1 //===-- DiffConsumer.h - Difference Consumer --------------------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This header defines the interface to the LLVM difference Consumer 11 // 12 //===----------------------------------------------------------------------===// 13 14 #ifndef _LLVM_DIFFCONSUMER_H_ 15 #define _LLVM_DIFFCONSUMER_H_ 16 17 #include "DiffLog.h" 18 19 #include "llvm/ADT/SmallVector.h" 20 #include "llvm/ADT/DenseMap.h" 21 #include "llvm/ADT/StringRef.h" 22 #include "llvm/Support/raw_ostream.h" 23 #include "llvm/Support/Casting.h" 24 25 namespace llvm { 26 class Module; 27 class Value; 28 class Function; 29 30 /// The interface for consumers of difference data. 31 class Consumer { 32 virtual void anchor(); 33 public: 34 /// Record that a local context has been entered. Left and 35 /// Right are IR "containers" of some sort which are being 36 /// considered for structural equivalence: global variables, 37 /// functions, blocks, instructions, etc. 38 virtual void enterContext(Value *Left, Value *Right) = 0; 39 40 /// Record that a local context has been exited. 41 virtual void exitContext() = 0; 42 43 /// Record a difference within the current context. 44 virtual void log(StringRef Text) = 0; 45 46 /// Record a formatted difference within the current context. 47 virtual void logf(const LogBuilder &Log) = 0; 48 49 /// Record a line-by-line instruction diff. 50 virtual void logd(const DiffLogBuilder &Log) = 0; 51 52 protected: 53 virtual ~Consumer() {} 54 }; 55 56 class DiffConsumer : public Consumer { 57 private: 58 struct DiffContext { 59 DiffContext(Value *L, Value *R) 60 : L(L), R(R), Differences(false), IsFunction(isa<Function>(L)) {} 61 Value *L; 62 Value *R; 63 bool Differences; 64 bool IsFunction; 65 DenseMap<Value*,unsigned> LNumbering; 66 DenseMap<Value*,unsigned> RNumbering; 67 }; 68 69 raw_ostream &out; 70 Module *LModule; 71 Module *RModule; 72 SmallVector<DiffContext, 5> contexts; 73 bool Differences; 74 unsigned Indent; 75 76 void printValue(Value *V, bool isL); 77 void header(); 78 void indent(); 79 80 public: 81 DiffConsumer(Module *L, Module *R) 82 : out(errs()), LModule(L), RModule(R), Differences(false), Indent(0) {} 83 84 bool hadDifferences() const; 85 void enterContext(Value *L, Value *R); 86 void exitContext(); 87 void log(StringRef text); 88 void logf(const LogBuilder &Log); 89 void logd(const DiffLogBuilder &Log); 90 }; 91 } 92 93 #endif 94
