<commit_before>//===-- llvm/Target/Machine.h - General Target Information -------*- C++ -*-==//
//
// This file describes the general parts of a Target machine.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_TARGET_TARGETMACHINE_H
#define LLVM_TARGET_TARGETMACHINE_H

#include "llvm/Target/TargetData.h"
#include "Support/NonCopyable.h"

class TargetMachine;
class MachineInstrInfo;
class MachineInstrDescriptor;
class MachineSchedInfo;
class MachineRegInfo;
class MachineFrameInfo;
class MachineCacheInfo;

//---------------------------------------------------------------------------
// Data types used to define information about a single machine instruction
//---------------------------------------------------------------------------

typedef int MachineOpCode;
typedef int OpCodeMask;


//---------------------------------------------------------------------------
// class TargetMachine
// 
// Purpose:
//   Primary interface to the complete machine description for the
//   target machine.  All target-specific information should be
//   accessible through this interface.
// 
//---------------------------------------------------------------------------

class TargetMachine : public NonCopyableV {
public:
  const std::string TargetName;
  const TargetData DataLayout;		// Calculates type size & alignment
  int              optSizeForSubWordData;
  int	           minMemOpWordSize;
  int	           maxAtomicMemOpWordSize;
  
protected:
  TargetMachine(const std::string &targetname, // Can only create subclasses...
		unsigned char PtrSize = 8, unsigned char PtrAl = 8,
		unsigned char DoubleAl = 8, unsigned char FloatAl = 4,
		unsigned char LongAl = 8, unsigned char IntAl = 4,
		unsigned char ShortAl = 2, unsigned char ByteAl = 1)
    : TargetName(targetname), DataLayout(targetname, PtrSize, PtrAl,
					 DoubleAl, FloatAl, LongAl, IntAl, 
					 ShortAl, ByteAl) { }
public:
  virtual ~TargetMachine() {}
  
  // 
  // Interfaces to the major aspects of target machine information:
  // -- Instruction opcode and operand information
  // -- Pipelines and scheduling information
  // -- Register information
  // 
  virtual const MachineInstrInfo&       getInstrInfo() const = 0;
  virtual const MachineSchedInfo&       getSchedInfo() const = 0;
  virtual const MachineRegInfo&	        getRegInfo()   const = 0;
  virtual const MachineFrameInfo&       getFrameInfo() const = 0;
  virtual const MachineCacheInfo&       getCacheInfo() const = 0;
  
  //
  // Data storage information
  // 
  virtual unsigned int	findOptimalStorageSize	(const Type* ty) const;
  
  //
  // compileMethod - Everything neccesary to compile a method into the
  // built in representation.  This allows the target to have complete control
  // over how it does compilation.  This does not emit assembly or output
  // machine code, however; those are done later.
  //
  virtual bool compileMethod(Method *M) = 0;

  //
  // emitAssembly - Output assembly language code (a .s file) for the specified
  // method. The specified method must have been compiled before this may be
  // used.
  //
  virtual void emitAssembly(const Module *M, std::ostream &OutStr) const = 0;
};<commit_msg>Add methods to TargetMachine to: * Output assembly code a method at a time instead of building it all up then emitting it as a whole module * Release memory contained in various annotations.<commit_after>//===-- llvm/Target/Machine.h - General Target Information -------*- C++ -*-==//
//
// This file describes the general parts of a Target machine.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_TARGET_TARGETMACHINE_H
#define LLVM_TARGET_TARGETMACHINE_H

#include "llvm/Target/TargetData.h"
#include "Support/NonCopyable.h"

class MachineInstrInfo;
class MachineInstrDescriptor;
class MachineSchedInfo;
class MachineRegInfo;
class MachineFrameInfo;
class MachineCacheInfo;
class Module;
class Method;

//---------------------------------------------------------------------------
// class TargetMachine
// 
// Purpose:
//   Primary interface to the complete machine description for the
//   target machine.  All target-specific information should be
//   accessible through this interface.
// 
//---------------------------------------------------------------------------

class TargetMachine : public NonCopyableV {
public:
  const std::string TargetName;
  const TargetData DataLayout;		// Calculates type size & alignment
  int              optSizeForSubWordData;
  int	           minMemOpWordSize;
  int	           maxAtomicMemOpWordSize;
  
protected:
  TargetMachine(const std::string &targetname, // Can only create subclasses...
		unsigned char PtrSize = 8, unsigned char PtrAl = 8,
		unsigned char DoubleAl = 8, unsigned char FloatAl = 4,
		unsigned char LongAl = 8, unsigned char IntAl = 4,
		unsigned char ShortAl = 2, unsigned char ByteAl = 1)
    : TargetName(targetname), DataLayout(targetname, PtrSize, PtrAl,
					 DoubleAl, FloatAl, LongAl, IntAl, 
					 ShortAl, ByteAl) { }
public:
  virtual ~TargetMachine() {}
  
  // 
  // Interfaces to the major aspects of target machine information:
  // -- Instruction opcode and operand information
  // -- Pipelines and scheduling information
  // -- Register information
  // 
  virtual const MachineInstrInfo&       getInstrInfo() const = 0;
  virtual const MachineSchedInfo&       getSchedInfo() const = 0;
  virtual const MachineRegInfo&	        getRegInfo()   const = 0;
  virtual const MachineFrameInfo&       getFrameInfo() const = 0;
  virtual const MachineCacheInfo&       getCacheInfo() const = 0;
  
  //
  // Data storage information
  // 
  virtual unsigned int	findOptimalStorageSize	(const Type* ty) const;
  
  //
  // compileMethod - Everything neccesary to compile a method into the
  // built in representation.  This allows the target to have complete control
  // over how it does compilation.  This does not emit assembly or output
  // machine code, however; those are done later.
  //
  virtual bool compileMethod(Method *M) = 0;

  //
  // emitAssembly - Output assembly language code (a .s file) for the specified
  // method. The specified method must have been compiled before this may be
  // used.
  //
  virtual void emitAssembly(const Method *M, std::ostream &OutStr) const = 0;

  //
  // emitAssembly - Output assembly language code (a .s file) for global
  // components of the specified module.  This assumes that methods have been
  // previously output.
  //
  virtual void emitAssembly(const Module *M, std::ostream &OutStr) const = 0;

  //
  // freeCompiledMethod - Release all memory associated with the compiled image
  // for this method.
  //
  virtual void freeCompiledMethod(Method *M) = 0;
};
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