#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
-#include <cstdio>
using namespace llvm;
+static const char *getIntrinsicName(unsigned opcode) {
+ std::string Basename;
+ switch(opcode) {
+ default: assert (0 && "do not know intrinsic name");
+ // Arithmetic Right shift for integer types.
+ case PIC16ISD::SRA_I8: Basename = "sra.i8"; break;
+ case RTLIB::SRA_I16: Basename = "sra.i16"; break;
+ case RTLIB::SRA_I32: Basename = "sra.i32"; break;
+
+ // Left shift for integer types.
+ case PIC16ISD::SLL_I8: Basename = "sll.i8"; break;
+ case RTLIB::SHL_I16: Basename = "sll.i16"; break;
+ case RTLIB::SHL_I32: Basename = "sll.i32"; break;
+
+ // Logical Right Shift for integer types.
+ case PIC16ISD::SRL_I8: Basename = "srl.i8"; break;
+ case RTLIB::SRL_I16: Basename = "srl.i16"; break;
+ case RTLIB::SRL_I32: Basename = "srl.i32"; break;
+
+ // Multiply for integer types.
+ case PIC16ISD::MUL_I8: Basename = "mul.i8"; break;
+ case RTLIB::MUL_I16: Basename = "mul.i16"; break;
+ case RTLIB::MUL_I32: Basename = "mul.i32"; break;
+
+ // Signed division for integers.
+ case RTLIB::SDIV_I16: Basename = "sdiv.i16"; break;
+ case RTLIB::SDIV_I32: Basename = "sdiv.i32"; break;
+
+ // Unsigned division for integers.
+ case RTLIB::UDIV_I16: Basename = "udiv.i16"; break;
+ case RTLIB::UDIV_I32: Basename = "udiv.i32"; break;
+
+ // Signed Modulas for integers.
+ case RTLIB::SREM_I16: Basename = "srem.i16"; break;
+ case RTLIB::SREM_I32: Basename = "srem.i32"; break;
+
+ // Unsigned Modulas for integers.
+ case RTLIB::UREM_I16: Basename = "urem.i16"; break;
+ case RTLIB::UREM_I32: Basename = "urem.i32"; break;
+
+ //////////////////////
+ // LIBCALLS FOR FLOATS
+ //////////////////////
+
+ // Float to signed integrals
+ case RTLIB::FPTOSINT_F32_I8: Basename = "f32_to_si32"; break;
+ case RTLIB::FPTOSINT_F32_I16: Basename = "f32_to_si32"; break;
+ case RTLIB::FPTOSINT_F32_I32: Basename = "f32_to_si32"; break;
+
+ // Signed integrals to float. char and int are first sign extended to i32
+ // before being converted to float, so an I8_F32 or I16_F32 isn't required.
+ case RTLIB::SINTTOFP_I32_F32: Basename = "si32_to_f32"; break;
+
+ // Float to Unsigned conversions.
+ // Signed conversion can be used for unsigned conversion as well.
+ // In signed and unsigned versions only the interpretation of the
+ // MSB is different. Bit representation remains the same.
+ case RTLIB::FPTOUINT_F32_I8: Basename = "f32_to_si32"; break;
+ case RTLIB::FPTOUINT_F32_I16: Basename = "f32_to_si32"; break;
+ case RTLIB::FPTOUINT_F32_I32: Basename = "f32_to_si32"; break;
+
+ // Unsigned to Float conversions. char and int are first zero extended
+ // before being converted to float.
+ case RTLIB::UINTTOFP_I32_F32: Basename = "ui32_to_f32"; break;
+
+ // Floating point add, sub, mul, div.
+ case RTLIB::ADD_F32: Basename = "add.f32"; break;
+ case RTLIB::SUB_F32: Basename = "sub.f32"; break;
+ case RTLIB::MUL_F32: Basename = "mul.f32"; break;
+ case RTLIB::DIV_F32: Basename = "div.f32"; break;
+ }
+
+ std::string prefix = PAN::getTagName(PAN::PREFIX_SYMBOL);
+ std::string tagname = PAN::getTagName(PAN::LIBCALL);
+ std::string Fullname = prefix + tagname + Basename;
+
+ // The name has to live through program life.
+ char *tmp = new char[Fullname.size() + 1];
+ strcpy (tmp, Fullname.c_str());
+
+ return tmp;
+}
// PIC16TargetLowering Constructor.
PIC16TargetLowering::PIC16TargetLowering(PIC16TargetMachine &TM)
- : TargetLowering(TM) {
-
+ : TargetLowering(TM), TmpSize(0) {
+
Subtarget = &TM.getSubtarget<PIC16Subtarget>();
addRegisterClass(MVT::i8, PIC16::GPRRegisterClass);
setShiftAmountFlavor(Extend);
// SRA library call names
- setPIC16LibcallName(PIC16ISD::SRA_I8, "__intrinsics.sra.i8");
- setLibcallName(RTLIB::SRA_I16, "__intrinsics.sra.i16");
- setLibcallName(RTLIB::SRA_I32, "__intrinsics.sra.i32");
+ setPIC16LibcallName(PIC16ISD::SRA_I8, getIntrinsicName(PIC16ISD::SRA_I8));
+ setLibcallName(RTLIB::SRA_I16, getIntrinsicName(RTLIB::SRA_I16));
+ setLibcallName(RTLIB::SRA_I32, getIntrinsicName(RTLIB::SRA_I32));
// SHL library call names
- setPIC16LibcallName(PIC16ISD::SLL_I8, "__intrinsics.sll.i8");
- setLibcallName(RTLIB::SHL_I16, "__intrinsics.sll.i16");
- setLibcallName(RTLIB::SHL_I32, "__intrinsics.sll.i32");
+ setPIC16LibcallName(PIC16ISD::SLL_I8, getIntrinsicName(PIC16ISD::SLL_I8));
+ setLibcallName(RTLIB::SHL_I16, getIntrinsicName(RTLIB::SHL_I16));
+ setLibcallName(RTLIB::SHL_I32, getIntrinsicName(RTLIB::SHL_I32));
// SRL library call names
- setPIC16LibcallName(PIC16ISD::SRL_I8, "__intrinsics.srl.i8");
