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

[Yaxun Liu via Phabricator via cfe-commits]

yaxunl created this revision.
yaxunl added reviewers: rjmccall, ABataev.

Move function emitDeferredDiags from Sema to DeferredDiagsEmitter since it
is only used by DeferredDiagsEmitter.

Also record number of diagnostics triggered by each function and skip a function
if it is known not to emit any diagnostics.


https://reviews.llvm.org/D77028

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

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