[PATCH] D89749: SourceManager: Don't allocate an SLocEntry until it's loaded

[Duncan P. N. Exon Smith via Phabricator via cfe-commits]

dexonsmith updated this revision to Diff 300722.
dexonsmith edited the summary of this revision.
dexonsmith added a comment.

Made the planned changes to SourceManager, wrapping the index in `LoadedSLocEntryIndex` which acts like an `Optional<unsigned>` (but still using 0 for a sentinel to allow zero-initialization).


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D89749/new/

https://reviews.llvm.org/D89749

Files:
  clang/include/clang/Basic/SourceManager.h
  clang/lib/Basic/SourceManager.cpp

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