- setLibcallName(RTLIB::SRL_I16, "__intrinsics.srl.i16");
- setLibcallName(RTLIB::SRL_I32, "__intrinsics.srl.i32");
+ setPIC16LibcallName(PIC16ISD::SRL_I8, getIntrinsicName(PIC16ISD::SRL_I8));
+ setLibcallName(RTLIB::SRL_I16, getIntrinsicName(RTLIB::SRL_I16));
+ setLibcallName(RTLIB::SRL_I32, getIntrinsicName(RTLIB::SRL_I32));
// MUL Library call names
- setPIC16LibcallName(PIC16ISD::MUL_I8, "__intrinsics.mul.i8");
- setLibcallName(RTLIB::MUL_I16, "__intrinsics.mul.i16");
- setLibcallName(RTLIB::MUL_I32, "__intrinsics.mul.i32");
+ setPIC16LibcallName(PIC16ISD::MUL_I8, getIntrinsicName(PIC16ISD::MUL_I8));
+ setLibcallName(RTLIB::MUL_I16, getIntrinsicName(RTLIB::MUL_I16));
+ setLibcallName(RTLIB::MUL_I32, getIntrinsicName(RTLIB::MUL_I32));
+
+ // Signed division lib call names
+ setLibcallName(RTLIB::SDIV_I16, getIntrinsicName(RTLIB::SDIV_I16));
+ setLibcallName(RTLIB::SDIV_I32, getIntrinsicName(RTLIB::SDIV_I32));
+
+ // Unsigned division lib call names
+ setLibcallName(RTLIB::UDIV_I16, getIntrinsicName(RTLIB::UDIV_I16));
+ setLibcallName(RTLIB::UDIV_I32, getIntrinsicName(RTLIB::UDIV_I32));
+
+ // Signed remainder lib call names
+ setLibcallName(RTLIB::SREM_I16, getIntrinsicName(RTLIB::SREM_I16));
+ setLibcallName(RTLIB::SREM_I32, getIntrinsicName(RTLIB::SREM_I32));
+
+ // Unsigned remainder lib call names
+ setLibcallName(RTLIB::UREM_I16, getIntrinsicName(RTLIB::UREM_I16));
+ setLibcallName(RTLIB::UREM_I32, getIntrinsicName(RTLIB::UREM_I32));
+
+ // Floating point to signed int conversions.
+ setLibcallName(RTLIB::FPTOSINT_F32_I8,
+ getIntrinsicName(RTLIB::FPTOSINT_F32_I8));
+ setLibcallName(RTLIB::FPTOSINT_F32_I16,
+ getIntrinsicName(RTLIB::FPTOSINT_F32_I16));
+ setLibcallName(RTLIB::FPTOSINT_F32_I32,
+ getIntrinsicName(RTLIB::FPTOSINT_F32_I32));
+
+ // Signed int to floats.
+ setLibcallName(RTLIB::SINTTOFP_I32_F32,
+ getIntrinsicName(RTLIB::SINTTOFP_I32_F32));
+
+ // Floating points to unsigned ints.
+ setLibcallName(RTLIB::FPTOUINT_F32_I8,
+ getIntrinsicName(RTLIB::FPTOUINT_F32_I8));
+ setLibcallName(RTLIB::FPTOUINT_F32_I16,
+ getIntrinsicName(RTLIB::FPTOUINT_F32_I16));
+ setLibcallName(RTLIB::FPTOUINT_F32_I32,
+ getIntrinsicName(RTLIB::FPTOUINT_F32_I32));
+
+ // Unsigned int to floats.
+ setLibcallName(RTLIB::UINTTOFP_I32_F32,
+ getIntrinsicName(RTLIB::UINTTOFP_I32_F32));
+
+ // Floating point add, sub, mul ,div.
+ setLibcallName(RTLIB::ADD_F32, getIntrinsicName(RTLIB::ADD_F32));
+ setLibcallName(RTLIB::SUB_F32, getIntrinsicName(RTLIB::SUB_F32));
+ setLibcallName(RTLIB::MUL_F32, getIntrinsicName(RTLIB::MUL_F32));
+ setLibcallName(RTLIB::DIV_F32, getIntrinsicName(RTLIB::DIV_F32));
setOperationAction(ISD::GlobalAddress, MVT::i16, Custom);
setOperationAction(ISD::ExternalSymbol, MVT::i16, Custom);
setOperationAction(ISD::ADDC, MVT::i8, Custom);
setOperationAction(ISD::SUBE, MVT::i8, Custom);
setOperationAction(ISD::SUBC, MVT::i8, Custom);
+ setOperationAction(ISD::SUB, MVT::i8, Custom);
setOperationAction(ISD::ADD, MVT::i8, Custom);
setOperationAction(ISD::ADD, MVT::i16, Custom);
computeRegisterProperties();
}
+// getOutFlag - Extract the flag result if the Op has it.
+static SDValue getOutFlag(SDValue &Op) {
+ // Flag is the last value of the node.
+ SDValue Flag = Op.getValue(Op.getNode()->getNumValues() - 1);
+
+ assert (Flag.getValueType() == MVT::Flag
+ && "Node does not have an out Flag");
+
+ return Flag;
+}
+// Get the TmpOffset for FrameIndex
+unsigned PIC16TargetLowering::GetTmpOffsetForFI(unsigned FI, unsigned size) {
+ std::map<unsigned, unsigned>::iterator
+ MapIt = FiTmpOffsetMap.find(FI);
+ if (MapIt != FiTmpOffsetMap.end())
+ return MapIt->second;
+
+ // This FI (FrameIndex) is not yet mapped, so map it
+ FiTmpOffsetMap[FI] = TmpSize;
+ TmpSize += size;
+ return FiTmpOffsetMap[FI];
+}
+
+// To extract chain value from the SDValue Nodes
+// This function will help to maintain the chain extracting
+// code at one place. In case of any change in future it will
+// help maintain the code.
+static SDValue getChain(SDValue &Op) {
+ SDValue Chain = Op.getValue(Op.getNode()->getNumValues() - 1);
+
+ // If the last value returned in Flag then the chain is
+ // second last value returned.
+ if (Chain.getValueType() == MVT::Flag)
+ Chain = Op.getValue(Op.getNode()->getNumValues() - 2);
+
+ // All nodes may not produce a chain. Therefore following assert
+ // verifies that the node is returning a chain only.
+ assert (Chain.getValueType() == MVT::Other
+ && "Node does not have a chain");
+
+ return Chain;
+}
+
+/// PopulateResults - Helper function to LowerOperation.
