1 //===-- X86MachineFuctionInfo.h - X86 machine function info -----*- 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 X86-specific per-machine-function information. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #ifndef LLVM_LIB_TARGET_X86_X86MACHINEFUNCTIONINFO_H 15 #define LLVM_LIB_TARGET_X86_X86MACHINEFUNCTIONINFO_H 16 17 #include "llvm/CodeGen/CallingConvLower.h" 18 #include "llvm/CodeGen/MachineFunction.h" 19 #include "llvm/CodeGen/MachineValueType.h" 20 #include <vector> 21 22 namespace llvm { 23 24 /// X86MachineFunctionInfo - This class is derived from MachineFunction and 25 /// contains private X86 target-specific information for each MachineFunction. 26 class X86MachineFunctionInfo : public MachineFunctionInfo { 27 virtual void anchor(); 28 29 /// ForceFramePointer - True if the function is required to use of frame 30 /// pointer for reasons other than it containing dynamic allocation or 31 /// that FP eliminatation is turned off. For example, Cygwin main function 32 /// contains stack pointer re-alignment code which requires FP. 33 bool ForceFramePointer; 34 35 /// RestoreBasePointerOffset - Non-zero if the function has base pointer 36 /// and makes call to llvm.eh.sjlj.setjmp. When non-zero, the value is a 37 /// displacement from the frame pointer to a slot where the base pointer 38 /// is stashed. 39 signed char RestoreBasePointerOffset; 40 41 /// CalleeSavedFrameSize - Size of the callee-saved register portion of the 42 /// stack frame in bytes. 43 unsigned CalleeSavedFrameSize; 44 45 /// BytesToPopOnReturn - Number of bytes function pops on return (in addition 46 /// to the space used by the return address). 47 /// Used on windows platform for stdcall & fastcall name decoration 48 unsigned BytesToPopOnReturn; 49 50 /// ReturnAddrIndex - FrameIndex for return slot. 51 int ReturnAddrIndex; 52 53 /// TailCallReturnAddrDelta - The number of bytes by which return address 54 /// stack slot is moved as the result of tail call optimization. 55 int TailCallReturnAddrDelta; 56 57 /// SRetReturnReg - Some subtargets require that sret lowering includes 58 /// returning the value of the returned struct in a register. This field 59 /// holds the virtual register into which the sret argument is passed. 60 unsigned SRetReturnReg; 61 62 /// GlobalBaseReg - keeps track of the virtual register initialized for 63 /// use as the global base register. This is used for PIC in some PIC 64 /// relocation models. 65 unsigned GlobalBaseReg; 66 67 /// VarArgsFrameIndex - FrameIndex for start of varargs area. 68 int VarArgsFrameIndex; 69 /// RegSaveFrameIndex - X86-64 vararg func register save area. 70 int RegSaveFrameIndex; 71 /// VarArgsGPOffset - X86-64 vararg func int reg offset. 72 unsigned VarArgsGPOffset; 73 /// VarArgsFPOffset - X86-64 vararg func fp reg offset. 74 unsigned VarArgsFPOffset; 75 /// ArgumentStackSize - The number of bytes on stack consumed by the arguments 76 /// being passed on the stack. 77 unsigned ArgumentStackSize; 78 /// NumLocalDynamics - Number of local-dynamic TLS accesses. 79 unsigned NumLocalDynamics; 80 81 private: 82 /// ForwardedMustTailRegParms - A list of virtual and physical registers 83 /// that must be forwarded to every musttail call. 84 SmallVector<ForwardedRegister, 1> ForwardedMustTailRegParms; 85 86 public: X86MachineFunctionInfo()87 X86MachineFunctionInfo() : ForceFramePointer(false), 88 RestoreBasePointerOffset(0), 89 CalleeSavedFrameSize(0), 90 BytesToPopOnReturn(0), 91 ReturnAddrIndex(0), 92 TailCallReturnAddrDelta(0), 93 SRetReturnReg(0), 94 GlobalBaseReg(0), 95 VarArgsFrameIndex(0), 96 RegSaveFrameIndex(0), 97 