[PATCH] D124250: [Serialization] write expr dependence bits as a single integer

[Sam McCall via Phabricator via cfe-commits]

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When exprs are written unabbreviated:

- these were encoded as 5 x vbr6 = 30 bits
- now they fit exactly into a one-chunk vbr = 6 bits

clangd --check=clangd/AST.cpp reports ~1% reduction in PCH size
(42826720->42474460)


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D124250

Files:
  clang/lib/Serialization/ASTReaderStmt.cpp
  clang/lib/Serialization/ASTWriterDecl.cpp
  clang/lib/Serialization/ASTWriterStmt.cpp

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