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114 lines
4.2 KiB
C++
114 lines
4.2 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 X86MACHINEFUNCTIONINFO_H
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#define X86MACHINEFUNCTIONINFO_H
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#include "llvm/CodeGen/MachineFunction.h"
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namespace llvm {
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enum NameDecorationStyle {
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None,
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StdCall,
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FastCall
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};
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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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/// 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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/// 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.
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/// Used on windows platform for stdcall & fastcall name decoration
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unsigned BytesToPopOnReturn;
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/// DecorationStyle - If the function requires additional name decoration,
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/// DecorationStyle holds the right way to do so.
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NameDecorationStyle DecorationStyle;
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/// ReturnAddrIndex - FrameIndex for return slot.
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int ReturnAddrIndex;
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/// TailCallReturnAddrDelta - Delta the ReturnAddr stack slot is moved
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/// Used for creating an area before the register spill area on the stack
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/// the returnaddr can be savely move to this area
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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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public:
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X86MachineFunctionInfo() : ForceFramePointer(false),
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CalleeSavedFrameSize(0),
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BytesToPopOnReturn(0),
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DecorationStyle(None),
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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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explicit X86MachineFunctionInfo(MachineFunction &MF)
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: ForceFramePointer(false),
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CalleeSavedFrameSize(0),
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BytesToPopOnReturn(0),
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DecorationStyle(None),
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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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bool getForceFramePointer() const { return ForceFramePointer;}
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void setForceFramePointer(bool forceFP) { ForceFramePointer = forceFP; }
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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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NameDecorationStyle getDecorationStyle() const { return DecorationStyle; }
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void setDecorationStyle(NameDecorationStyle style) { DecorationStyle = style;}
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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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};
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} // End llvm namespace
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#endif
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