[PATCH] D131076: [clang][modules] Don't depend on sharing FileManager during module build

[Ben Langmuir via Phabricator via cfe-commits]

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Sharing the FileManager between the importer and the module build should only be an optimization. Add a cc1 option -fno-modules-share-filemanager to allow us to test this. Fix the path to modulemap files, which previously depended on the shared FileManager when using path mapped to an external file in a VFS.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D131076

Files:
  clang/include/clang/Driver/Options.td
  clang/include/clang/Frontend/FrontendOptions.h
  clang/lib/Frontend/CompilerInstance.cpp
  clang/test/ClangScanDeps/modulemap-via-vfs.m
  clang/test/Modules/submodule-in-private-mmap-vfs.m
  clang/test/VFS/module-import.m

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