Merge branch 'llvm:main' into gh-101657

Author: Lakshmi-Surekha

clang-tools-extra/clang-tidy/ClangTidy.cpp

@@ -672,6 +672,18 @@ getAllChecksAndOptions(bool AllowEnablingAnalyzerAlphaCheckers) {
     Buffer.append(AnalyzerCheck);
     Result.Names.insert(Buffer);
   }
+  for (std::string OptionName : {
+#define GET_CHECKER_OPTIONS
+#define CHECKER_OPTION(TYPE, CHECKER, OPTION_NAME, DESCRIPTION, DEFAULT,       \
+                       RELEASE, HIDDEN)                                        \
+  Twine(AnalyzerCheckNamePrefix).concat(CHECKER ":" OPTION_NAME).str(),
+
+#include "clang/StaticAnalyzer/Checkers/Checkers.inc"
+#undef CHECKER_OPTION
+#undef GET_CHECKER_OPTIONS
+       }) {
+    Result.Options.insert(OptionName);
+  }
 #endif // CLANG_TIDY_ENABLE_STATIC_ANALYZER
 
   Context.setOptionsCollector(&Result.Options);

clang-tools-extra/clang-tidy/bugprone/BitwisePointerCastCheck.cpp

@@ -0,0 +1,46 @@
+//===--- BitwisePointerCastCheck.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 "BitwisePointerCastCheck.h"
+#include "clang/ASTMatchers/ASTMatchFinder.h"
+
+using namespace clang::ast_matchers;
+
+namespace clang::tidy::bugprone {
+
+void BitwisePointerCastCheck::registerMatchers(MatchFinder *Finder) {
+  if (getLangOpts().CPlusPlus20) {
+    auto IsPointerType = refersToType(qualType(isAnyPointer()));
+    Finder->addMatcher(callExpr(hasDeclaration(functionDecl(allOf(
+                                    hasName("::std::bit_cast"),
+                                    hasTemplateArgument(0, IsPointerType),
+                                    hasTemplateArgument(1, IsPointerType)))))
+                           .bind("bit_cast"),
+                       this);
+  }
+
+  auto IsDoublePointerType =
+      hasType(qualType(pointsTo(qualType(isAnyPointer()))));
+  Finder->addMatcher(callExpr(hasArgument(0, IsDoublePointerType),
+                              hasArgument(1, IsDoublePointerType),
+                              hasDeclaration(functionDecl(hasName("::memcpy"))))
+                         .bind("memcpy"),
+                     this);
+}
+
+void BitwisePointerCastCheck::check(const MatchFinder::MatchResult &Result) {
+  if (const auto *Call = Result.Nodes.getNodeAs<CallExpr>("bit_cast"))
+    diag(Call->getBeginLoc(),
+         "do not use 'std::bit_cast' to cast between pointers")
+        << Call->getSourceRange();
+  else if (const auto *Call = Result.Nodes.getNodeAs<CallExpr>("memcpy"))
+    diag(Call->getBeginLoc(), "do not use 'memcpy' to cast between pointers")
+        << Call->getSourceRange();
+}
+
+} // namespace clang::tidy::bugprone

clang-tools-extra/clang-tidy/bugprone/BitwisePointerCastCheck.h

@@ -0,0 +1,34 @@
+//===--- BitwisePointerCastCheck.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_BITWISEPOINTERCASTCHECK_H
+#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_BITWISEPOINTERCASTCHECK_H
+
+#include "../ClangTidyCheck.h"
+
+namespace clang::tidy::bugprone {
+
+/// Warns about code that tries to cast between pointers by means of
+/// ``std::bit_cast`` or ``memcpy``.
+///
+/// For the user-facing documentation see:
+/// http://clang.llvm.org/extra/clang-tidy/checks/bugprone/bitwise-pointer-cast.html
+class BitwisePointerCastCheck : public ClangTidyCheck {
+public:
+  BitwisePointerCastCheck(StringRef Name, ClangTidyContext *Context)
+      : ClangTidyCheck(Name, Context) {}
+  void registerMatchers(ast_matchers::MatchFinder *Finder) override;
+  void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
+  bool isLanguageVersionSupported(const LangOptions &LangOpts) const override {
+    return LangOpts.CPlusPlus;
+  }
+};
+
+} // namespace clang::tidy::bugprone
+
+#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_BITWISEPOINTERCASTCHECK_H

