[PATCH] D96838: Add GNU attribute 'retain'

[Fangrui Song via Phabricator via cfe-commits]

MaskRay updated this revision to Diff 325499.
MaskRay added a comment.

Add tests that   Sema discarded unused functions are warned (nor different from the case without 'retain')


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D96838/new/

https://reviews.llvm.org/D96838

Files:
  clang/include/clang/Basic/Attr.td
  clang/include/clang/Basic/AttrDocs.td
  clang/lib/CodeGen/CGDecl.cpp
  clang/lib/CodeGen/CodeGenModule.cpp
  clang/lib/CodeGen/CodeGenModule.h
  clang/lib/Sema/SemaDecl.cpp
  clang/test/CodeGen/attr-retain.c
  clang/test/CodeGenCXX/attr-retain.cpp
  clang/test/CodeGenCXX/extern-c.cpp
  clang/test/Sema/attr-retain.c

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