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

[via llvm-commits]

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

>From 6d5d35e1273f595e8a0382053d5183cbce7a9d8a Mon Sep 17 00:00:00 2001
From: David Pizzuto <pizzud at google.com>
Date: Tue, 26 Sep 2023 10:45:42 -0700
Subject: [PATCH 1/6] [clang-tidy] Add bugprone-move-shared-pointer-contents
 check.

This check detects moves of the contents of a shared pointer rather than the
pointer itself. Other code with a reference to the shared pointer is probably
not expecting the move.

The set of shared pointer classes is configurable via options to allow individual
projects to cover additional types.
---
 .../bugprone/BugproneTidyModule.cpp           |  3 +
 .../clang-tidy/bugprone/CMakeLists.txt        |  2 +
 .../MoveSharedPointerContentsCheck.cpp        | 60 ++++++++++++++++
 .../bugprone/MoveSharedPointerContentsCheck.h | 37 ++++++++++
 clang-tools-extra/docs/ReleaseNotes.rst       |  6 ++
 .../bugprone/move-shared-pointer-contents.rst | 17 +++++
 .../docs/clang-tidy/checks/list.rst           |  2 +
 .../bugprone/move-shared-pointer-contents.cpp | 68 +++++++++++++++++++
 8 files changed, 195 insertions(+)
 create mode 100644 clang-tools-extra/clang-tidy/bugprone/MoveSharedPointerContentsCheck.cpp
 create mode 100644 clang-tools-extra/clang-tidy/bugprone/MoveSharedPointerContentsCheck.h
 create mode 100644 clang-tools-extra/docs/clang-tidy/checks/bugprone/move-shared-pointer-contents.rst
 create mode 100644 clang-tools-extra/test/clang-tidy/checkers/bugprone/move-shared-pointer-contents.cpp

diff --git a/clang-tools-extra/clang-tidy/bugprone/BugproneTidyModule.cpp b/clang-tools-extra/clang-tidy/bugprone/BugproneTidyModule.cpp
index a67a91eedd1048..7f4a504f9930f1 100644
--- a/clang-tools-extra/clang-tidy/bugprone/BugproneTidyModule.cpp
+++ b/clang-tools-extra/clang-tidy/bugprone/BugproneTidyModule.cpp
@@ -39,6 +39,7 @@
 #include "MisplacedPointerArithmeticInAllocCheck.h"
 #include "MisplacedWideningCastCheck.h"
 #include "MoveForwardingReferenceCheck.h"
+#include "MoveSharedPointerContentsCheck.h"
 #include "MultiLevelImplicitPointerConversionCheck.h"
 #include "MultipleNewInOneExpressionCheck.h"
 #include "MultipleStatementMacroCheck.h"
@@ -125,6 +126,8 @@ class BugproneModule : public ClangTidyModule {
         "bugprone-inaccurate-erase");
     CheckFactories.registerCheck<IncorrectEnableIfCheck>(
         "bugprone-incorrect-enable-if");
+    CheckFactories.registerCheck<MoveSharedPointerContentsCheck>(
+        "bugprone-move-shared-pointer-contents");
     CheckFactories.registerCheck<SwitchMissingDefaultCaseCheck>(
         "bugprone-switch-missing-default-case");
     CheckFactories.registerCheck<IncDecInConditionsCheck>(
diff --git a/clang-tools-extra/clang-tidy/bugprone/CMakeLists.txt b/clang-tools-extra/clang-tidy/bugprone/CMakeLists.txt
index 3c768021feb150..c017f0c0cc5202 100644
--- a/clang-tools-extra/clang-tidy/bugprone/CMakeLists.txt
+++ b/clang-tools-extra/clang-tidy/bugprone/CMakeLists.txt
@@ -23,6 +23,7 @@ add_clang_library(clangTidyBugproneModule
   ImplicitWideningOfMultiplicationResultCheck.cpp
   InaccurateEraseCheck.cpp
   IncorrectEnableIfCheck.cpp
+  MoveSharedPointerContentsCheck.cpp
   SwitchMissingDefaultCaseCheck.cpp
   IncDecInConditionsCheck.cpp
   IncorrectRoundingsCheck.cpp
@@ -35,6 +36,7 @@ add_clang_library(clangTidyBugproneModule
   MisplacedPointerArithmeticInAllocCheck.cpp
   MisplacedWideningCastCheck.cpp
   MoveForwardingReferenceCheck.cpp
+  MoveSharedPointerContentsCheck.cpp
   MultiLevelImplicitPointerConversionCheck.cpp
   MultipleNewInOneExpressionCheck.cpp
   MultipleStatementMacroCheck.cpp
diff --git a/clang-tools-extra/clang-tidy/bugprone/MoveSharedPointerContentsCheck.cpp b/clang-tools-extra/clang-tidy/bugprone/MoveSharedPointerContentsCheck.cpp
new file mode 100644
index 00000000000000..b4a393b7f2f200
--- /dev/null
+++ b/clang-tools-extra/clang-tidy/bugprone/MoveSharedPointerContentsCheck.cpp
@@ -0,0 +1,60 @@
+//===--- 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"))) {}
+
+MoveSharedPointerContentsCheck::~MoveSharedPointerContentsCheck() = default;
+
+bool MoveSharedPointerContentsCheck::isLanguageVersionSupported(
+    const LangOptions &LangOptions) const {
+  return LangOptions.CPlusPlus11;
+}
+
+void MoveSharedPointerContentsCheck::registerMatchers(MatchFinder *Finder) {
+  Finder->addMatcher(
+      callExpr(
+          callee(functionDecl(hasName("std::move"))),
+          hasArgument(0, cxxOperatorCallExpr(hasOverloadedOperatorName("*"),
+                                             callee(cxxMethodDecl(ofClass(
+                                                 matchers::matchesAnyListedName(
+                                                     SharedPointerClasses)))))
+                             .bind("op")))
+          .bind("call"),
+      this);
+}
+
+void MoveSharedPointerContentsCheck::check(
+    const MatchFinder::MatchResult &Result) {
+  const auto *Call = Result.Nodes.getNodeAs<CallExpr>("call");
+  const auto *Op = Result.Nodes.getNodeAs<Expr>("op");
+
+  if (Op) {
+    diag(Call->getBeginLoc(),
+         "don't move the contents out of a shared pointer, as other accessors "
+         "expect them to remain in a determinate state")
+        << FixItHint::CreateInsertion(Call->getBeginLoc(), "*")
+        << FixItHint::CreateRemoval(Op->getBeginLoc());
+  }
+}
+
+} // namespace clang::tidy::bugprone
diff --git a/clang-tools-extra/clang-tidy/bugprone/MoveSharedPointerContentsCheck.h b/clang-tools-extra/clang-tidy/bugprone/MoveSharedPointerContentsCheck.h
new file mode 100644
index 00000000000000..a9ae8d335941e8
--- /dev/null
+++ b/clang-tools-extra/clang-tidy/bugprone/MoveSharedPointerContentsCheck.h
@@ -0,0 +1,37 @@
+//===--- MoveSharedPointerContentsCheck.h - clang-tidy ----------*- 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
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_MOVESHAREDPOINTERCONTENTSCHECK_H
+#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_MOVESHAREDPOINTERCONTENTSCHECK_H
+
+#include <vector>
+
+#include "../ClangTidyCheck.h"
+
+namespace clang::tidy::bugprone {
+
+/// FIXME: Write a short description.
+///
+/// For the user-facing documentation see:
+/// http://clang.llvm.org/extra/clang-tidy/checks/bugprone/move-shared-pointer-contents.html
+class MoveSharedPointerContentsCheck : public ClangTidyCheck {
+public:
+  MoveSharedPointerContentsCheck(StringRef Name, ClangTidyContext *Context);
+  ~MoveSharedPointerContentsCheck() override;
+  void registerMatchers(ast_matchers::MatchFinder *Finder) override;
+  void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
+  bool
+  isLanguageVersionSupported(const LangOptions &LangOptions) const override;
+
+private:
+  const std::vector<StringRef> SharedPointerClasses;
+};
+
+} // namespace clang::tidy::bugprone
+
+#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_MOVESHAREDPOINTERCONTENTSCHECK_H
diff --git a/clang-tools-extra/docs/ReleaseNotes.rst b/clang-tools-extra/docs/ReleaseNotes.rst
index 19c977977f9044..cbd472d86c4227 100644
--- a/clang-tools-extra/docs/ReleaseNotes.rst
+++ b/clang-tools-extra/docs/ReleaseNotes.rst
@@ -138,6 +138,12 @@ New checks
   Detects incorrect usages of ``std::enable_if`` that don't name the nested
   ``type`` type.
 
