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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@223339 91177308-0d34-0410-b5e6-96231b3b80d8
179 lines
6.9 KiB
C++
179 lines
6.9 KiB
C++
//===-- X86MachineFuctionInfo.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/MachineFunction.h"
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#include "llvm/CodeGen/MachineValueType.h"
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#include <vector>
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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;
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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;
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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;
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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;
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/// ReturnAddrIndex - FrameIndex for return slot.
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int ReturnAddrIndex;
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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;
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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;
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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;
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/// VarArgsFrameIndex - FrameIndex for start of varargs area.
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int VarArgsFrameIndex;
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/// RegSaveFrameIndex - X86-64 vararg func register save area.
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int RegSaveFrameIndex;
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/// VarArgsGPOffset - X86-64 vararg func int reg offset.
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unsigned VarArgsGPOffset;
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/// VarArgsFPOffset - X86-64 vararg func fp reg offset.
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unsigned VarArgsFPOffset;
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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;
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/// NumLocalDynamics - Number of local-dynamic TLS accesses.
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unsigned NumLocalDynamics;
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public:
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/// Describes a register that needs to be forwarded from the prologue to a
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/// musttail call.
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struct Forward {
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Forward(unsigned VReg, MCPhysReg PReg, MVT VT)
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: VReg(VReg), PReg(PReg), VT(VT) {}
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unsigned VReg;
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MCPhysReg PReg;
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MVT VT;
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};
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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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std::vector<Forward> ForwardedMustTailRegParms;
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public:
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X86MachineFunctionInfo() : ForceFramePointer(false),
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RestoreBasePointerOffset(0),
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CalleeSavedFrameSize(0),
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BytesToPopOnReturn(0),
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ReturnAddrIndex(0),
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TailCallReturnAddrDelta(0),
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SRetReturnReg(0),
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GlobalBaseReg(0),
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VarArgsFrameIndex(0),
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RegSaveFrameIndex(0),
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VarArgsGPOffset(0),
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VarArgsFPOffset(0),
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ArgumentStackSize(0),
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NumLocalDynamics(0) {}
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explicit X86MachineFunctionInfo(MachineFunction &MF)
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: ForceFramePointer(false),
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RestoreBasePointerOffset(0),
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CalleeSavedFrameSize(0),
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BytesToPopOnReturn(0),
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ReturnAddrIndex(0),
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TailCallReturnAddrDelta(0),
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SRetReturnReg(0),
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GlobalBaseReg(0),
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VarArgsFrameIndex(0),
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RegSaveFrameIndex(0),
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VarArgsGPOffset(0),
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VarArgsFPOffset(0),
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ArgumentStackSize(0),
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NumLocalDynamics(0) {}
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bool getForceFramePointer() const { return ForceFramePointer;}
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void setForceFramePointer(bool forceFP) { ForceFramePointer = forceFP; }
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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 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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std::vector<Forward> &getForwardedMustTailRegParms() {
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return ForwardedMustTailRegParms;
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}
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};
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} // End llvm namespace
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#endif
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