[PATCH] D84129: [ELF] -r: rewrite SHT_GROUP content if some members are combined or discarded

[Fangrui Song via Phabricator via llvm-commits]

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

- If two group members are combined, we should leave just one index in the SHT_GROUP content.
- If a group member is discarded (/DISCARD/ or upcoming -r --gc-sections combination), we should drop its index in the SHT_GROUP content.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D84129

Files:
  lld/ELF/InputSection.cpp
  lld/ELF/OutputSections.cpp
  lld/test/ELF/relocatable-comdat.s

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