[PATCH] D89429: clang/Basic: Replace SourceManager::getMemoryBufferForFile, NFC

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

dexonsmith created this revision.
dexonsmith added a reviewer: arphaman.
Herald added a subscriber: ributzka.
dexonsmith requested review of this revision.

Replace `SourceManager::getMemoryBufferForFile`, which returned a
dereferenceable `MemoryBuffer*` and had a `bool*Invalid` out parameter,
with `getMemoryBufferForFileOrNone` (returning
`Optional<MemoryBufferRef>`) and `getMemoryBufferForFileOrFake`
(returning `MemoryBufferRef`).


https://reviews.llvm.org/D89429

Files:
  clang/include/clang/Basic/SourceManager.h
  clang/include/clang/Frontend/PrecompiledPreamble.h
  clang/lib/Basic/SourceManager.cpp
  clang/lib/Frontend/PrecompiledPreamble.cpp
  clang/lib/Lex/Preprocessor.cpp

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