6024e5c395
clang 20.0.0 (based on r547379) from build 12806354. Bug: http://b/379133546 Test: N/A Change-Id: I2eb8938af55d809de674be63cb30cf27e801862b Upstream-Commit: ad834e67b1105d15ef907f6255d4c96e8e733f57
63 lines
2.4 KiB
C++
63 lines
2.4 KiB
C++
//===-- Transfer.h ----------------------------------------------*- 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 file defines a transfer function that evaluates a program statement and
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// updates an environment accordingly.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CLANG_ANALYSIS_FLOWSENSITIVE_TRANSFER_H
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#define LLVM_CLANG_ANALYSIS_FLOWSENSITIVE_TRANSFER_H
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#include "clang/AST/Stmt.h"
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#include "clang/Analysis/FlowSensitive/DataflowAnalysisContext.h"
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#include "clang/Analysis/FlowSensitive/DataflowEnvironment.h"
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#include "clang/Analysis/FlowSensitive/TypeErasedDataflowAnalysis.h"
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namespace clang {
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namespace dataflow {
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/// Maps statements to the environments of basic blocks that contain them.
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class StmtToEnvMap {
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public:
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// `CurBlockID` is the ID of the block currently being processed, and
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// `CurState` is the pending state currently associated with this block. These
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// are supplied separately as the pending state for the current block may not
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// yet be represented in `BlockToState`.
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StmtToEnvMap(const AdornedCFG &ACFG,
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llvm::ArrayRef<std::optional<TypeErasedDataflowAnalysisState>>
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BlockToState,
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unsigned CurBlockID,
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const TypeErasedDataflowAnalysisState &CurState)
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: ACFG(ACFG), BlockToState(BlockToState), CurBlockID(CurBlockID),
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CurState(CurState) {}
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/// Returns the environment of the basic block that contains `S`.
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/// The result is guaranteed never to be null.
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const Environment *getEnvironment(const Stmt &S) const;
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private:
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const AdornedCFG &ACFG;
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llvm::ArrayRef<std::optional<TypeErasedDataflowAnalysisState>> BlockToState;
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unsigned CurBlockID;
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const TypeErasedDataflowAnalysisState &CurState;
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};
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/// Evaluates `S` and updates `Env` accordingly.
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///
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/// Requirements:
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///
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/// `S` must not be `ParenExpr` or `ExprWithCleanups`.
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void transfer(const StmtToEnvMap &StmtToEnv, const Stmt &S, Environment &Env,
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Environment::ValueModel &Model);
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} // namespace dataflow
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} // namespace clang
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#endif // LLVM_CLANG_ANALYSIS_FLOWSENSITIVE_TRANSFER_H
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