#include "PIC16Subtarget.h"
#include "llvm/CodeGen/SelectionDAG.h"
#include "llvm/Target/TargetLowering.h"
+#include <map>
namespace llvm {
namespace PIC16ISD {
Lo, // Low 8-bits of GlobalAddress.
Hi, // High 8-bits of GlobalAddress.
PIC16Load,
+ PIC16LdArg, // This is replica of PIC16Load but used to load function
+ // arguments and is being used for facilitating for some
+ // store removal optimizations.
+
PIC16LdWF,
PIC16Store,
PIC16StWF,
Banksel,
- MTLO,
- MTHI,
+ MTLO, // Move to low part of FSR
+ MTHI, // Move to high part of FSR
+ MTPCLATH, // Move to PCLATCH
+ PIC16Connect, // General connector for PIC16 nodes
BCF,
LSLF, // PIC16 Logical shift left
LRLF, // PIC16 Logical shift right
RLF, // Rotate left through carry
RRF, // Rotate right through carry
CALL, // PIC16 Call instruction
- SUBCC, // Compare for equality or inequality.
+ CALLW, // PIC16 CALLW instruction
+ SUBCC, // Compare for equality or inequality.
SELECT_ICC, // Psuedo to be caught in schedular and expanded to brcond.
BRCOND, // Conditional branch.
+ RET, // Return.
Dummy
};
ROM_SPACE = 1 // ROM address space number is 1
};
enum PIC16Libcall {
- MUL_I8,
+ MUL_I8 = RTLIB::UNKNOWN_LIBCALL + 1,
SRA_I8,
SLL_I8,
SRL_I8,
/// DAG node.
virtual const char *getTargetNodeName(unsigned Opcode) const;
/// getSetCCResultType - Return the ISD::SETCC ValueType
- virtual MVT getSetCCResultType(MVT ValType) const;
- SDValue LowerFORMAL_ARGUMENTS(SDValue Op, SelectionDAG &DAG);
+ virtual MVT::SimpleValueType getSetCCResultType(EVT ValType) const;
SDValue LowerShift(SDValue Op, SelectionDAG &DAG);
+ SDValue LowerMUL(SDValue Op, SelectionDAG &DAG);
SDValue LowerADD(SDValue Op, SelectionDAG &DAG);
SDValue LowerSUB(SDValue Op, SelectionDAG &DAG);
SDValue LowerBinOp(SDValue Op, SelectionDAG &DAG);
- SDValue LowerCALL(SDValue Op, SelectionDAG &DAG);
- SDValue LowerRET(SDValue Op, SelectionDAG &DAG);
- SDValue LowerCallReturn(SDValue Op, SDValue Chain, SDValue FrameAddress,
- SDValue InFlag, SelectionDAG &DAG);
- SDValue LowerCallArguments(SDValue Op, SDValue Chain, SDValue FrameAddress,
- SDValue InFlag, SelectionDAG &DAG);
+ // Call returns
+ SDValue
+ LowerDirectCallReturn(SDValue RetLabel, SDValue Chain, SDValue InFlag,
+ const SmallVectorImpl<ISD::InputArg> &Ins,
+ DebugLoc dl, SelectionDAG &DAG,
+ SmallVectorImpl<SDValue> &InVals);
+ SDValue
+ LowerIndirectCallReturn(SDValue Chain, SDValue InFlag,
+ SDValue DataAddr_Lo, SDValue DataAddr_Hi,
+ const SmallVectorImpl<ISD::InputArg> &Ins,
+ DebugLoc dl, SelectionDAG &DAG,
+ SmallVectorImpl<SDValue> &InVals);
+
+ // Call arguments
+ SDValue
+ LowerDirectCallArguments(SDValue ArgLabel, SDValue Chain, SDValue InFlag,
+ const SmallVectorImpl<ISD::OutputArg> &Outs,
+ DebugLoc dl, SelectionDAG &DAG);
+
+ SDValue
+ LowerIndirectCallArguments(SDValue Chain, SDValue InFlag,
+ SDValue DataAddr_Lo, SDValue DataAddr_Hi,
+ const SmallVectorImpl<ISD::OutputArg> &Outs,
+ const SmallVectorImpl<ISD::InputArg> &Ins,
+ DebugLoc dl, SelectionDAG &DAG);
+
SDValue LowerBR_CC(SDValue Op, SelectionDAG &DAG);
SDValue LowerSELECT_CC(SDValue Op, SelectionDAG &DAG);
SDValue getPIC16Cmp(SDValue LHS, SDValue RHS, unsigned OrigCC, SDValue &CC,
- SelectionDAG &DAG);
+ SelectionDAG &DAG, DebugLoc dl);
virtual MachineBasicBlock *EmitInstrWithCustomInserter(MachineInstr *MI,
- MachineBasicBlock *MBB);
+ MachineBasicBlock *MBB) const;
virtual SDValue LowerOperation(SDValue Op, SelectionDAG &DAG);
SmallVectorImpl<SDValue> &Results,
SelectionDAG &DAG);
+ virtual SDValue
+ LowerFormalArguments(SDValue Chain,
+ unsigned CallConv,
+ bool isVarArg,
+ const SmallVectorImpl<ISD::InputArg> &Ins,
+ DebugLoc dl, SelectionDAG &DAG,
+ SmallVectorImpl<SDValue> &InVals);
+
+ virtual SDValue
+ LowerCall(SDValue Chain, SDValue Callee,
+ unsigned CallConv, bool isVarArg, bool isTailCall,
+ const SmallVectorImpl<ISD::OutputArg> &Outs,
+ const SmallVectorImpl<ISD::InputArg> &Ins,
+ DebugLoc dl, SelectionDAG &DAG,
+ SmallVectorImpl<SDValue> &InVals);
+
+ virtual SDValue
+ LowerReturn(SDValue Chain,
+ unsigned CallConv, bool isVarArg,
+ const SmallVectorImpl<ISD::OutputArg> &Outs,
+ DebugLoc dl, SelectionDAG &DAG);
+
SDValue ExpandStore(SDNode *N, SelectionDAG &DAG);
SDValue ExpandLoad(SDNode *N, SelectionDAG &DAG);
- //SDValue ExpandAdd(SDNode *N, SelectionDAG &DAG);
SDValue ExpandGlobalAddress(SDNode *N, SelectionDAG &DAG);
SDValue ExpandExternalSymbol(SDNode *N, SelectionDAG &DAG);
SDValue ExpandFrameIndex(SDNode *N, SelectionDAG &DAG);
SDValue PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const;
SDValue PerformPIC16LoadCombine(SDNode *N, DAGCombinerInfo &DCI) const;
-
+ SDValue PerformStoreCombine(SDNode *N, DAGCombinerInfo &DCI) const;
+
+ // This function returns the Tmp Offset for FrameIndex. If any TmpOffset
+ // already exists for the FI then it returns the same else it creates the
+ // new offset and returns.
