[PATCH] chkstk for Windows

[Anton Korobeynikov]

> It's easy to bring back the  !Subtarget->isTargetEnvMacho()  condition but
> is it correct?
For now - yes. Looks like macho environment was used to build some EFI code...

> mingw32 is COFF by default (unless -elf) so results should have been the
> same as before, right?
Yes.

> Do the standard regression tests run at all under Windows? I'll try building
> them right now.
>
> I'm fairly new at this, sorry for any trouble!
No problem. You may want to revert your change for a moment, fix the
problem and then recommit.

-- 
With best regards, Anton Korobeynikov
Faculty of Mathematics and Mechanics, Saint Petersburg State University