[all-commits] [llvm/llvm-project] 588987: [llvm][vfs] Make vfs::FileSystem::exists() virtual...

Artem Chikin via All-commits all-commits at lists.llvm.org
Fri Apr 12 13:49:22 PDT 2024


  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 588987405a979f724ab0aa7ad788cc5e87af3649
      https://github.com/llvm/llvm-project/commit/588987405a979f724ab0aa7ad788cc5e87af3649
  Author: Artem Chikin <achikin at apple.com>
  Date:   2024-04-12 (Fri, 12 Apr 2024)

  Changed paths:
    M llvm/include/llvm/Support/VirtualFileSystem.h
    M llvm/lib/Support/VirtualFileSystem.cpp
    M llvm/unittests/Support/VirtualFileSystemTest.cpp

  Log Message:
  -----------
  [llvm][vfs] Make vfs::FileSystem::exists() virtual NFC (#88575)

Allow a `vfs::FileSystem` to provide a more efficient implementation of
`exists()` if they are able to. The existing `FileSystem`
implementations continue to default to using `status()` except that
overlay, proxy, and redirecting filesystems are taught to forward calls
to `exists()` correctly to their wrapped/external filesystem.

Co-authored-by: Ben Langmuir <blangmuir at apple.com>



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