+/// If a node wants to return multiple results after lowering,
+/// it stuffs them into an array of SDValue called Results.
+
static void PopulateResults(SDValue N, SmallVectorImpl<SDValue>&Results) {
if (N.getOpcode() == ISD::MERGE_VALUES) {
int NumResults = N.getNumOperands();
return MVT::i8;
}
+/// The type legalizer framework of generating legalizer can generate libcalls
+/// only when the operand/result types are illegal.
+/// PIC16 needs to generate libcalls even for the legal types (i8) for some ops.
+/// For example an arithmetic right shift. These functions are used to lower
+/// such operations that generate libcall for legal types.
void
PIC16TargetLowering::setPIC16LibcallName(PIC16ISD::PIC16Libcall Call,
const char *Name) {
- PIC16LibcallNames[Call] = Name;
+ PIC16LibcallNames[Call] = Name;
}
const char *
PIC16TargetLowering::getPIC16LibcallName(PIC16ISD::PIC16Libcall Call) {
- return PIC16LibcallNames[Call];
+ return PIC16LibcallNames[Call];
}
SDValue
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;
-}
+ TargetLowering::ArgListTy Args;
+ Args.reserve(NumOps);
-SDValue
-PIC16TargetLowering::getCurrentFrame(SelectionDAG &DAG) {
- MachineFunction &MF = DAG.getMachineFunction();
- const Function *Func = MF.getFunction();
- const std::string FuncName = Func->getName();
-
- // this is causing memory waste
- // because for every call new memory will be allocated
- char *tmpName = new char [strlen(FuncName.c_str()) + 6];
- sprintf(tmpName, "%s.tmp", FuncName.c_str());
-
- // if the external symbol of the same name already exists then
- // it will not create the new one.
- return DAG.getTargetExternalSymbol(tmpName, MVT::i8);
-}
+ 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);
-void
-PIC16TargetLowering::getCurrentFrameIndex(SelectionDAG &DAG, SDValue &ES,
- unsigned SlotSize, int &FromFI) {
- MachineFunction &MF = DAG.getMachineFunction();
- const Function *Func = MF.getFunction();
- const std::string FuncName = Func->getName();
+ 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);
- // this is causing memory waste
- // because for every call new memory will be allocated
- char *tmpName = new char [strlen(FuncName.c_str()) + 6];
- sprintf(tmpName, "%s.tmp", FuncName.c_str());
-
- // if the external symbol of the same name already exists then
- // it will not create the new one.
- ES = DAG.getTargetExternalSymbol(tmpName, MVT::i8);
-
- // Alignment is always 1
- //FromFI = MF.getFrameInfo()->CreateStackObject(SlotSize, 1);
- FromFI = MF.getFrameInfo()->CreateStackObject(1, 1);
- int FI;
- for(unsigned i=1;i<SlotSize; ++i) {
- FI = MF.getFrameInfo()->CreateStackObject(1, 1);
- }
+ return CallInfo.first;
}
const char *PIC16TargetLowering::getTargetNodeName(unsigned Opcode) const {
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::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";
FrameIndexSDNode *FR = dyn_cast<FrameIndexSDNode>(SDValue(N,0));
// FIXME there isn't really debug info here
DebugLoc dl = FR->getDebugLoc();
- int Index = FR->getIndex();
- SDValue FI[2];
- FI[0] = DAG.getTargetFrameIndex(Index, MVT::i8);
- FI[1] = DAG.getTargetFrameIndex(Index + 1, MVT::i8);
- return DAG.getNode(ISD::BUILD_PAIR, dl, N->getValueType(0), FI[0], FI[1]);
+ // Expand FrameIndex like GlobalAddress and ExternalSymbol
+ // Also use Offset field for lo and hi parts. The default
+ // offset is zero.
+
+ SDValue ES;
+ int FrameOffset;
+ SDValue FI = SDValue(N,0);
+ LegalizeFrameIndex(FI, DAG, ES, FrameOffset);
+ SDValue Offset = DAG.getConstant(FrameOffset, MVT::i8);
+ SDValue Lo = DAG.getNode(PIC16ISD::Lo, dl, MVT::i8, ES, Offset);
+ SDValue Hi = DAG.getNode(PIC16ISD::Hi, dl, MVT::i8, ES, Offset);
+ return DAG.getNode(ISD::BUILD_PAIR, dl, N->getValueType(0), Lo, Hi);
}
DebugLoc dl = N->getDebugLoc();
SDValue PtrLo, PtrHi;
- LegalizeAddress(Ptr, DAG, PtrLo, PtrHi, StoreOffset);
+ LegalizeAddress(Ptr, DAG, PtrLo, PtrHi, StoreOffset, dl);
if (ValueType == MVT::i8) {
return DAG.getNode (PIC16ISD::PIC16Store, dl, MVT::Other, Chain, Src,
DebugLoc dl = ES->getDebugLoc();
SDValue TES = DAG.getTargetExternalSymbol(ES->getSymbol(), MVT::i8);
-
- SDValue Lo = DAG.getNode(PIC16ISD::Lo, dl, MVT::i8, TES);
- SDValue Hi = DAG.getNode(PIC16ISD::Hi, dl, MVT::i8, TES);
+ 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 TGA = DAG.getTargetGlobalAddress(G->getGlobal(), MVT::i8,
G->getOffset());
- SDValue Lo = DAG.getNode(PIC16ISD::Lo, dl, MVT::i8, TGA);
- SDValue Hi = DAG.getNode(PIC16ISD::Hi, dl, MVT::i8, TGA);
+ 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);
}
// It is BUILD_PAIR((PIC16Lo TGA), (PIC16Hi TGA)) and Op is BUILD_PAIR
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)
+ if (GSDN->getAddressSpace() == PIC16ISD::ROM_SPACE)
return true;
// Any other address space return it false
return false;
}
-// Extract the out flag
-SDValue PIC16TargetLowering::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;
-}
-
-// To extract chain value from the SDValue Nodes
-// This function will help to maintain the chain extracting
-// code at one place. In case of any change in future it will
-// help maintain the code.
-SDValue PIC16TargetLowering::getChain(SDValue &Op) {
- SDValue Chain = Op.getValue(Op.getNode()->getNumValues() - 1);
-
- // If the last value returned in Flag then the chain is
- // second last value returned.
- if (Chain.getValueType() == MVT::Flag)
- Chain = Op.getValue(Op.getNode()->getNumValues() - 2);
-
- // All nodes may not produce a chain. Therefore following assert
- // verifies that the node is returning a chain only.