+ unsigned GetTmpOffsetForFI(unsigned FI, unsigned slot_size);
+ void ResetTmpOffsetMap() { FiTmpOffsetMap.clear(); SetTmpSize(0); }
+ void InitReservedFrameCount(const Function *F);
+
+ // Return the size of Tmp variable
+ unsigned GetTmpSize() { return TmpSize; }
+ void SetTmpSize(unsigned Size) { TmpSize = Size; }
+
+ /// getFunctionAlignment - Return the Log2 alignment of this function.
+ virtual unsigned getFunctionAlignment(const Function *) const {
+ // FIXME: The function never seems to be aligned.
+ return 1;
+ }
private:
- // If the Node is a BUILD_PAIR representing representing an Address
- // then this function will return true
+ // If the Node is a BUILD_PAIR representing a direct Address,
+ // then this function will return true.
bool isDirectAddress(const SDValue &Op);
// If the Node is a DirectAddress in ROM_SPACE then this
// function will return true
bool isRomAddress(const SDValue &Op);
- // 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 getChain(SDValue &Op);
-
- SDValue getOutFlag(SDValue &Op);
-
-
// Extract the Lo and Hi component of Op.
void GetExpandedParts(SDValue Op, SelectionDAG &DAG, SDValue &Lo,
SDValue &Hi);
// addresses need Banksel and Indirect addresses need to be loaded to
// FSR first. Handle address specific cases here.
void LegalizeAddress(SDValue Ptr, SelectionDAG &DAG, SDValue &Chain,
- SDValue &NewPtr, unsigned &Offset);
+ SDValue &NewPtr, unsigned &Offset, DebugLoc dl);
// FrameIndex should be broken down into ExternalSymbol and FrameOffset.
void LegalizeFrameIndex(SDValue Op, SelectionDAG &DAG, SDValue &ES,
int &Offset);
+ // For indirect calls data address of the callee frame need to be
+ // extracted. This function fills the arguments DataAddr_Lo and
+ // DataAddr_Hi with the address of the callee frame.
+ void GetDataAddress(DebugLoc dl, SDValue Callee, SDValue &Chain,
+ SDValue &DataAddr_Lo, SDValue &DataAddr_Hi,
+ SelectionDAG &DAG);
+
// We can not have both operands of a binary operation in W.
// This function is used to put one operand on stack and generate a load.
- SDValue ConvertToMemOperand(SDValue Op, SelectionDAG &DAG);
+ SDValue ConvertToMemOperand(SDValue Op, SelectionDAG &DAG, DebugLoc dl);
// This function checks if we need to put an operand of an operation on
// stack and generate a load or not.
// Extending the LIB Call framework of LLVM
- // To hold the names of PIC16Libcalls
+ // to hold the names of PIC16Libcalls.
const char *PIC16LibcallNames[PIC16ISD::PIC16UnknownCall];
- // To set and retrieve the lib call names
+ // To set and retrieve the lib call names.
void setPIC16LibcallName(PIC16ISD::PIC16Libcall Call, const char *Name);
const char *getPIC16LibcallName(PIC16ISD::PIC16Libcall Call);
- // Make PIC16 Libcall
- SDValue MakePIC16Libcall(PIC16ISD::PIC16Libcall Call, MVT RetVT,
+ // Make PIC16 Libcall.
+ SDValue MakePIC16Libcall(PIC16ISD::PIC16Libcall Call, EVT RetVT,
const SDValue *Ops, unsigned NumOps, bool isSigned,
SelectionDAG &DAG, DebugLoc dl);
// Check if operation has a direct load operand.
inline bool isDirectLoad(const SDValue Op);
- // Create the symbol and index for function frame
- void getCurrentFrameIndex(SelectionDAG &DAG, SDValue &ES,
- unsigned SlotSize, int &FI);
-
- SDValue getCurrentFrame(SelectionDAG &DAG);
+ private:
+ // The frameindexes generated for spill/reload are stack based.
+ // This maps maintain zero based indexes for these FIs.
+ std::map<unsigned, unsigned> FiTmpOffsetMap;
+ unsigned TmpSize;
+
+ // These are the frames for return value and argument passing
+ // These FrameIndices will be expanded to foo.frame external symbol
+ // and all others will be expanded to foo.tmp external symbol.
+ unsigned ReservedFrameCount;
};
} // namespace llvm
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