1 //====- X86MachineFuctionInfo.h - X86 machine function info -----*- 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 X86-specific per-machine-function information.
12 //===----------------------------------------------------------------------===//
14 #ifndef X86MACHINEFUNCTIONINFO_H
15 #define X86MACHINEFUNCTIONINFO_H
17 #include "llvm/CodeGen/MachineFunction.h"
21 /// X86MachineFunctionInfo - This class is derived from MachineFunction and
22 /// contains private X86 target-specific information for each MachineFunction.
23 class X86MachineFunctionInfo : public MachineFunctionInfo {
24 /// ForceFramePointer - True if the function is required to use of frame
25 /// pointer for reasons other than it containing dynamic allocation or
26 /// that FP eliminatation is turned off. For example, Cygwin main function
27 /// contains stack pointer re-alignment code which requires FP.
28 bool ForceFramePointer;
30 /// CalleeSavedFrameSize - Size of the callee-saved register portion of the
31 /// stack frame in bytes.
32 unsigned CalleeSavedFrameSize;
34 /// BytesToPopOnReturn - Number of bytes function pops on return (in addition
35 /// to the space used by the return address).
36 /// Used on windows platform for stdcall & fastcall name decoration
37 unsigned BytesToPopOnReturn;
39 /// ReturnAddrIndex - FrameIndex for return slot.
42 /// TailCallReturnAddrDelta - The number of bytes by which return address
43 /// stack slot is moved as the result of tail call optimization.
44 int TailCallReturnAddrDelta;
46 /// SRetReturnReg - Some subtargets require that sret lowering includes
47 /// returning the value of the returned struct in a register. This field
48 /// holds the virtual register into which the sret argument is passed.
49 unsigned SRetReturnReg;
51 /// GlobalBaseReg - keeps track of the virtual register initialized for
52 /// use as the global base register. This is used for PIC in some PIC
53 /// relocation models.
54 unsigned GlobalBaseReg;
56 /// ReserveFP - whether the function should reserve the frame pointer
57 /// when allocating, even if there may not actually be a frame pointer used.
60 /// VarArgsFrameIndex - FrameIndex for start of varargs area.
61 int VarArgsFrameIndex;
62 /// RegSaveFrameIndex - X86-64 vararg func register save area.
63 int RegSaveFrameIndex;
64 /// VarArgsGPOffset - X86-64 vararg func int reg offset.
65 unsigned VarArgsGPOffset;
66 /// VarArgsFPOffset - X86-64 vararg func fp reg offset.
67 unsigned VarArgsFPOffset;
70 X86MachineFunctionInfo() : ForceFramePointer(false),
71 CalleeSavedFrameSize(0),
72 BytesToPopOnReturn(0),
74 TailCallReturnAddrDelta(0),
82 explicit X86MachineFunctionInfo(MachineFunction &MF)
83 : ForceFramePointer(false),
84 CalleeSavedFrameSize(0),
85 BytesToPopOnReturn(0),
87 TailCallReturnAddrDelta(0),
96 bool getForceFramePointer() const { return ForceFramePointer;}
97 void setForceFramePointer(bool forceFP) { ForceFramePointer = forceFP; }
99 unsigned getCalleeSavedFrameSize() const { return CalleeSavedFrameSize; }
100 void setCalleeSavedFrameSize(unsigned bytes) { CalleeSavedFrameSize = bytes; }
102 unsigned getBytesToPopOnReturn() const { return BytesToPopOnReturn; }
103 void setBytesToPopOnReturn (unsigned bytes) { BytesToPopOnReturn = bytes;}
105 int getRAIndex() const { return ReturnAddrIndex; }
106 void setRAIndex(int Index) { ReturnAddrIndex = Index; }
108 int getTCReturnAddrDelta() const { return TailCallReturnAddrDelta; }
109 void setTCReturnAddrDelta(int delta) {TailCallReturnAddrDelta = delta;}
111 unsigned getSRetReturnReg() const { return SRetReturnReg; }
112 void setSRetReturnReg(unsigned Reg) { SRetReturnReg = Reg; }
114 unsigned getGlobalBaseReg() const { return GlobalBaseReg; }
115 void setGlobalBaseReg(unsigned Reg) { GlobalBaseReg = Reg; }
117 bool getReserveFP() const { return ReserveFP; }
118 void setReserveFP(bool reserveFP) { ReserveFP = reserveFP; }
120 int getVarArgsFrameIndex() const { return VarArgsFrameIndex; }
121 void setVarArgsFrameIndex(int Idx) { VarArgsFrameIndex = Idx; }
123 int getRegSaveFrameIndex() const { return RegSaveFrameIndex; }
124 void setRegSaveFrameIndex(int Idx) { RegSaveFrameIndex = Idx; }
126 unsigned getVarArgsGPOffset() const { return VarArgsGPOffset; }
127 void setVarArgsGPOffset(unsigned Offset) { VarArgsGPOffset = Offset; }
129 unsigned getVarArgsFPOffset() const { return VarArgsFPOffset; }
130 void setVarArgsFPOffset(unsigned Offset) { VarArgsFPOffset = Offset; }
133 } // End llvm namespace