1 //===- MipsMachineFunctionInfo.h - Private data used for Mips ---*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file declares the Mips specific subclass of MachineFunctionInfo. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #ifndef LLVM_LIB_TARGET_MIPS_MIPSMACHINEFUNCTION_H 15 #define LLVM_LIB_TARGET_MIPS_MIPSMACHINEFUNCTION_H 16 17 #include "Mips16HardFloatInfo.h" 18 #include "llvm/CodeGen/MachineFunction.h" 19 #include "llvm/CodeGen/MachineMemOperand.h" 20 #include <map> 21 22 namespace llvm { 23 24 /// MipsFunctionInfo - This class is derived from MachineFunction private 25 /// Mips target-specific information for each MachineFunction. 26 class MipsFunctionInfo : public MachineFunctionInfo { 27 public: MipsFunctionInfo(MachineFunction & MF)28 MipsFunctionInfo(MachineFunction &MF) : MF(MF) {} 29 30 ~MipsFunctionInfo() override; 31 getSRetReturnReg()32 unsigned getSRetReturnReg() const { return SRetReturnReg; } setSRetReturnReg(unsigned Reg)33 void setSRetReturnReg(unsigned Reg) { SRetReturnReg = Reg; } 34 35 bool globalBaseRegSet() const; 36 unsigned getGlobalBaseReg(); 37 getVarArgsFrameIndex()38 int getVarArgsFrameIndex() const { return VarArgsFrameIndex; } setVarArgsFrameIndex(int Index)39 void setVarArgsFrameIndex(int Index) { VarArgsFrameIndex = Index; } 40 hasByvalArg()41 bool hasByvalArg() const { return HasByvalArg; } setFormalArgInfo(unsigned Size,bool HasByval)42 void setFormalArgInfo(unsigned Size, bool HasByval) { 43 IncomingArgSize = Size; 44 HasByvalArg = HasByval; 45 } 46 getIncomingArgSize()47 unsigned getIncomingArgSize() const { return IncomingArgSize; } 48 callsEhReturn()49 bool callsEhReturn() const { return CallsEhReturn; } setCallsEhReturn()50 void setCallsEhReturn() { CallsEhReturn = true; } 51 52 void createEhDataRegsFI(); getEhDataRegFI(unsigned Reg)53 int getEhDataRegFI(unsigned Reg) const { return EhDataRegFI[Reg]; } 54 bool isEhDataRegFI(int FI) const; 55 56 /// Create a MachinePointerInfo that has an ExternalSymbolPseudoSourceValue 57 /// object representing a GOT entry for an external function. 58 MachinePointerInfo callPtrInfo(const char *ES); 59 60 // Functions with the "interrupt" attribute require special prologues, 61 // epilogues and additional spill slots. isISR()62 bool isISR() const { return IsISR; } setISR()63 void setISR() { IsISR = true; } 64 void createISRRegFI(); getISRRegFI(unsigned Reg)65 int getISRRegFI(unsigned Reg) const { return ISRDataRegFI[Reg]; } 66 bool isISRRegFI(int FI) const; 67 68 /// Create a MachinePointerInfo that has a GlobalValuePseudoSourceValue object 69 /// representing a GOT entry for a global function. 70 MachinePointerInfo callPtrInfo(const GlobalValue *GV); 71 setSaveS2()72 void setSaveS2() { SaveS2 = true; } hasSaveS2()73 bool hasSaveS2() const { return SaveS2; } 74 75 int getMoveF64ViaSpillFI(const TargetRegisterClass *RC); 76 77 std::map<const char *, const Mips16HardFloatInfo::FuncSignature *> 78 StubsNeeded; 79 80 private: 81 virtual void anchor(); 82 83 MachineFunction& MF; 84 85 /// SRetReturnReg - Some subtargets require that sret lowering includes 86 /// returning the value of the returned struct in a register. This field 87 /// holds the virtual register into which the sret argument is passed. 88 unsigned SRetReturnReg = 0; 89 90 /// GlobalBaseReg - keeps track of the virtual register initialized for 91 /// use as the global base register. This is used for PIC in some PIC 92 /// relocation models. 93 unsigned GlobalBaseReg = 0; 94 95 /// VarArgsFrameIndex - FrameIndex for start of varargs area. 96 int VarArgsFrameIndex = 0; 97 98 /// True if function has a byval argument. 99 bool HasByvalArg; 100 101 /// Size of incoming argument area. 102 unsigned IncomingArgSize; 103 104 /// CallsEhReturn - Whether the function calls llvm.eh.return. 105 bool CallsEhReturn = false; 106 107 /// Frame objects for spilling eh data registers. 108 int EhDataRegFI[4]; 109 110 /// ISR - Whether the function is an Interrupt Service Routine. 111 bool IsISR = false; 112 113 /// Frame objects for spilling C0_STATUS, C0_EPC 114 int ISRDataRegFI[2]; 115 116 // saveS2 117 bool SaveS2 = false; 118 119 /// FrameIndex for expanding BuildPairF64 nodes to spill and reload when the 120 /// O32 FPXX ABI is enabled. -1 is used to denote invalid index. 121 int MoveF64ViaSpillFI = -1; 122 }; 123 124 } // end namespace llvm 125 126 #endif // LLVM_LIB_TARGET_MIPS_MIPSMACHINEFUNCTION_H 127