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#pragma once
#ifdef __GNUC__
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wunused-parameter"
#endif
//===-- ControlFlowContext.h ------------------------------------*- 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 file defines a ControlFlowContext class that is used by dataflow
// analyses that run over Control-Flow Graphs (CFGs).
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_ANALYSIS_FLOWSENSITIVE_CONTROLFLOWCONTEXT_H
#define LLVM_CLANG_ANALYSIS_FLOWSENSITIVE_CONTROLFLOWCONTEXT_H
#include "clang/AST/ASTContext.h"
#include "clang/AST/Decl.h"
#include "clang/AST/Stmt.h"
#include "clang/Analysis/CFG.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/Support/Error.h"
#include <memory>
#include <utility>
namespace clang {
namespace dataflow {
/// Holds CFG and other derived context that is needed to perform dataflow
/// analysis.
class ControlFlowContext {
public:
/// Builds a ControlFlowContext from an AST node. `D` is the function in which
/// `S` resides and must not be null.
static llvm::Expected<ControlFlowContext> build(const Decl *D, Stmt &S,
ASTContext &C);
/// Returns the `Decl` containing the statement used to construct the CFG, if
/// available.
const Decl *getDecl() const { return ContainingDecl; }
/// Returns the CFG that is stored in this context.
const CFG &getCFG() const { return *Cfg; }
/// Returns a mapping from statements to basic blocks that contain them.
const llvm::DenseMap<const Stmt *, const CFGBlock *> &getStmtToBlock() const {
return StmtToBlock;
}
private:
// FIXME: Once the deprecated `build` method is removed, mark `D` as "must not
// be null" and add an assertion.
ControlFlowContext(const Decl *D, std::unique_ptr<CFG> Cfg,
llvm::DenseMap<const Stmt *, const CFGBlock *> StmtToBlock)
: ContainingDecl(D), Cfg(std::move(Cfg)),
StmtToBlock(std::move(StmtToBlock)) {}
/// The `Decl` containing the statement used to construct the CFG.
const Decl *ContainingDecl;
std::unique_ptr<CFG> Cfg;
llvm::DenseMap<const Stmt *, const CFGBlock *> StmtToBlock;
};
} // namespace dataflow
} // namespace clang
#endif // LLVM_CLANG_ANALYSIS_FLOWSENSITIVE_CONTROLFLOWCONTEXT_H
#ifdef __GNUC__
#pragma GCC diagnostic pop
#endif
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