[clang] Reapply "[Analyzer][CFG] Correctly handle rebuilt default arg and default init expression" (PR #127338)

[via cfe-commits]

================
@@ -2464,6 +2464,10 @@ CFGBlock 
*CFGBuilder::VisitCXXDefaultInitExpr(CXXDefaultInitExpr *Init,
       autoCreateBlock();
       appendStmt(Block, Init);
     }
+
+    // Unlike CXXDefaultArgExpr::getExpr stripped off the top level FullExpr 
and
+    // ConstantExpr, CXXDefaultInitExpr::getExpr does not do this, so we don't
+    // need to ignore ParenExprs, because the top level will not be a 
ParenExpr.
----------------
yronglin wrote:

Oh sorry, I missed some changes.

https://github.com/llvm/llvm-project/pull/127338
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