNumRetVals();
unsigned NumArgs = TheCall->getNumArgs();
SDValue DataAddr_Lo, DataAddr_Hi;
if (Callee.getOpcode() == PIC16ISD::PIC16Connect) {
IsDirectCall = false; if ((RetVals > 0) || (NumArgs > 0))
GetDataAddress(dl, Callee, Chain, DataAddr_Lo, DataAddr_Hi, DAG);
}
SDValue ZeroOperand = DAG.getConstant(0, MVT::i8);
SDValue SeqStart = DAG.getCALLSEQ_START(Chain, ZeroOperand);
Chain = getChain(SeqStart);
SDValue OperFlag = getOutFlag(SeqStart); std::string Name;
SDValue ArgLabel, RetLabel;
if (IsDirectCall) {
if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
GlobalValue *GV = G->getGlobal();
Callee = DAG.getTargetGlobalAddress(GV, MVT::i8);
Name = G->getGlobal()->getName();
} else { ExternalSymbolSDNode *ES = dyn_cast<ExternalSymbolSDNode>(Callee);
Callee = DAG.getTargetExternalSymbol(ES->getSymbol(), MVT::i8);
Name = ES->getSymbol();
}
char *argFrame = new char [strlen(Name.c_str()) + 8];
sprintf(argFrame, "%s.args", Name.c_str());
ArgLabel = DAG.getTargetExternalSymbol(argFrame, MVT::i8);
char *retName = new char [strlen(Name.c_str()) + 8];
sprintf(retName, "%s.retval", Name.c_str());
RetLabel = DAG.getTargetExternalSymbol(retName, MVT::i8);
} else {
SDValue CodeAddr_Lo = Callee.getOperand(0);
SDValue CodeAddr_Hi = Callee.getOperand(1);
CodeAddr_Hi = DAG.getNode(PIC16ISD::MTPCLATH, dl, MVT::i8, CodeAddr_Hi);
Callee = DAG.getNode(PIC16ISD::PIC16Connect, dl, MVT::i8, CodeAddr_Lo,
CodeAddr_Hi);
}
SDValue CallArgs;
if (IsDirectCall) {
CallArgs = LowerDirectCallArguments(Op, Chain, ArgLabel, OperFlag, DAG);
Chain = getChain(CallArgs);
OperFlag = getOutFlag(CallArgs);
} else {
CallArgs = LowerIndirectCallArguments(Op, Chain, OperFlag, DataAddr_Lo,
DataAddr_Hi, DAG);
Chain = getChain(CallArgs);
OperFlag = getOutFlag(CallArgs);
}
SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Flag);
SDValue PICCall = DAG.getNode(PIC16ISD::CALL, dl, Tys, Chain, Callee,
OperFlag);
Chain = getChain(PICCall);
OperFlag = getOutFlag(PICCall);
SDValue SeqEnd = DAG.getCALLSEQ_END(Chain, ZeroOperand, ZeroOperand,
OperFlag);
Chain = getChain(SeqEnd);
OperFlag = getOutFlag(SeqEnd);
if (IsDirectCall)
return LowerDirectCallReturn(Op, Chain, RetLabel, OperFlag, DAG);
else
return LowerIndirectCallReturn(Op, Chain, OperFlag, DataAddr_Lo,
DataAddr_Hi, DAG);
}
bool PIC16TargetLowering::isDirectLoad(const SDValue Op) {
if (Op.getOpcode() == PIC16ISD::PIC16Load)
if (Op.getOperand(1).getOpcode() == ISD::TargetGlobalAddress
|| Op.getOperand(1).getOpcode() == ISD::TargetExternalSymbol)
return true;
return false;
}
bool PIC16TargetLowering::NeedToConvertToMemOp(SDValue Op, unsigned &MemOp) {
if (Op.getOperand(0).getOpcode() == ISD::Constant ||
Op.getOperand(1).getOpcode() == ISD::Constant)
return false;
if (isDirectLoad(Op.getOperand(0))) {
if (Op.getOperand(0).hasOneUse())
return false;
else
MemOp = 0;
}
