LLVM  9.0.0svn
MipsMachineFunction.h
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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"
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.
26 public:
28 
29  ~MipsFunctionInfo() override;
30 
31  unsigned getSRetReturnReg() const { return SRetReturnReg; }
32  void setSRetReturnReg(unsigned Reg) { SRetReturnReg = Reg; }
33 
34  bool globalBaseRegSet() const;
35  unsigned getGlobalBaseReg();
36 
37  int getVarArgsFrameIndex() const { return VarArgsFrameIndex; }
38  void setVarArgsFrameIndex(int Index) { VarArgsFrameIndex = Index; }
39 
40  bool hasByvalArg() const { return HasByvalArg; }
41  void setFormalArgInfo(unsigned Size, bool HasByval) {
42  IncomingArgSize = Size;
43  HasByvalArg = HasByval;
44  }
45 
46  unsigned getIncomingArgSize() const { return IncomingArgSize; }
47 
48  bool callsEhReturn() const { return CallsEhReturn; }
49  void setCallsEhReturn() { CallsEhReturn = true; }
50 
51  void createEhDataRegsFI();
52  int getEhDataRegFI(unsigned Reg) const { return EhDataRegFI[Reg]; }
53  bool isEhDataRegFI(int FI) const;
54 
55  /// Create a MachinePointerInfo that has an ExternalSymbolPseudoSourceValue
56  /// object representing a GOT entry for an external function.
57  MachinePointerInfo callPtrInfo(const char *ES);
58 
59  // Functions with the "interrupt" attribute require special prologues,
60  // epilogues and additional spill slots.
61  bool isISR() const { return IsISR; }
62  void setISR() { IsISR = true; }
63  void createISRRegFI();
64  int getISRRegFI(unsigned Reg) const { return ISRDataRegFI[Reg]; }
65  bool isISRRegFI(int FI) const;
66 
67  /// Create a MachinePointerInfo that has a GlobalValuePseudoSourceValue object
68  /// representing a GOT entry for a global function.
70 
71  void setSaveS2() { SaveS2 = true; }
72  bool hasSaveS2() const { return SaveS2; }
73 
75 
76  std::map<const char *, const Mips16HardFloatInfo::FuncSignature *>
78 
79 private:
80  virtual void anchor();
81 
82  MachineFunction& MF;
83 
84  /// SRetReturnReg - Some subtargets require that sret lowering includes
85  /// returning the value of the returned struct in a register. This field
86  /// holds the virtual register into which the sret argument is passed.
87  unsigned SRetReturnReg = 0;
88 
89  /// GlobalBaseReg - keeps track of the virtual register initialized for
90  /// use as the global base register. This is used for PIC in some PIC
91  /// relocation models.
92  unsigned GlobalBaseReg = 0;
93 
94  /// VarArgsFrameIndex - FrameIndex for start of varargs area.
95  int VarArgsFrameIndex = 0;
96 
97  /// True if function has a byval argument.
98  bool HasByvalArg;
99 
100  /// Size of incoming argument area.
101  unsigned IncomingArgSize;
102 
103  /// CallsEhReturn - Whether the function calls llvm.eh.return.
104  bool CallsEhReturn = false;
105 
106  /// Frame objects for spilling eh data registers.
107  int EhDataRegFI[4];
108 
109  /// ISR - Whether the function is an Interrupt Service Routine.
110  bool IsISR = false;
111 
112  /// Frame objects for spilling C0_STATUS, C0_EPC
113  int ISRDataRegFI[2];
114 
115  // saveS2
116  bool SaveS2 = false;
117 
118  /// FrameIndex for expanding BuildPairF64 nodes to spill and reload when the
119  /// O32 FPXX ABI is enabled. -1 is used to denote invalid index.
120  int MoveF64ViaSpillFI = -1;
121 };
122 
123 } // end namespace llvm
124 
125 #endif // LLVM_LIB_TARGET_MIPS_MIPSMACHINEFUNCTION_H
This class represents lattice values for constants.
Definition: AllocatorList.h:23
unsigned Reg
std::map< const char *, const Mips16HardFloatInfo::FuncSignature * > StubsNeeded
int getEhDataRegFI(unsigned Reg) const
void setVarArgsFrameIndex(int Index)
MachineFunctionInfo - This class can be derived from and used by targets to hold private target-speci...
MachinePointerInfo callPtrInfo(const char *ES)
Create a MachinePointerInfo that has an ExternalSymbolPseudoSourceValue object representing a GOT ent...
unsigned getIncomingArgSize() const
This class contains a discriminated union of information about pointers in memory operands...
int getISRRegFI(unsigned Reg) const
void setFormalArgInfo(unsigned Size, bool HasByval)
MipsFunctionInfo(MachineFunction &MF)
int getMoveF64ViaSpillFI(const TargetRegisterClass *RC)
MipsFunctionInfo - This class is derived from MachineFunction private Mips target-specific informatio...
uint32_t Size
Definition: Profile.cpp:46
bool isEhDataRegFI(int FI) const
unsigned getSRetReturnReg() const
bool isISRRegFI(int FI) const
~MipsFunctionInfo() override
void setSRetReturnReg(unsigned Reg)