Re: RFA: m32r/x support

[Nick Clifton <nickc at cambridge dot redhat dot com>]

Hi Catherine,

  Why define a couple of new pieces of RTL...

> + /* Express a group of insns that are executed in parallel.
> +    1st operand: Vector of insns.
> +    2nd operand: Available for scheduler use.  */
> + DEF_RTL_EXPR(GROUP_PARALLEL, "group_parallel", "E0", 'g')
> + 
> + /* Express a group of insns that are executed in sequence.
> +    1st operand: Vector of insns.
> +    2nd operand: Available for scheduler use.  */
> + DEF_RTL_EXPR(GROUP_SEQUENCE, "group_sequence", "E0", 'g')


  And then define patterns that abort if they are used ?

> + (define_insn "*small_parallel"
> +   [(group_parallel [(match_insn 0 "small_insn_p")
> + 		    (match_insn 1 "small_insn_p")])]
> +   "TARGET_M32RX"
> +   "*
> + {
> +   abort ();
> + }"
> +   [(set_attr "length" "4")
> +    (set_attr "type" "multi")])
> + 
> + (define_insn "*long_group"
> +   [(group_sequence [(match_insn 0 "large_insn_p")])]
> +   ""
> +   "*
> + {
> +   abort ();
> + }"
> +   [(set_attr "length" "4")
> +    (set_attr "type" "multi")])
> + 

  And which, as far as I can tell, will never actually be generated in
  the first place ?

Cheers
        Nick