if (isDirectLoad(Op.getOperand(1))) {
if (Op.getOperand(1).hasOneUse())
return false;
else
MemOp = 1;
}
return true;
}
SDValue PIC16TargetLowering::LowerBinOp(SDValue Op, SelectionDAG &DAG) {
DebugLoc dl = Op.getDebugLoc();
assert (Op.getValueType() == MVT::i8 && "illegal Op to lower");
unsigned MemOp = 1;
if (NeedToConvertToMemOp(Op, MemOp)) {
SDValue NewVal = ConvertToMemOperand (Op.getOperand(MemOp), DAG, dl);
return DAG.getNode(Op.getOpcode(), dl, MVT::i8, Op.getOperand(MemOp ^ 1),
NewVal);
}
else {
return Op;
}
}
SDValue PIC16TargetLowering::LowerADD(SDValue Op, SelectionDAG &DAG) {
assert (Op.getValueType() == MVT::i8 && "illegal add to lower");
DebugLoc dl = Op.getDebugLoc();
unsigned MemOp = 1;
if (NeedToConvertToMemOp(Op, MemOp)) {
SDValue NewVal = ConvertToMemOperand (Op.getOperand(MemOp), DAG, dl);
SDVTList Tys = DAG.getVTList(MVT::i8, MVT::Flag);
if (Op.getOpcode() == ISD::ADDE)
return DAG.getNode(Op.getOpcode(), dl, Tys, Op.getOperand(MemOp ^ 1),
NewVal, Op.getOperand(2));
else if (Op.getOpcode() == ISD::ADDC)
return DAG.getNode(Op.getOpcode(), dl, Tys, Op.getOperand(MemOp ^ 1),
NewVal);
else
return DAG.getNode(Op.getOpcode(), dl, MVT::i8, Op.getOperand(MemOp ^ 1),
NewVal);
}
else if (Op.getOpcode() == ISD::ADD)
return Op;
else
return SDValue();
}
SDValue PIC16TargetLowering::LowerSUB(SDValue Op, SelectionDAG &DAG) {
DebugLoc dl = Op.getDebugLoc();
assert (Op.getValueType() == MVT::i8 && "illegal sub to lower");
if (isDirectLoad(Op.getOperand(0)) && Op.getOperand(0).hasOneUse())
return SDValue();
SDValue NewVal = ConvertToMemOperand (Op.getOperand(0), DAG, dl);
SDVTList Tys = DAG.getVTList(MVT::i8, MVT::Flag);
if (Op.getOpcode() == ISD::SUBE)
return DAG.getNode(Op.getOpcode(), dl, Tys, NewVal, Op.getOperand(1),
Op.getOperand(2));
else
return DAG.getNode(Op.getOpcode(), dl, Tys, NewVal, Op.getOperand(1));
}
void PIC16TargetLowering::InitReservedFrameCount(const Function *F) {
unsigned NumArgs = F->arg_size();
bool isVoidFunc = (F->getReturnType()->getTypeID() == Type::VoidTyID);
if (isVoidFunc)
ReservedFrameCount = NumArgs;
else
ReservedFrameCount = NumArgs + 1;
}
SDValue PIC16TargetLowering::LowerFORMAL_ARGUMENTS(SDValue Op,
SelectionDAG &DAG) {
SmallVector<SDValue, 8> ArgValues;
unsigned NumArgVals = Op.getNode()->getNumValues() - 1;
DebugLoc dl = Op.getDebugLoc();
SDValue Chain = Op.getOperand(0);
MachineFunction &MF = DAG.getMachineFunction();
const Function *F = MF.getFunction();
std::string FuncName = F->getName();
ResetTmpOffsetMap();
InitReservedFrameCount(F);
char *tmpName = new char [strlen(FuncName.c_str()) + 6];
sprintf(tmpName, "%s.args", FuncName.c_str());
SDValue ES = DAG.getTargetExternalSymbol(tmpName, MVT::i8);
SDVTList VTs = DAG.getVTList (MVT::i8, MVT::Other);
SDValue BS = DAG.getConstant(1, MVT::i8);
for (unsigned i = 0; i < NumArgVals ; ++i) {
