code hoisting with CCmode condition codes

[Richard Henderson]

On 01/06/2013 01:11 PM, Alan Lehotsky wrote:
> Do I need to do something like change my define_expand for addsi3 to be something like
> 
>  
>     [ (parallel [ (clobber:CCmode (reg:CCmode CCREG))
>                         (set:SI (match_operand:SI 0 "" "")
>                                     (plus:SI (match_operand::SI 1 "" "" )
> 	 					   (match_operand:SI 2 "" "")))])]
> 
> So that there's an explicitly stated dependency that would prevent motioning before the use in the jump_insn?

Yes.

(With the note that SETs appear first in parallels, with CLOBBERs last.)


r~