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a8ac3fca6f
argument. These are no longer allocated as they are discovered. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2320 91177308-0d34-0410-b5e6-96231b3b80d8
85 lines
3.4 KiB
C++
85 lines
3.4 KiB
C++
// $Id$ -*-c++-*-
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//***************************************************************************
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// File:
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// MachineFrameInfo.h
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//
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// Purpose:
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// Interface to layout of stack frame on target machine.
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//
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// History:
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// 11/6/01 - Vikram Adve - Created
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//**************************************************************************/
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#ifndef LLVM_CODEGEN_FRAMEINFO_H
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#define LLVM_CODEGEN_FRAMEINFO_H
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#include "Support/NonCopyable.h"
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#include <vector>
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//************************* Forward Declarations **************************/
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class MachineCodeForMethod;
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class TargetMachine;
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//*************************** External Classes ****************************/
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class MachineFrameInfo : public NonCopyableV {
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public:
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const TargetMachine& target;
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public:
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/*ctor*/ MachineFrameInfo(const TargetMachine& tgt) : target(tgt) {}
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//
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// These methods provide constant parameters of the frame layout.
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//
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virtual int getStackFrameSizeAlignment () const = 0;
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virtual int getMinStackFrameSize () const = 0;
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virtual int getNumFixedOutgoingArgs () const = 0;
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virtual int getSizeOfEachArgOnStack () const = 0;
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virtual bool argsOnStackHaveFixedSize () const = 0;
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//
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// These methods compute offsets using the frame contents for a
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// particular method. The frame contents are obtained from the
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// MachineCodeInfoForMethod object for the given method.
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// The first few methods have default machine-independent implementations.
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// The rest must be implemented by the machine-specific subclass.
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//
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virtual int getIncomingArgOffset (MachineCodeForMethod& mcInfo,
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unsigned argNum) const;
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virtual int getOutgoingArgOffset (MachineCodeForMethod& mcInfo,
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unsigned argNum) const;
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virtual int getFirstIncomingArgOffset (MachineCodeForMethod& mcInfo,
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bool& growUp) const=0;
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virtual int getFirstOutgoingArgOffset (MachineCodeForMethod& mcInfo,
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bool& growUp) const=0;
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virtual int getFirstOptionalOutgoingArgOffset (MachineCodeForMethod&,
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bool& growUp) const=0;
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virtual int getFirstAutomaticVarOffset (MachineCodeForMethod& mcInfo,
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bool& growUp) const=0;
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virtual int getRegSpillAreaOffset (MachineCodeForMethod& mcInfo,
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bool& growUp) const=0;
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virtual int getTmpAreaOffset (MachineCodeForMethod& mcInfo,
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bool& growUp) const=0;
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virtual int getDynamicAreaOffset (MachineCodeForMethod& mcInfo,
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bool& growUp) const=0;
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//
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// These methods specify the base register used for each stack area
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// (generally FP or SP)
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//
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virtual int getIncomingArgBaseRegNum() const=0;
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virtual int getOutgoingArgBaseRegNum() const=0;
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virtual int getOptionalOutgoingArgBaseRegNum() const=0;
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virtual int getAutomaticVarBaseRegNum() const=0;
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virtual int getRegSpillAreaBaseRegNum() const=0;
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virtual int getDynamicAreaBaseRegNum() const=0;
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};
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#endif
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