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1//===-- DiffConsumer.h - Difference Consumer --------------------*- C++ -*-===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8//9// This header defines the interface to the LLVM difference Consumer10//11//===----------------------------------------------------------------------===//12 13#ifndef LLVM_TOOLS_LLVM_DIFF_DIFFCONSUMER_H14#define LLVM_TOOLS_LLVM_DIFF_DIFFCONSUMER_H15 16#include "DiffLog.h"17#include "llvm/ADT/DenseMap.h"18#include "llvm/ADT/SmallVector.h"19#include "llvm/IR/Value.h"20#include "llvm/Support/Casting.h"21#include "llvm/Support/raw_ostream.h"22 23namespace llvm {24class StringRef;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 and34 /// Right are IR "containers" of some sort which are being35 /// considered for structural equivalence: global variables,36 /// functions, blocks, instructions, etc.37 virtual void enterContext(const Value *Left, const 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() = default;53 };54 55 class DiffConsumer : public Consumer {56 private:57 struct DiffContext {58 DiffContext(const Value *L, const Value *R)59 : L(L), R(R), Differences(false), IsFunction(isa<Function>(L)) {}60 const Value *L;61 const Value *R;62 bool Differences;63 bool IsFunction;64 DenseMap<const Value *, unsigned> LNumbering;65 DenseMap<const Value *, unsigned> RNumbering;66 };67 68 raw_ostream &out;69 SmallVector<DiffContext, 5> contexts;70 bool Differences;71 unsigned Indent;72 73 void printValue(const Value *V, bool isL);74 void header();75 void indent();76 77 public:78 DiffConsumer()79 : out(errs()), Differences(false), Indent(0) {}80 81 void reset();82 bool hadDifferences() const;83 void enterContext(const Value *L, const Value *R) override;84 void exitContext() override;85 void log(StringRef text) override;86 void logf(const LogBuilder &Log) override;87 void logd(const DiffLogBuilder &Log) override;88 };89}90 91#endif92