clang-tools-extra/clang-tidy/bugprone/BugproneTidyModule.cpp

@@ -14,6 +14,7 @@
 #include "AssertSideEffectCheck.h"
 #include "AssignmentInIfConditionCheck.h"
 #include "BadSignalToKillThreadCheck.h"
+#include "BitwisePointerCastCheck.h"
 #include "BoolPointerImplicitConversionCheck.h"
 #include "BranchCloneCheck.h"
 #include "CastingThroughVoidCheck.h"
@@ -109,6 +110,8 @@ class BugproneModule : public ClangTidyModule {
         "bugprone-assignment-in-if-condition");
     CheckFactories.registerCheck<BadSignalToKillThreadCheck>(
         "bugprone-bad-signal-to-kill-thread");
+    CheckFactories.registerCheck<BitwisePointerCastCheck>(
+        "bugprone-bitwise-pointer-cast");
     CheckFactories.registerCheck<BoolPointerImplicitConversionCheck>(
         "bugprone-bool-pointer-implicit-conversion");
     CheckFactories.registerCheck<BranchCloneCheck>("bugprone-branch-clone");

clang-tools-extra/clang-tidy/bugprone/CMakeLists.txt

@@ -8,6 +8,7 @@ add_clang_library(clangTidyBugproneModule
   AssertSideEffectCheck.cpp
   AssignmentInIfConditionCheck.cpp
   BadSignalToKillThreadCheck.cpp
+  BitwisePointerCastCheck.cpp
   BoolPointerImplicitConversionCheck.cpp
   BranchCloneCheck.cpp
   BugproneTidyModule.cpp

clang-tools-extra/clang-tidy/modernize/LoopConvertUtils.cpp

@@ -777,7 +777,7 @@ bool ForLoopIndexUseVisitor::TraverseLambdaCapture(LambdaExpr *LE,
                                                    const LambdaCapture *C,
                                                    Expr *Init) {
   if (C->capturesVariable()) {
-    const ValueDecl *VDecl = C->getCapturedVar();
+    ValueDecl *VDecl = C->getCapturedVar();
     if (areSameVariable(IndexVar, VDecl)) {
       // FIXME: if the index is captured, it will count as an usage and the
       // alias (if any) won't work, because it is only used in case of having
@@ -787,6 +787,8 @@ bool ForLoopIndexUseVisitor::TraverseLambdaCapture(LambdaExpr *LE,
                                                        : Usage::UK_CaptureByRef,
                      C->getLocation()));
     }
+    if (VDecl->isInitCapture())
+      TraverseStmtImpl(cast<VarDecl>(VDecl)->getInit());
   }
   return VisitorBase::TraverseLambdaCapture(LE, C, Init);
 }
@@ -816,6 +818,17 @@ bool ForLoopIndexUseVisitor::VisitDeclStmt(DeclStmt *S) {
   return true;
 }
 
+bool ForLoopIndexUseVisitor::TraverseStmtImpl(Stmt *S) {
+  // All this pointer swapping is a mechanism for tracking immediate parentage
+  // of Stmts.
+  const Stmt *OldNextParent = NextStmtParent;
+  CurrStmtParent = NextStmtParent;
+  NextStmtParent = S;
+  bool Result = VisitorBase::TraverseStmt(S);
+  NextStmtParent = OldNextParent;
+  return Result;
+}
+
 bool ForLoopIndexUseVisitor::TraverseStmt(Stmt *S) {
   // If this is an initialization expression for a lambda capture, prune the
   // traversal so that we don't end up diagnosing the contained DeclRefExpr as
@@ -828,15 +841,7 @@ bool ForLoopIndexUseVisitor::TraverseStmt(Stmt *S) {
       return true;
     }
   }
-
-  // All this pointer swapping is a mechanism for tracking immediate parentage
-  // of Stmts.
-  const Stmt *OldNextParent = NextStmtParent;
-  CurrStmtParent = NextStmtParent;
-  NextStmtParent = S;
-  bool Result = VisitorBase::TraverseStmt(S);
-  NextStmtParent = OldNextParent;
-  return Result;
+  return TraverseStmtImpl(S);
 }
 
 std::string VariableNamer::createIndexName() {

clang-tools-extra/clang-tidy/modernize/LoopConvertUtils.h

@@ -354,6 +354,8 @@ class ForLoopIndexUseVisitor
   bool VisitDeclStmt(DeclStmt *S);
   bool TraverseStmt(Stmt *S);
 
+  bool TraverseStmtImpl(Stmt *S);
+
   /// Add an expression to the list of expressions on which the container
   /// expression depends.
   void addComponent(const Expr *E);

clang-tools-extra/clangd/refactor/tweaks/CMakeLists.txt

@@ -29,6 +29,7 @@ add_clang_library(clangDaemonTweaks OBJECT
   RemoveUsingNamespace.cpp
   ScopifyEnum.cpp
   SpecialMembers.cpp
+  SwapBinaryOperands.cpp
   SwapIfBranches.cpp
 
   LINK_LIBS