SDValue Offset = DAG.getConstant(i, MVT::i8);
SDValue PICLoad = DAG.getNode(PIC16ISD::PIC16LdArg, dl, VTs, Chain, ES, BS,
Offset);
Chain = getChain(PICLoad);
ArgValues.push_back(PICLoad);
}
ArgValues.push_back(Op.getOperand(0));
return DAG.getNode(ISD::MERGE_VALUES, dl, Op.getNode()->getVTList(),
&ArgValues[0], ArgValues.size()).getValue(Op.getResNo());
}
SDValue PIC16TargetLowering::
PerformPIC16LoadCombine(SDNode *N, DAGCombinerInfo &DCI) const {
SelectionDAG &DAG = DCI.DAG;
SDValue Chain = N->getOperand(0);
if (N->hasNUsesOfValue(0, 0)) {
DAG.ReplaceAllUsesOfValueWith(SDValue(N,1), Chain);
}
return SDValue();
}
SDValue PIC16TargetLowering::
PerformStoreCombine(SDNode *N, DAGCombinerInfo &DCI) const {
return SDValue(N, 0);
}
SDValue PIC16TargetLowering::PerformDAGCombine(SDNode *N,
DAGCombinerInfo &DCI) const {
switch (N->getOpcode()) {
case ISD::STORE:
return PerformStoreCombine(N, DCI);
case PIC16ISD::PIC16Load:
return PerformPIC16LoadCombine(N, DCI);
}
return SDValue();
}
static PIC16CC::CondCodes IntCCToPIC16CC(ISD::CondCode CC) {
switch (CC) {
default: assert(0 && "Unknown condition code!");
case ISD::SETNE: return PIC16CC::NE;
case ISD::SETEQ: return PIC16CC::EQ;
case ISD::SETGT: return PIC16CC::GT;
case ISD::SETGE: return PIC16CC::GE;
case ISD::SETLT: return PIC16CC::LT;
case ISD::SETLE: return PIC16CC::LE;
case ISD::SETULT: return PIC16CC::ULT;
case ISD::SETULE: return PIC16CC::LE;
case ISD::SETUGE: return PIC16CC::GE;
case ISD::SETUGT: return PIC16CC::UGT;
}
}
static void LookThroughSetCC(SDValue &LHS, SDValue &RHS,
ISD::CondCode CC, unsigned &SPCC) {
if (isa<ConstantSDNode>(RHS) &&
cast<ConstantSDNode>(RHS)->getZExtValue() == 0 &&
CC == ISD::SETNE &&
(LHS.getOpcode() == PIC16ISD::SELECT_ICC &&
LHS.getOperand(3).getOpcode() == PIC16ISD::SUBCC) &&
isa<ConstantSDNode>(LHS.getOperand(0)) &&
isa<ConstantSDNode>(LHS.getOperand(1)) &&
cast<ConstantSDNode>(LHS.getOperand(0))->getZExtValue() == 1 &&
cast<ConstantSDNode>(LHS.getOperand(1))->getZExtValue() == 0) {
SDValue CMPCC = LHS.getOperand(3);
SPCC = cast<ConstantSDNode>(LHS.getOperand(2))->getZExtValue();
LHS = CMPCC.getOperand(0);
RHS = CMPCC.getOperand(1);
}
}
SDValue PIC16TargetLowering::getPIC16Cmp(SDValue LHS, SDValue RHS,
unsigned CC, SDValue &PIC16CC,
SelectionDAG &DAG, DebugLoc dl) {
PIC16CC::CondCodes CondCode = (PIC16CC::CondCodes) CC;
if (RHS.getOpcode() == ISD::Constant) {
SDValue Tmp = LHS;
LHS = RHS;
RHS = Tmp;
switch (CondCode) {
default: break;
case PIC16CC::LT:
CondCode = PIC16CC::GT;
break;
case PIC16CC::GT:
CondCode = PIC16CC::LT;
break;
case PIC16CC::ULT:
CondCode = PIC16CC::UGT;
break;
case PIC16CC::UGT:
CondCode = PIC16CC::ULT;
break;
case PIC16CC::GE:
CondCode = PIC16CC::LE;
break;
case PIC16CC::LE:
CondCode = PIC16CC::GE;
break;
case PIC16CC::ULE:
CondCode = PIC16CC::UGE;
break;
