[PATCH] D131124: [Serialization] Remove `ORIGINAL_PCH_DIR` record

[Argyrios Kyrtzidis via Phabricator via cfe-commits]

akyrtzi created this revision.
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Use of `ORIGINAL_PCH_DIR` record has been superseeded by making PCH/PCM files with relocatable paths at write time.
Removing this record is useful for producing an output-path-independent PCH file and enable sharing of the same PCH file even
when it was intended for a different output path.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D131124

Files:
  clang/include/clang/Driver/Options.td
  clang/include/clang/Frontend/FrontendOptions.h
  clang/include/clang/Serialization/ASTBitCodes.h
  clang/include/clang/Serialization/ASTWriter.h
  clang/include/clang/Serialization/ModuleFile.h
  clang/lib/Frontend/FrontendActions.cpp
  clang/lib/Serialization/ASTReader.cpp
  clang/lib/Serialization/ASTWriter.cpp
  clang/lib/Serialization/GeneratePCH.cpp
  clang/test/Modules/relative-original-dir.m
  clang/test/PCH/pch-output-path-independent.c

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