[PATCH] D139163: Utils: Add utility pass to lower ifuncs

[Matt Arsenault via Phabricator via llvm-commits]

arsenm added a comment.

In D139163#4014314 <https://reviews.llvm.org/D139163#4014314>, @MaskRay wrote:

> You previously said "OpenCL forbids function pointers. If you use target_clones in clang, there's no function pointer in the source and the compiler takes care of everything. I want to patch up subtarget specific implementations of builtin functions. It's not for end users"
>
> I take it that if `target_clones` supports non-ifunc use, this patch is not needed. It seems that  `target_clones` indeed works without ifunc (inefficient now, but can be improved), so may I assume that this is not needed?

This is still a way for llvm-reduce to break this into something else it understands how to reduce. This patch does not try to run this anywhere, but adds the testing for the situations for the reduction


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  https://reviews.llvm.org/D139163/new/

https://reviews.llvm.org/D139163