llvm-6502/lib/Target/Mips/MipsJITInfo.h

//===- MipsJITInfo.h - Mips Implementation of the JIT Interface -*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains the declaration of the MipsJITInfo class.
//
//===----------------------------------------------------------------------===//

#ifndef MIPSJITINFO_H
#define MIPSJITINFO_H

#include "MipsMachineFunction.h"
#include "llvm/CodeGen/MachineConstantPool.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineJumpTableInfo.h"
#include "llvm/Target/TargetJITInfo.h"

namespace llvm {
class MipsTargetMachine;

class MipsJITInfo : public TargetJITInfo {

  bool IsPIC;
  bool IsLittleEndian;

  public:
    explicit MipsJITInfo() :
      IsPIC(false), IsLittleEndian(true) {}

    /// replaceMachineCodeForFunction - Make it so that calling the function
    /// whose machine code is at OLD turns into a call to NEW, perhaps by
    /// overwriting OLD with a branch to NEW.  This is used for self-modifying
    /// code.
    ///
    void replaceMachineCodeForFunction(void *Old, void *New) override;

    // getStubLayout - Returns the size and alignment of the largest call stub
    // on Mips.
    StubLayout getStubLayout() override;

    /// emitFunctionStub - Use the specified JITCodeEmitter object to emit a
    /// small native function that simply calls the function at the specified
    /// address.
    void *emitFunctionStub(const Function *F, void *Fn,
                           JITCodeEmitter &JCE) override;

    /// getLazyResolverFunction - Expose the lazy resolver to the JIT.
    LazyResolverFn getLazyResolverFunction(JITCompilerFn) override;

    /// relocate - Before the JIT can run a block of code that has been emitted,
    /// it must rewrite the code to contain the actual addresses of any
    /// referenced global symbols.
    void relocate(void *Function, MachineRelocation *MR,
                  unsigned NumRelocs, unsigned char *GOTBase) override;

    /// Initialize - Initialize internal stage for the function being JITted.
    void Initialize(const MachineFunction &MF, bool isPIC,
                    bool isLittleEndian) {
      IsPIC = isPIC;
      IsLittleEndian = isLittleEndian;
    }

};
}

#endif