Reuse predicate code analysis for constraints

[Richard Sandiford]

Bill Schmidt <wschmidt@linux.vnet.ibm.com> writes:
> Hi Richard,
>
> Unfortunately this broke the Power builds:
>
> /home/wschmidt/gcc/gcc-mainline-base/gcc/config/rs6000/constraints.md:211:
> reference to unknown predicate 'mem_operand_gpr'
> /home/wschmidt/gcc/gcc-mainline-base/gcc/config/rs6000/constraints.md:242:
> reference to unknown predicate 'small_data_operand'
>
> I haven't had time to investigate further -- will be in meetings most of
> the morning.

This is because those functions aren't defined as predicates in the .md file,
but are being used with match_operand.  If they're meant to be "real"
predicates, they should be defined in predicates.md rather than rs6000.c.
If they're just query functions, you can use match_test instead of
match_operand.  (In that case there's probably no point passing the mode.)

Thanks,
Richard