[clang] [Clang] Fix crash in alignment builtins with null pointers (PR #224549)

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@@ -115,6 +115,12 @@ void constant_expression(int x) {
   _Static_assert(!__builtin_is_aligned(256, 512ULL), "");
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keepyixiao wrote:

Thanks for the suggestion! I have updated the test file with an additional
set of RUN lines using `-fexperimental-new-constant-interpreter`.

I appreciate your review and guidance.

https://github.com/llvm/llvm-project/pull/224549