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

[Timm Baeder via cfe-commits]

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

can you also add another set of RUN lines to this file with `-fexperimental-new-constant-interpreter?

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