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//===-- 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 "llvm/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 string TargetName;
const TargetData DataLayout; // Calculates type size & alignment
int optSizeForSubWordData;
int minMemOpWordSize;
int maxAtomicMemOpWordSize;
protected:
TargetMachine(const 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, ostream &OutStr) const = 0;
};
#endif
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