LLVM API Documentation

CachedWriter.h

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00001 //===-- llvm/Assembly/CachedWriter.h - Printer Accellerator -----*- 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 defines a 'CachedWriter' class that is used to accelerate printing
00011 // chunks of LLVM.  This is used when a module is not being changed, but random
00012 // parts of it need to be printed.  This can greatly speed up printing of LLVM
00013 // output.
00014 //
00015 //===----------------------------------------------------------------------===//
00016 
00017 #ifndef LLVM_ASSEMBLY_CACHEDWRITER_H
00018 #define LLVM_ASSEMBLY_CACHEDWRITER_H
00019 
00020 #include "llvm/Value.h"
00021 #include <iostream>
00022 
00023 namespace llvm {
00024 
00025 class Module;
00026 class PointerType;
00027 class AssemblyWriter;  // Internal private class
00028 class SlotMachine;
00029 
00030 class CachedWriter {
00031   AssemblyWriter *AW;
00032   SlotMachine *SC;
00033   bool SymbolicTypes;
00034   std::ostream &Out;
00035 
00036 public:
00037   enum TypeWriter {
00038     SymTypeOn,
00039     SymTypeOff
00040   };
00041 
00042   CachedWriter(std::ostream &O = std::cout)
00043     : AW(0), SC(0), SymbolicTypes(false), Out(O) { }
00044   CachedWriter(const Module *M, std::ostream &O = std::cout)
00045     : AW(0), SC(0), SymbolicTypes(false), Out(O) {
00046     setModule(M);
00047   }
00048   ~CachedWriter();
00049 
00050   // setModule - Invalidate internal state, use the new module instead.
00051   void setModule(const Module *M);
00052 
00053   CachedWriter &operator<<(const Value &V);
00054 
00055   CachedWriter &operator<<(const Type &X);
00056 
00057   inline CachedWriter &operator<<(std::ostream &(&Manip)(std::ostream &)) {
00058     Out << Manip; return *this;
00059   }
00060 
00061   inline CachedWriter& operator<<(const char *X) {
00062     Out << X;
00063     return *this;
00064   }
00065 
00066   inline CachedWriter &operator<<(enum TypeWriter tw) {
00067     SymbolicTypes = (tw == SymTypeOn);
00068     return *this;
00069   }
00070 };
00071 
00072 } // End llvm namespace
00073 
00074 #endif