[llvm] [ThinLTO] Don't mark calloc function dead (PR #72673)

[Mingming Liu via llvm-commits]

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minglotus-6 wrote:

nit: the test case could be simplified. Same for the other one.

Usually I would remove the unneeded parameter attributes and function attributes. In this test case, the type metadata doesn't seem to be relevant either.

https://github.com/llvm/llvm-project/pull/72673