[PATCH] D89913: SourceManager: Encapsulate line number mapping into SrcMgr::LineOffsetMapping

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

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

Put the guts of `ComputeLineNumbers` into `LineOffsetMapping::get` and
`LineOffsetMapping::LineOffsetMapping`.  As a drive-by, store the number
of lines directly in the bump-ptr-allocated array.


https://reviews.llvm.org/D89913

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

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