[PATCH] D52871: [clangd] Use canonical declarations in ReferenceFinder.

[Haojian Wu via Phabricator via cfe-commits]

hokein created this revision.
hokein added a reviewer: sammccall.
Herald added subscribers: kadircet, arphaman, jkorous, MaskRay, ioeric, ilya-biryukov.

handleDeclOccurrencce reports a canonical declartion, so stick to use
canonical declarations to determine whether a declaration is in the
target set.

Also fix a previous ref test which misses a matched label (it fails without this
patch).


Repository:
  rCTE Clang Tools Extra

https://reviews.llvm.org/D52871

Files:
  clangd/XRefs.cpp
  unittests/clangd/XRefsTests.cpp

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