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 enum NameDecorationStyle {
27 /// X86MachineFunctionInfo - This class is derived from MachineFunction and
28 /// contains private X86 target-specific information for each MachineFunction.
29 class X86MachineFunctionInfo : public MachineFunctionInfo {
30 /// ForceFramePointer - True if the function is required to use of frame
31 /// pointer for reasons other than it containing dynamic allocation or
32 /// that FP eliminatation is turned off. For example, Cygwin main function
33 /// contains stack pointer re-alignment code which requires FP.
34 bool ForceFramePointer;
36 /// CalleeSavedFrameSize - Size of the callee-saved register portion of the
37 /// stack frame in bytes.
38 unsigned CalleeSavedFrameSize;
40 /// BytesToPopOnReturn - Number of bytes function pops on return.
41 /// Used on windows platform for stdcall & fastcall name decoration
42 unsigned BytesToPopOnReturn;
44 /// DecorationStyle - If the function requires additional name decoration,
45 /// DecorationStyle holds the right way to do so.
46 NameDecorationStyle DecorationStyle;
48 /// ReturnAddrIndex - FrameIndex for return slot.
51 /// TailCallReturnAddrDelta - Delta the ReturnAddr stack slot is moved
52 /// Used for creating an area before the register spill area on the stack
53 /// the returnaddr can be savely move to this area
54 int TailCallReturnAddrDelta;
56 /// SRetReturnReg - Some subtargets require that sret lowering includes
57 /// returning the value of the returned struct in a register. This field
58 /// holds the virtual register into which the sret argument is passed.
59 unsigned SRetReturnReg;
61 /// GlobalBaseReg - keeps track of the virtual register initialized for
62 /// use as the global base register. This is used for PIC in some PIC
63 /// relocation models.
64 unsigned GlobalBaseReg;
67 X86MachineFunctionInfo() : ForceFramePointer(false),
68 CalleeSavedFrameSize(0),
69 BytesToPopOnReturn(0),
70 DecorationStyle(None),
72 TailCallReturnAddrDelta(0),
76 X86MachineFunctionInfo(MachineFunction &MF) : ForceFramePointer(false),
77 CalleeSavedFrameSize(0),
78 BytesToPopOnReturn(0),
79 DecorationStyle(None),
81 TailCallReturnAddrDelta(0),
85 bool getForceFramePointer() const { return ForceFramePointer;}
86 void setForceFramePointer(bool forceFP) { ForceFramePointer = forceFP; }
88 unsigned getCalleeSavedFrameSize() const { return CalleeSavedFrameSize; }
89 void setCalleeSavedFrameSize(unsigned bytes) { CalleeSavedFrameSize = bytes; }
91 unsigned getBytesToPopOnReturn() const { return BytesToPopOnReturn; }
92 void setBytesToPopOnReturn (unsigned bytes) { BytesToPopOnReturn = bytes;}
94 NameDecorationStyle getDecorationStyle() const { return DecorationStyle; }
95 void setDecorationStyle(NameDecorationStyle style) { DecorationStyle = style;}
97 int getRAIndex() const { return ReturnAddrIndex; }
98 void setRAIndex(int Index) { ReturnAddrIndex = Index; }
100 int getTCReturnAddrDelta() const { return TailCallReturnAddrDelta; }
101 void setTCReturnAddrDelta(int delta) {TailCallReturnAddrDelta = delta;}
103 unsigned getSRetReturnReg() const { return SRetReturnReg; }
104 void setSRetReturnReg(unsigned Reg) { SRetReturnReg = Reg; }
106 unsigned getGlobalBaseReg() const { return GlobalBaseReg; }
107 void setGlobalBaseReg(unsigned Reg) { GlobalBaseReg = Reg; }
110 } // End llvm namespace