[clang] [llvm] [analyzer] Implemented a base of detecing lifetimebound annotation (PR #200145)

[Benedek Kaibas via cfe-commits]

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@@ -3,25 +3,25 @@
 // RUN: %clang_analyze_cc1 -analyzer-checker=alpha.cplusplus.LifetimeAnnotations \
 // RUN:   -analyzer-config c++-container-inlining=false -verify %s
 
-void clang_analyzer_dump(...);
+struct A {};
 
-// These are the cases when the result of function calls are MemRegions.
+void clang_analyzer_lifetime_bound(int*);
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benedekaibas wrote:

The variadic function declaration would be cleaner, but I implemented the `clang_analyzer_lifetime_bound` helper function via `CallDescriptionMap` which does need the specific type declared otherwise the function does not emit the warning. I have looked at how `clang_analyzer_dump` is implemented and it works as a variadic function because the `FnCheck Handler`'s logic uses StringSwitch. It is possible to rewrite the `CallDescriptionMap` to what `ExprInspection` checker has in the long term.

https://github.com/llvm/llvm-project/pull/200145