validate_replace_rtx_1 fix

[Jan Hubicka]

>    ... always make it the first operand.
>    ... it should always be the first operand.
>    ... always put that first even if the other operand is complex.
this case. Of course except case where both operands have this priority.
> > > Needs an 'a' before 'commutative' and a 'the' before 'canonicalize'.
> 
> As Neil pointed out, I meant this needs a 'the' _after_ 'canonicalize'.
I've noticed that too. Thanks :)

Honza
> 
> -- 
> zw   It may of course be possible that risks-awareness and extreme care are
>      developed in the course of dancing with the fuckup fairy in the pale
>      moonlight.
>      	-- Anthony de Boer