LLVM  9.0.0svn
MipsMachineFunction.h
Go to the documentation of this file.
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;
37 
38  // Insert instructions to initialize the global base register in the
39  // first MBB of the function.
40  void initGlobalBaseReg();
41 
42  int getVarArgsFrameIndex() const { return VarArgsFrameIndex; }
43  void setVarArgsFrameIndex(int Index) { VarArgsFrameIndex = Index; }
44 
45  bool hasByvalArg() const { return HasByvalArg; }
46  void setFormalArgInfo(unsigned Size, bool HasByval) {
47  IncomingArgSize = Size;
48  HasByvalArg = HasByval;
49  }
50 
51  unsigned getIncomingArgSize() const { return IncomingArgSize; }
52 
53  bool callsEhReturn() const { return CallsEhReturn; }
54  void setCallsEhReturn() { CallsEhReturn = true; }
55 
56  void createEhDataRegsFI();
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.
66  bool isISR() const { return IsISR; }
67  void setISR() { IsISR = true; }
68  void createISRRegFI();
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.
75 
76  void setSaveS2() { SaveS2 = true; }
77  bool hasSaveS2() const { return SaveS2; }
78 
80 
81  std::map<const char *, const Mips16HardFloatInfo::FuncSignature *>
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
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
Wrapper class representing virtual and physical registers.
Definition: Register.h:18
bool isISRRegFI(int FI) const
~MipsFunctionInfo() override
void setSRetReturnReg(unsigned Reg)