[clang] [analyzer] Implemented the DanglingPtrDeref checker to detect use-after-scope lifetime errors (PR #209278)

[Donát Nagy via cfe-commits]

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@@ -806,6 +806,11 @@ def UseAfterLifetimeEnd : Checker<"UseAfterLifetimeEnd">,
   Dependencies<[LifetimeModeling]>,
   Documentation<NotDocumented>;
 
+def ReportDanglingPtrDeref : Checker<"ReportDanglingPtrDeref">,
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NagyDonat wrote:

> Let's address this in a followup commit.

Renaming checkers is somewhat disruptive, even if it is just an alpha checker. I would prefer merging this with the right name if possible.

> I think `DanglingPtrDerefChecker` or just `DanglingPtrDeref` aligns better with the naming of existing checkers.

The suffix `Checker` is also redundant, even more so than `Report`. Unfortunately it it is used by a few checkers, but we shouldn't introduce new checkers that use it.

(By the way it is normal that the name of the _class that implements the checker_ is suffixed with `Checker`: e.g. `security.ArrayBound` is implemented in `class ArrayBoundChecker`.)

https://github.com/llvm/llvm-project/pull/209278