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

[Anton Korobeynikov]

  This is very invasive patch which definitely cannot be accepted as-is now, simply because it brings target-specific stuff inside the target-independent code.

  Also, the patch has not tests at all, so it's hard to see, which problem the patch wants to solve (and thus it's not possible to suggest the alternative solution).

  Start by adding the tests and we'll see how it will need to be reworked.

http://llvm-reviews.chandlerc.com/D1998