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