X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FTarget%2FMips%2FMipsMachineFunction.h;h=43bf6827eefb3a8f6b7246e9d3c1577d0415257d;hb=45ecbfc8e58923131068dced0cf89348ac61208f;hp=325619313dee451f5c2346583ee97be2c8196c1e;hpb=6e35e4c8c1d99318c11e5b30d4530e6b199ccfab;p=oota-llvm.git diff --git a/lib/Target/Mips/MipsMachineFunction.h b/lib/Target/Mips/MipsMachineFunction.h index 325619313de..43bf6827eef 100644 --- a/lib/Target/Mips/MipsMachineFunction.h +++ b/lib/Target/Mips/MipsMachineFunction.h @@ -14,63 +14,88 @@ #ifndef MIPS_MACHINE_FUNCTION_INFO_H #define MIPS_MACHINE_FUNCTION_INFO_H -#include -#include "llvm/ADT/SmallVector.h" -#include "llvm/ADT/VectorExtras.h" -#include "llvm/CodeGen/MachineFunction.h" +#include "MipsSubtarget.h" +#include "llvm/ADT/StringMap.h" +#include "llvm/ADT/ValueMap.h" #include "llvm/CodeGen/MachineFrameInfo.h" +#include "llvm/CodeGen/MachineFunction.h" +#include "llvm/CodeGen/MachineMemOperand.h" +#include "llvm/CodeGen/PseudoSourceValue.h" +#include "llvm/IR/GlobalValue.h" +#include "llvm/Target/TargetFrameLowering.h" +#include "llvm/Target/TargetMachine.h" +#include namespace llvm { +/// \brief A class derived from PseudoSourceValue that represents a GOT entry +/// resolved by lazy-binding. +class MipsCallEntry : public PseudoSourceValue { +public: + explicit MipsCallEntry(const StringRef &N); + explicit MipsCallEntry(const GlobalValue *V); + virtual bool isConstant(const MachineFrameInfo *) const; + virtual bool isAliased(const MachineFrameInfo *) const; + virtual bool mayAlias(const MachineFrameInfo *) const; + +private: + virtual void printCustom(raw_ostream &O) const; +#ifndef NDEBUG + std::string Name; + const GlobalValue *Val; +#endif +}; + /// MipsFunctionInfo - This class is derived from MachineFunction private /// Mips target-specific information for each MachineFunction. class MipsFunctionInfo : public MachineFunctionInfo { +public: + MipsFunctionInfo(MachineFunction& MF) + : MF(MF), SRetReturnReg(0), GlobalBaseReg(0), Mips16SPAliasReg(0), + VarArgsFrameIndex(0), CallsEhReturn(false) + {} + + ~MipsFunctionInfo(); + + unsigned getSRetReturnReg() const { return SRetReturnReg; } + void setSRetReturnReg(unsigned Reg) { SRetReturnReg = Reg; } + + bool globalBaseRegSet() const; + unsigned getGlobalBaseReg(); + + bool mips16SPAliasRegSet() const; + unsigned getMips16SPAliasReg(); + + int getVarArgsFrameIndex() const { return VarArgsFrameIndex; } + void setVarArgsFrameIndex(int Index) { VarArgsFrameIndex = Index; } + + bool hasByvalArg() const { return HasByvalArg; } + void setFormalArgInfo(unsigned Size, bool HasByval) { + IncomingArgSize = Size; + HasByvalArg = HasByval; + } + + unsigned getIncomingArgSize() const { return IncomingArgSize; } + + bool callsEhReturn() const { return CallsEhReturn; } + void setCallsEhReturn() { CallsEhReturn = true; } + + void createEhDataRegsFI(); + int getEhDataRegFI(unsigned Reg) const { return EhDataRegFI[Reg]; } + bool isEhDataRegFI(int FI) const; + + /// \brief Create a MachinePointerInfo that has a MipsCallEntr object + /// representing a GOT entry for an external function. + MachinePointerInfo callPtrInfo(const StringRef &Name); + + /// \brief Create a MachinePointerInfo that has a MipsCallEntr object + /// representing a GOT entry for a global function. + MachinePointerInfo callPtrInfo(const GlobalValue *Val); private: - /// Holds for each function where on the stack the Frame Pointer must be - /// saved. This is used on Prologue and Epilogue to emit FP save/restore - int FPStackOffset; - - /// Holds for each function where on the stack the Return Address must be - /// saved. This is used on Prologue and Epilogue to emit RA save/restore - int RAStackOffset; - - /// At each function entry, two special bitmask directives must be emitted - /// to help debugging, for CPU and FPU callee saved registers. Both need - /// the negative offset from the final stack size and its higher registers - /// location on the stack. - int CPUTopSavedRegOff; - int FPUTopSavedRegOff; - - /// MipsFIHolder - Holds a FrameIndex and it's Stack Pointer Offset - struct MipsFIHolder { - - int FI; - int SPOffset; - - MipsFIHolder(int FrameIndex, int StackPointerOffset) - : FI(FrameIndex), SPOffset(StackPointerOffset) {} - }; - - /// When PIC is used the GP must be saved on the stack on the function - /// prologue and must be reloaded from this stack location after every - /// call. A reference to its stack location and frame index must be kept - /// to be used on emitPrologue and processFunctionBeforeFrameFinalized. - MipsFIHolder GPHolder; - - /// On LowerFormalArguments the stack size is unknown, so the Stack - /// Pointer Offset calculation of "not in register arguments" must be - /// postponed to emitPrologue. - SmallVector FnLoadArgs; - bool HasLoadArgs; - - // When