84 lines
2.4 KiB
C++
84 lines
2.4 KiB
C++
//===-- DiffLog.h - Difference Log Builder and accessories ------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This header defines the interface to the LLVM difference log builder.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_TOOLS_LLVM_DIFF_DIFFLOG_H
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#define LLVM_TOOLS_LLVM_DIFF_DIFFLOG_H
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/ADT/StringRef.h"
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namespace llvm {
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class Instruction;
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class Value;
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class Consumer;
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/// Trichotomy assumption
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enum DiffChange { DC_match, DC_left, DC_right };
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/// A temporary-object class for building up log messages.
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class LogBuilder {
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Consumer *consumer;
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/// The use of a stored StringRef here is okay because
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/// LogBuilder should be used only as a temporary, and as a
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/// temporary it will be destructed before whatever temporary
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/// might be initializing this format.
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StringRef Format;
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SmallVector<const Value *, 4> Arguments;
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public:
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LogBuilder(Consumer &c, StringRef Format) : consumer(&c), Format(Format) {}
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LogBuilder(LogBuilder &&L)
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: consumer(L.consumer), Format(L.Format),
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Arguments(std::move(L.Arguments)) {
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L.consumer = nullptr;
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}
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LogBuilder &operator<<(const Value *V) {
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Arguments.push_back(V);
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return *this;
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}
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~LogBuilder();
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StringRef getFormat() const;
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unsigned getNumArguments() const;
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const Value *getArgument(unsigned I) const;
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};
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/// A temporary-object class for building up diff messages.
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class DiffLogBuilder {
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typedef std::pair<const Instruction *, const Instruction *> DiffRecord;
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SmallVector<DiffRecord, 20> Diff;
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Consumer &consumer;
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public:
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DiffLogBuilder(Consumer &c) : consumer(c) {}
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~DiffLogBuilder();
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void addMatch(const Instruction *L, const Instruction *R);
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// HACK: VS 2010 has a bug in the stdlib that requires this.
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void addLeft(const Instruction *L);
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void addRight(const Instruction *R);
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unsigned getNumLines() const;
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DiffChange getLineKind(unsigned I) const;
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const Instruction *getLeft(unsigned I) const;
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const Instruction *getRight(unsigned I) const;
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};
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}
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#endif
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