- assert (Chain.getValueType() == MVT::Other && "Node does not have a chain");
-
- return Chain;
-}
+// GetExpandedParts - This function is on the similiar lines as
+// the GetExpandedInteger in type legalizer is. This returns expanded
+// parts of Op in Lo and Hi.
void PIC16TargetLowering::GetExpandedParts(SDValue Op, SelectionDAG &DAG,
SDValue &Lo, SDValue &Hi) {
SDNode *N = Op.getNode();
DebugLoc dl = N->getDebugLoc();
- MVT NewVT;
- std::vector<SDValue> Opers;
- NewVT = getTypeToTransformTo(N->getValueType(0));
-
- // extract the lo component
- Opers.push_back(Op);
- Opers.push_back(DAG.getConstant(0,MVT::i8));
- Lo = DAG.getNode(ISD::EXTRACT_ELEMENT,dl,NewVT,&Opers[0],Opers.size());
+ MVT NewVT = getTypeToTransformTo(N->getValueType(0));
+
+ // Extract the lo component.
+ Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, NewVT, Op,
+ DAG.getConstant(0, MVT::i8));
+
// extract the hi component
- Opers.clear();
- Opers.push_back(Op);
- Opers.push_back(DAG.getConstant(1,MVT::i8));
- Hi = DAG.getNode(ISD::EXTRACT_ELEMENT,dl,NewVT,&Opers[0],Opers.size());
+ Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, NewVT, Op,
+ DAG.getConstant(1, MVT::i8));
}
// Legalize FrameIndex into ExternalSymbol and offset.
MachineFunction &MF = DAG.getMachineFunction();
const Function *Func = MF.getFunction();
+ MachineFrameInfo *MFI = MF.getFrameInfo();
const std::string Name = Func->getName();
- char *tmpName = new char [strlen(Name.c_str()) + 8];
- sprintf(tmpName, "%s.args", Name.c_str());
- ES = DAG.getTargetExternalSymbol(tmpName, MVT::i8);
FrameIndexSDNode *FR = dyn_cast<FrameIndexSDNode>(Op);
- Offset = FR->getIndex();
+
+ // FrameIndices are not stack offsets. But they represent the request
+ // for space on stack. That space requested may be more than one byte.
+ // Therefore, to calculate the stack offset that a FrameIndex aligns
+ // with, we need to traverse all the FrameIndices available earlier in
+ // the list and add their requested size.
+ unsigned FIndex = FR->getIndex();
+ const char *tmpName;
+ if (FIndex < ReservedFrameCount) {
+ tmpName = createESName(PAN::getFrameLabel(Name));
+ ES = DAG.getTargetExternalSymbol(tmpName, MVT::i8);
+ Offset = 0;
+ for (unsigned i=0; i<FIndex ; ++i) {
+ Offset += MFI->getObjectSize(i);
+ }
+ } else {
+ // FrameIndex has been made for some temporary storage
+ tmpName = createESName(PAN::getTempdataLabel(Name));
+ ES = DAG.getTargetExternalSymbol(tmpName, MVT::i8);
+ Offset = GetTmpOffsetForFI(FIndex, MFI->getObjectSize(FIndex));
+ }
return;
}
// and non-constant operand of ADD will be treated as pointer.
// Returns the high and lo part of the address, and the offset(in case of ADD).
-void PIC16TargetLowering:: LegalizeAddress(SDValue Ptr, SelectionDAG &DAG,
- SDValue &Lo, SDValue &Hi,
- unsigned &Offset) {
+void PIC16TargetLowering::LegalizeAddress(SDValue Ptr, SelectionDAG &DAG,
+ SDValue &Lo, SDValue &Hi,
+ unsigned &Offset, DebugLoc dl) {
// Offset, by default, should be 0
Offset = 0;
}
}
- if (Ptr.getOpcode() == ISD::BUILD_PAIR &&
- Ptr.getOperand(0).getOpcode() == ISD::TargetFrameIndex) {
-
- int FrameOffset;
- LegalizeFrameIndex(Ptr.getOperand(0), DAG, Lo, FrameOffset);
- Hi = DAG.getConstant(1, MVT::i8);
- Offset += FrameOffset;
- return;
+ // Expansion of FrameIndex has Lo/Hi parts
+ if (isDirectAddress(Ptr)) {
+ SDValue TFI = Ptr.getOperand(0).getOperand(0);
+ int FrameOffset;
+ if (TFI.getOpcode() == ISD::TargetFrameIndex) {
+ LegalizeFrameIndex(TFI, DAG, Lo, FrameOffset);
+ Hi = DAG.getConstant(1, MVT::i8);
+ Offset += FrameOffset;
+ return;
+ } else if (TFI.getOpcode() == ISD::TargetExternalSymbol) {
+ // FrameIndex has already been expanded.
+ // Now just make use of its expansion
+ Lo = TFI;
+ Hi = DAG.getConstant(1, MVT::i8);
+ SDValue FOffset = Ptr.getOperand(0).getOperand(1);
+ assert (FOffset.getOpcode() == ISD::Constant &&
+ "Invalid operand of PIC16ISD::Lo");
+ Offset += dyn_cast<ConstantSDNode>(FOffset)->getZExtValue();
+ return;
+ }
}
if (isDirectAddress(Ptr) && !isRomAddress(Ptr)) {
GetExpandedParts(Ptr, DAG, Lo, Hi);
// Put the hi and lo parts into FSR.
- Lo = DAG.getNode(PIC16ISD::MTLO, MVT::i8, Lo);
- Hi = DAG.getNode(PIC16ISD::MTHI, MVT::i8, Hi);
+ Lo = DAG.getNode(PIC16ISD::MTLO, dl, MVT::i8, Lo);
+ Hi = DAG.getNode(PIC16ISD::MTHI, dl, MVT::i8, Hi);
return;
}
-//SDValue PIC16TargetLowering::ExpandAdd(SDNode *N, SelectionDAG &DAG) {
- //SDValue OperLeft = N->getOperand(0);
- //SDValue OperRight = N->getOperand(1);
-
- //if((OperLeft.getOpcode() == ISD::Constant) ||
- //(OperRight.getOpcode() == ISD::Constant)) {
- //return SDValue();
- //}
-
- // These case are yet to be handled
- //return SDValue();
-//}
-
SDValue PIC16TargetLowering::ExpandLoad(SDNode *N, SelectionDAG &DAG) {
LoadSDNode *LD = dyn_cast<LoadSDNode>(SDValue(N, 0));
SDValue Chain = LD->getChain();
// Legalize direct/indirect addresses. This will give the lo and hi parts
// of the address and the offset.
