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authorrobot-piglet <robot-piglet@yandex-team.com>2025-03-05 13:38:11 +0300
committerrobot-piglet <robot-piglet@yandex-team.com>2025-03-05 13:49:53 +0300
commit9eed360f02de773a5ed2de5d2a3e81fc7f06acfa (patch)
tree744a4054e64eb443073c7c6ad36b29cedcf9c2e6 /contrib/libs/llvm14/tools/llvm-diff/lib/DifferenceEngine.h
parentc141a5c40bda2eed1a68b0626ffdae5fd19359a6 (diff)
downloadydb-9eed360f02de773a5ed2de5d2a3e81fc7f06acfa.tar.gz
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commit_hash:2ec2671384dd8e604d41bc5c52c2f7858e4afea6
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-//===-- DifferenceEngine.h - Module comparator ------------------*- 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 engine,
-// which structurally compares functions within a module.
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef LLVM_TOOLS_LLVM_DIFF_DIFFERENCEENGINE_H
-#define LLVM_TOOLS_LLVM_DIFF_DIFFERENCEENGINE_H
-
-#include "DiffConsumer.h"
-#include "DiffLog.h"
-#include "llvm/ADT/StringRef.h"
-#include <utility>
-
-namespace llvm {
- class Function;
- class GlobalValue;
- class Instruction;
- class LLVMContext;
- class Module;
- class Twine;
- class Value;
-
- /// A class for performing structural comparisons of LLVM assembly.
- class DifferenceEngine {
- public:
- /// A RAII object for recording the current context.
- struct Context {
- Context(DifferenceEngine &Engine, const Value *L, const Value *R)
- : Engine(Engine) {
- Engine.consumer.enterContext(L, R);
- }
-
- ~Context() {
- Engine.consumer.exitContext();
- }
-
- private:
- DifferenceEngine &Engine;
- };
-
- /// An oracle for answering whether two values are equivalent as
- /// operands.
- class Oracle {
- virtual void anchor();
- public:
- virtual bool operator()(const Value *L, const Value *R) = 0;
-
- protected:
- virtual ~Oracle() {}
- };
-
- DifferenceEngine(Consumer &consumer)
- : consumer(consumer), globalValueOracle(nullptr) {}
-
- void diff(const Module *L, const Module *R);
- void diff(const Function *L, const Function *R);
- void log(StringRef text) {
- consumer.log(text);
- }
- LogBuilder logf(StringRef text) {
- return LogBuilder(consumer, text);
- }
- Consumer& getConsumer() const { return consumer; }
-
- /// Installs an oracle to decide whether two global values are
- /// equivalent as operands. Without an oracle, global values are
- /// considered equivalent as operands precisely when they have the
- /// same name.
- void setGlobalValueOracle(Oracle *oracle) {
- globalValueOracle = oracle;
- }
-
- /// Determines whether two global values are equivalent.
- bool equivalentAsOperands(const GlobalValue *L, const GlobalValue *R);
-
- private:
- Consumer &consumer;
- Oracle *globalValueOracle;
- };
-}
-
-#endif