+- New :doc:`bugprone-move-shared-pointer-contents
+  <clang-tidy/checks/bugprone/move-shared-pointer-contents>` check.
+
+  Detects calls to move the contents out of a ``std::shared_ptr`` rather than
+  moving the pointer itself.
+
 - New :doc:`bugprone-multi-level-implicit-pointer-conversion
   <clang-tidy/checks/bugprone/multi-level-implicit-pointer-conversion>` check.
 
diff --git a/clang-tools-extra/docs/clang-tidy/checks/bugprone/move-shared-pointer-contents.rst b/clang-tools-extra/docs/clang-tidy/checks/bugprone/move-shared-pointer-contents.rst
new file mode 100644
index 00000000000000..4536663a1b7470
--- /dev/null
+++ b/clang-tools-extra/docs/clang-tidy/checks/bugprone/move-shared-pointer-contents.rst
@@ -0,0 +1,17 @@
+.. title:: clang-tidy - bugprone-move-shared-pointer-contents
+
+bugprone-move-shared-pointer-contents
+=====================================
+
+Detects calls to move the contents out of a ``std::shared_ptr`` rather than
+moving the pointer itself. In other words, calling ``std::move(*p)``. Other
+reference holders may not be expecting the move and suddenly getting empty or
+otherwise indeterminate states can cause issues.
+
+Options
+-------
+
+.. option :: SharedPointerClasses
+
+   A semicolon-separated list of class names that should be treated as shared
+   pointers. By default only `std::shared_ptr` is included.
diff --git a/clang-tools-extra/docs/clang-tidy/checks/list.rst b/clang-tools-extra/docs/clang-tidy/checks/list.rst
index 75a86431d26441..bfe8b15ccc7ea3 100644
--- a/clang-tools-extra/docs/clang-tidy/checks/list.rst
+++ b/clang-tools-extra/docs/clang-tidy/checks/list.rst
@@ -105,6 +105,7 @@ Clang-Tidy Checks
    :doc:`bugprone-misplaced-pointer-arithmetic-in-alloc <bugprone/misplaced-pointer-arithmetic-in-alloc>`, "Yes"
    :doc:`bugprone-misplaced-widening-cast <bugprone/misplaced-widening-cast>`,
    :doc:`bugprone-move-forwarding-reference <bugprone/move-forwarding-reference>`, "Yes"
+   :doc:`bugprone-move-shared-pointer-contents <bugprone/move-shared-pointer-contents>`, "Yes"
    :doc:`bugprone-multi-level-implicit-pointer-conversion <bugprone/multi-level-implicit-pointer-conversion>`,
    :doc:`bugprone-multiple-new-in-one-expression <bugprone/multiple-new-in-one-expression>`,
    :doc:`bugprone-multiple-statement-macro <bugprone/multiple-statement-macro>`,
@@ -116,6 +117,7 @@ Clang-Tidy Checks
    :doc:`bugprone-posix-return <bugprone/posix-return>`, "Yes"
    :doc:`bugprone-redundant-branch-condition <bugprone/redundant-branch-condition>`, "Yes"
    :doc:`bugprone-reserved-identifier <bugprone/reserved-identifier>`, "Yes"
+   :doc:`bugprone-shared-pointer-contents-move <bugprone/shared-pointer-contents-move>`, "Yes"
    :doc:`bugprone-shared-ptr-array-mismatch <bugprone/shared-ptr-array-mismatch>`, "Yes"
    :doc:`bugprone-signal-handler <bugprone/signal-handler>`,
    :doc:`bugprone-signed-char-misuse <bugprone/signed-char-misuse>`,
diff --git a/clang-tools-extra/test/clang-tidy/checkers/bugprone/move-shared-pointer-contents.cpp b/clang-tools-extra/test/clang-tidy/checkers/bugprone/move-shared-pointer-contents.cpp
new file mode 100644
index 00000000000000..0837708a7171c5
--- /dev/null
+++ b/clang-tools-extra/test/clang-tidy/checkers/bugprone/move-shared-pointer-contents.cpp
@@ -0,0 +1,68 @@
+// RUN: %check_clang_tidy %s bugprone-move-shared-pointer-contents %t -- -config="{CheckOptions: {bugprone-move-shared-pointer-contents.SharedPointerClasses: 'std::shared_ptr;my::OtherSharedPtr;'}}"
+
+// Some dummy definitions we'll need.
+
+namespace std {
+
+using size_t = int;
+
+template <typename> struct remove_reference;
+template <typename _Tp> struct remove_reference { typedef _Tp type; };
+template <typename _Tp> struct remove_reference<_Tp &> { typedef _Tp type; };
+template <typename _Tp> struct remove_reference<_Tp &&> { typedef _Tp type; };
+
+template <typename _Tp>
+constexpr typename std::remove_reference<_Tp>::type &&move(_Tp &&__t) {
+  return static_cast<typename std::remove_reference<_Tp>::type &&>(__t);
+}
+
+template <typename T>
+struct shared_ptr {
+  shared_ptr();
+  T *get() const;
+  explicit operator bool() const;
+  void reset(T *ptr);
+  T &operator*() const;
+  T *operator->() const;
+};
+
+}  // namespace std
+
+namespace my {
+template <typename T>
+using OtherSharedPtr = std::shared_ptr<T>;
+}  // namespace my
+
+void correct() {
+  std::shared_ptr<int> p;
+  int x = *std::move(p);
+}
+
+void simpleFinding() {
+  std::shared_ptr<int> p;
+  int y = std::move(*p);
+  // CHECK-FIXES: *std::move(p)
+}
+// CHECK-MESSAGES: :[[@LINE-3]]:11: warning: don't move the contents out of a shared pointer, as other accessors expect them to remain in a determinate state [bugprone-move-shared-pointer-contents]
+
+void aliasedType() {
+  using int_ptr = std::shared_ptr<int>;
+  int_ptr p;
+  int x = std::move(*p);
+  // CHECK-FIXES: *std::move(p)
+}
+// CHECK-MESSAGES: :[[@LINE-3]]:11: warning: don't move the contents out of a shared pointer, as other accessors expect them to remain in a determinate state [bugprone-move-shared-pointer-contents]
+
+void configWorks() {
+  my::OtherSharedPtr<int> p;
+  int x = std::move(*p);
+  // CHECK-FIXES: *std::move(p)
+}
+// CHECK-MESSAGES: :[[@LINE-3]]:11: warning: don't move the contents out of a shared pointer, as other accessors expect them to remain in a determinate state [bugprone-move-shared-pointer-contents]
+
+void multiStars() {
+  std::shared_ptr<int> p;
+  int x = 2 * std::move(*p) * 3;
+  // CHECK-FIXES: *std::move(p)
+}
+// CHECK-MESSAGES: :[[@LINE-3]]:15: warning: don't move the contents out of a shared pointer, as other accessors expect them to remain in a determinate state [bugprone-move-shared-pointer-contents]

>From 528146e8d1fae56d2d4cc2d32a0823aa1f9cbc2b Mon Sep 17 00:00:00 2001
From: David Pizzuto <pizzud at google.com>
Date: Tue, 26 Sep 2023 10:45:42 -0700
Subject: [PATCH 2/6] [clang-tidy] Add bugprone-move-shared-pointer-contents
 check.

This check detects moves of the contents of a shared pointer rather than the
pointer itself. Other code with a reference to the shared pointer is probably
not expecting the move.

The set of shared pointer classes is configurable via options to allow individual
projects to cover additional types.
---
 .../MoveSharedPointerContentsCheck.cpp        | 19 +++++--------------
 .../bugprone/MoveSharedPointerContentsCheck.h | 10 ++++++----
 .../bugprone/move-shared-pointer-contents.rst |  2 +-
 .../bugprone/move-shared-pointer-contents.cpp |  7 +++++++
 4 files changed, 19 insertions(+), 19 deletions(-)

diff --git a/clang-tools-extra/clang-tidy/bugprone/MoveSharedPointerContentsCheck.cpp b/clang-tools-extra/clang-tidy/bugprone/MoveSharedPointerContentsCheck.cpp
index b4a393b7f2f200..9730cf2f0603c7 100644
--- a/clang-tools-extra/clang-tidy/bugprone/MoveSharedPointerContentsCheck.cpp
+++ b/clang-tools-extra/clang-tidy/bugprone/MoveSharedPointerContentsCheck.cpp
@@ -23,13 +23,6 @@ MoveSharedPointerContentsCheck::MoveSharedPointerContentsCheck(
       SharedPointerClasses(utils::options::parseStringList(
           Options.get("SharedPointerClasses", "std::shared_ptr"))) {}
 
-MoveSharedPointerContentsCheck::~MoveSharedPointerContentsCheck() = default;
-
-bool MoveSharedPointerContentsCheck::isLanguageVersionSupported(
-    const LangOptions &LangOptions) const {
-  return LangOptions.CPlusPlus11;
-}
-
 void MoveSharedPointerContentsCheck::registerMatchers(MatchFinder *Finder) {
   Finder->addMatcher(
       callExpr(
@@ -48,13 +41,11 @@ void MoveSharedPointerContentsCheck::check(
   const auto *Call = Result.Nodes.getNodeAs<CallExpr>("call");
   const auto *Op = Result.Nodes.getNodeAs<Expr>("op");
 
-  if (Op) {
-    diag(Call->getBeginLoc(),
-         "don't move the contents out of a shared pointer, as other accessors "
-         "expect them to remain in a determinate state")
-        << FixItHint::CreateInsertion(Call->getBeginLoc(), "*")
-        << FixItHint::CreateRemoval(Op->getBeginLoc());
-  }
+  diag(Call->getBeginLoc(),
+       "don't move the contents out of a shared pointer, as other accessors "
+       "expect them to remain in a determinate state")
+      << FixItHint::CreateInsertion(Call->getBeginLoc(), "*")
+      << FixItHint::CreateRemoval(Op->getBeginLoc());
 }
 
 } // namespace clang::tidy::bugprone
diff --git a/clang-tools-extra/clang-tidy/bugprone/MoveSharedPointerContentsCheck.h b/clang-tools-extra/clang-tidy/bugprone/MoveSharedPointerContentsCheck.h
index a9ae8d335941e8..71b826596f23cc 100644
--- a/clang-tools-extra/clang-tidy/bugprone/MoveSharedPointerContentsCheck.h
+++ b/clang-tools-extra/clang-tidy/bugprone/MoveSharedPointerContentsCheck.h
@@ -10,23 +10,25 @@
 #define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_MOVESHAREDPOINTERCONTENTSCHECK_H
 
