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89 lines
2.9 KiB
C++
89 lines
2.9 KiB
C++
//===-- llvm/Target/Machine.h - General Target Information -------*- C++ -*-==//
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//
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// This file describes the general parts of a Target machine.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_TARGET_TARGETMACHINE_H
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#define LLVM_TARGET_TARGETMACHINE_H
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#include "llvm/Target/TargetData.h"
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#include "llvm/Support/NonCopyable.h"
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class TargetMachine;
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class MachineInstrInfo;
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class MachineInstrDescriptor;
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class MachineSchedInfo;
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class MachineRegInfo;
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//---------------------------------------------------------------------------
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// Data types used to define information about a single machine instruction
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//---------------------------------------------------------------------------
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typedef int MachineOpCode;
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typedef int OpCodeMask;
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//---------------------------------------------------------------------------
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// class TargetMachine
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//
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// Purpose:
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// Primary interface to the complete machine description for the
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// target machine. All target-specific information should be
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// accessible through this interface.
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//
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//---------------------------------------------------------------------------
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class TargetMachine : public NonCopyableV {
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public:
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const string TargetName;
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const TargetData DataLayout; // Calculates type size & alignment
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int optSizeForSubWordData;
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int minMemOpWordSize;
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int maxAtomicMemOpWordSize;
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protected:
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TargetMachine(const string &targetname, // Can only create subclasses...
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unsigned char PtrSize = 8, unsigned char PtrAl = 8,
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unsigned char DoubleAl = 8, unsigned char FloatAl = 4,
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unsigned char LongAl = 8, unsigned char IntAl = 4,
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unsigned char ShortAl = 2, unsigned char ByteAl = 1)
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: TargetName(targetname), DataLayout(targetname, PtrSize, PtrAl,
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DoubleAl, FloatAl, LongAl, IntAl,
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ShortAl, ByteAl) { }
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public:
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virtual ~TargetMachine() {}
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//
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// Interfaces to the major aspects of target machine information:
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// -- Instruction opcode and operand information
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// -- Pipelines and scheduling information
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// -- Register information
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//
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virtual const MachineInstrInfo& getInstrInfo() const = 0;
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virtual const MachineSchedInfo& getSchedInfo() const = 0;
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virtual const MachineRegInfo& getRegInfo() const = 0;
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//
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// Data storage information
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//
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virtual unsigned int findOptimalStorageSize (const Type* ty) const;
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//
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// compileMethod - Everything neccesary to compile a method into the
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// built in representation. This allows the target to have complete control
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// over how it does compilation. This does not emit assembly or output
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// machine code, however; those are done later.
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//
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virtual bool compileMethod(Method *M) = 0;
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//
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// emitAssembly - Output assembly language code (a .s file) for the specified
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// method. The specified method must have been compiled before this may be
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// used.
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//
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virtual void emitAssembly(const Module *M, ostream &OutStr) const = 0;
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};
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#endif
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