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//===-- X86MachineFuctionInfo.h - X86 machine function info -----*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file declares X86-specific per-machine-function information.
//
//===----------------------------------------------------------------------===//
#ifndef X86MACHINEFUNCTIONINFO_H
#define X86MACHINEFUNCTIONINFO_H
#include "llvm/CodeGen/MachineFunction.h"
namespace llvm {
/// X86MachineFunctionInfo - This class is derived from MachineFunction and
/// contains private X86 target-specific information for each MachineFunction.
class X86MachineFunctionInfo : public MachineFunctionInfo {
virtual void anchor();
/// ForceFramePointer - True if the function is required to use of frame
/// pointer for reasons other than it containing dynamic allocation or
/// that FP eliminatation is turned off. For example, Cygwin main function
/// contains stack pointer re-alignment code which requires FP.
bool ForceFramePointer;
/// CalleeSavedFrameSize - Size of the callee-saved register portion of the
/// stack frame in bytes.
unsigned CalleeSavedFrameSize;
/// BytesToPopOnReturn - Number of bytes function pops on return (in addition
/// to the space used by the return address).
/// Used on windows platform for stdcall & fastcall name decoration
unsigned BytesToPopOnReturn;
/// ReturnAddrIndex - FrameIndex for return slot.
int ReturnAddrIndex;
/// TailCallReturnAddrDelta - The number of bytes by which return address
/// stack slot is moved as the result of tail call optimization.
int TailCallReturnAddrDelta;
/// SRetReturnReg - Some subtargets require that sret lowering includes
/// returning the value of the returned struct in a register. This field
/// holds the virtual register into which the sret argument is passed.
unsigned SRetReturnReg;
/// GlobalBaseReg - keeps track of the virtual register initialized for
/// use as the global base register. This is used for PIC in some PIC
/// relocation models.
unsigned GlobalBaseReg;
/// VarArgsFrameIndex - FrameIndex for start of varargs area.
int VarArgsFrameIndex;
/// RegSaveFrameIndex - X86-64 vararg func register save area.
int RegSaveFrameIndex;
/// VarArgsGPOffset - X86-64 vararg func int reg offset.
unsigned VarArgsGPOffset;
/// VarArgsFPOffset - X86-64 vararg func fp reg offset.
unsigned VarArgsFPOffset;
/// ArgumentStackSize - The number of bytes on stack consumed by the arguments
/// being passed on the stack.
unsigned ArgumentStackSize;
/// NumLocalDynamics - Number of local-dynamic TLS accesses.
unsigned NumLocalDynamics;
/// After the stack pointer has been restore from the base pointer we
/// use a cached adjusment.
int64_t BPAdj;
public:
X86MachineFunctionInfo() : ForceFramePointer(false),
CalleeSavedFrameSize(0),
BytesToPopOnReturn(0),
ReturnAddrIndex(0),
TailCallReturnAddrDelta(0),
SRetReturnReg(0),
GlobalBaseReg(0),
VarArgsFrameIndex(0),
RegSaveFrameIndex(0),
VarArgsGPOffset(0),
VarArgsFPOffset(0),
ArgumentStackSize(0),
NumLocalDynamics(0) {}
explicit X86MachineFunctionInfo(MachineFunction &MF)
: ForceFramePointer(false),
CalleeSavedFrameSize(0),
BytesToPopOnReturn(0),
ReturnAddrIndex(0),
TailCallReturnAddrDelta(0),
SRetReturnReg(0),
GlobalBaseReg(0),
VarArgsFrameIndex(0),
RegSaveFrameIndex(0),
VarArgsGPOffset(0),
VarArgsFPOffset(0),
ArgumentStackSize(0),
NumLocalDynamics(0),
BPAdj(0) {}
bool getForceFramePointer() const { return ForceFramePointer;}
void setForceFramePointer(bool forceFP) { ForceFramePointer = forceFP; }
unsigned getCalleeSavedFrameSize() const { return CalleeSavedFrameSize; }
void setCalleeSavedFrameSize(unsigned bytes) { CalleeSavedFrameSize = bytes; }
unsigned getBytesToPopOnReturn() const { return BytesToPopOnReturn; }
void setBytesToPopOnReturn (unsigned bytes) { BytesToPopOnReturn = bytes;}
int getRAIndex() const { return ReturnAddrIndex; }
void setRAIndex(int Index) { ReturnAddrIndex = Index; }
int getTCReturnAddrDelta() const { return TailCallReturnAddrDelta; }
void setTCReturnAddrDelta(int delta) {TailCallReturnAddrDelta = delta;}
unsigned getSRetReturnReg() const { return SRetReturnReg; }
void setSRetReturnReg(unsigned Reg) { SRetReturnReg = Reg; }
unsigned getGlobalBaseReg() const { return GlobalBaseReg; }
void setGlobalBaseReg(unsigned Reg) { GlobalBaseReg = Reg; }
int getVarArgsFrameIndex() const { return VarArgsFrameIndex; }
void setVarArgsFrameIndex(int Idx) { VarArgsFrameIndex = Idx; }
int getRegSaveFrameIndex() const { return RegSaveFrameIndex; }
void setRegSaveFrameIndex(int Idx) { RegSaveFrameIndex = Idx; }
unsigned getVarArgsGPOffset() const { return VarArgsGPOffset; }
void setVarArgsGPOffset(unsigned Offset) { VarArgsGPOffset = Offset; }
unsigned getVarArgsFPOffset() const { return VarArgsFPOffset; }
void setVarArgsFPOffset(unsigned Offset) { VarArgsFPOffset = Offset; }
unsigned getArgumentStackSize() const { return ArgumentStackSize; }
void setArgumentStackSize(unsigned size) { ArgumentStackSize = size; }
unsigned getNumLocalDynamicTLSAccesses() const { return NumLocalDynamics; }
void incNumLocalDynamicTLSAccesses() { ++NumLocalDynamics; }
/// setBasePtrStackAdjustment - If we're restoring the stack pointer from the
/// base pointer, due to dynamic stack realignment + VLAs, we cache the
/// number of bytes initially allocated for the stack frame. In obscure
/// cases (e.g., tail calls with byval argument and no stack protector), the
/// stack gets adjusted outside of the prolog, but these shouldn't be
/// considered when restoring from the base pointer. Currently, this is only
/// needed for x86.
void setBasePtrStackAdjustment(int64_t adj) { BPAdj = adj; }
int64_t getBasePtrStackAdjustment() const { return BPAdj; }
};
} // End llvm namespace
#endif
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