 #include <vector>
-
 #include "../ClangTidyCheck.h"
+#include "llvm/ADT/StringRef.h"
 
 namespace clang::tidy::bugprone {
 
-/// FIXME: Write a short description.
+/// Detects calls to move the contents out of a ``std::shared_ptr`` rather than
+/// moving the pointer itself. In other words, calling ``std::move(*p)``.
 ///
 /// For the user-facing documentation see:
 /// http://clang.llvm.org/extra/clang-tidy/checks/bugprone/move-shared-pointer-contents.html
 class MoveSharedPointerContentsCheck : public ClangTidyCheck {
 public:
   MoveSharedPointerContentsCheck(StringRef Name, ClangTidyContext *Context);
-  ~MoveSharedPointerContentsCheck() override;
   void registerMatchers(ast_matchers::MatchFinder *Finder) override;
   void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
   bool
-  isLanguageVersionSupported(const LangOptions &LangOptions) const override;
+  isLanguageVersionSupported(const LangOptions &LangOptions) const override {
+    return LangOptions.CPlusPlus11;
+  }
 
 private:
   const std::vector<StringRef> SharedPointerClasses;
diff --git a/clang-tools-extra/docs/clang-tidy/checks/bugprone/move-shared-pointer-contents.rst b/clang-tools-extra/docs/clang-tidy/checks/bugprone/move-shared-pointer-contents.rst
index 4536663a1b7470..bf7edcf74fbb61 100644
--- a/clang-tools-extra/docs/clang-tidy/checks/bugprone/move-shared-pointer-contents.rst
+++ b/clang-tools-extra/docs/clang-tidy/checks/bugprone/move-shared-pointer-contents.rst
@@ -14,4 +14,4 @@ Options
 .. option :: SharedPointerClasses
 
    A semicolon-separated list of class names that should be treated as shared
-   pointers. By default only `std::shared_ptr` is included.
+   pointers. Default is `std::shared_ptr`.
diff --git a/clang-tools-extra/test/clang-tidy/checkers/bugprone/move-shared-pointer-contents.cpp b/clang-tools-extra/test/clang-tidy/checkers/bugprone/move-shared-pointer-contents.cpp
index 0837708a7171c5..5f1980213c6be0 100644
--- a/clang-tools-extra/test/clang-tidy/checkers/bugprone/move-shared-pointer-contents.cpp
+++ b/clang-tools-extra/test/clang-tidy/checkers/bugprone/move-shared-pointer-contents.cpp
@@ -66,3 +66,10 @@ void multiStars() {
   // CHECK-FIXES: *std::move(p)
 }
 // CHECK-MESSAGES: :[[@LINE-3]]:15: warning: don't move the contents out of a shared pointer, as other accessors expect them to remain in a determinate state [bugprone-move-shared-pointer-contents]
+
+// This case should be caught, but isn't.
+template <typename T>
+void unresolved() {
+  std::shared_ptr<T> p;
+  T x = 2 * std::move(*p) * 3;
+}

>From 415e5518119537ee820485fdf7353e7265644758 Mon Sep 17 00:00:00 2001
From: David Pizzuto <pizzud at google.com>
Date: Tue, 26 Sep 2023 10:45:42 -0700
Subject: [PATCH 3/6] [clang-tidy] Add bugprone-move-shared-pointer-contents
 check.

This check detects moves of the contents of a shared pointer rather than the
pointer itself. Other code with a reference to the shared pointer is probably
not expecting the move.

The set of shared pointer classes is configurable via options to allow individual
projects to cover additional types.
---
 .../clang-tidy/bugprone/MoveSharedPointerContentsCheck.h        | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/clang-tools-extra/clang-tidy/bugprone/MoveSharedPointerContentsCheck.h b/clang-tools-extra/clang-tidy/bugprone/MoveSharedPointerContentsCheck.h
index 71b826596f23cc..681dfe7f4202b9 100644
--- a/clang-tools-extra/clang-tidy/bugprone/MoveSharedPointerContentsCheck.h
+++ b/clang-tools-extra/clang-tidy/bugprone/MoveSharedPointerContentsCheck.h
@@ -9,9 +9,9 @@
 #ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_MOVESHAREDPOINTERCONTENTSCHECK_H
 #define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_MOVESHAREDPOINTERCONTENTSCHECK_H
 
-#include <vector>
 #include "../ClangTidyCheck.h"
 #include "llvm/ADT/StringRef.h"
+#include <vector>
 
 namespace clang::tidy::bugprone {
 

>From 2d0fd03b76a7b86925526dc802d955e70993624b Mon Sep 17 00:00:00 2001
From: David Pizzuto <pizzud at google.com>
Date: Tue, 26 Sep 2023 10:45:42 -0700
Subject: [PATCH 4/6] [clang-tidy] Add bugprone-move-shared-pointer-contents
 check.

This check detects moves of the contents of a shared pointer rather than the
pointer itself. Other code with a reference to the shared pointer is probably
not expecting the move.

The set of shared pointer classes is configurable via options to allow individual
projects to cover additional types.
---
 .../clang-tidy/bugprone/CMakeLists.txt        |  1 -
 .../MoveSharedPointerContentsCheck.cpp        | 24 ++++----
 .../bugprone/MoveSharedPointerContentsCheck.h |  3 +
 .../docs/clang-tidy/checks/list.rst           |  3 +-
 .../bugprone/move-shared-pointer-contents.cpp | 55 ++++++++++++-------
 5 files changed, 49 insertions(+), 37 deletions(-)

diff --git a/clang-tools-extra/clang-tidy/bugprone/CMakeLists.txt b/clang-tools-extra/clang-tidy/bugprone/CMakeLists.txt
index e92b03ddfa883e..10be385a8de09c 100644
--- a/clang-tools-extra/clang-tidy/bugprone/CMakeLists.txt
+++ b/clang-tools-extra/clang-tidy/bugprone/CMakeLists.txt
@@ -25,7 +25,6 @@ add_clang_library(clangTidyBugproneModule
   ImplicitWideningOfMultiplicationResultCheck.cpp
   InaccurateEraseCheck.cpp
   IncorrectEnableIfCheck.cpp
-  MoveSharedPointerContentsCheck.cpp
   SwitchMissingDefaultCaseCheck.cpp
   IncDecInConditionsCheck.cpp
   IncorrectRoundingsCheck.cpp
diff --git a/clang-tools-extra/clang-tidy/bugprone/MoveSharedPointerContentsCheck.cpp b/clang-tools-extra/clang-tidy/bugprone/MoveSharedPointerContentsCheck.cpp
index 9730cf2f0603c7..92882885961f17 100644
--- a/clang-tools-extra/clang-tidy/bugprone/MoveSharedPointerContentsCheck.cpp
+++ b/clang-tools-extra/clang-tidy/bugprone/MoveSharedPointerContentsCheck.cpp
@@ -21,17 +21,19 @@ MoveSharedPointerContentsCheck::MoveSharedPointerContentsCheck(
     StringRef Name, ClangTidyContext *Context)
     : ClangTidyCheck(Name, Context),
       SharedPointerClasses(utils::options::parseStringList(
-          Options.get("SharedPointerClasses", "std::shared_ptr"))) {}
+          Options.get("SharedPointerClasses", "::std::shared_ptr"))) {}
 
 void MoveSharedPointerContentsCheck::registerMatchers(MatchFinder *Finder) {
   Finder->addMatcher(
-      callExpr(
-          callee(functionDecl(hasName("std::move"))),
-          hasArgument(0, cxxOperatorCallExpr(hasOverloadedOperatorName("*"),
-                                             callee(cxxMethodDecl(ofClass(
-                                                 matchers::matchesAnyListedName(
-                                                     SharedPointerClasses)))))
-                             .bind("op")))
+      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("*")))))
           .bind("call"),
       this);
 }
@@ -39,13 +41,9 @@ void MoveSharedPointerContentsCheck::registerMatchers(MatchFinder *Finder) {
 void MoveSharedPointerContentsCheck::check(
     const MatchFinder::MatchResult &Result) {
   const auto *Call = Result.Nodes.getNodeAs<CallExpr>("call");
-  const auto *Op = Result.Nodes.getNodeAs<Expr>("op");
-
   diag(Call->getBeginLoc(),
        "don't move the contents out of a shared pointer, as other accessors "
-       "expect them to remain in a determinate state")
-      << FixItHint::CreateInsertion(Call->getBeginLoc(), "*")
-      << FixItHint::CreateRemoval(Op->getBeginLoc());
+       "expect them to remain in a determinate state");
 }
 
