Differential D81396 Diff 274697 clang-tools-extra/clang-tidy/utils/Aliasing.cpp

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clang-tools-extra/clang-tidy/utils/Aliasing.cpp

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				//===------------- Aliasing.cpp - clang-tidy ------------------------------===//
				//
				// 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
				//
				//===----------------------------------------------------------------------===//

				#include "Aliasing.h"

				#include "clang/AST/Expr.h"

				namespace clang {
				namespace tidy {
				namespace utils {

				/// Return whether \p S is a reference to the declaration of \p Var.
				static bool isAccessForVar(const Stmt S, const VarDecl Var) {
				njames93Unsubmitted Not Done Reply Inline Actions Ditto `\p <Name>`. njames93: Ditto `\p <Name>`.
				if (const auto *DRE = dyn_cast<DeclRefExpr>(S))
				return DRE->getDecl() == Var;

				return false;
				}

				/// Return whether \p Var has a pointer or reference in \p S.
				static bool isPtrOrReferenceForVar(const Stmt S, const VarDecl Var) {
				njames93Unsubmitted Not Done Reply Inline Actions Ditto. njames93: Ditto.
				if (const auto *DS = dyn_cast<DeclStmt>(S)) {
				for (const Decl *D : DS->getDeclGroup()) {
				if (const auto *LeftVar = dyn_cast<VarDecl>(D)) {
				if (LeftVar->hasInit() && LeftVar->getType()->isReferenceType()) {
				return isAccessForVar(LeftVar->getInit(), Var);
				}
				}
				}
				} else if (const auto *UnOp = dyn_cast<UnaryOperator>(S)) {
				if (UnOp->getOpcode() == UO_AddrOf)
				return isAccessForVar(UnOp->getSubExpr(), Var);
				}

				return false;
				}

				/// Return whether \p Var has a pointer or reference in \p S.
				static bool hasPtrOrReferenceInStmt(const Stmt S, const VarDecl Var) {
				njames93Unsubmitted Not Done Reply Inline Actions Ditto. njames93: Ditto.
				if (isPtrOrReferenceForVar(S, Var))
				return true;

				for (const Stmt *Child : S->children()) {
				if (!Child)
				continue;

				if (hasPtrOrReferenceInStmt(Child, Var))
				return true;
				}

				return false;
				}

				bool hasPtrOrReferenceInFunc(const FunctionDecl Func, const VarDecl Var) {
				return hasPtrOrReferenceInStmt(Func->getBody(), Var);
				gribozavr2Unsubmitted Not Done Reply Inline Actions Please don't duplicate the comment from the header in the cpp file. gribozavr2: Please don't duplicate the comment from the header in the cpp file.
				}

				} // namespace utils
				} // namespace tidy
				} // namespace clang