[PATCH] D149693: [clang][deps] Make clang-scan-deps write modules in raw format

[Ben Langmuir via Phabricator via cfe-commits]

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We have no use for debug info for the scanner modules, and writing raw ast files speeds up scanning ~15% in some cases. Note that the compile commands produced by the scanner will still build the obj format (if requested), and the scanner can *read* obj format pcms, e.g. from a PCH.

rdar://108807592


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D149693

Files:
  clang/include/clang/CodeGen/ObjectFilePCHContainerOperations.h
  clang/include/clang/Serialization/PCHContainerOperations.h
  clang/lib/CodeGen/ObjectFilePCHContainerOperations.cpp
  clang/lib/Frontend/ASTUnit.cpp
  clang/lib/Serialization/PCHContainerOperations.cpp
  clang/lib/Tooling/DependencyScanning/DependencyScanningWorker.cpp
  clang/test/ClangScanDeps/module-format.c
  clang/tools/libclang/CIndex.cpp
  clang/tools/libclang/Indexing.cpp

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