[PATCH] D77028: [NFC] Refactor DeferredDiagsEmitter and skip redundant visit

[Yaxun Liu via Phabricator via cfe-commits]

yaxunl updated this revision to Diff 254407.
yaxunl added a comment.

rebase


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D77028/new/

https://reviews.llvm.org/D77028

Files:
  clang/include/clang/Sema/Sema.h
  clang/lib/Sema/Sema.cpp

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