[PATCH] D112661: [clangd] reuse preambles from other files when possible

[Quentin Chateau via Phabricator via cfe-commits]

qchateau created this revision.
qchateau added a reviewer: sammccall.
Herald added subscribers: usaxena95, kadircet, arphaman, javed.absar.
qchateau requested review of this revision.
Herald added subscribers: cfe-commits, MaskRay, ilya-biryukov.
Herald added a project: clang-tools-extra.

Keep a store of the preambles of all opened filed, plus 
a configurable number of previously used preambles (default 1). 
When building the AST for a TU, if the preamble for this 
TU is not yet built, look through the stored premables 
to find the best compatible preamble and use this 
preamble to speed-up the AST build.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D112661

Files:
  clang-tools-extra/clangd/ClangdServer.cpp
  clang-tools-extra/clangd/ClangdServer.h
  clang-tools-extra/clangd/ParsedAST.cpp
  clang-tools-extra/clangd/TUScheduler.cpp
  clang-tools-extra/clangd/TUScheduler.h
  clang-tools-extra/clangd/tool/ClangdMain.cpp

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