case PIC16CC::UGE:
CondCode = PIC16CC::ULE;
break;
}
}
PIC16CC = DAG.getConstant(CondCode, MVT::i8);
SDValue Mask = DAG.getConstant(128, MVT::i8);
if (isSignedComparison(CondCode)) {
LHS = DAG.getNode (ISD::XOR, dl, MVT::i8, LHS, Mask);
RHS = DAG.getNode (ISD::XOR, dl, MVT::i8, RHS, Mask);
}
SDVTList VTs = DAG.getVTList (MVT::i8, MVT::Flag);
if ((LHS.getOpcode() == ISD::Constant || isDirectLoad(LHS))
&& LHS.hasOneUse())
return DAG.getNode(PIC16ISD::SUBCC, dl, VTs, LHS, RHS);
LHS = ConvertToMemOperand (LHS, DAG, dl);
return DAG.getNode(PIC16ISD::SUBCC, dl, VTs, LHS, RHS);
}
SDValue PIC16TargetLowering::LowerSELECT_CC(SDValue Op, SelectionDAG &DAG) {
SDValue LHS = Op.getOperand(0);
SDValue RHS = Op.getOperand(1);
ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(4))->get();
SDValue TrueVal = Op.getOperand(2);
SDValue FalseVal = Op.getOperand(3);
unsigned ORIGCC = ~0;
DebugLoc dl = Op.getDebugLoc();
LookThroughSetCC(LHS, RHS, CC, ORIGCC);
if (ORIGCC == ~0U) ORIGCC = IntCCToPIC16CC (CC);
SDValue PIC16CC;
SDValue Cmp = getPIC16Cmp(LHS, RHS, ORIGCC, PIC16CC, DAG, dl);
return DAG.getNode (PIC16ISD::SELECT_ICC, dl, TrueVal.getValueType(), TrueVal,
FalseVal, PIC16CC, Cmp.getValue(1));
}
MachineBasicBlock *
PIC16TargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
MachineBasicBlock *BB) const {
const TargetInstrInfo &TII = *getTargetMachine().getInstrInfo();
unsigned CC = (PIC16CC::CondCodes)MI->getOperand(3).getImm();
DebugLoc dl = MI->getDebugLoc();
const BasicBlock *LLVM_BB = BB->getBasicBlock();
MachineFunction::iterator It = BB;
++It;
MachineBasicBlock *thisMBB = BB;
MachineFunction *F = BB->getParent();
MachineBasicBlock *copy0MBB = F->CreateMachineBasicBlock(LLVM_BB);
MachineBasicBlock *sinkMBB = F->CreateMachineBasicBlock(LLVM_BB);
BuildMI(BB, dl, TII.get(PIC16::pic16brcond)).addMBB(sinkMBB).addImm(CC);
F->insert(It, copy0MBB);
F->insert(It, sinkMBB);
sinkMBB->transferSuccessors(BB);
BB->addSuccessor(copy0MBB);
BB->addSuccessor(sinkMBB);
BB = copy0MBB;
BB->addSuccessor(sinkMBB);
BB = sinkMBB;
BuildMI(BB, dl, TII.get(PIC16::PHI), MI->getOperand(0).getReg())
.addReg(MI->getOperand(2).getReg()).addMBB(copy0MBB)
.addReg(MI->getOperand(1).getReg()).addMBB(thisMBB);
F->DeleteMachineInstr(MI); return BB;
}
SDValue PIC16TargetLowering::LowerBR_CC(SDValue Op, SelectionDAG &DAG) {
SDValue Chain = Op.getOperand(0);
ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(1))->get();
SDValue LHS = Op.getOperand(2); SDValue RHS = Op.getOperand(3); SDValue Dest = Op.getOperand(4); unsigned ORIGCC = ~0;
DebugLoc dl = Op.getDebugLoc();
LookThroughSetCC(LHS, RHS, CC, ORIGCC);
if (ORIGCC == ~0U) ORIGCC = IntCCToPIC16CC (CC);
SDValue PIC16CC;
SDValue Cmp = getPIC16Cmp(LHS, RHS, ORIGCC, PIC16CC, DAG, dl);
return DAG.getNode(PIC16ISD::BRCOND, dl, MVT::Other, Chain, Dest, PIC16CC,
Cmp.getValue(1));
}