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(const Function & F,const TargetSubtargetInfo * STI)27 MipsFunctionInfo(const Function &F, const TargetSubtargetInfo *STI) {} 28 29 MachineFunctionInfo * 30 clone(BumpPtrAllocator &Allocator, MachineFunction &DestMF, 31 const DenseMap<MachineBasicBlock *, MachineBasicBlock *> &Src2DstMBB) 32 const override; 33 34 ~MipsFunctionInfo() override; 35 getSRetReturnReg()36 unsigned getSRetReturnReg() const { return SRetReturnReg; } setSRetReturnReg(unsigned Reg)37 void setSRetReturnReg(unsigned Reg) { SRetReturnReg = Reg; } 38 39 bool globalBaseRegSet() const; 40 Register getGlobalBaseReg(MachineFunction &MF); 41 Register getGlobalBaseRegForGlobalISel(MachineFunction &MF); 42 43 // Insert instructions to initialize the global base register in the 44 // first MBB of the function. 45 void initGlobalBaseReg(MachineFunction &MF); 46 getVarArgsFrameIndex()47 int getVarArgsFrameIndex() const { return VarArgsFrameIndex; } setVarArgsFrameIndex(int Index)48 void setVarArgsFrameIndex(int Index) { VarArgsFrameIndex = Index; } 49 hasByvalArg()50 bool hasByvalArg() const { return HasByvalArg; } setFormalArgInfo(unsigned Size,bool HasByval)51 void setFormalArgInfo(unsigned Size, bool HasByval) { 52 IncomingArgSize = Size; 53 HasByvalArg = HasByval; 54 } 55 getIncomingArgSize()56 unsigned getIncomingArgSize() const { return IncomingArgSize; } 57 callsEhReturn()58 bool callsEhReturn() const { return CallsEhReturn; } setCallsEhReturn()59 void setCallsEhReturn() { CallsEhReturn = true; } 60 61 void createEhDataRegsFI(MachineFunction &MF); getEhDataRegFI(unsigned Reg)62 int getEhDataRegFI(unsigned Reg) const { return EhDataRegFI[Reg]; } 63 bool isEhDataRegFI(int FI) const; 64 65 /// Create a MachinePointerInfo that has an ExternalSymbolPseudoSourceValue 66 /// object representing a GOT entry for an external function. 67 MachinePointerInfo callPtrInfo(MachineFunction &MF, const char *ES); 68 69 // Functions with the "interrupt" attribute require special prologues, 70 // epilogues and additional spill slots. isISR()71 bool isISR() const { return IsISR; } setISR()72 void setISR() { IsISR = true; } 73 void createISRRegFI(MachineFunction &MF); getISRRegFI(Register Reg)74 int getISRRegFI(Register Reg) const { return ISRDataRegFI[Reg]; } 75 bool isISRRegFI(int FI) const; 76 77 /// Create a MachinePointerInfo that has a GlobalValuePseudoSourceValue object 78 /// representing a GOT entry for a global function. 79 MachinePointerInfo callPtrInfo(MachineFunction &MF, const GlobalValue *GV); 80 setSaveS2()81 void setSaveS2() { SaveS2 = true; } hasSaveS2()82 bool hasSaveS2() const { return SaveS2; } 83 84 int getMoveF64ViaSpillFI(MachineFunction &MF, const TargetRegisterClass *RC); 85 86 std::map<const char *, const Mips16HardFloatInfo::FuncSignature *> 87 StubsNeeded; 88 89 private: 90 virtual void anchor(); 91 92 /// SRetReturnReg - Some subtargets require that sret lowering includes 93 /// returning the value of the returned struct in a register. This field 94 /// holds the virtual register into which the sret argument is passed. 95 Register SRetReturnReg; 96 97 /// GlobalBaseReg - keeps track of the virtual register initialized for 98 /// use as the global base register. This is used for PIC in some PIC 99 /// relocation models. 100 Register GlobalBaseReg; 101 102 /// VarArgsFrameIndex - FrameIndex for start of varargs area. 103 int VarArgsFrameIndex = 0; 104 105 /// True if function has a byval argument. 106 bool HasByvalArg; 107 108 /// Size of incoming argument area. 109 unsigned IncomingArgSize; 110 111 /// CallsEhReturn - Whether the function calls llvm.eh.return. 112 bool CallsEhReturn = false; 113 114 /// Frame objects for spilling eh data registers. 115 int EhDataRegFI[4]; 116 117 /// ISR - Whether the function is an Interrupt Service Routine. 118 bool IsISR = false; 119 120 /// Frame objects for spilling C0_STATUS, C0_EPC 121 int ISRDataRegFI[2]; 122 123 // saveS2 124 bool SaveS2 = false; 125 126 /// FrameIndex for expanding BuildPairF64 nodes to spill and reload when the 127 /// O32 FPXX ABI is enabled. -1 is used to denote invalid index. 128 int MoveF64ViaSpillFI = -1; 129 }; 130 131 } // end namespace llvm 132 133 #endif // LLVM_LIB_TARGET_MIPS_MIPSMACHINEFUNCTION_H 134