fixed_scalar_and_varying_struct_p and varies_p

[Eric Botcazou]

> I'd say open a missed optimization bug with the testcase and go ahead
> with both patches.  Let's see if Eric has some comments first though.

None, but the m32c maintainer may have some.

DJ, do you happen to know the rationale for the use of the MEM_SCALAR_P and 
MEM_IN_STRUCT_P flags in m32c_immd_dbl_mov?  What condition do these tests try 
to model exactly?

-- 
Eric Botcazou