 } // namespace clang::tidy::bugprone
diff --git a/clang-tools-extra/clang-tidy/bugprone/MoveSharedPointerContentsCheck.h b/clang-tools-extra/clang-tidy/bugprone/MoveSharedPointerContentsCheck.h
index 681dfe7f4202b9..88fc860b25c459 100644
--- a/clang-tools-extra/clang-tidy/bugprone/MoveSharedPointerContentsCheck.h
+++ b/clang-tools-extra/clang-tidy/bugprone/MoveSharedPointerContentsCheck.h
@@ -29,6 +29,9 @@ class MoveSharedPointerContentsCheck : public ClangTidyCheck {
   isLanguageVersionSupported(const LangOptions &LangOptions) const override {
     return LangOptions.CPlusPlus11;
   }
+  std::optional<TraversalKind> getCheckTraversalKind() const override {
+    return TK_AsIs;
+  }
 
 private:
   const std::vector<StringRef> SharedPointerClasses;
diff --git a/clang-tools-extra/docs/clang-tidy/checks/list.rst b/clang-tools-extra/docs/clang-tidy/checks/list.rst
index aaafa89cdbd594..5ea59b226fb329 100644
--- a/clang-tools-extra/docs/clang-tidy/checks/list.rst
+++ b/clang-tools-extra/docs/clang-tidy/checks/list.rst
@@ -107,7 +107,7 @@ Clang-Tidy Checks
    :doc:`bugprone-misplaced-pointer-arithmetic-in-alloc <bugprone/misplaced-pointer-arithmetic-in-alloc>`, "Yes"
    :doc:`bugprone-misplaced-widening-cast <bugprone/misplaced-widening-cast>`,
    :doc:`bugprone-move-forwarding-reference <bugprone/move-forwarding-reference>`, "Yes"
-   :doc:`bugprone-move-shared-pointer-contents <bugprone/move-shared-pointer-contents>`, "Yes"
+   :doc:`bugprone-move-shared-pointer-contents <bugprone/move-shared-pointer-contents>`,
    :doc:`bugprone-multi-level-implicit-pointer-conversion <bugprone/multi-level-implicit-pointer-conversion>`,
    :doc:`bugprone-multiple-new-in-one-expression <bugprone/multiple-new-in-one-expression>`,
    :doc:`bugprone-multiple-statement-macro <bugprone/multiple-statement-macro>`,
@@ -119,7 +119,6 @@ Clang-Tidy Checks
    :doc:`bugprone-posix-return <bugprone/posix-return>`, "Yes"
    :doc:`bugprone-redundant-branch-condition <bugprone/redundant-branch-condition>`, "Yes"
    :doc:`bugprone-reserved-identifier <bugprone/reserved-identifier>`, "Yes"
-   :doc:`bugprone-shared-pointer-contents-move <bugprone/shared-pointer-contents-move>`, "Yes"
    :doc:`bugprone-shared-ptr-array-mismatch <bugprone/shared-ptr-array-mismatch>`, "Yes"
    :doc:`bugprone-signal-handler <bugprone/signal-handler>`,
    :doc:`bugprone-signed-char-misuse <bugprone/signed-char-misuse>`,
diff --git a/clang-tools-extra/test/clang-tidy/checkers/bugprone/move-shared-pointer-contents.cpp b/clang-tools-extra/test/clang-tidy/checkers/bugprone/move-shared-pointer-contents.cpp
index 5f1980213c6be0..1ad7bfe7105160 100644
--- a/clang-tools-extra/test/clang-tidy/checkers/bugprone/move-shared-pointer-contents.cpp
+++ b/clang-tools-extra/test/clang-tidy/checkers/bugprone/move-shared-pointer-contents.cpp
@@ -33,43 +33,56 @@ template <typename T>
 using OtherSharedPtr = std::shared_ptr<T>;
 }  // namespace my
 
+struct Nontrivial {
+  int x;
+  Nontrivial() : x(2) {}
+  Nontrivial(Nontrivial& other) { x = other.x; }
+  Nontrivial(Nontrivial&& other) { x = std::move(other.x); }
+  Nontrivial& operator=(Nontrivial& other) { x = other.x; }
+  Nontrivial& operator=(Nontrivial&& other) { x = std::move(other.x); }
+};
+
+// Test cases begin here.
+
 void correct() {
-  std::shared_ptr<int> p;
-  int x = *std::move(p);
+  std::shared_ptr<Nontrivial> p;
+  Nontrivial x = *std::move(p);
 }
 
 void simpleFinding() {
-  std::shared_ptr<int> p;
-  int y = std::move(*p);
-  // CHECK-FIXES: *std::move(p)
+  std::shared_ptr<Nontrivial> p;
+  Nontrivial y = std::move(*p);
 }
-// CHECK-MESSAGES: :[[@LINE-3]]:11: warning: don't move the contents out of a shared pointer, as other accessors expect them to remain in a determinate state [bugprone-move-shared-pointer-contents]
+// CHECK-MESSAGES: :[[@LINE-2]]:18: warning: don't move the contents out of a shared pointer, as other accessors expect them to remain in a determinate state [bugprone-move-shared-pointer-contents]
 
 void aliasedType() {
-  using int_ptr = std::shared_ptr<int>;
-  int_ptr p;
-  int x = std::move(*p);
-  // CHECK-FIXES: *std::move(p)
+  using nontrivial_ptr = std::shared_ptr<Nontrivial>;
+  nontrivial_ptr p;
+  Nontrivial x = std::move(*p);
 }
-// CHECK-MESSAGES: :[[@LINE-3]]:11: warning: don't move the contents out of a shared pointer, as other accessors expect them to remain in a determinate state [bugprone-move-shared-pointer-contents]
+// CHECK-MESSAGES: :[[@LINE-2]]:18: warning: don't move the contents out of a shared pointer, as other accessors expect them to remain in a determinate state [bugprone-move-shared-pointer-contents]
 
 void configWorks() {
-  my::OtherSharedPtr<int> p;
-  int x = std::move(*p);
-  // CHECK-FIXES: *std::move(p)
+  my::OtherSharedPtr<Nontrivial> p;
+  Nontrivial x = std::move(*p);
 }
-// CHECK-MESSAGES: :[[@LINE-3]]:11: warning: don't move the contents out of a shared pointer, as other accessors expect them to remain in a determinate state [bugprone-move-shared-pointer-contents]
+// CHECK-MESSAGES: :[[@LINE-2]]:18: warning: don't move the contents out of a shared pointer, as other accessors expect them to remain in a determinate state [bugprone-move-shared-pointer-contents]
 
 void multiStars() {
-  std::shared_ptr<int> p;
-  int x = 2 * std::move(*p) * 3;
-  // CHECK-FIXES: *std::move(p)
+  std::shared_ptr<Nontrivial> p;
+  int x = 2 * std::move(*p).x * 3;
 }
-// CHECK-MESSAGES: :[[@LINE-3]]:15: warning: don't move the contents out of a shared pointer, as other accessors expect them to remain in a determinate state [bugprone-move-shared-pointer-contents]
+// CHECK-MESSAGES: :[[@LINE-2]]:15: warning: don't move the contents out of a shared pointer, as other accessors expect them to remain in a determinate state [bugprone-move-shared-pointer-contents]
 
-// This case should be caught, but isn't.
 template <typename T>
 void unresolved() {
   std::shared_ptr<T> p;
-  T x = 2 * std::move(*p) * 3;
+  int x = 2 * std::move(*p).x * 3;
+}
+// CHECK-MESSAGES: :[[@LINE-2]]:15: warning: don't move the contents out of a shared pointer, as other accessors expect them to remain in a determinate state [bugprone-move-shared-pointer-contents]
+
+void dereferencedGet() {
+  std::shared_ptr<Nontrivial> p;
+  Nontrivial x = std::move(*p.get());
 }
+// CHECK-MESSAGES: :[[@LINE-2]]:18: warning: don't move the contents out of a shared pointer, as other accessors expect them to remain in a determinate state [bugprone-move-shared-pointer-contents]

>From ca778d6ee12ad12e2095934ddf46a9c606b33b2c Mon Sep 17 00:00:00 2001
From: David Pizzuto <pizzud at google.com>
Date: Tue, 26 Sep 2023 10:45:42 -0700
Subject: [PATCH 5/6] [clang-tidy] Add bugprone-move-shared-pointer-contents
 check.

This check detects moves of the contents of a shared pointer rather than the
pointer itself. Other code with a reference to the shared pointer is probably
not expecting the move.

The set of shared pointer classes is configurable via options to allow individual
projects to cover additional types.
---
 .../clang-tidy/bugprone/CMakeLists.txt        |   1 -
 .../MoveSharedPointerContentsCheck.cpp        | 130 ++++++++++++++++--
 .../bugprone/MoveSharedPointerContentsCheck.h |   7 +
 .../bugprone/move-shared-pointer-contents.rst |  12 +-
 .../docs/clang-tidy/checks/list.rst           |   3 +-
 .../bugprone/move-shared-pointer-contents.cpp |  93 ++++++++++---
 6 files changed, 204 insertions(+), 42 deletions(-)

diff --git a/clang-tools-extra/clang-tidy/bugprone/CMakeLists.txt b/clang-tools-extra/clang-tidy/bugprone/CMakeLists.txt
index e92b03ddfa883e..10be385a8de09c 100644
--- a/clang-tools-extra/clang-tidy/bugprone/CMakeLists.txt
+++ b/clang-tools-extra/clang-tidy/bugprone/CMakeLists.txt
@@ -25,7 +25,6 @@ add_clang_library(clangTidyBugproneModule
   ImplicitWideningOfMultiplicationResultCheck.cpp
   InaccurateEraseCheck.cpp
   IncorrectEnableIfCheck.cpp
-  MoveSharedPointerContentsCheck.cpp
   SwitchMissingDefaultCaseCheck.cpp
   IncDecInConditionsCheck.cpp
   IncorrectRoundingsCheck.cpp
diff --git a/clang-tools-extra/clang-tidy/bugprone/MoveSharedPointerContentsCheck.cpp b/clang-tools-extra/clang-tidy/bugprone/MoveSharedPointerContentsCheck.cpp
index 9730cf2f0603c7..ae3944ba5d26df 100644
--- a/clang-tools-extra/clang-tidy/bugprone/MoveSharedPointerContentsCheck.cpp
+++ b/clang-tools-extra/clang-tidy/bugprone/MoveSharedPointerContentsCheck.cpp
@@ -21,31 +21,137 @@ MoveSharedPointerContentsCheck::MoveSharedPointerContentsCheck(
     StringRef Name, ClangTidyContext *Context)
     : ClangTidyCheck(Name, Context),
       SharedPointerClasses(utils::options::parseStringList(
-          Options.get("SharedPointerClasses", "std::shared_ptr"))) {}
+          Options.get("SharedPointerClasses", "::std::shared_ptr"))) {}
 
