[llvm] [IR][DSE] Support non-malloc functions in malloc+memset->calloc fold (PR #138299)

[Augie Fackler via llvm-commits]

durin42 wrote:

This seems fine to me - it's a little bit of a bummer there's no way to just find the matching `zeroed` variant of a function without having to add the attribute, but I can't think of anything.

https://github.com/llvm/llvm-project/pull/138299