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//===-- X86MachineFunctionInfo.h - X86 machine function info ----*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file declares X86-specific per-machine-function information.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_TARGET_X86_X86MACHINEFUNCTIONINFO_H
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#define LLVM_LIB_TARGET_X86_X86MACHINEFUNCTIONINFO_H
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#include "llvm/CodeGen/CallingConvLower.h"
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#include "llvm/CodeGen/MachineFunction.h"
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#include "llvm/CodeGen/MachineValueType.h"
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namespace llvm {
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/// X86MachineFunctionInfo - This class is derived from MachineFunction and
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/// contains private X86 target-specific information for each MachineFunction.
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class X86MachineFunctionInfo : public MachineFunctionInfo {
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virtual void anchor();
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/// ForceFramePointer - True if the function is required to use of frame
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/// pointer for reasons other than it containing dynamic allocation or
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/// that FP eliminatation is turned off. For example, Cygwin main function
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/// contains stack pointer re-alignment code which requires FP.
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bool ForceFramePointer = false;
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/// RestoreBasePointerOffset - Non-zero if the function has base pointer
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/// and makes call to llvm.eh.sjlj.setjmp. When non-zero, the value is a
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/// displacement from the frame pointer to a slot where the base pointer
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/// is stashed.
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signed char RestoreBasePointerOffset = 0;
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/// CalleeSavedFrameSize - Size of the callee-saved register portion of the
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/// stack frame in bytes.
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unsigned CalleeSavedFrameSize = 0;
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/// BytesToPopOnReturn - Number of bytes function pops on return (in addition
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/// to the space used by the return address).
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/// Used on windows platform for stdcall & fastcall name decoration
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unsigned BytesToPopOnReturn = 0;
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/// ReturnAddrIndex - FrameIndex for return slot.
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int ReturnAddrIndex = 0;
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/// \brief FrameIndex for return slot.
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int FrameAddrIndex = 0;
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/// TailCallReturnAddrDelta - The number of bytes by which return address
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/// stack slot is moved as the result of tail call optimization.
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int TailCallReturnAddrDelta = 0;
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/// SRetReturnReg - Some subtargets require that sret lowering includes
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/// returning the value of the returned struct in a register. This field
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/// holds the virtual register into which the sret argument is passed.
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unsigned SRetReturnReg = 0;
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/// GlobalBaseReg - keeps track of the virtual register initialized for
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/// use as the global base register. This is used for PIC in some PIC
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/// relocation models.
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unsigned GlobalBaseReg = 0;
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/// VarArgsFrameIndex - FrameIndex for start of varargs area.
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int VarArgsFrameIndex = 0;
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/// RegSaveFrameIndex - X86-64 vararg func register save area.
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int RegSaveFrameIndex = 0;
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/// VarArgsGPOffset - X86-64 vararg func int reg offset.
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unsigned VarArgsGPOffset = 0;
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/// VarArgsFPOffset - X86-64 vararg func fp reg offset.
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unsigned VarArgsFPOffset = 0;
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/// ArgumentStackSize - The number of bytes on stack consumed by the arguments
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/// being passed on the stack.
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unsigned ArgumentStackSize = 0;
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/// NumLocalDynamics - Number of local-dynamic TLS accesses.
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unsigned NumLocalDynamics = 0;
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/// HasPushSequences - Keeps track of whether this function uses sequences
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/// of pushes to pass function parameters.
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bool HasPushSequences = false;
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/// True if the function recovers from an SEH exception, and therefore needs
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/// to spill and restore the frame pointer.
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bool HasSEHFramePtrSave = false;
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/// The frame index of a stack object containing the original frame pointer
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/// used to address arguments in a function using a base pointer.
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int SEHFramePtrSaveIndex = 0;
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/// True if this function has a subset of CSRs that is handled explicitly via
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/// copies.
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bool IsSplitCSR = false;
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/// True if this function uses the red zone.
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bool UsesRedZone = false;
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/// True if this function has WIN_ALLOCA instructions.
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bool HasWinAlloca = false;
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private:
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/// ForwardedMustTailRegParms - A list of virtual and physical registers
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/// that must be forwarded to every musttail call.
