[LLD] [COFF] Mark the symbol _tls_used as a GC root (#71336)

This is necessary if the object file containing _tls_used is built with
-fdata-sections; if this symbol is present, lld is going to include
references to it in the PE header, in the TLS_TABLE data directory.

Therefore, treat the symbol as a GC root, i.e. retain it (and whatever
other symbols the section chunk references) when doing doing GC
(/opt:ref), if the symbol is present.

GitOrigin-RevId: 303370e87166305248122a03c9913fde02156f99
2 files changed
tree: 08817dbf0a153c76e4b07c59ed379927b032634b
  1. cmake/
  2. COFF/
  3. Common/
  4. docs/
  5. ELF/
  6. include/
  7. MachO/
  8. MinGW/
  9. test/
  10. tools/
  11. unittests/
  12. utils/
  13. wasm/
  14. .clang-format
  15. .clang-tidy
  16. .gitignore
  17. CMakeLists.txt
  18. CODE_OWNERS.TXT
  19. LICENSE.TXT
  20. README.md
README.md

LLVM Linker (lld)

This directory and its subdirectories contain source code for the LLVM Linker, a modular cross platform linker which is built as part of the LLVM compiler infrastructure project.

lld is open source software. You may freely distribute it under the terms of the license agreement found in LICENSE.txt.

Benchmarking

In order to make sure various developers can evaluate patches over the same tests, we create a collection of self contained programs.

It is hosted at https://s3-us-west-2.amazonaws.com/linker-tests/lld-speed-test.tar.xz

The current sha256 is 10eec685463d5a8bbf08d77f4ca96282161d396c65bd97dc99dbde644a31610f.