1 //===- MipsMachineFunctionInfo.h - Private data used for Mips ---*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // This file declares the Mips specific subclass of MachineFunctionInfo. 10 // 11 //===----------------------------------------------------------------------===// 12 13 #ifndef LLVM_LIB_TARGET_MIPS_MIPSMACHINEFUNCTION_H 14 #define LLVM_LIB_TARGET_MIPS_MIPSMACHINEFUNCTION_H 15 16 #include "Mips16HardFloatInfo.h" 17 #include "llvm/CodeGen/MachineFunction.h" 18 #include "llvm/CodeGen/MachineMemOperand.h" 19 #include <map> 20 21 namespace llvm { 22 23 /// MipsFunctionInfo - This class is derived from MachineFunction private 24 /// Mips target-specific information for each MachineFunction. 25 class MipsFunctionInfo : public MachineFunctionInfo { 26 public: MipsFunctionInfo(MachineFunction & MF)27 MipsFunctionInfo(MachineFunction &MF) : MF(MF) {} 28 29 ~MipsFunctionInfo() override; 30 getSRetReturnReg()31 unsigned getSRetReturnReg() const { return SRetReturnReg; } setSRetReturnReg(unsigned Reg)32 void setSRetReturnReg(unsigned Reg) { SRetReturnReg = Reg; } 33 34 bool globalBaseRegSet() const; 35 Register getGlobalBaseReg(); 36 Register getGlobalBaseRegForGlobalISel(); 37 38 // Insert instructions to initialize the global base register in the 39 // first MBB of the function. 40 void initGlobalBaseReg(); 41 getVarArgsFrameIndex()42 int getVarArgsFrameIndex() const { return VarArgsFrameIndex; } setVarArgsFrameIndex(int Index)43 void setVarArgsFrameIndex(int Index) { VarArgsFrameIndex = Index; } 44 hasByvalArg()45 bool hasByvalArg() const { return HasByvalArg; } setFormalArgInfo(unsigned Size,bool HasByval)46 void setFormalArgInfo(unsigned Size, bool HasByval) { 47 IncomingArgSize = Size; 48 HasByvalArg = HasByval; 49 } 50 getIncomingArgSize()51 unsigned getIncomingArgSize() const { return IncomingArgSize; } 52 callsEhReturn()53 bool callsEhReturn() const { return CallsEhReturn; } setCallsEhReturn()54 void setCallsEhReturn() { CallsEhReturn = true; } 55 56 void createEhDataRegsFI(); getEhDataRegFI(unsigned Reg)57 int getEhDataRegFI(unsigned Reg) const { return EhDataRegFI[Reg]; } 58 bool isEhDataRegFI(int FI) const; 59 60 /// Create a MachinePointerInfo that has an ExternalSymbolPseudoSourceValue 61 /// object representing a GOT entry for an external function. 62 MachinePointerInfo callPtrInfo(const char *ES); 63 64 // Functions with the "interrupt" attribute require special prologues, 65 // epilogues and additional spill slots. isISR()66 bool isISR() const { return IsISR; } setISR()67 void setISR() { IsISR = true; } 68 void createISRRegFI(); getISRRegFI(unsigned Reg)69 int getISRRegFI(unsigned Reg) const { return ISRDataRegFI[Reg]; } 70 bool isISRRegFI(int FI) const; 71 72 /// Create a MachinePointerInfo that has a GlobalValuePseudoSourceValue object 73 /// representing a GOT entry for a global function. 74 MachinePointerInfo callPtrInfo(const GlobalValue *GV); 75 setSaveS2()76 void setSaveS2() { SaveS2 = true; } hasSaveS2()77 bool hasSaveS2() const { return SaveS2; } 78 79 int getMoveF64ViaSpillFI(const TargetRegisterClass *RC); 80 81 std::map<const char *, const Mips16HardFloatInfo::FuncSignature *> 82 StubsNeeded; 83 84 private: 85 virtual void anchor(); 86 87 MachineFunction& MF; 88 89 /// SRetReturnReg - Some subtargets require that sret lowering includes 90 /// returning the value of the returned struct in a register. This field 91 /// holds the virtual register into which the sret argument is passed. 92 unsigned SRetReturnReg = 0; 93 94 /// GlobalBaseReg - keeps track of the virtual register initialized for 95 /// use as the global base register. This is used for PIC in some PIC 96 /// relocation models. 97 unsigned GlobalBaseReg = 0; 98 99 /// VarArgsFrameIndex - FrameIndex for start of varargs area. 100 int VarArgsFrameIndex = 0; 101 102 /// True if function has a byval argument. 103 bool HasByvalArg; 104 105 /// Size of incoming argument area. 106 unsigned IncomingArgSize; 107 108 /// CallsEhReturn - Whether the function calls llvm.eh.return. 109 bool CallsEhReturn = false; 110 111 /// Frame objects for spilling eh data registers. 112 int EhDataRegFI[4]; 113 114 /// ISR - Whether the function is an Interrupt Service Routine. 115 bool IsISR = false; 116 117 /// Frame objects for spilling C0_STATUS, C0_EPC 118 int ISRDataRegFI[2]; 119 120 // saveS2 121 bool SaveS2 = false; 122 123 /// FrameIndex for expanding BuildPairF64 nodes to spill and reload when the 124 /// O32 FPXX ABI is enabled. -1 is used to denote invalid index. 125 int MoveF64ViaSpillFI = -1; 126 }; 127 128 } // end namespace llvm 129 130 #endif // LLVM_LIB_TARGET_MIPS_MIPSMACHINEFUNCTION_H 131