VarArgs, we must write registers back to caller stack, preserving - // on register arguments. Since the stack size is unknown on - // LowerFormalArguments, the Stack Pointer Offset calculation must be - // postponed to emitPrologue. - SmallVector FnStoreVarArgs; - bool HasStoreVarArgs; + virtual void anchor(); + MachineFunction& MF; /// SRetReturnReg - Some subtargets require that sret lowering includes /// returning the value of the returned struct in a register. This field /// holds the virtual register into which the sret argument is passed. @@ -81,94 +106,29 @@ private: /// relocation models. unsigned GlobalBaseReg; + /// Mips16SPAliasReg - keeps track of the virtual register initialized for + /// use as an alias for SP for use in load/store of halfword/byte from/to + /// the stack + unsigned Mips16SPAliasReg; + /// VarArgsFrameIndex - FrameIndex for start of varargs area. int VarArgsFrameIndex; - // Range of frame object indices. - // InArgFIRange: Range of indices of all frame objects created during call to - // LowerFormalArguments. - // OutArgFIRange: Range of indices of all frame objects created during call to - // LowerCall except for the frame object for restoring $gp. - std::pair InArgFIRange, OutArgFIRange; - int GPFI; // Index of the frame object for restoring $gp - bool HasCall; // True if function has a function call. -public: - MipsFunctionInfo(MachineFunction& MF) - : FPStackOffset(0), RAStackOffset(0), CPUTopSavedRegOff(0), - FPUTopSavedRegOff(0), GPHolder(-1,-1), HasLoadArgs(false), - HasStoreVarArgs(false), SRetReturnReg(0), GlobalBaseReg(0), - VarArgsFrameIndex(0), InArgFIRange(std::make_pair(-1, 0)), - OutArgFIRange(std::make_pair(-1, 0)), GPFI(0), HasCall(false) - {} - - int getFPStackOffset() const { return FPStackOffset; } - void setFPStackOffset(int Off) { FPStackOffset = Off; } - - int getRAStackOffset() const { return RAStackOffset; } - void setRAStackOffset(int Off) { RAStackOffset = Off; } - - int getCPUTopSavedRegOff() const { return CPUTopSavedRegOff; } - void setCPUTopSavedRegOff(int Off) { CPUTopSavedRegOff = Off; } - - int getFPUTopSavedRegOff() const { return FPUTopSavedRegOff; } - void setFPUTopSavedRegOff(int Off) { FPUTopSavedRegOff = Off; } - - bool isInArgFI(int FI) const { - return FI <= InArgFIRange.first && FI >= InArgFIRange.second; - } - void setLastInArgFI(int FI) { InArgFIRange.second = FI; } - - bool isOutArgFI(int FI) const { - return FI <= OutArgFIRange.first && FI >= OutArgFIRange.second; - } - void extendOutArgFIRange(int FirstFI, int LastFI) { - if (!OutArgFIRange.second) - // this must be the first time this function was called. - OutArgFIRange.first = FirstFI; - OutArgFIRange.second = LastFI; - } - - int getGPStackOffset() const { return GPHolder.SPOffset; } - int getGPFI() const { return GPHolder.FI; } - void setGPStackOffset(int Off) { GPHolder.SPOffset = Off; } - void setGPFI(int FI) { GPHolder.FI = FI; } - bool needGPSaveRestore() const { return GPHolder.SPOffset != -1; } - bool isGPFI(int FI) const { return GPFI && GPFI == FI; } + /// True if function has a byval argument. + bool HasByvalArg; - bool hasLoadArgs() const { return HasLoadArgs; } - bool hasStoreVarArgs() const { return HasStoreVarArgs; } + /// Size of incoming argument area. + unsigned IncomingArgSize; - void recordLoadArgsFI(int FI, int SPOffset) { - if (!HasLoadArgs) HasLoadArgs=true; - FnLoadArgs.push_back(MipsFIHolder(FI, SPOffset)); - } - void recordStoreVarArgsFI(int FI, int SPOffset) { - if (!HasStoreVarArgs) HasStoreVarArgs=true; - FnStoreVarArgs.push_back(MipsFIHolder(FI, SPOffset)); - } - - void adjustLoadArgsFI(MachineFrameInfo *MFI) const { - if (!hasLoadArgs()) return; - for (unsigned i = 0, e = FnLoadArgs.size(); i != e; ++i) - MFI->setObjectOffset( FnLoadArgs[i].FI, FnLoadArgs[i].SPOffset ); - } - void adjustStoreVarArgsFI(MachineFrameInfo *MFI) const { - if (!hasStoreVarArgs()) return; - for (unsigned i = 0, e = FnStoreVarArgs.size(); i != e; ++i) - MFI->setObjectOffset( FnStoreVarArgs[i].FI, FnStoreVarArgs[i].SPOffset ); - } + /// CallsEhReturn - Whether the function calls llvm.eh.return. + bool CallsEhReturn; - unsigned getSRetReturnReg() const { return SRetReturnReg; } - void setSRetReturnReg(unsigned Reg) { SRetReturnReg = Reg; } - - unsigned getGlobalBaseReg() const { return GlobalBaseReg; } - void setGlobalBaseReg(unsigned Reg) { GlobalBaseReg = Reg; } - - int getVarArgsFrameIndex() const { return VarArgsFrameIndex; } - void setVarArgsFrameIndex(int Index) { VarArgsFrameIndex = Index; } + /// Frame objects for spilling eh data registers. + int EhDataRegFI[4]; - bool hasCall() const { return HasCall; } - void setHasCall() { HasCall = true; } + /// MipsCallEntry maps. + StringMap ExternalCallEntries; + ValueMap GlobalCallEntries; }; } // end of namespace llvm