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