[PATCH] D49783: [clangd] Do not rebuild AST if inputs have not changed

[Ilya Biryukov via Phabricator via cfe-commits]

ilya-biryukov created this revision.
ilya-biryukov added a reviewer: ioeric.
Herald added subscribers: jfb, arphaman, jkorous, MaskRay, javed.absar.

If the contents are the same, the update most likely comes from the
fact that compile commands were invalidated. In that case we want to
avoid rebuilds in case the compile commands are actually the same.


Repository:
  rCTE Clang Tools Extra

https://reviews.llvm.org/D49783

Files:
  clangd/TUScheduler.cpp
  test/clangd/extra-flags.test
  unittests/clangd/TUSchedulerTests.cpp
  unittests/clangd/TestFS.cpp
  unittests/clangd/TestFS.h

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