 void MoveSharedPointerContentsCheck::registerMatchers(MatchFinder *Finder) {
+  auto isStdMove = callee(functionDecl(hasName("::std::move")));
+
+  // Resolved type, direct move.
   Finder->addMatcher(
-      callExpr(
-          callee(functionDecl(hasName("std::move"))),
-          hasArgument(0, cxxOperatorCallExpr(hasOverloadedOperatorName("*"),
+      callExpr(isStdMove, hasArgument(0, cxxOperatorCallExpr(
+                                             hasOverloadedOperatorName("*"),
                                              callee(cxxMethodDecl(ofClass(
                                                  matchers::matchesAnyListedName(
-                                                     SharedPointerClasses)))))
-                             .bind("op")))
+                                                     SharedPointerClasses)))))))
           .bind("call"),
       this);
+
+  // Resolved type, move out of get().
+  Finder->addMatcher(
+      callExpr(
+          isStdMove,
+          hasArgument(
+              0, unaryOperator(
+                     hasOperatorName("*"),
+                     hasUnaryOperand(cxxMemberCallExpr(callee(cxxMethodDecl(
+                         hasName("get"), ofClass(matchers::matchesAnyListedName(
+                                             SharedPointerClasses)))))))))
+          .bind("get_call"),
+      this);
+
+  auto isStdMoveUnresolved = callee(unresolvedLookupExpr(
+      hasAnyDeclaration(namedDecl(hasUnderlyingDecl(hasName("::std::move"))))));
+
+  // Unresolved type, direct move.
+  Finder->addMatcher(
+      callExpr(
+          isStdMoveUnresolved,
+          hasArgument(0, unaryOperator(hasOperatorName("*"),
+                                       hasUnaryOperand(declRefExpr(hasType(
+                                           qualType().bind("unresolved_p")))))))
+          .bind("unresolved_call"),
+      this);
+  // Annoyingly, the declRefExpr in the unresolved-move-of-get() case
+  // is of <dependent type> rather than shared_ptr<T>, so we have to
+  // just fetch the variable. This does leave a gap where a temporary
+  // shared_ptr wouldn't be caught, but moving out of a temporary
+  // shared pointer is a truly wild thing to do so it should be okay.
+
+  // Unresolved type, move out of get().
+  Finder->addMatcher(
+      callExpr(isStdMoveUnresolved,
+               hasArgument(
+                   0, unaryOperator(hasOperatorName("*"),
+                                    hasDescendant(cxxDependentScopeMemberExpr(
+                                        hasMemberName("get"))),
+                                    hasDescendant(declRefExpr(to(
+                                        varDecl().bind("unresolved_get_p")))))))
+          .bind("unresolved_get_call"),
+      this);
+}
+
+bool MoveSharedPointerContentsCheck::isSharedPointerClass(
+    const VarDecl *VD) const {
+  if (VD == nullptr) {
+    return false;
+  }
+
+  const QualType QT = VD->getType();
+  return isSharedPointerClass(&QT);
+}
+
+bool MoveSharedPointerContentsCheck::isSharedPointerClass(
+    const QualType *QT) const {
+  if (QT == nullptr) {
+    return false;
+  }
+  // We want the qualified name without template parameters,
+  // const/volatile, or reference/pointer qualifiers so we can look
+  // it up in SharedPointerClasses. This is a bit messy, but gets us
+  // to the underlying type without template parameters (eg
+  // std::shared_ptr) or const/volatile qualifiers even in the face of
+  // typedefs.
+
+  bool found = false;
+  auto *Template = llvm::dyn_cast<TemplateSpecializationType>(
+      QT->getSplitDesugaredType().Ty);
+  if (Template != nullptr) {
+    const std::string TypeName = Template->getTemplateName()
+                                     .getAsTemplateDecl()
+                                     ->getQualifiedNameAsString();
+    for (const llvm::StringRef SharedPointer : SharedPointerClasses) {
+      // SharedPointer entries may or may not have leading ::, but TypeName
+      // definitely won't.
+      if (SharedPointer == TypeName || SharedPointer.substr(2) == TypeName) {
+        found = true;
+        break;
+      }
+    }
+  }
+
+  return found;
 }
 
 void MoveSharedPointerContentsCheck::check(
     const MatchFinder::MatchResult &Result) {
   const auto *Call = Result.Nodes.getNodeAs<CallExpr>("call");
-  const auto *Op = Result.Nodes.getNodeAs<Expr>("op");
+  const auto *GetCall = Result.Nodes.getNodeAs<CallExpr>("get_call");
+  const auto *UnresolvedCall =
+      Result.Nodes.getNodeAs<CallExpr>("unresolved_call");
+  const auto *UnresolvedPtr = Result.Nodes.getNodeAs<QualType>("unresolved_p");
+  const auto *UnresolvedGetCall =
+      Result.Nodes.getNodeAs<CallExpr>("unresolved_get_call");
+  const auto *UnresolvedGetPtr =
+      Result.Nodes.getNodeAs<VarDecl>("unresolved_get_p");
+
+  const bool Unresolved = isSharedPointerClass(UnresolvedPtr);
+  const bool UnresolvedGet = isSharedPointerClass(UnresolvedGetPtr);
 
-  diag(Call->getBeginLoc(),
-       "don't move the contents out of a shared pointer, as other accessors "
-       "expect them to remain in a determinate state")
-      << FixItHint::CreateInsertion(Call->getBeginLoc(), "*")
-      << FixItHint::CreateRemoval(Op->getBeginLoc());
+  clang::SourceLocation Loc;
+  if (Unresolved) {
+    Loc = UnresolvedCall->getBeginLoc();
+  } else if (UnresolvedGet) {
+    Loc = UnresolvedGetCall->getBeginLoc();
+  } else if (GetCall != nullptr) {
+    Loc = GetCall->getBeginLoc();
+  } else if (Call != nullptr) {
+    Loc = Call->getBeginLoc();
+  }
+  if (Loc.isValid()) {
+    diag(Loc,
+         "don't move the contents out of a shared pointer, as other accessors "
+         "expect them to remain in a determinate state");
+  }
 }
 
 } // namespace clang::tidy::bugprone
diff --git a/clang-tools-extra/clang-tidy/bugprone/MoveSharedPointerContentsCheck.h b/clang-tools-extra/clang-tidy/bugprone/MoveSharedPointerContentsCheck.h
index 681dfe7f4202b9..46cf31f53d315f 100644
--- a/clang-tools-extra/clang-tidy/bugprone/MoveSharedPointerContentsCheck.h
+++ b/clang-tools-extra/clang-tidy/bugprone/MoveSharedPointerContentsCheck.h
@@ -29,8 +29,15 @@ class MoveSharedPointerContentsCheck : public ClangTidyCheck {
   isLanguageVersionSupported(const LangOptions &LangOptions) const override {
     return LangOptions.CPlusPlus11;
   }
+  std::optional<TraversalKind> getCheckTraversalKind() const override {
+    return TK_IgnoreUnlessSpelledInSource;
+  }
 
 private:
+  // Returns whether the type or variable is one of the SharedPointerClasses.
+  bool isSharedPointerClass(const QualType *QT) const;
+  bool isSharedPointerClass(const VarDecl *VD) const;
+
   const std::vector<StringRef> SharedPointerClasses;
 };
 
diff --git a/clang-tools-extra/docs/clang-tidy/checks/bugprone/move-shared-pointer-contents.rst b/clang-tools-extra/docs/clang-tidy/checks/bugprone/move-shared-pointer-contents.rst
index bf7edcf74fbb61..53cd861557e21c 100644
--- a/clang-tools-extra/docs/clang-tidy/checks/bugprone/move-shared-pointer-contents.rst
+++ b/clang-tools-extra/docs/clang-tidy/checks/bugprone/move-shared-pointer-contents.rst
@@ -3,10 +3,11 @@
 bugprone-move-shared-pointer-contents
 =====================================
 
-Detects calls to move the contents out of a ``std::shared_ptr`` rather than
-moving the pointer itself. In other words, calling ``std::move(*p)``. Other
-reference holders may not be expecting the move and suddenly getting empty or
-otherwise indeterminate states can cause issues.
+Detects calls to move the contents out of a ``std::shared_ptr`` rather
+than moving the pointer itself. In other words, calling
+``std::move(*p)`` or ``std::move(*p.get())``. Other reference holders
+may not be expecting the move and suddenly getting empty or otherwise
+indeterminate states can cause issues.
 
