insn-attrtab for unsigned comparisons

[Kaz Kojima]

Jim Wilson <wilson@specifixinc.com> wrote:
>> It seems genattrtab generates the output like
>> "(output_for_exp0 <= (unsigned) output_for_exp1)"
>> for the expression (leu exp0 exp1).  If it was
>> "((unsigned) output_for_exp0 <= (unsigned) output_for_exp1)",
>> the above warnings could be avoided.  Is it a bad idea?
> 
> This looks like a reasonable idea.  It looks like the current code emits 
> only the second (unsigned) cast because it is trivial to emit it at the 
> same time as we emit the comparison operator.  But it shouldn't be that 
> hard to also emit an unsigned cast before the first operand.

Thanks for your comment.  I'll come up with a patch for it.

Regards,
	kaz