[PATCH] D57659: [Sema] SequenceChecker: Add some comments + related small NFCs in preparation of the following patches

[Bruno Ricci via Phabricator via cfe-commits]

riccibruno updated this revision to Diff 188048.
riccibruno added a comment.

Rebased.


Repository:
  rC Clang

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D57659/new/

https://reviews.llvm.org/D57659

Files:
  lib/Sema/SemaChecking.cpp

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