 Options
 -------
@@ -14,4 +15,5 @@ Options
 .. option :: SharedPointerClasses
 
    A semicolon-separated list of class names that should be treated as shared
-   pointers. Default is `std::shared_ptr`.
+   pointers. Classes are resolved through aliases, so any alias to the defined
+   classes will be considered. Default is `std::shared_ptr`.
diff --git a/clang-tools-extra/docs/clang-tidy/checks/list.rst b/clang-tools-extra/docs/clang-tidy/checks/list.rst
index aaafa89cdbd594..5ea59b226fb329 100644
--- a/clang-tools-extra/docs/clang-tidy/checks/list.rst
+++ b/clang-tools-extra/docs/clang-tidy/checks/list.rst
@@ -107,7 +107,7 @@ Clang-Tidy Checks
    :doc:`bugprone-misplaced-pointer-arithmetic-in-alloc <bugprone/misplaced-pointer-arithmetic-in-alloc>`, "Yes"
    :doc:`bugprone-misplaced-widening-cast <bugprone/misplaced-widening-cast>`,
    :doc:`bugprone-move-forwarding-reference <bugprone/move-forwarding-reference>`, "Yes"
-   :doc:`bugprone-move-shared-pointer-contents <bugprone/move-shared-pointer-contents>`, "Yes"
+   :doc:`bugprone-move-shared-pointer-contents <bugprone/move-shared-pointer-contents>`,
    :doc:`bugprone-multi-level-implicit-pointer-conversion <bugprone/multi-level-implicit-pointer-conversion>`,
    :doc:`bugprone-multiple-new-in-one-expression <bugprone/multiple-new-in-one-expression>`,
    :doc:`bugprone-multiple-statement-macro <bugprone/multiple-statement-macro>`,
@@ -119,7 +119,6 @@ Clang-Tidy Checks
    :doc:`bugprone-posix-return <bugprone/posix-return>`, "Yes"
    :doc:`bugprone-redundant-branch-condition <bugprone/redundant-branch-condition>`, "Yes"
    :doc:`bugprone-reserved-identifier <bugprone/reserved-identifier>`, "Yes"
-   :doc:`bugprone-shared-pointer-contents-move <bugprone/shared-pointer-contents-move>`, "Yes"
    :doc:`bugprone-shared-ptr-array-mismatch <bugprone/shared-ptr-array-mismatch>`, "Yes"
    :doc:`bugprone-signal-handler <bugprone/signal-handler>`,
    :doc:`bugprone-signed-char-misuse <bugprone/signed-char-misuse>`,
diff --git a/clang-tools-extra/test/clang-tidy/checkers/bugprone/move-shared-pointer-contents.cpp b/clang-tools-extra/test/clang-tidy/checkers/bugprone/move-shared-pointer-contents.cpp
index 5f1980213c6be0..d4cc75cdc2f939 100644
--- a/clang-tools-extra/test/clang-tidy/checkers/bugprone/move-shared-pointer-contents.cpp
+++ b/clang-tools-extra/test/clang-tidy/checkers/bugprone/move-shared-pointer-contents.cpp
@@ -1,4 +1,4 @@
-// RUN: %check_clang_tidy %s bugprone-move-shared-pointer-contents %t -- -config="{CheckOptions: {bugprone-move-shared-pointer-contents.SharedPointerClasses: 'std::shared_ptr;my::OtherSharedPtr;'}}"
+// RUN: %check_clang_tidy %s bugprone-move-shared-pointer-contents %t -- -config="{CheckOptions: {bugprone-move-shared-pointer-contents.SharedPointerClasses: '::std::shared_ptr;my::OtherSharedPtr;'}}"
 
 // Some dummy definitions we'll need.
 
@@ -31,45 +31,94 @@ struct shared_ptr {
 namespace my {
 template <typename T>
 using OtherSharedPtr = std::shared_ptr<T>;
+// Not part of the config.
+template <typename T>
+using YetAnotherSharedPtr = T*;
 }  // namespace my
 
+struct Nontrivial {
+  int x;
+  Nontrivial() : x(2) {}
+  Nontrivial(Nontrivial& other) { x = other.x; }
+  Nontrivial(Nontrivial&& other) { x = std::move(other.x); }
+  Nontrivial& operator=(Nontrivial& other) { x = other.x; }
+  Nontrivial& operator=(Nontrivial&& other) { x = std::move(other.x); }
+};
+
+// Test cases begin here.
+
 void correct() {
-  std::shared_ptr<int> p;
-  int x = *std::move(p);
+  std::shared_ptr<Nontrivial> p;
+  Nontrivial x = *std::move(p);
 }
 
 void simpleFinding() {
-  std::shared_ptr<int> p;
-  int y = std::move(*p);
-  // CHECK-FIXES: *std::move(p)
+  std::shared_ptr<Nontrivial> p;
+  Nontrivial y = std::move(*p);
 }
-// CHECK-MESSAGES: :[[@LINE-3]]:11: warning: don't move the contents out of a shared pointer, as other accessors expect them to remain in a determinate state [bugprone-move-shared-pointer-contents]
+// CHECK-MESSAGES: :[[@LINE-2]]:18: warning: don't move the contents out of a shared pointer, as other accessors expect them to remain in a determinate state [bugprone-move-shared-pointer-contents]
 
 void aliasedType() {
-  using int_ptr = std::shared_ptr<int>;
-  int_ptr p;
-  int x = std::move(*p);
-  // CHECK-FIXES: *std::move(p)
+  using nontrivial_ptr = std::shared_ptr<Nontrivial>;
+  nontrivial_ptr p;
+  Nontrivial x = std::move(*p);
 }
-// CHECK-MESSAGES: :[[@LINE-3]]:11: warning: don't move the contents out of a shared pointer, as other accessors expect them to remain in a determinate state [bugprone-move-shared-pointer-contents]
+// CHECK-MESSAGES: :[[@LINE-2]]:18: warning: don't move the contents out of a shared pointer, as other accessors expect them to remain in a determinate state [bugprone-move-shared-pointer-contents]
 
 void configWorks() {
-  my::OtherSharedPtr<int> p;
-  int x = std::move(*p);
-  // CHECK-FIXES: *std::move(p)
+  my::OtherSharedPtr<Nontrivial> p;
+  Nontrivial x = std::move(*p);
+}
+// CHECK-MESSAGES: :[[@LINE-2]]:18: warning: don't move the contents out of a shared pointer, as other accessors expect them to remain in a determinate state [bugprone-move-shared-pointer-contents]
+
+void sharedEsquePointerNotInConfig() {
+  my::YetAnotherSharedPtr<Nontrivial> p;
+  Nontrivial x = std::move(*p);
 }
-// CHECK-MESSAGES: :[[@LINE-3]]:11: warning: don't move the contents out of a shared pointer, as other accessors expect them to remain in a determinate state [bugprone-move-shared-pointer-contents]
 
 void multiStars() {
-  std::shared_ptr<int> p;
-  int x = 2 * std::move(*p) * 3;
-  // CHECK-FIXES: *std::move(p)
+  std::shared_ptr<Nontrivial> p;
+  int x = 2 * std::move(*p).x * 3;
 }
-// CHECK-MESSAGES: :[[@LINE-3]]:15: warning: don't move the contents out of a shared pointer, as other accessors expect them to remain in a determinate state [bugprone-move-shared-pointer-contents]
+// CHECK-MESSAGES: :[[@LINE-2]]:15: warning: don't move the contents out of a shared pointer, as other accessors expect them to remain in a determinate state [bugprone-move-shared-pointer-contents]
 
-// This case should be caught, but isn't.
 template <typename T>
 void unresolved() {
   std::shared_ptr<T> p;
-  T x = 2 * std::move(*p) * 3;
+  int x = 2 * std::move(*p).x * 3;
+}
+// CHECK-MESSAGES: :[[@LINE-2]]:15: warning: don't move the contents out of a shared pointer, as other accessors expect them to remain in a determinate state [bugprone-move-shared-pointer-contents]
+
+template <typename T>
+void unresolvedAsAReference() {
+  std::shared_ptr<T> p;
+  std::shared_ptr<T>& q = p;
+  int x = 2 * std::move(*q).x * 3;
+}
+// CHECK-MESSAGES: :[[@LINE-2]]:15: warning: don't move the contents out of a shared pointer, as other accessors expect them to remain in a determinate state [bugprone-move-shared-pointer-contents]
+
+template <typename T>
+void unresolvedAlias() {
+  my::OtherSharedPtr<T> p;
+  Nontrivial x = std::move(*p);
+}
+// CHECK-MESSAGES: :[[@LINE-2]]:18: warning: don't move the contents out of a shared pointer, as other accessors expect them to remain in a determinate state [bugprone-move-shared-pointer-contents]
+
+void dereferencedGet() {
+  std::shared_ptr<Nontrivial> p;
+  Nontrivial x = std::move(*p.get());
+}
+// CHECK-MESSAGES: :[[@LINE-2]]:18: warning: don't move the contents out of a shared pointer, as other accessors expect them to remain in a determinate state [bugprone-move-shared-pointer-contents]
+
+template <typename T>
+void unresolvedDereferencedGet() {
+  std::shared_ptr<T> p;
+  T x = std::move(*p.get());
+}
+// CHECK-MESSAGES: :[[@LINE-2]]:9: warning: don't move the contents out of a shared pointer, as other accessors expect them to remain in a determinate state [bugprone-move-shared-pointer-contents]
+
+template <typename T>
+void rawPointer() {
+  T* p;
+  T x = std::move(*p);
 }

>From 173717103dd28d94f88d10432804b19ee118e46e Mon Sep 17 00:00:00 2001
From: David Pizzuto <pizzud at google.com>
Date: Tue, 26 Sep 2023 10:45:42 -0700
Subject: [PATCH 6/6] [clang-tidy] Add bugprone-move-shared-pointer-contents
 check.

This check detects moves of the contents of a shared pointer rather than the
pointer itself. Other code with a reference to the shared pointer is probably
not expecting the move.

