[PATCH] D108479: [Clang] Add __builtin_addressof_nocfi

[John McCall via Phabricator via cfe-commits]

rjmccall added a comment.

I don't know for certain, but I would guess that the kernel wants to get the address of the first instruction in the function for the purposes of some sort of later PC-based table lookup, which means that yes, it probably *does* need to bypass descriptors on CHERI / Itanium / whatever else.

What we're trying to do here is *avoid* a can of worms by clearly understanding what the desired semantics are, rather than adding a builtin with the semantics of "ignore exactly the one complication that we ran into first".


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D108479/new/

https://reviews.llvm.org/D108479