1 //===-- DiffConsumer.h - Difference Consumer --------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This header defines the interface to the LLVM difference Consumer
12 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_TOOLS_LLVM_DIFF_DIFFCONSUMER_H
15 #define LLVM_TOOLS_LLVM_DIFF_DIFFCONSUMER_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"
29 /// The interface for consumers of difference data.
31 virtual void anchor();
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;
39 /// Record that a local context has been exited.
40 virtual void exitContext() = 0;
42 /// Record a difference within the current context.
43 virtual void log(StringRef Text) = 0;
45 /// Record a formatted difference within the current context.
46 virtual void logf(const LogBuilder &Log) = 0;
48 /// Record a line-by-line instruction diff.
49 virtual void logd(const DiffLogBuilder &Log) = 0;
52 virtual ~Consumer() {}
55 class DiffConsumer : public Consumer {
58 DiffContext(Value *L, Value *R)
59 : L(L), R(R), Differences(false), IsFunction(isa<Function>(L)) {}
64 DenseMap<Value*,unsigned> LNumbering;
65 DenseMap<Value*,unsigned> RNumbering;
69 SmallVector<DiffContext, 5> contexts;
73 void printValue(Value *V, bool isL);
79 : out(errs()), Differences(false), Indent(0) {}
81 bool hadDifferences() const;
82 void enterContext(Value *L, Value *R) override;
83 void exitContext() override;
84 void log(StringRef text) override;
85 void logf(const LogBuilder &Log) override;
86 void logd(const DiffLogBuilder &Log) override;