The set of shared pointer classes is configurable via options to allow individual
projects to cover additional types.
---
 .../clang-tidy/bugprone/CMakeLists.txt        |   1 -
 .../MoveSharedPointerContentsCheck.cpp        | 130 ++++++++++++++++--
 .../bugprone/MoveSharedPointerContentsCheck.h |   7 +
 .../bugprone/move-shared-pointer-contents.rst |  12 +-
 .../docs/clang-tidy/checks/list.rst           |   3 +-
 .../bugprone/move-shared-pointer-contents.cpp |  93 ++++++++++---
 6 files changed, 204 insertions(+), 42 deletions(-)

diff --git a/clang-tools-extra/clang-tidy/bugprone/CMakeLists.txt b/clang-tools-extra/clang-tidy/bugprone/CMakeLists.txt
index e92b03ddfa883e..10be385a8de09c 100644
--- a/clang-tools-extra/clang-tidy/bugprone/CMakeLists.txt
+++ b/clang-tools-extra/clang-tidy/bugprone/CMakeLists.txt
@@ -25,7 +25,6 @@ add_clang_library(clangTidyBugproneModule
   ImplicitWideningOfMultiplicationResultCheck.cpp
   InaccurateEraseCheck.cpp
   IncorrectEnableIfCheck.cpp
-  MoveSharedPointerContentsCheck.cpp
   SwitchMissingDefaultCaseCheck.cpp
   IncDecInConditionsCheck.cpp
   IncorrectRoundingsCheck.cpp
diff --git a/clang-tools-extra/clang-tidy/bugprone/MoveSharedPointerContentsCheck.cpp b/clang-tools-extra/clang-tidy/bugprone/MoveSharedPointerContentsCheck.cpp
index 9730cf2f0603c7..ae3944ba5d26df 100644
--- a/clang-tools-extra/clang-tidy/bugprone/MoveSharedPointerContentsCheck.cpp
+++ b/clang-tools-extra/clang-tidy/bugprone/MoveSharedPointerContentsCheck.cpp
@@ -21,31 +21,137 @@ MoveSharedPointerContentsCheck::MoveSharedPointerContentsCheck(
     StringRef Name, ClangTidyContext *Context)
     : ClangTidyCheck(Name, Context),
       SharedPointerClasses(utils::options::parseStringList(
-          Options.get("SharedPointerClasses", "std::shared_ptr"))) {}
+          Options.get("SharedPointerClasses", "::std::shared_ptr"))) {}
 
 void MoveSharedPointerContentsCheck::registerMatchers(MatchFinder *Finder) {
+  auto isStdMove = callee(functionDecl(hasName("::std::move")));
+
+  // Resolved type, direct move.
   Finder->addMatcher(
-      callExpr(
-          callee(functionDecl(hasName("std::move"))),
-          hasArgument(0, cxxOperatorCallExpr(hasOverloadedOperatorName("*"),
+      callExpr(isStdMove, hasArgument(0, cxxOperatorCallExpr(
+                                             hasOverloadedOperatorName("*"),
                                              callee(cxxMethodDecl(ofClass(
                                                  matchers::matchesAnyListedName(
-                                                     SharedPointerClasses)))))
-                             .bind("op")))
+                                                     SharedPointerClasses)))))))
           .bind("call"),
       this);
+
+  // Resolved type, move out of get().
+  Finder->addMatcher(
+      callExpr(
+          isStdMove,
+          hasArgument(
+              0, unaryOperator(
+                     hasOperatorName("*"),
+                     hasUnaryOperand(cxxMemberCallExpr(callee(cxxMethodDecl(
+                         hasName("get"), ofClass(matchers::matchesAnyListedName(
+                                             SharedPointerClasses)))))))))
+          .bind("get_call"),
+      this);
+
+  auto isStdMoveUnresolved = callee(unresolvedLookupExpr(
+      hasAnyDeclaration(namedDecl(hasUnderlyingDecl(hasName("::std::move"))))));
+
+  // Unresolved type, direct move.
+  Finder->addMatcher(
+      callExpr(
+          isStdMoveUnresolved,
+          hasArgument(0, unaryOperator(hasOperatorName("*"),
+                                       hasUnaryOperand(declRefExpr(hasType(
+                                           qualType().bind("unresolved_p")))))))
+          .bind("unresolved_call"),
+      this);
+  // Annoyingly, the declRefExpr in the unresolved-move-of-get() case
+  // is of <dependent type> rather than shared_ptr<T>, so we have to
+  // just fetch the variable. This does leave a gap where a temporary
+  // shared_ptr wouldn't be caught, but moving out of a temporary
+  // shared pointer is a truly wild thing to do so it should be okay.
+
+  // Unresolved type, move out of get().
+  Finder->addMatcher(
+      callExpr(isStdMoveUnresolved,
+               hasArgument(
+                   0, unaryOperator(hasOperatorName("*"),
+                                    hasDescendant(cxxDependentScopeMemberExpr(
+                                        hasMemberName("get"))),
+                                    hasDescendant(declRefExpr(to(
+                                        varDecl().bind("unresolved_get_p")))))))
+          .bind("unresolved_get_call"),
+      this);
+}
+
+bool MoveSharedPointerContentsCheck::isSharedPointerClass(
+    const VarDecl *VD) const {
+  if (VD == nullptr) {
+    return false;
+  }
+
+  const QualType QT = VD->getType();
+  return isSharedPointerClass(&QT);
+}
+
+bool MoveSharedPointerContentsCheck::isSharedPointerClass(
+    const QualType *QT) const {
+  if (QT == nullptr) {
+    return false;
+  }
+  // We want the qualified name without template parameters,
+  // const/volatile, or reference/pointer qualifiers so we can look
+  // it up in SharedPointerClasses. This is a bit messy, but gets us
+  // to the underlying type without template parameters (eg
+  // std::shared_ptr) or const/volatile qualifiers even in the face of
+  // typedefs.
+
+  bool found = false;
+  auto *Template = llvm::dyn_cast<TemplateSpecializationType>(
+      QT->getSplitDesugaredType().Ty);
+  if (Template != nullptr) {
+    const std::string TypeName = Template->getTemplateName()
+                                     .getAsTemplateDecl()
+                                     ->getQualifiedNameAsString();
+    for (const llvm::StringRef SharedPointer : SharedPointerClasses) {
+      // SharedPointer entries may or may not have leading ::, but TypeName
+      // definitely won't.
+      if (SharedPointer == TypeName || SharedPointer.substr(2) == TypeName) {
+        found = true;
+        break;
+      }
+    }
+  }
+
+  return found;
 }
 
 void MoveSharedPointerContentsCheck::check(
     const MatchFinder::MatchResult &Result) {
   const auto *Call = Result.Nodes.getNodeAs<CallExpr>("call");
-  const auto *Op = Result.Nodes.getNodeAs<Expr>("op");
+  const auto *GetCall = Result.Nodes.getNodeAs<CallExpr>("get_call");
+  const auto *UnresolvedCall =
+      Result.Nodes.getNodeAs<CallExpr>("unresolved_call");
+  const auto *UnresolvedPtr = Result.Nodes.getNodeAs<QualType>("unresolved_p");
+  const auto *UnresolvedGetCall =
+      Result.Nodes.getNodeAs<CallExpr>("unresolved_get_call");
+  const auto *UnresolvedGetPtr =
+      Result.Nodes.getNodeAs<VarDecl>("unresolved_get_p");
+
+  const bool Unresolved = isSharedPointerClass(UnresolvedPtr);
+  const bool UnresolvedGet = isSharedPointerClass(UnresolvedGetPtr);
 
-  diag(Call->getBeginLoc(),
-       "don't move the contents out of a shared pointer, as other accessors "
-       "expect them to remain in a determinate state")
-      << FixItHint::CreateInsertion(Call->getBeginLoc(), "*")
-      << FixItHint::CreateRemoval(Op->getBeginLoc());
+  clang::SourceLocation Loc;
+  if (Unresolved) {
+    Loc = UnresolvedCall->getBeginLoc();
+  } else if (UnresolvedGet) {
+    Loc = UnresolvedGetCall->getBeginLoc();
+  } else if (GetCall != nullptr) {
+    Loc = GetCall->getBeginLoc();
+  } else if (Call != nullptr) {
+    Loc = Call->getBeginLoc();
+  }
+  if (Loc.isValid()) {
+    diag(Loc,
+         "don't move the contents out of a shared pointer, as other accessors "
+         "expect them to remain in a determinate state");
+  }
 }
 
 } // namespace clang::tidy::bugprone
diff --git a/clang-tools-extra/clang-tidy/bugprone/MoveSharedPointerContentsCheck.h b/clang-tools-extra/clang-tidy/bugprone/MoveSharedPointerContentsCheck.h
index 681dfe7f4202b9..46cf31f53d315f 100644
--- a/clang-tools-extra/clang-tidy/bugprone/MoveSharedPointerContentsCheck.h
+++ b/clang-tools-extra/clang-tidy/bugprone/MoveSharedPointerContentsCheck.h
@@ -29,8 +29,15 @@ class MoveSharedPointerContentsCheck : public ClangTidyCheck {
   isLanguageVersionSupported(const LangOptions &LangOptions) const override {
     return LangOptions.CPlusPlus11;
   }
+  std::optional<TraversalKind> getCheckTraversalKind() const override {
+    return TK_IgnoreUnlessSpelledInSource;
+  }
 
 private:
+  // Returns whether the type or variable is one of the SharedPointerClasses.
+  bool isSharedPointerClass(const QualType *QT) const;
+  bool isSharedPointerClass(const VarDecl *VD) const;
+
   const std::vector<StringRef> SharedPointerClasses;
 };
 
diff --git a/clang-tools-extra/docs/clang-tidy/checks/bugprone/move-shared-pointer-contents.rst b/clang-tools-extra/docs/clang-tidy/checks/bugprone/move-shared-pointer-contents.rst
index bf7edcf74fbb61..53cd861557e21c 100644
--- a/clang-tools-extra/docs/clang-tidy/checks/bugprone/move-shared-pointer-contents.rst
+++ b/clang-tools-extra/docs/clang-tidy/checks/bugprone/move-shared-pointer-contents.rst
@@ -3,10 +3,11 @@
 bugprone-move-shared-pointer-contents
 =====================================
 
-Detects calls to move the contents out of a ``std::shared_ptr`` rather than
-moving the pointer itself. In other words, calling ``std::move(*p)``. Other
-reference holders may not be expecting the move and suddenly getting empty or
-otherwise indeterminate states can cause issues.
+Detects calls to move the contents out of a ``std::shared_ptr`` rather
+than moving the pointer itself. In other words, calling
+``std::move(*p)`` or ``std::move(*p.get())``. Other reference holders
+may not be expecting the move and suddenly getting empty or otherwise
+indeterminate states can cause issues.
 
