Renato Golin | 7d4fc4f | 2011-03-14 22:22:46 +0000 | [diff] [blame] | 1 | //===-- DiffLog.h - Difference Log Builder and accessories ------*- 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 log builder. |
| 11 | // |
| 12 | //===----------------------------------------------------------------------===// |
| 13 | |
| 14 | #ifndef _LLVM_DIFFLOG_H_ |
| 15 | #define _LLVM_DIFFLOG_H_ |
| 16 | |
| 17 | #include "llvm/ADT/SmallVector.h" |
| 18 | #include "llvm/ADT/StringRef.h" |
| 19 | |
| 20 | namespace llvm { |
| 21 | class Instruction; |
| 22 | class Value; |
| 23 | class Consumer; |
| 24 | |
| 25 | /// Trichotomy assumption |
| 26 | enum DiffChange { DC_match, DC_left, DC_right }; |
| 27 | |
| 28 | /// A temporary-object class for building up log messages. |
| 29 | class LogBuilder { |
| 30 | Consumer &consumer; |
| 31 | |
| 32 | /// The use of a stored StringRef here is okay because |
| 33 | /// LogBuilder should be used only as a temporary, and as a |
| 34 | /// temporary it will be destructed before whatever temporary |
| 35 | /// might be initializing this format. |
| 36 | StringRef Format; |
| 37 | |
| 38 | SmallVector<Value*, 4> Arguments; |
| 39 | |
| 40 | public: |
| 41 | LogBuilder(Consumer &c, StringRef Format) |
| 42 | : consumer(c), Format(Format) {} |
| 43 | |
| 44 | LogBuilder &operator<<(Value *V) { |
| 45 | Arguments.push_back(V); |
| 46 | return *this; |
| 47 | } |
| 48 | |
| 49 | ~LogBuilder(); |
| 50 | |
| 51 | StringRef getFormat() const; |
| 52 | unsigned getNumArguments() const; |
| 53 | Value *getArgument(unsigned I) const; |
| 54 | }; |
| 55 | |
| 56 | /// A temporary-object class for building up diff messages. |
| 57 | class DiffLogBuilder { |
| 58 | typedef std::pair<Instruction*,Instruction*> DiffRecord; |
| 59 | SmallVector<DiffRecord, 20> Diff; |
| 60 | |
| 61 | Consumer &consumer; |
| 62 | |
| 63 | public: |
| 64 | DiffLogBuilder(Consumer &c) : consumer(c) {} |
| 65 | ~DiffLogBuilder(); |
| 66 | |
| 67 | void addMatch(Instruction *L, Instruction *R); |
| 68 | // HACK: VS 2010 has a bug in the stdlib that requires this. |
| 69 | void addLeft(Instruction *L); |
| 70 | void addRight(Instruction *R); |
| 71 | |
| 72 | unsigned getNumLines() const; |
| 73 | DiffChange getLineKind(unsigned I) const; |
| 74 | Instruction *getLeft(unsigned I) const; |
| 75 | Instruction *getRight(unsigned I) const; |
| 76 | }; |
| 77 | |
| 78 | } |
| 79 | |
| 80 | #endif |