[PATCH] D52620: Added Support for StatOnly Files in VFS.

[Ilya Biryukov via Phabricator via cfe-commits]

ilya-biryukov added a comment.

> I would call it a requirement instead of an assumption. The replay must be exactly the same (even the file stats and reads). If Clang reads the file in replay which was only stat()ed during compilation, it indicates non-determinism or something wrong (in clang or FS).
>  We currently deal with such files by adding empty buffers for them based on this assumption/requirement only.

Does adding a flag to clang to skip the module inputs checks seems feasible/reasonable? +1 to Sam's comments, the mode for FS that has the file sizes, but not the file contents seems too specific for the use-case at hand, does not fit well into the design.


Repository:
  rC Clang

https://reviews.llvm.org/D52620