[PATCH] 128-bit ABI for x86_64-w64-mingw32 incorrectly generated

[Anton Korobeynikov]

  @vtjnash obviously, everything should be moved into X86 target. Any check for "win64" and similar stuff inside the common codegen is not acceptable at all. However, first you need to show that there is indeed a problem somewhere - I believe that the calling convention bits for 128 bit stuff is correct there.

http://reviews.llvm.org/D1998