- LegalizeAddress(Ptr, DAG, PtrLo, PtrHi, LoadOffset);
+ LegalizeAddress(Ptr, DAG, PtrLo, PtrHi, LoadOffset, dl);
// Load from the pointer (direct address or FSR)
VT = N->getValueType(0);
for (iter=MemBytes; iter<ExtdBytes; ++iter) {
PICLoads.push_back(SRA);
}
- } else if (ISD::isZEXTLoad(N)) {
+ } else if (ISD::isZEXTLoad(N) || ISD::isEXTLoad(N)) {
+ //} else if (ISD::isZEXTLoad(N)) {
// ZeroExtendedLoad -- For all ExtdBytes use constant 0
SDValue ConstZero = DAG.getConstant(0, MVT::i8);
for (iter=MemBytes; iter<ExtdBytes; ++iter) {
const Function *Func = MF.getFunction();
const std::string FuncName = Func->getName();
- char *tmpName = new char [strlen(FuncName.c_str()) + 6];
// Put the value on stack.
// Get a stack slot index and convert to es.
int FI = MF.getFrameInfo()->CreateStackObject(1, 1);
- sprintf(tmpName, "%s.tmp", FuncName.c_str());
+ const char *tmpName = createESName(PAN::getTempdataLabel(FuncName));
SDValue ES = DAG.getTargetExternalSymbol(tmpName, MVT::i8);
// Store the value to ES.
DAG.getEntryNode(),
Op, ES,
DAG.getConstant (1, MVT::i8), // Banksel.
- DAG.getConstant (FI, MVT::i8));
+ DAG.getConstant (GetTmpOffsetForFI(FI, 1),
+ MVT::i8));
// Load the value from ES.
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 (FI, MVT::i8));
+ DAG.getConstant (GetTmpOffsetForFI(FI, 1),
+ MVT::i8));
return Load.getValue(0);
}
-
-SDValue
-PIC16TargetLowering::LowerCallArguments(SDValue Op, SDValue Chain,
- SDValue FrameAddress,
- SDValue InFlag,
- SelectionDAG &DAG) {
+
+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 call has no arguments then do nothing and return.
+ if (NumOps == 0)
+ return Chain;
+
+ std::vector<SDValue> Ops;
+ SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Flag);
+ SDValue Arg, StoreRet;
+
+ // For PIC16 ABI the arguments come after the return value.
+ unsigned RetVals = TheCall->getNumRetVals();
+ for (unsigned i = 0, ArgOffset = RetVals; i < NumOps; i++) {
+ // Get the arguments
+ 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 call has no arguments then do nothing and return.
+ if (NumOps == 0)
+ return Chain;
// FIXME: This portion of code currently assumes only
// primitive types being passed as arguments.
SDValue PtrLo, PtrHi;
unsigned AddressOffset;
int StoreOffset = 0;
- LegalizeAddress(FrameAddress, DAG, PtrLo, PtrHi, AddressOffset);
+ LegalizeAddress(ArgLabel, DAG, PtrLo, PtrHi, AddressOffset, dl);
SDValue StoreRet;
std::vector<SDValue> Ops;
for (unsigned i=ArgCount, Offset = 0; i<NumOps; i++) {
// Get the argument
Arg = TheCall->getArg(i);
-
StoreOffset = (Offset + AddressOffset);
// Store the argument on frame
Ops.clear();
Ops.push_back(Chain);
- Ops.push_back(Arg.getValue(0));
+ 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, Tys, &Ops[0], Ops.size());
+ StoreRet = DAG.getNode (PIC16ISD::PIC16StWF, dl, Tys, &Ops[0], Ops.size());
Chain = getChain(StoreRet);
InFlag = getOutFlag(StoreRet);
return Chain;
}
-SDValue
-PIC16TargetLowering::LowerCallReturn(SDValue Op, SDValue Chain,
- SDValue FrameAddress,
- SDValue InFlag,
- SelectionDAG &DAG) {
+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 call does not have anything to return
+ // then do nothing and go back.
+ if (RetVals == 0)
+ return Chain;
+
+ // Call has something to return
+ 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();
// Currently handling primitive types only. They will come in
// Legalize the address before use
SDValue LdLo, LdHi;
unsigned LdOffset;
- LegalizeAddress(FrameAddress, DAG, LdLo, LdHi, LdOffset);
+ LegalizeAddress(RetLabel, DAG, LdLo, LdHi, LdOffset, dl);
SDVTList Tys = DAG.getVTList(MVT::i8, MVT::Other, MVT::Flag);
SDValue LoadRet;
}
SDValue PIC16TargetLowering::LowerRET(SDValue Op, SelectionDAG &DAG) {
- //int NumOps = Op.getNode()->getNumOperands();
+ SDValue Chain = Op.getOperand(0);
+ DebugLoc dl = Op.getDebugLoc();
+
+ if (Op.getNumOperands() == 1) // return void
+ return Op;
- // For default cases LLVM returns the value on the function frame
- // So let LLVM do this for all the cases other than character
- return Op;
+ // return should have odd number of operands
+ if ((Op.getNumOperands() % 2) == 0 ) {
+ assert(0 && "Do not know how to return this many arguments!");
+ abort();
+ }
+
+ // Number of values to return
+ unsigned NumRet = (Op.getNumOperands() / 2);
+
+ // Function returns value always on stack with the offset starting
+ // from 0
+ MachineFunction &MF = DAG.getMachineFunction();
+ const Function *F = MF.getFunction();
+ std::string FuncName = F->getName();
+
+ const char *tmpName = createESName(PAN::getFrameLabel(FuncName));
+ 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::LowerCALL(SDValue Op, SelectionDAG &DAG) {
+// CALL node may have some operands non-legal to PIC16. Generate new CALL
+// node with all the operands legal.
+// Currently only Callee operand of the CALL node is non-legal. This function
+// legalizes the Callee operand and uses all other operands as are to generate
+// new CALL node.
