[Bug target/56807] mingw32: Conflict between stack realignment and stack probe destroys function argument in EAX

[BugMaster at narod dot ru]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56807

--- Comment #21 from Anton Mitrofanov <BugMaster at narod dot ru> ---
It should be:
          t = plus_constant (Pmode, stack_pointer_rtx,
                             allocate + UNITS_PER_WORD);