[PATCH] D41005: Reuse preamble even if an unsaved file does not exist

[Cameron via Phabricator via cfe-commits]

cameron314 added a comment.

@yvvan: The clang frontend tests (`PCHPreambleTest` and friends) are disabled on Windows in the makefile (I think because the VFS tests depend on linux-like paths). So running the tests on Windows without failures is encouraging but not the whole story.


Repository:
  rC Clang

https://reviews.llvm.org/D41005