[clang] [analyzer] Use AllocaRegion in MallocChecker (PR #72402)

[Balazs Benics via cfe-commits]

=?utf-8?q?Donát?= Nagy <donat.nagy at ericsson.com>,
=?utf-8?q?Donát?= Nagy <donat.nagy at ericsson.com>
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In-Reply-To: <llvm.org/llvm/llvm-project/pull/72402 at github.com>


https://github.com/steakhal approved this pull request.

Overall, I'm in favor of this change.
On the other hand, I'd urge for not to regress on the diagnostics.
To me, `alloca` is like a VLA; which is prone to misuses, thus the edge-cases count there (esp. if tainted).

https://github.com/llvm/llvm-project/pull/72402