[clang] [clang] Extend lifetimebound analysis to detect within-initializer assignments between pointer-like objects. (PR #97473)

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<!--LLVM CODE FORMAT COMMENT: {clang-format}-->


:warning: C/C++ code formatter, clang-format found issues in your code. 
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``````````bash
git-clang-format --diff c3079ffcd34e8ee2faaf7576a69a49acc1a3653f 
e1bd3e3d813ecce1e93957c3cbe26a8c3182abd6 -- 
clang/lib/Sema/CheckExprLifetime.cpp 
clang/test/Sema/warn-lifetime-analysis-nocfg.cpp
``````````

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View the diff from clang-format here.
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``````````diff
diff --git a/clang/lib/Sema/CheckExprLifetime.cpp 
b/clang/lib/Sema/CheckExprLifetime.cpp
index f2fd3849b0..d30d17d461 100644
--- a/clang/lib/Sema/CheckExprLifetime.cpp
+++ b/clang/lib/Sema/CheckExprLifetime.cpp
@@ -325,7 +325,7 @@ static bool shouldTrackFirstArgument(const FunctionDecl 
*FD) {
 // Assume that all assignment operators with a "normal" return type return
 // *this, that is, an lvalue reference that is the same type as the implicit
 // object parameter (or the LHS for a non-member operator$=).
-static bool isNormalAssignmentOperator(const FunctionDecl* FD) {
+static bool isNormalAssignmentOperator(const FunctionDecl *FD) {
   if (!FD)
     return false;
   OverloadedOperatorKind OO = FD->getDeclName().getCXXOverloadedOperator();
@@ -346,7 +346,6 @@ static bool isNormalAssignmentOperator(const FunctionDecl* 
FD) {
   return false;
 }
 
-
 static void handleGslAnnotatedTypes(IndirectLocalPath &Path, Expr *Call,
                                     LocalVisitor Visit) {
   auto VisitPointerArg = [&](const Decl *D, Expr *Arg, bool Value) {
@@ -441,7 +440,8 @@ static bool implicitObjectParamIsLifetimeBound(const 
FunctionDecl *FD) {
       return true;
   }
 
-  // Track the implicit object parameter if this is a normal assignment 
operator.
+  // Track the implicit object parameter if this is a normal assignment
+  // operator.
   return isNormalAssignmentOperator(FD);
 }
 

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https://github.com/llvm/llvm-project/pull/97473
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