Commit 5a77200b3b54f9e4ba8523a33fa73e2a0a6347ac
2023-02-08T17:10:28
Metal: Implement parallel shader linking. Update the Metal library cache to be thread safe. Change absl::flat_hash_map back to std::unordered_map because the value types now contain a mutex which must not move. Only generate async compilation tasks for shaders that were not already compiled and in the cache. Collapse some of the link methods in ProgramMtl that only had one call site. All linking is now done in ProgramMtl::link and ProgramMtl::load. Support disabling parallel linking using the new enableParallelMtlLibraryCompilation feature. Bug: chromium:1385510 Change-Id: I71ba71a34d994066729df7e4170911f88c89de4a Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4234153 Reviewed-by: Quyen Le <lehoangquyen@chromium.org> Reviewed-by: Jonah Ryan-Davis <jonahr@google.com> Commit-Queue: Geoff Lang <geofflang@chromium.org>