[PATCH] D20171: Support for MSVS default calling convention options (/Gd, /Gz, /Gv, /Gr)

[Alexander Makarov via cfe-commits]

a.makarov updated this revision to Diff 57062.
a.makarov added a comment.

Thanks for the review! I've updated the patch, please take a look.
Modifications:

- the dependency from MS compatibility mode is removed;
- the option is renamed into '-fdefault-calling-conv' (since it's not in MS compatibility mode);
- the '-mrtd' option is now an alias for '-fdefault-calling-conv=stdcall';
- 'stdcall' is now ignored for variadic functions;
- since 'vectorcall' requires SSE2 or higher (https://msdn.microsoft.com/en-us/library/dn375768.aspx) the necessary check is added


http://reviews.llvm.org/D20171

Files:
  include/clang/Basic/LangOptions.def
  include/clang/Basic/LangOptions.h
  include/clang/Driver/CC1Options.td
  include/clang/Driver/CLCompatOptions.td
  include/clang/Driver/Options.td
  lib/AST/ASTContext.cpp
  lib/Driver/Tools.cpp
  lib/Frontend/CompilerInvocation.cpp
  lib/Sema/SemaDeclAttr.cpp
  test/CodeGenCXX/default_calling_conv.cpp

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