[all-commits] [llvm/llvm-project] e3b105: Make multiversioning work with internal linkage

[Erich Keane via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: e3b10525b489b604d6a1e540be78bda80afb5868
      https://github.com/llvm/llvm-project/commit/e3b10525b489b604d6a1e540be78bda80afb5868
  Author: Erich Keane <erich.keane at intel.com>
  Date:   2021-09-17 (Fri, 17 Sep 2021)

  Changed paths:
    M clang/lib/CodeGen/CodeGenModule.cpp
    M clang/test/CodeGen/unique-internal-linkage-names.cpp
    A clang/test/CodeGenCXX/multi-versioning-internal-linkage.cpp

  Log Message:
  -----------
  Make multiversioning work with internal linkage

We previously made all multiversioning resolvers/ifuncs have weak
ODR linkage in IR, since we NEED to emit the whole resolver every time
we see a call, but it is not necessarily the place where all the
definitions live.

HOWEVER, when doing so, we neglected the case where the versions have
internal linkage.  This patch ensures we do this, so you don't get weird
behavior with static functions.