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SmallVector<ForwardedRegister, 1> ForwardedMustTailRegParms;
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public:
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X86MachineFunctionInfo() = default;
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explicit X86MachineFunctionInfo(MachineFunction &MF) {}
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bool getForceFramePointer() const { return ForceFramePointer;}
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void setForceFramePointer(bool forceFP) { ForceFramePointer = forceFP; }
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bool getHasPushSequences() const { return HasPushSequences; }
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void setHasPushSequences(bool HasPush) { HasPushSequences = HasPush; }
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bool getRestoreBasePointer() const { return RestoreBasePointerOffset!=0; }
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void setRestoreBasePointer(const MachineFunction *MF);
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int getRestoreBasePointerOffset() const {return RestoreBasePointerOffset; }
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unsigned getCalleeSavedFrameSize() const { return CalleeSavedFrameSize; }
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void setCalleeSavedFrameSize(unsigned bytes) { CalleeSavedFrameSize = bytes; }
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unsigned getBytesToPopOnReturn() const { return BytesToPopOnReturn; }
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void setBytesToPopOnReturn (unsigned bytes) { BytesToPopOnReturn = bytes;}
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int getRAIndex() const { return ReturnAddrIndex; }
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void setRAIndex(int Index) { ReturnAddrIndex = Index; }
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int getFAIndex() const { return FrameAddrIndex; }
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void setFAIndex(int Index) { FrameAddrIndex = Index; }
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int getTCReturnAddrDelta() const { return TailCallReturnAddrDelta; }
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void setTCReturnAddrDelta(int delta) {TailCallReturnAddrDelta = delta;}
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unsigned getSRetReturnReg() const { return SRetReturnReg; }
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void setSRetReturnReg(unsigned Reg) { SRetReturnReg = Reg; }
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unsigned getGlobalBaseReg() const { return GlobalBaseReg; }
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void setGlobalBaseReg(unsigned Reg) { GlobalBaseReg = Reg; }
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int getVarArgsFrameIndex() const { return VarArgsFrameIndex; }
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void setVarArgsFrameIndex(int Idx) { VarArgsFrameIndex = Idx; }
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int getRegSaveFrameIndex() const { return RegSaveFrameIndex; }
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void setRegSaveFrameIndex(int Idx) { RegSaveFrameIndex = Idx; }
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unsigned getVarArgsGPOffset() const { return VarArgsGPOffset; }
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void setVarArgsGPOffset(unsigned Offset) { VarArgsGPOffset = Offset; }
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unsigned getVarArgsFPOffset() const { return VarArgsFPOffset; }
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void setVarArgsFPOffset(unsigned Offset) { VarArgsFPOffset = Offset; }
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unsigned getArgumentStackSize() const { return ArgumentStackSize; }
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void setArgumentStackSize(unsigned size) { ArgumentStackSize = size; }
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unsigned getNumLocalDynamicTLSAccesses() const { return NumLocalDynamics; }
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void incNumLocalDynamicTLSAccesses() { ++NumLocalDynamics; }
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bool getHasSEHFramePtrSave() const { return HasSEHFramePtrSave; }
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void setHasSEHFramePtrSave(bool V) { HasSEHFramePtrSave = V; }
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int getSEHFramePtrSaveIndex() const { return SEHFramePtrSaveIndex; }
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void setSEHFramePtrSaveIndex(int Index) { SEHFramePtrSaveIndex = Index; }
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SmallVectorImpl<ForwardedRegister> &getForwardedMustTailRegParms() {
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return ForwardedMustTailRegParms;
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}
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bool isSplitCSR() const { return IsSplitCSR; }
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void setIsSplitCSR(bool s) { IsSplitCSR = s; }
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bool getUsesRedZone() const { return UsesRedZone; }
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void setUsesRedZone(bool V) { UsesRedZone = V; }
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bool hasWinAlloca() const { return HasWinAlloca; }
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void setHasWinAlloca(bool v) { HasWinAlloca = v; }
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};
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} // End llvm namespace
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#endif
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