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//===-- DiffConsumer.h - Difference Consumer --------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This header defines the interface to the LLVM difference Consumer
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_TOOLS_LLVM_DIFF_DIFFCONSUMER_H
#define LLVM_TOOLS_LLVM_DIFF_DIFFCONSUMER_H
#include "DiffLog.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/IR/Value.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/raw_ostream.h"
namespace llvm {
class StringRef;
class Module;
class Value;
class Function;
/// The interface for consumers of difference data.
class Consumer {
virtual void anchor();
public:
/// Record that a local context has been entered. Left and
/// Right are IR "containers" of some sort which are being
/// considered for structural equivalence: global variables,
/// functions, blocks, instructions, etc.
virtual void enterContext(const Value *Left, const Value *Right) = 0;
/// Record that a local context has been exited.
virtual void exitContext() = 0;
/// Record a difference within the current context.
virtual void log(StringRef Text) = 0;
/// Record a formatted difference within the current context.
virtual void logf(const LogBuilder &Log) = 0;
/// Record a line-by-line instruction diff.
virtual void logd(const DiffLogBuilder &Log) = 0;
protected:
virtual ~Consumer() {}
};
class DiffConsumer : public Consumer {
private:
struct DiffContext {
DiffContext(const Value *L, const Value *R)
: L(L), R(R), Differences(false), IsFunction(isa<Function>(L)) {}
const Value *L;
const Value *R;
bool Differences;
bool IsFunction;
DenseMap<const Value *, unsigned> LNumbering;
DenseMap<const Value *, unsigned> RNumbering;
};
raw_ostream &out;
SmallVector<DiffContext, 5> contexts;
bool Differences;
unsigned Indent;
void printValue(const Value *V, bool isL);
void header();
void indent();
public:
DiffConsumer()
: out(errs()), Differences(false), Indent(0) {}
void reset();
bool hadDifferences() const;
void enterContext(const Value *L, const Value *R) override;
void exitContext() override;
void log(StringRef text) override;
void logf(const LogBuilder &Log) override;
void logd(const DiffLogBuilder &Log) override;
};
}
#endif
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