[clang] [libcxx] [llvm] [flang] [libc] [openmp] [clang-tools-extra] [compiler-rt] [clang-tidy] Add bugprone-move-shared-pointer-contents check. (PR #67467)

[Piotr Zegar via cfe-commits]

================
@@ -0,0 +1,49 @@
+//===--- MoveSharedPointerContentsCheck.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 "MoveSharedPointerContentsCheck.h"
+#include "../ClangTidyCheck.h"
+#include "../utils/Matchers.h"
+#include "../utils/OptionsUtils.h"
+#include "clang/AST/ASTContext.h"
+#include "clang/ASTMatchers/ASTMatchFinder.h"
+
+using namespace clang::ast_matchers;
+
+namespace clang::tidy::bugprone {
+
+MoveSharedPointerContentsCheck::MoveSharedPointerContentsCheck(
+    StringRef Name, ClangTidyContext *Context)
+    : ClangTidyCheck(Name, Context),
+      SharedPointerClasses(utils::options::parseStringList(
+          Options.get("SharedPointerClasses", "::std::shared_ptr"))) {}
+
+void MoveSharedPointerContentsCheck::registerMatchers(MatchFinder *Finder) {
+  Finder->addMatcher(
+      callExpr(anyOf(callee(functionDecl(hasName("::std::move"))),
+                     callee(unresolvedLookupExpr(hasAnyDeclaration(namedDecl(
+                         hasUnderlyingDecl(hasName("::std::move"))))))),
+               hasArgument(0, anyOf(cxxOperatorCallExpr(
+                                        hasOverloadedOperatorName("*"),
+                                        callee(cxxMethodDecl(ofClass(
+                                            matchers::matchesAnyListedName(
+                                                SharedPointerClasses))))),
+                                    unaryOperator(hasOperatorName("*")))))
----------------
PiotrZSL wrote:

unaryOperator is too wide, it will catch things like:
```
A *a;
std::move(*a);
```

and there is no shared_ptr.

https://github.com/llvm/llvm-project/pull/67467