[PATCH] D142028: [clang] remove SUBMODULE_TOPHEADER

[Richard Howell via Phabricator via cfe-commits]

rmaz created this revision.
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We are seeing issues with path serialization of the
`SUBMODULE_TOPHEADER` field when the inputs are links. While working
on a fix I noticed this field does not appear to be used anywhere
outside of libclang. This diff removes the field entirely and 
updates the libclang API to always return empty top headers.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D142028

Files:
  clang/include/clang/Basic/Module.h
  clang/include/clang/Serialization/ASTBitCodes.h
  clang/lib/Basic/Module.cpp
  clang/lib/Frontend/FrontendAction.cpp
  clang/lib/Lex/ModuleMap.cpp
  clang/lib/Serialization/ASTReader.cpp
  clang/lib/Serialization/ASTWriter.cpp
  clang/test/Index/annotate-module.m
  clang/test/Modules/relative-submodule-topheader.m
  clang/tools/libclang/CIndex.cpp

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