[PATCH] D132430: [clang][modules] Track affecting modules

[Jan Svoboda via Phabricator via cfe-commits]

jansvoboda11 created this revision.
jansvoboda11 added reviewers: benlangmuir, Bigcheese.
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When compiling a module, its semantics and Clang's behavior is affected by other modules. These are typically the **imported** modules. However, during implicit build, some modules end up being compiled and read without being actually imported. This patch starts tracking such modules and serializing them into `.pcm` files. This enables the dependency scanner to construct explicit compilations that mimic implicit build.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D132430

Files:
  clang/include/clang/Basic/Module.h
  clang/include/clang/Lex/ModuleLoader.h
  clang/include/clang/Lex/Preprocessor.h
  clang/include/clang/Serialization/ASTBitCodes.h
  clang/include/clang/Serialization/ASTReader.h
  clang/include/clang/Tooling/DependencyScanning/ModuleDepCollector.h
  clang/lib/Frontend/CompilerInstance.cpp
  clang/lib/Lex/HeaderSearch.cpp
  clang/lib/Lex/PPDirectives.cpp
  clang/lib/Serialization/ASTReader.cpp
  clang/lib/Serialization/ASTWriter.cpp
  clang/lib/Tooling/DependencyScanning/ModuleDepCollector.cpp
  clang/test/ClangScanDeps/modules-incomplete-umbrella.c

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