[PATCH] D46652: [clang-cl, PCH] Implement support for MS-style PCH through headers

[Mike Rice via Phabricator via cfe-commits]

mikerice created this revision.
mikerice added reviewers: rnk, thakis, erichkeane, cfe-commits.

Implement support for MS-style PCH through headers.

This enables support for /Yc and /Yu where the through header is either
on the command line or included in the source.  It replaces the current
support the requires the header also be specified with /FI.

This change adds a -cc1 option -pch-through-header that is used to either
start or stop compilation during PCH create or use.

When creating a PCH, the compilation ends after compilation of the through
header.

When using a PCH, tokens are skipped until after the through header is seen.


Repository:
  rC Clang

https://reviews.llvm.org/D46652

Files:
  include/clang/Basic/DiagnosticLexKinds.td
  include/clang/Driver/CC1Options.td
  include/clang/Frontend/FrontendOptions.h
  include/clang/Lex/Preprocessor.h
  include/clang/Lex/PreprocessorOptions.h
  lib/Driver/Driver.cpp
  lib/Driver/ToolChains/Clang.cpp
  lib/Frontend/CompilerInstance.cpp
  lib/Frontend/CompilerInvocation.cpp
  lib/Lex/PPDirectives.cpp
  lib/Lex/PPLexerChange.cpp
  lib/Lex/Preprocessor.cpp
  lib/Parse/ParseAST.cpp
  lib/Serialization/ASTReader.cpp
  test/Driver/cl-pch-search.cpp
  test/Driver/cl-pch.cpp
  test/PCH/Inputs/pch-through-use0.cpp
  test/PCH/Inputs/pch-through-use1.cpp
  test/PCH/Inputs/pch-through-use2.cpp
  test/PCH/Inputs/pch-through1.h
  test/PCH/Inputs/pch-through2.h
  test/PCH/Inputs/pch-through3.h
  test/PCH/Inputs/pch-through4.h
  test/PCH/pch-through.cpp

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