[PATCH] D75536: Add support for --unique option

[Dave Bozier via Phabricator via llvm-commits]

davidb created this revision.
Herald added subscribers: llvm-commits, MaskRay, arichardson, emaste.
Herald added a reviewer: espindola.
Herald added a project: LLVM.

Places orphan sections into a unique output section. This prevents the merging of orphan sections of the same name. Matches behaviour of gnu LD option --unique[=SECTION], with the exception I haven't added the wildcard SECTION support.

Motivated user case shown in the test has 2 local symbols as they would appear if C++ source has been compiled with -ffunction-sections. The merging of these sections in the case of a partial link (-r) inhibits deadstripping.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D75536

Files:
  lld/ELF/Config.h
  lld/ELF/Driver.cpp
  lld/ELF/LinkerScript.cpp
  lld/ELF/Options.td
  lld/test/ELF/Inputs/unique-orphans.s
  lld/test/ELF/unique-orphans.s

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