[all-commits] [llvm/llvm-project] 8ce375: [lld-macho] Set FinalDefinitionInLinkageUnit on mo...

[Jez Ng via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 8ce3750ff62d68e7428a828530b9b6a8cc93e813
      https://github.com/llvm/llvm-project/commit/8ce3750ff62d68e7428a828530b9b6a8cc93e813
  Author: Jez Ng <jezng at fb.com>
  Date:   2022-03-15 (Tue, 15 Mar 2022)

  Changed paths:
    M lld/MachO/LTO.cpp
    A lld/test/MachO/lto-final-definition.ll
    M lld/test/MachO/lto-internalize.ll

  Log Message:
  -----------
  [lld-macho] Set FinalDefinitionInLinkageUnit on most LTO externs

Since Mach-O has a two-level namespace (unlike ELF), we can usually set
this property to true.

(I believe this setting is only available in the new LTO backend, so I
can't really use ld64 / libLTO's behavior as a reference here... I'm
just doing what I think is correct.)

See {D119294} for the work done to calculate the `interposable` used in
this diff.

Reviewed By: MaskRay

Differential Revision: https://reviews.llvm.org/D119506