+
+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;
- if (Callee.getValueType() == MVT::i16 &&
- Callee.getOpcode() == ISD::BUILD_PAIR) {
- // It has come from TypeLegalizer for lowering
- Callee = Callee.getOperand(0).getOperand(0);
-
- std::vector<SDValue> Ops;
- Ops.push_back(Chain);
- Ops.push_back(Callee);
+ 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)) {
+ // Come here for direct calls
+ Callee = Callee.getOperand(0).getOperand(0);
+ } else {
+ // Come here for indirect calls
+ SDValue Lo, Hi;
+ // Indirect addresses. Get the hi and lo parts of ptr.
+ GetExpandedParts(Callee, DAG, Lo, Hi);
+ // Connect Lo and Hi parts of the callee with the PIC16Connect
+ Callee = DAG.getNode(PIC16ISD::PIC16Connect, dl, MVT::i8, Lo, Hi);
+ }
+ std::vector<SDValue> Ops;
+ Ops.push_back(Chain);
+ Ops.push_back(Callee);
- // Add the call arguments and their flags
- unsigned NumArgs = TheCall->getNumArgs();
- for(i=0;i<NumArgs;i++) {
- Ops.push_back(TheCall->getArg(i));
- Ops.push_back(TheCall->getArgFlagsVal(i));
- }
+ // Add the call arguments and their flags
+ 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));
- std::vector<MVT> NodeTys;
- unsigned NumRets = TheCall->getNumRetVals();
- for(i=0;i<NumRets;i++)
- NodeTys.push_back(TheCall->getRetValType(i));
+ // Return a Chain as well
+ NodeTys.push_back(MVT::Other);
+
+ SDVTList VTs = DAG.getVTList(&NodeTys[0], NodeTys.size());
+ // Generate new call with all the operands legal
+ return DAG.getCall(TheCall->getCallingConv(), dl,
+ TheCall->isVarArg(), TheCall->isTailCall(),
+ TheCall->isInreg(), VTs, &Ops[0], Ops.size());
+}
- // Return a Chain as well
- NodeTys.push_back(MVT::Other);
+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); // To manage the data dependency
+
+ // Get the Lo and Hi part of code address
+ 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);
+ // Subtract 2 from Address to get the Lower part of DataAddress.
+ SDVTList VTList = DAG.getVTList(MVT::i8, MVT::Flag);
+ Data_Lo = DAG.getNode(ISD::SUBC, dl, VTList, Lo,
+ DAG.getConstant(2, MVT::i8));
+ SDValue Ops[3] = { Hi, DAG.getConstant(0, MVT::i8), Data_Lo.getValue(1)};
+ Data_Hi = DAG.getNode(ISD::SUBE, dl, VTList, Ops, 3);
+ SDValue PCLATH = DAG.getNode(PIC16ISD::MTPCLATH, dl, MVT::i8, Data_Hi);
+ Callee = DAG.getNode(PIC16ISD::PIC16Connect, dl, MVT::i8, Data_Lo, PCLATH);
+ 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);
+
+ // Low part of Data Address
+ DataAddr_Lo = DAG.getNode(PIC16ISD::MTLO, dl, MVT::i8, Call, OperFlag);
+
+ // Make the second call.
+ SeqStart = DAG.getCALLSEQ_START(Chain, ZeroOperand);
+ Chain = getChain(SeqStart);
+ OperFlag = getOutFlag(SeqStart); // To manage the data dependency
+
+ // Subtract 1 from Address to get high part of data address.
+ Data_Lo = DAG.getNode(ISD::SUBC, dl, VTList, Lo,
+ DAG.getConstant(1, MVT::i8));
+ SDValue HiOps[3] = { Hi, DAG.getConstant(0, MVT::i8), Data_Lo.getValue(1)};
+ Data_Hi = DAG.getNode(ISD::SUBE, dl, VTList, HiOps, 3);
+ PCLATH = DAG.getNode(PIC16ISD::MTPCLATH, dl, MVT::i8, Data_Hi);
+
+ // Use new Lo to make another CALLW
+ Callee = DAG.getNode(PIC16ISD::PIC16Connect, dl, MVT::i8, Data_Lo, PCLATH);
+ 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);
+ // Hi part of Data Address
+ DataAddr_Hi = DAG.getNode(PIC16ISD::MTHI, dl, MVT::i8, Call, OperFlag);
+}
- SDVTList VTs = DAG.getVTList(&NodeTys[0], NodeTys.size());
- SDValue NewCall =
- DAG.getCall(TheCall->getCallingConv(), dl,
- TheCall->isVarArg(), TheCall->isTailCall(),
- TheCall->isInreg(), VTs, &Ops[0], Ops.size());
- return NewCall;
+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) {
+ // Control should come here only from TypeLegalizer for lowering
+
+ // Legalize the non-legal arguments of call and return the
+ // new call with legal arguments.
+ return LegalizeCALL(Op, DAG);
}
+ // Control should come here from Legalize DAG.
+ // Here all the operands of CALL node should be legal.
+ // If this is an indirect call then to pass the arguments
+ // and read the return value back, we need the data address
+ // of the function being called.
+ // To get the data address two more calls need to be made.
+
+ // The flag to track if this is a direct or indirect call.
+ bool IsDirectCall = true;
+ unsigned RetVals = TheCall->getNumRetVals();
+ unsigned NumArgs = TheCall->getNumArgs();
+
+ SDValue DataAddr_Lo, DataAddr_Hi;
+ if (Callee.getOpcode() == PIC16ISD::PIC16Connect) {
+ IsDirectCall = false; // This is indirect call
+ // Read DataAddress only if we have to pass arguments or
+ // read return value.
+ if ((RetVals > 0) || (NumArgs > 0))
+ GetDataAddress(dl, Callee, Chain, DataAddr_Lo, DataAddr_Hi, DAG);
+ }
+
SDValue ZeroOperand = DAG.getConstant(0, MVT::i8);
// Start the call sequence.
// because there is nothing else to carry.
SDValue SeqStart = DAG.getCALLSEQ_START(Chain, ZeroOperand);
Chain = getChain(SeqStart);
+ SDValue OperFlag = getOutFlag(SeqStart); // To manage the data dependency
+ std::string Name;
// For any direct call - callee will be GlobalAddressNode or
// ExternalSymbol
-
- // Considering the GlobalAddressNode case here.
