optimization/2962: unnecessary instruction cwtl

[rth@gcc.gnu.org]

Synopsis: unnecessary instruction cwtl

State-Changed-From-To: open->analyzed
State-Changed-By: rth
State-Changed-When: Tue Apr  2 01:15:31 2002
State-Changed-Why:
    The combiner creates
      (and:HI (mem:HI ...) (const_int 1))
    at which point it isn't allowed to widen the operation.
    
    Need to adjust ix86_binary_operator_ok such that it doesn't
    allow a memory source without a register source that we could
    possibly match.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=2962