[PATCH,AVR] Allow zero constraint for general register load

[Anatoly Sokolov]

Hi.

> Could you please review and approve?
>
> 2009-09-12   Andy Hutchinson   <hutchinsonandy@aim.com>
>
>        * config/avr.md (movqi): Add zero as equally preferable constraint 
> as general register.
>         (movhi): Ditto.
>

Change 'movqi' and 'movhi' on '*movqi' and '*movhi'.

>
>
> Index: avr.md
> ===================================================================
> --- avr.md    (revision 151661)
> +++ avr.md    (working copy)
> @@ -235,7 +235,7 @@
>
> (define_insn "*movqi"
>   [(set (match_operand:QI 0 "nonimmediate_operand" "=r,d,Qm,r,q,r,*r")
> -    (match_operand:QI 1 "general_operand"       "r,i,rL,Qm,r,q,i"))]
> +    (match_operand:QI 1 "general_operand"       "rL,i,rL,Qm,r,q,i"))]
>   "(register_operand (operands[0],QImode)
>     || register_operand (operands[1], QImode) || const0_rtx == 
> operands[1])"
>   "* return output_movqi (insn, operands, NULL);"
> @@ -336,7 +336,7 @@
>
> (define_insn "*movhi"
>   [(set (match_operand:HI 0 "nonimmediate_operand" "=r,r,m,d,*r,q,r")
> -        (match_operand:HI 1 "general_operand"       "r,m,rL,i,i,r,q"))]
> +        (match_operand:HI 1 "general_operand"       "rL,m,rL,i,i,r,q"))]
>   "(register_operand (operands[0],HImode)
>     || register_operand (operands[1],HImode) || const0_rtx == 
> operands[1])"
>   "* return output_movhi (insn, operands, NULL);"
>

Ok.

Anatoly.