- if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
- GlobalValue *GV = G->getGlobal();
- Callee = DAG.getTargetGlobalAddress(GV, MVT::i8);
- }
-
- // Considering the ExternalSymbol case here
- if (ExternalSymbolSDNode *ES = dyn_cast<ExternalSymbolSDNode>(Callee)) {
- Callee = DAG.getTargetExternalSymbol(ES->getSymbol(), MVT::i8);
- }
-
- SDValue OperFlag = getOutFlag(Chain); // To manage the data dependency
-
- std::string Name;
-
- // Considering GlobalAddress here
- if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee))
- Name = G->getGlobal()->getName();
-
- // Considering ExternalSymbol here
- if (ExternalSymbolSDNode *ES = dyn_cast<ExternalSymbolSDNode>(Callee))
- Name = ES->getSymbol();
-
- char *argFrame = new char [strlen(Name.c_str()) + 8];
- sprintf(argFrame, "%s.args", Name.c_str());
- SDValue ArgLabel = DAG.getTargetExternalSymbol(argFrame, MVT::i8);
-
- char *retName = new char [strlen(Name.c_str()) + 8];
- sprintf(retName, "%s.retval", Name.c_str());
- SDValue RetLabel = DAG.getTargetExternalSymbol(retName, MVT::i8);
+ SDValue ArgLabel, RetLabel;
+ if (IsDirectCall) {
+ // Considering the GlobalAddressNode case here.
+ if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
+ GlobalValue *GV = G->getGlobal();
+ Callee = DAG.getTargetGlobalAddress(GV, MVT::i8);
+ Name = G->getGlobal()->getName();
+ } else {// Considering the ExternalSymbol case here
+ ExternalSymbolSDNode *ES = dyn_cast<ExternalSymbolSDNode>(Callee);
+ Callee = DAG.getTargetExternalSymbol(ES->getSymbol(), MVT::i8);
+ Name = ES->getSymbol();
+ }
+
+ // Label for argument passing
+ const char *argFrame = createESName(PAN::getArgsLabel(Name));
+ ArgLabel = DAG.getTargetExternalSymbol(argFrame, MVT::i8);
+
+ // Label for reading return value
+ const char *retName = createESName(PAN::getRetvalLabel(Name));
+ RetLabel = DAG.getTargetExternalSymbol(retName, MVT::i8);
+ } else {
+ // if indirect call
+ SDValue CodeAddr_Lo = Callee.getOperand(0);
+ SDValue CodeAddr_Hi = Callee.getOperand(1);
+
+ /*CodeAddr_Lo = DAG.getNode(ISD::ADD, dl, MVT::i8, CodeAddr_Lo,
+ DAG.getConstant(2, MVT::i8));*/
+
+ // move Hi part in PCLATH
+ CodeAddr_Hi = DAG.getNode(PIC16ISD::MTPCLATH, dl, MVT::i8, CodeAddr_Hi);
+ Callee = DAG.getNode(PIC16ISD::PIC16Connect, dl, MVT::i8, CodeAddr_Lo,
+ CodeAddr_Hi);
+ }
// Pass the argument to function before making the call.
- SDValue CallArgs = LowerCallArguments(Op, Chain, ArgLabel, OperFlag, DAG);
- Chain = getChain(CallArgs);
- OperFlag = getOutFlag(CallArgs);
+ 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 = getOutFlag(SeqEnd);
// Lower the return value reading after the call.
- return LowerCallReturn(Op, Chain, RetLabel, OperFlag, DAG);
+ 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) {
return false;
}
+// NeedToConvertToMemOp - Returns true if one of the operands of the
+// operation 'Op' needs to be put into memory. Also returns the
+// operand no. of the operand to be converted in 'MemOp'. Remember, PIC16 has
+// no instruction that can operation on two registers. Most insns take
+// one register and one memory operand (addwf) / Constant (addlw).
bool PIC16TargetLowering::NeedToConvertToMemOp(SDValue Op, unsigned &MemOp) {
- // Return false if one of the operands is already a direct
- // load and that operand has only one use.
+ // If one of the operand is a constant, return false.
if (Op.getOperand(0).getOpcode() == ISD::Constant ||
Op.getOperand(1).getOpcode() == ISD::Constant)
return false;
+
+ // Return false if one of the operands is already a direct
+ // load and that operand has only one use.
if (isDirectLoad(Op.getOperand(0))) {
if (Op.getOperand(0).hasOneUse())
return false;
return true;
}
-SDValue PIC16TargetLowering:: LowerBinOp(SDValue Op, SelectionDAG &DAG) {
+// LowerBinOp - Lower a commutative binary operation that does not
+// affect status flag carry.
+SDValue PIC16TargetLowering::LowerBinOp(SDValue Op, SelectionDAG &DAG) {
DebugLoc dl = Op.getDebugLoc();
+
// We should have handled larger operands in type legalizer itself.
assert (Op.getValueType() == MVT::i8 && "illegal Op to lower");
+
unsigned MemOp = 1;
if (NeedToConvertToMemOp(Op, MemOp)) {
// Put one value on stack.
}
}
-SDValue PIC16TargetLowering:: LowerADD(SDValue Op, SelectionDAG &DAG) {
+// LowerADD - Lower all types of ADD operations including the ones
+// that affects carry.
+SDValue PIC16TargetLowering::LowerADD(SDValue Op, SelectionDAG &DAG) {
// We should have handled larger operands in type legalizer itself.
assert (Op.getValueType() == MVT::i8 && "illegal add to lower");
DebugLoc dl = Op.getDebugLoc();
// Put one value on stack.
SDValue NewVal = ConvertToMemOperand (Op.getOperand(MemOp), DAG, dl);
+ // ADDC and ADDE produce two results.
SDVTList Tys = DAG.getVTList(MVT::i8, MVT::Flag);
+ // ADDE has three operands, the last one is the carry bit.
if (Op.getOpcode() == ISD::ADDE)
return DAG.getNode(Op.getOpcode(), dl, Tys, Op.getOperand(MemOp ^ 1),
NewVal, Op.getOperand(2));
- else
+ // ADDC has two operands.
+ else if (Op.getOpcode() == ISD::ADDC)
return DAG.getNode(Op.getOpcode(), dl, Tys, Op.getOperand(MemOp ^ 1),
NewVal);
+ // ADD it is. It produces only one result.
