[PATCH] D37891: Driver: hoist the `wchar_t` handling to the driver

[Saleem Abdulrasool via Phabricator via cfe-commits]

compnerd updated this revision to Diff 117832.
compnerd added a comment.

Moves the logic back into Basic.  The flags are now optional, but controlled by the driver.  The test adjustments are to map the old `-fshort-wchar` to `-fwchar-type=short -fno-signed-wchar` for the most part, there is one case where we were checking that we were passing `-fshort-wchar` through to the frontend, which we no longer do.


https://reviews.llvm.org/D37891

Files:
  include/clang/Basic/DiagnosticFrontendKinds.td
  include/clang/Basic/LangOptions.def
  include/clang/Driver/CC1Options.td
  include/clang/Driver/Options.td
  lib/Basic/TargetInfo.cpp
  lib/Basic/Targets/AArch64.cpp
  lib/Basic/Targets/ARM.cpp
  lib/Basic/Targets/AVR.h
  lib/Basic/Targets/OSTargets.h
  lib/Basic/Targets/X86.h
  lib/Basic/Targets/XCore.h
  lib/Driver/ToolChains/Clang.cpp
  lib/Frontend/CompilerInstance.cpp
  lib/Frontend/CompilerInvocation.cpp
  test/CXX/conv/conv.prom/p2.cpp
  test/CodeGen/arm-metadata.c
  test/CodeGen/pascal-wchar-string.c
  test/CodeGen/string-literal-short-wstring.c
  test/CodeGen/string-literal-unicode-conversion.c
  test/CodeGen/wchar-size.c
  test/Driver/clang_f_opts.c
  test/Headers/wchar_limits.cpp
  test/Index/index-pch.cpp
  test/Lexer/wchar.c
  test/Preprocessor/init.c
  test/Preprocessor/pr19649-unsigned-wchar_t.c
  test/Preprocessor/wchar_t.c
  test/Sema/wchar.c
  test/SemaCXX/short-wchar-sign.cpp

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