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.
35 /// Used on windows platform for stdcall & fastcall name decoration
36 unsigned BytesToPopOnReturn;
38 /// ReturnAddrIndex - FrameIndex for return slot.
41 /// TailCallReturnAddrDelta - The number of bytes by which return address
42 /// stack slot is moved as the result of tail call optimization.
43 int TailCallReturnAddrDelta;
45 /// SRetReturnReg - Some subtargets require that sret lowering includes
46 /// returning the value of the returned struct in a register. This field
47 /// holds the virtual register into which the sret argument is passed.
48 unsigned SRetReturnReg;
50 /// GlobalBaseReg - keeps track of the virtual register initialized for
51 /// use as the global base register. This is used for PIC in some PIC
52 /// relocation models.
53 unsigned GlobalBaseReg;
55 /// ReserveFP - whether the function should reserve the frame pointer
56 /// when allocating, even if there may not actually be a frame pointer used.
60 X86MachineFunctionInfo() : ForceFramePointer(false),
61 CalleeSavedFrameSize(0),
62 BytesToPopOnReturn(0),
64 TailCallReturnAddrDelta(0),
68 explicit X86MachineFunctionInfo(MachineFunction &MF)
69 : ForceFramePointer(false),
70 CalleeSavedFrameSize(0),
71 BytesToPopOnReturn(0),
73 TailCallReturnAddrDelta(0),
78 bool getForceFramePointer() const { return ForceFramePointer;}
79 void setForceFramePointer(bool forceFP) { ForceFramePointer = forceFP; }
81 unsigned getCalleeSavedFrameSize() const { return CalleeSavedFrameSize; }
82 void setCalleeSavedFrameSize(unsigned bytes) { CalleeSavedFrameSize = bytes; }
84 unsigned getBytesToPopOnReturn() const { return BytesToPopOnReturn; }
85 void setBytesToPopOnReturn (unsigned bytes) { BytesToPopOnReturn = bytes;}
87 int getRAIndex() const { return ReturnAddrIndex; }
88 void setRAIndex(int Index) { ReturnAddrIndex = Index; }
90 int getTCReturnAddrDelta() const { return TailCallReturnAddrDelta; }
91 void setTCReturnAddrDelta(int delta) {TailCallReturnAddrDelta = delta;}
93 unsigned getSRetReturnReg() const { return SRetReturnReg; }
94 void setSRetReturnReg(unsigned Reg) { SRetReturnReg = Reg; }
96 unsigned getGlobalBaseReg() const { return GlobalBaseReg; }
97 void setGlobalBaseReg(unsigned Reg) { GlobalBaseReg = Reg; }
99 bool getReserveFP() const { return ReserveFP; }
100 void setReserveFP(bool reserveFP) { ReserveFP = reserveFP; }
103 } // End llvm namespace