+ else
+ return DAG.getNode(Op.getOpcode(), dl, MVT::i8, Op.getOperand(MemOp ^ 1),
+ NewVal);
}
- else if (Op.getOpcode() == ISD::ADD) {
+ else
return Op;
- }
- else {
- return SDValue();
- }
}
SDValue PIC16TargetLowering::LowerSUB(SDValue Op, SelectionDAG &DAG) {
// Nothing to do if the first operand is already a direct load and it has
// only one use.
if (isDirectLoad(Op.getOperand(0)) && Op.getOperand(0).hasOneUse())
- return SDValue();
+ return Op;
// Put first operand on stack.
SDValue NewVal = ConvertToMemOperand (Op.getOperand(0), DAG, dl);
return DAG.getNode(Op.getOpcode(), dl, Tys, NewVal, Op.getOperand(1));
}
-// LowerFORMAL_ARGUMENTS - In Lowering FORMAL ARGUMENTS - MERGE_VALUES nodes
-// is returned. MERGE_VALUES nodes number of operands and number of values are
-// equal. Therefore to construct MERGE_VALUE node, UNDEF nodes equal to the
-// number of arguments of function have been created.
+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;
+}
+
+// LowerFORMAL_ARGUMENTS - Argument values are loaded from the
+// <fname>.args + offset. All arguments are already broken to leaglized
+// types, so the offset just runs from 0 to NumArgVals - 1.
-SDValue PIC16TargetLowering:: LowerFORMAL_ARGUMENTS(SDValue Op,
- SelectionDAG &DAG) {
+SDValue PIC16TargetLowering::LowerFORMAL_ARGUMENTS(SDValue Op,
+ SelectionDAG &DAG) {
SmallVector<SDValue, 8> ArgValues;
- unsigned NumArgs = Op.getNumOperands() - 3;
+ unsigned NumArgVals = Op.getNode()->getNumValues() - 1;
+ DebugLoc dl = Op.getDebugLoc();
+ SDValue Chain = Op.getOperand(0); // Formal arguments' chain
+
+
+ // Get the callee's name to create the <fname>.args label to pass args.
+ MachineFunction &MF = DAG.getMachineFunction();
+ const Function *F = MF.getFunction();
+ std::string FuncName = F->getName();
+
+ // Reset the map of FI and TmpOffset
+ ResetTmpOffsetMap();
+ // Initialize the ReserveFrameCount
+ InitReservedFrameCount(F);
- // Creating UNDEF nodes to meet the requirement of MERGE_VALUES node.
- for(unsigned i = 0 ; i<NumArgs ; i++) {
- SDValue TempNode = DAG.getNode(ISD::UNDEF, Op.getNode()->getValueType(i));
- ArgValues.push_back(TempNode);
+ // Create the <fname>.args external symbol.
+ const char *tmpName = createESName(PAN::getArgsLabel(FuncName));
+ SDValue ES = DAG.getTargetExternalSymbol(tmpName, MVT::i8);
+
+ // Load arg values from the label + offset.
+ 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);
}
+ // Return a MERGE_VALUE node.
ArgValues.push_back(Op.getOperand(0));
- return DAG.getNode(ISD::MERGE_VALUES, Op.getNode()->getVTList(),
- &ArgValues[0],
- ArgValues.size()).getValue(Op.getResNo());
+ return DAG.getNode(ISD::MERGE_VALUES, dl, Op.getNode()->getVTList(),
+ &ArgValues[0], ArgValues.size()).getValue(Op.getResNo());
}
-// Perform DAGCombine of PIC16Load
+// Perform DAGCombine of PIC16Load.
+// FIXME - Need a more elaborate comment here.
SDValue PIC16TargetLowering::
PerformPIC16LoadCombine(SDNode *N, DAGCombinerInfo &DCI) const {
SelectionDAG &DAG = DCI.DAG;
return SDValue();
}
+// For all the functions with arguments some STORE nodes are generated
+// that store the argument on the frameindex. However in PIC16 the arguments
+// are passed on stack only. Therefore these STORE nodes are redundant.
+// To remove these STORE nodes will be removed in PerformStoreCombine
+//
+// Currently this function is doint nothing and will be updated for removing
+// unwanted store operations
+SDValue PIC16TargetLowering::
+PerformStoreCombine(SDNode *N, DAGCombinerInfo &DCI) const {
+ return SDValue(N, 0);
+ /*
+ // Storing an undef value is of no use, so remove it
+ if (isStoringUndef(N, Chain, DAG)) {
+ return Chain; // remove the store and return the chain
+ }
+ //else everything is ok.
+ return SDValue(N, 0);
+ */
+}
SDValue PIC16TargetLowering::PerformDAGCombine(SDNode *N,
DAGCombinerInfo &DCI) const {
switch (N->getOpcode()) {
- case PIC16ISD::PIC16Load:
+ case ISD::STORE:
+ return PerformStoreCombine(N, DCI);
+ case PIC16ISD::PIC16Load:
return PerformPIC16LoadCombine(N, DCI);
}
return SDValue();
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::SETULE: return PIC16CC::ULE;
+ case ISD::SETUGE: return PIC16CC::UGE;
case ISD::SETUGT: return PIC16CC::UGT;
}
}
MachineBasicBlock *
PIC16TargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
- MachineBasicBlock *BB) {
+ MachineBasicBlock *BB) const {
const TargetInstrInfo &TII = *getTargetMachine().getInstrInfo();
unsigned CC = (PIC16CC::CondCodes)MI->getOperand(3).getImm();
+ DebugLoc dl = MI->getDebugLoc();
// To "insert" a SELECT_CC instruction, we actually have to insert the diamond
// control-flow pattern. The incoming instruction knows the destination vreg
MachineFunction *F = BB->getParent();
MachineBasicBlock *copy0MBB = F->CreateMachineBasicBlock(LLVM_BB);
MachineBasicBlock *sinkMBB = F->CreateMachineBasicBlock(LLVM_BB);
- BuildMI(BB, TII.get(PIC16::pic16brcond)).addMBB(sinkMBB).addImm(CC);
+ BuildMI(BB, dl, TII.get(PIC16::pic16brcond)).addMBB(sinkMBB).addImm(CC);
F->insert(It, copy0MBB);
F->insert(It, sinkMBB);
// %Result = phi [ %FalseValue, copy0MBB ], [ %TrueValue, thisMBB ]
// ...
BB = sinkMBB;
- BuildMI(BB, TII.get(PIC16::PHI), MI->getOperand(0).getReg())
+ 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);
Cmp.getValue(1));
}
-
projects / oota-llvm.git / blobdiff