LLVM  4.0.0
MipsMachineFunction.h
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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"
24 #include <map>
25 
26 namespace llvm {
27 
28 /// MipsFunctionInfo - This class is derived from MachineFunction private
29 /// Mips target-specific information for each MachineFunction.
31 public:
33  : MF(MF), SRetReturnReg(0), GlobalBaseReg(0), VarArgsFrameIndex(0),
34  CallsEhReturn(false), IsISR(false), SaveS2(false),
35  MoveF64ViaSpillFI(-1) {}
36 
38 
39  unsigned getSRetReturnReg() const { return SRetReturnReg; }
40  void setSRetReturnReg(unsigned Reg) { SRetReturnReg = Reg; }
41 
42  bool globalBaseRegSet() const;
43  unsigned getGlobalBaseReg();
44 
45  int getVarArgsFrameIndex() const { return VarArgsFrameIndex; }
46  void setVarArgsFrameIndex(int Index) { VarArgsFrameIndex = Index; }
47 
48  bool hasByvalArg() const { return HasByvalArg; }
49  void setFormalArgInfo(unsigned Size, bool HasByval) {
50  IncomingArgSize = Size;
51  HasByvalArg = HasByval;
52  }
53 
54  unsigned getIncomingArgSize() const { return IncomingArgSize; }
55 
56  bool callsEhReturn() const { return CallsEhReturn; }
57  void setCallsEhReturn() { CallsEhReturn = true; }
58 
59  void createEhDataRegsFI();
60  int getEhDataRegFI(unsigned Reg) const { return EhDataRegFI[Reg]; }
61  bool isEhDataRegFI(int FI) const;
62 
63  /// Create a MachinePointerInfo that has an ExternalSymbolPseudoSourceValue
64  /// object representing a GOT entry for an external function.
65  MachinePointerInfo callPtrInfo(const char *ES);
66 
67  // Functions with the "interrupt" attribute require special prologues,
68  // epilogues and additional spill slots.
69  bool isISR() const { return IsISR; }
70  void setISR() { IsISR = true; }
71  void createISRRegFI();
72  int getISRRegFI(unsigned Reg) const { return ISRDataRegFI[Reg]; }
73  bool isISRRegFI(int FI) const;
74 
75  /// Create a MachinePointerInfo that has a GlobalValuePseudoSourceValue object
76  /// representing a GOT entry for a global function.
78 
79  void setSaveS2() { SaveS2 = true; }
80  bool hasSaveS2() const { return SaveS2; }
81 
83 
84  std::map<const char *, const llvm::Mips16HardFloatInfo::FuncSignature *>
86 
87 private:
88  virtual void anchor();
89 
90  MachineFunction& MF;
91  /// SRetReturnReg - Some subtargets require that sret lowering includes
92  /// returning the value of the returned struct in a register. This field
93  /// holds the virtual register into which the sret argument is passed.
94  unsigned SRetReturnReg;
95 
96  /// GlobalBaseReg - keeps track of the virtual register initialized for
97  /// use as the global base register. This is used for PIC in some PIC
98  /// relocation models.
99  unsigned GlobalBaseReg;
100 
101  /// VarArgsFrameIndex - FrameIndex for start of varargs area.
102  int VarArgsFrameIndex;
103 
104  /// True if function has a byval argument.
105  bool HasByvalArg;
106 
107  /// Size of incoming argument area.
108  unsigned IncomingArgSize;
109 
110  /// CallsEhReturn - Whether the function calls llvm.eh.return.
111  bool CallsEhReturn;
112 
113  /// Frame objects for spilling eh data registers.
114  int EhDataRegFI[4];
115 
116  /// ISR - Whether the function is an Interrupt Service Routine.
117  bool IsISR;
118 
119  /// Frame objects for spilling C0_STATUS, C0_EPC
120  int ISRDataRegFI[2];
121 
122  // saveS2
123  bool SaveS2;
124 
125  /// FrameIndex for expanding BuildPairF64 nodes to spill and reload when the
126  /// O32 FPXX ABI is enabled. -1 is used to denote invalid index.
127  int MoveF64ViaSpillFI;
128 };
129 
130 } // end of namespace llvm
131 
132 #endif
unsigned getIncomingArgSize() 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 getSRetReturnReg() const
Reg
All possible values of the reg field in the ModR/M byte.
Function Alias Analysis false
int getEhDataRegFI(unsigned Reg) const
bool isISRRegFI(int FI) const
This class contains a discriminated union of information about pointers in memory operands...
bool isEhDataRegFI(int FI) const
int getISRRegFI(unsigned Reg) const
void setFormalArgInfo(unsigned Size, bool HasByval)
std::map< const char *, const llvm::Mips16HardFloatInfo::FuncSignature * > StubsNeeded
MipsFunctionInfo(MachineFunction &MF)
int getMoveF64ViaSpillFI(const TargetRegisterClass *RC)
MipsFunctionInfo - This class is derived from MachineFunction private Mips target-specific informatio...
void setSRetReturnReg(unsigned Reg)