VarArgsGPOffset(0), 98 VarArgsFPOffset(0), 99 ArgumentStackSize(0), 100 NumLocalDynamics(0) {} 101 X86MachineFunctionInfo(MachineFunction & MF)102 explicit X86MachineFunctionInfo(MachineFunction &MF) 103 : ForceFramePointer(false), 104 RestoreBasePointerOffset(0), 105 CalleeSavedFrameSize(0), 106 BytesToPopOnReturn(0), 107 ReturnAddrIndex(0), 108 TailCallReturnAddrDelta(0), 109 SRetReturnReg(0), 110 GlobalBaseReg(0), 111 VarArgsFrameIndex(0), 112 RegSaveFrameIndex(0), 113 VarArgsGPOffset(0), 114 VarArgsFPOffset(0), 115 ArgumentStackSize(0), 116 NumLocalDynamics(0) {} 117 getForceFramePointer()118 bool getForceFramePointer() const { return ForceFramePointer;} setForceFramePointer(bool forceFP)119 void setForceFramePointer(bool forceFP) { ForceFramePointer = forceFP; } 120 getRestoreBasePointer()121 bool getRestoreBasePointer() const { return RestoreBasePointerOffset!=0; } 122 void setRestoreBasePointer(const MachineFunction *MF); getRestoreBasePointerOffset()123 int getRestoreBasePointerOffset() const {return RestoreBasePointerOffset; } 124 getCalleeSavedFrameSize()125 unsigned getCalleeSavedFrameSize() const { return CalleeSavedFrameSize; } setCalleeSavedFrameSize(unsigned bytes)126 void setCalleeSavedFrameSize(unsigned bytes) { CalleeSavedFrameSize = bytes; } 127 getBytesToPopOnReturn()128 unsigned getBytesToPopOnReturn() const { return BytesToPopOnReturn; } setBytesToPopOnReturn(unsigned bytes)129 void setBytesToPopOnReturn (unsigned bytes) { BytesToPopOnReturn = bytes;} 130 getRAIndex()131 int getRAIndex() const { return ReturnAddrIndex; } setRAIndex(int Index)132 void setRAIndex(int Index) { ReturnAddrIndex = Index; } 133 getTCReturnAddrDelta()134 int getTCReturnAddrDelta() const { return TailCallReturnAddrDelta; } setTCReturnAddrDelta(int delta)135 void setTCReturnAddrDelta(int delta) {TailCallReturnAddrDelta = delta;} 136 getSRetReturnReg()137 unsigned getSRetReturnReg() const { return SRetReturnReg; } setSRetReturnReg(unsigned Reg)138 void setSRetReturnReg(unsigned Reg) { SRetReturnReg = Reg; } 139 getGlobalBaseReg()140 unsigned getGlobalBaseReg() const { return GlobalBaseReg; } setGlobalBaseReg(unsigned Reg)141 void setGlobalBaseReg(unsigned Reg) { GlobalBaseReg = Reg; } 142 getVarArgsFrameIndex()143 int getVarArgsFrameIndex() const { return VarArgsFrameIndex; } setVarArgsFrameIndex(int Idx)144 void setVarArgsFrameIndex(int Idx) { VarArgsFrameIndex = Idx; } 145 getRegSaveFrameIndex()146 int getRegSaveFrameIndex() const { return RegSaveFrameIndex; } setRegSaveFrameIndex(int Idx)147 void setRegSaveFrameIndex(int Idx) { RegSaveFrameIndex = Idx; } 148 getVarArgsGPOffset()149 unsigned getVarArgsGPOffset() const { return VarArgsGPOffset; } setVarArgsGPOffset(unsigned Offset)150 void setVarArgsGPOffset(unsigned Offset) { VarArgsGPOffset = Offset; } 151 getVarArgsFPOffset()152 unsigned getVarArgsFPOffset() const { return VarArgsFPOffset; } setVarArgsFPOffset(unsigned Offset)153 void setVarArgsFPOffset(unsigned Offset) { VarArgsFPOffset = Offset; } 154 getArgumentStackSize()155 unsigned getArgumentStackSize() const { return ArgumentStackSize; } setArgumentStackSize(unsigned size)156 void setArgumentStackSize(unsigned size) { ArgumentStackSize = size; } 157 getNumLocalDynamicTLSAccesses()158 unsigned getNumLocalDynamicTLSAccesses() const { return NumLocalDynamics; } incNumLocalDynamicTLSAccesses()159 void incNumLocalDynamicTLSAccesses() { ++NumLocalDynamics; } 160 getForwardedMustTailRegParms()161 SmallVectorImpl<ForwardedRegister> &getForwardedMustTailRegParms() { 162 return ForwardedMustTailRegParms; 163 } 164 }; 165 166 } // End llvm namespace 167 168 #endif 169