 Options
 -------
@@ -14,4 +15,5 @@ Options
 .. option :: SharedPointerClasses
 
    A semicolon-separated list of class names that should be treated as shared
-   pointers. Default is `std::shared_ptr`.
+   pointers. Classes are resolved through aliases, so any alias to the defined
+   classes will be considered. Default is `std::shared_ptr`.
diff --git a/clang-tools-extra/docs/clang-tidy/checks/list.rst b/clang-tools-extra/docs/clang-tidy/checks/list.rst
index aaafa89cdbd594..5ea59b226fb329 100644
--- a/clang-tools-extra/docs/clang-tidy/checks/list.rst
+++ b/clang-tools-extra/docs/clang-tidy/checks/list.rst
@@ -107,7 +107,7 @@ Clang-Tidy Checks
    :doc:`bugprone-misplaced-pointer-arithmetic-in-alloc <bugprone/misplaced-pointer-arithmetic-in-alloc>`, "Yes"
    :doc:`bugprone-misplaced-widening-cast <bugprone/misplaced-widening-cast>`,
    :doc:`bugprone-move-forwarding-reference <bugprone/move-forwarding-reference>`, "Yes"
-   :doc:`bugprone-move-shared-pointer-contents <bugprone/move-shared-pointer-contents>`, "Yes"
+   :doc:`bugprone-move-shared-pointer-contents <bugprone/move-shared-pointer-contents>`,
    :doc:`bugprone-multi-level-implicit-pointer-conversion <bugprone/multi-level-implicit-pointer-conversion>`,
    :doc:`bugprone-multiple-new-in-one-expression <bugprone/multiple-new-in-one-expression>`,
    :doc:`bugprone-multiple-statement-macro <bugprone/multiple-statement-macro>`,
@@ -119,7 +119,6 @@ Clang-Tidy Checks
    :doc:`bugprone-posix-return <bugprone/posix-return>`, "Yes"
    :doc:`bugprone-redundant-branch-condition <bugprone/redundant-branch-condition>`, "Yes"
    :doc:`bugprone-reserved-identifier <bugprone/reserved-identifier>`, "Yes"
-   :doc:`bugprone-shared-pointer-contents-move <bugprone/shared-pointer-contents-move>`, "Yes"
    :doc:`bugprone-shared-ptr-array-mismatch <bugprone/shared-ptr-array-mismatch>`, "Yes"
    :doc:`bugprone-signal-handler <bugprone/signal-handler>`,
    :doc:`bugprone-signed-char-misuse <bugprone/signed-char-misuse>`,
diff --git a/clang-tools-extra/test/clang-tidy/checkers/bugprone/move-shared-pointer-contents.cpp b/clang-tools-extra/test/clang-tidy/checkers/bugprone/move-shared-pointer-contents.cpp
index 5f1980213c6be0..d4cc75cdc2f939 100644
--- a/clang-tools-extra/test/clang-tidy/checkers/bugprone/move-shared-pointer-contents.cpp
+++ b/clang-tools-extra/test/clang-tidy/checkers/bugprone/move-shared-pointer-contents.cpp
@@ -1,4 +1,4 @@
-// RUN: %check_clang_tidy %s bugprone-move-shared-pointer-contents %t -- -config="{CheckOptions: {bugprone-move-shared-pointer-contents.SharedPointerClasses: 'std::shared_ptr;my::OtherSharedPtr;'}}"
+// RUN: %check_clang_tidy %s bugprone-move-shared-pointer-contents %t -- -config="{CheckOptions: {bugprone-move-shared-pointer-contents.SharedPointerClasses: '::std::shared_ptr;my::OtherSharedPtr;'}}"
 
 // Some dummy definitions we'll need.
 
@@ -31,45 +31,94 @@ struct shared_ptr {
 namespace my {
 template <typename T>
 using OtherSharedPtr = std::shared_ptr<T>;
+// Not part of the config.
+template <typename T>
+using YetAnotherSharedPtr = T*;
 }  // namespace my
 
+struct Nontrivial {
+  int x;
+  Nontrivial() : x(2) {}
+  Nontrivial(Nontrivial& other) { x = other.x; }
+  Nontrivial(Nontrivial&& other) { x = std::move(other.x); }
+  Nontrivial& operator=(Nontrivial& other) { x = other.x; }
+  Nontrivial& operator=(Nontrivial&& other) { x = std::move(other.x); }
+};
+
+// Test cases begin here.
+
 void correct() {
-  std::shared_ptr<int> p;
-  int x = *std::move(p);
+  std::shared_ptr<Nontrivial> p;
+  Nontrivial x = *std::move(p);
 }
 
 void simpleFinding() {
-  std::shared_ptr<int> p;
-  int y = std::move(*p);
-  // CHECK-FIXES: *std::move(p)
+  std::shared_ptr<Nontrivial> p;
+  Nontrivial y = std::move(*p);
 }
-// CHECK-MESSAGES: :[[@LINE-3]]:11: warning: don't move the contents out of a shared pointer, as other accessors expect them to remain in a determinate state [bugprone-move-shared-pointer-contents]
+// CHECK-MESSAGES: :[[@LINE-2]]:18: warning: don't move the contents out of a shared pointer, as other accessors expect them to remain in a determinate state [bugprone-move-shared-pointer-contents]
 
 void aliasedType() {
-  using int_ptr = std::shared_ptr<int>;
-  int_ptr p;
-  int x = std::move(*p);
-  // CHECK-FIXES: *std::move(p)
+  using nontrivial_ptr = std::shared_ptr<Nontrivial>;
+  nontrivial_ptr p;
+  Nontrivial x = std::move(*p);
 }
-// CHECK-MESSAGES: :[[@LINE-3]]:11: warning: don't move the contents out of a shared pointer, as other accessors expect them to remain in a determinate state [bugprone-move-shared-pointer-contents]
+// CHECK-MESSAGES: :[[@LINE-2]]:18: warning: don't move the contents out of a shared pointer, as other accessors expect them to remain in a determinate state [bugprone-move-shared-pointer-contents]
 
 void configWorks() {
-  my::OtherSharedPtr<int> p;
-  int x = std::move(*p);
-  // CHECK-FIXES: *std::move(p)
+  my::OtherSharedPtr<Nontrivial> p;
+  Nontrivial x = std::move(*p);
+}
+// CHECK-MESSAGES: :[[@LINE-2]]:18: warning: don't move the contents out of a shared pointer, as other accessors expect them to remain in a determinate state [bugprone-move-shared-pointer-contents]
+
+void sharedEsquePointerNotInConfig() {
+  my::YetAnotherSharedPtr<Nontrivial> p;
+  Nontrivial x = std::move(*p);
 }
-// CHECK-MESSAGES: :[[@LINE-3]]:11: warning: don't move the contents out of a shared pointer, as other accessors expect them to remain in a determinate state [bugprone-move-shared-pointer-contents]
 
 void multiStars() {
-  std::shared_ptr<int> p;
-  int x = 2 * std::move(*p) * 3;
-  // CHECK-FIXES: *std::move(p)
+  std::shared_ptr<Nontrivial> p;
+  int x = 2 * std::move(*p).x * 3;
 }
-// CHECK-MESSAGES: :[[@LINE-3]]:15: warning: don't move the contents out of a shared pointer, as other accessors expect them to remain in a determinate state [bugprone-move-shared-pointer-contents]
+// CHECK-MESSAGES: :[[@LINE-2]]:15: warning: don't move the contents out of a shared pointer, as other accessors expect them to remain in a determinate state [bugprone-move-shared-pointer-contents]
 
-// This case should be caught, but isn't.
 template <typename T>
 void unresolved() {
   std::shared_ptr<T> p;
-  T x = 2 * std::move(*p) * 3;
+  int x = 2 * std::move(*p).x * 3;
+}
+// CHECK-MESSAGES: :[[@LINE-2]]:15: warning: don't move the contents out of a shared pointer, as other accessors expect them to remain in a determinate state [bugprone-move-shared-pointer-contents]
+
+template <typename T>
+void unresolvedAsAReference() {
+  std::shared_ptr<T> p;
+  std::shared_ptr<T>& q = p;
+  int x = 2 * std::move(*q).x * 3;
+}
+// CHECK-MESSAGES: :[[@LINE-2]]:15: warning: don't move the contents out of a shared pointer, as other accessors expect them to remain in a determinate state [bugprone-move-shared-pointer-contents]
+
+template <typename T>
+void unresolvedAlias() {
+  my::OtherSharedPtr<T> p;
+  Nontrivial x = std::move(*p);
+}
+// CHECK-MESSAGES: :[[@LINE-2]]:18: warning: don't move the contents out of a shared pointer, as other accessors expect them to remain in a determinate state [bugprone-move-shared-pointer-contents]
+
+void dereferencedGet() {
+  std::shared_ptr<Nontrivial> p;
+  Nontrivial x = std::move(*p.get());
+}
+// CHECK-MESSAGES: :[[@LINE-2]]:18: warning: don't move the contents out of a shared pointer, as other accessors expect them to remain in a determinate state [bugprone-move-shared-pointer-contents]
+
+template <typename T>
+void unresolvedDereferencedGet() {
+  std::shared_ptr<T> p;
+  T x = std::move(*p.get());
+}
+// CHECK-MESSAGES: :[[@LINE-2]]:9: warning: don't move the contents out of a shared pointer, as other accessors expect them to remain in a determinate state [bugprone-move-shared-pointer-contents]
+
+template <typename T>
+void rawPointer() {
+  T* p;
+  T x = std::move(*p);
 }