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https://github.com/c64scene-ar/llvm-6502.git
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478df7a7ae
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4436 91177308-0d34-0410-b5e6-96231b3b80d8
97 lines
3.4 KiB
C++
97 lines
3.4 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 "Support/NonCopyable.h"
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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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class MachineFrameInfo;
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class MachineCacheInfo;
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class MachineOptInfo;
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class MRegisterInfo;
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class PassManager;
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class Pass;
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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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const std::string Name;
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public:
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const TargetData DataLayout; // Calculates type size & alignment
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protected:
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TargetMachine(const std::string &name, // Can only create subclasses...
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unsigned char SubWordSize = 1, unsigned char IntRegSize = 8,
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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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: Name(name), DataLayout(name, SubWordSize, IntRegSize, PtrSize, PtrAl,
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DoubleAl, FloatAl, LongAl,
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IntAl, ShortAl, ByteAl) {}
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public:
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virtual ~TargetMachine() {}
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const std::string &getName() const { return Name; }
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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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// -- Stack frame information
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// -- Cache hierarchy information
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// -- Machine-level optimization information (peephole only)
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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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virtual const MachineFrameInfo& getFrameInfo() const = 0;
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virtual const MachineCacheInfo& getCacheInfo() const = 0;
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virtual const MachineOptInfo& getOptInfo() const = 0;
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/// getRegisterInfo - If register information is available, return it. If
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/// not, return null. This is kept seperate from RegInfo until RegInfo gets
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/// straightened out.
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///
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virtual const MRegisterInfo* getRegisterInfo() const { return 0; }
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// Data storage information
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//
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virtual unsigned findOptimalStorageSize(const Type* ty) const;
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/// addPassesToEmitAssembly - Add passes to the specified pass manager to get
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/// assembly langage code emited. Typically this will involve several steps
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/// of code generation. This method should return true if code generation is
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/// not supported.
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///
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virtual bool addPassesToEmitAssembly(PassManager &PM, std::ostream &Out) {
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return true;
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}
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/// addPassesToJITCompile - Add passes to the specified pass manager to
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/// implement a fast dynamic compiler for this target. Return true if this is
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/// not supported for this target.
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///
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virtual bool addPassesToJITCompile(PassManager &PM) { return true; }
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};
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#endif
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