1 //===-- MipsMachineFunctionInfo.h - Private data used for Mips ----*- C++ -*-=//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file declares the Mips specific subclass of MachineFunctionInfo.
12 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_LIB_TARGET_MIPS_MIPSMACHINEFUNCTION_H
15 #define LLVM_LIB_TARGET_MIPS_MIPSMACHINEFUNCTION_H
17 #include "Mips16HardFloatInfo.h"
18 #include "llvm/CodeGen/MachineFrameInfo.h"
19 #include "llvm/CodeGen/MachineFunction.h"
20 #include "llvm/CodeGen/MachineMemOperand.h"
21 #include "llvm/CodeGen/PseudoSourceValue.h"
22 #include "llvm/Target/TargetFrameLowering.h"
23 #include "llvm/Target/TargetMachine.h"
28 /// MipsFunctionInfo - This class is derived from MachineFunction private
29 /// Mips target-specific information for each MachineFunction.
30 class MipsFunctionInfo : public MachineFunctionInfo {
32 MipsFunctionInfo(MachineFunction &MF)
33 : MF(MF), SRetReturnReg(0), GlobalBaseReg(0), VarArgsFrameIndex(0),
34 CallsEhReturn(false), IsISR(false), SaveS2(false),
35 MoveF64ViaSpillFI(-1) {}
39 unsigned getSRetReturnReg() const { return SRetReturnReg; }
40 void setSRetReturnReg(unsigned Reg) { SRetReturnReg = Reg; }
42 bool globalBaseRegSet() const;
43 unsigned getGlobalBaseReg();
45 int getVarArgsFrameIndex() const { return VarArgsFrameIndex; }
46 void setVarArgsFrameIndex(int Index) { VarArgsFrameIndex = Index; }
48 bool hasByvalArg() const { return HasByvalArg; }
49 void setFormalArgInfo(unsigned Size, bool HasByval) {
50 IncomingArgSize = Size;
51 HasByvalArg = HasByval;
54 unsigned getIncomingArgSize() const { return IncomingArgSize; }
56 bool callsEhReturn() const { return CallsEhReturn; }
57 void setCallsEhReturn() { CallsEhReturn = true; }
59 void createEhDataRegsFI();
60 int getEhDataRegFI(unsigned Reg) const { return EhDataRegFI[Reg]; }
61 bool isEhDataRegFI(int FI) const;
63 /// Create a MachinePointerInfo that has an ExternalSymbolPseudoSourceValue
64 /// object representing a GOT entry for an external function.
65 MachinePointerInfo callPtrInfo(const char *ES);
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;
75 /// Create a MachinePointerInfo that has a GlobalValuePseudoSourceValue object
76 /// representing a GOT entry for a global function.
77 MachinePointerInfo callPtrInfo(const GlobalValue *GV);
79 void setSaveS2() { SaveS2 = true; }
80 bool hasSaveS2() const { return SaveS2; }
82 int getMoveF64ViaSpillFI(const TargetRegisterClass *RC);
84 std::map<const char *, const llvm::Mips16HardFloatInfo::FuncSignature *>
88 virtual void anchor();
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;
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;
101 /// VarArgsFrameIndex - FrameIndex for start of varargs area.
102 int VarArgsFrameIndex;
104 /// True if function has a byval argument.
107 /// Size of incoming argument area.
108 unsigned IncomingArgSize;
110 /// CallsEhReturn - Whether the function calls llvm.eh.return.
113 /// Frame objects for spilling eh data registers.
116 /// ISR - Whether the function is an Interrupt Service Routine.
119 /// Frame objects for spilling C0_STATUS, C0_EPC
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;
130 } // end of namespace llvm