LLVM API Documentation

AlphaJITInfo.h

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00001 //===- AlphaJITInfo.h - Alpha impl. of the JIT interface ----*- C++ -*-===//
00002 //
00003 //                     The LLVM Compiler Infrastructure
00004 //
00005 // This file was developed by the LLVM research group and is distributed under
00006 // the University of Illinois Open Source License. See LICENSE.TXT for details.
00007 //
00008 //===----------------------------------------------------------------------===//
00009 //
00010 // This file contains the Alpha implementation of the TargetJITInfo class.
00011 //
00012 //===----------------------------------------------------------------------===//
00013 
00014 #ifndef ALPHA_JITINFO_H
00015 #define ALPHA_JITINFO_H
00016 
00017 #include "llvm/Target/TargetJITInfo.h"
00018 #include "llvm/GlobalValue.h"
00019 #include <string>
00020 #include <map>
00021 
00022 namespace llvm {
00023   class TargetMachine;
00024 
00025   class AlphaJITInfo : public TargetJITInfo {
00026   protected:
00027     TargetMachine &TM;
00028   public:
00029     AlphaJITInfo(TargetMachine &tm) : TM(tm)
00030     { useGOT = true; }
00031 
00032     /// addPassesToJITCompile - Add passes to the specified pass manager to
00033     /// implement a fast dynamic compiler for this target.  Return true if this
00034     /// is not supported for this target.
00035     ///
00036     virtual void addPassesToJITCompile(FunctionPassManager &PM);
00037 
00038     virtual void *emitFunctionStub(void *Fn, MachineCodeEmitter &MCE);
00039     virtual LazyResolverFn getLazyResolverFunction(JITCompilerFn);
00040     virtual void relocate(void *Function, MachineRelocation *MR,
00041                           unsigned NumRelocs, unsigned char* GOTBase);
00042 
00043     /// replaceMachineCodeForFunction - Make it so that calling the function
00044     /// whose machine code is at OLD turns into a call to NEW, perhaps by
00045     /// overwriting OLD with a branch to NEW.  This is used for self-modifying
00046     /// code.
00047     ///
00048     virtual void replaceMachineCodeForFunction(void *Old, void *New);
00049 
00050   private:
00051     static const unsigned GOToffset = 4096;
00052 
00053   };
00054 }
00055 
00056 #endif