On Jun 02, 2005 03:09 PM, Mostafa Hagog <[EMAIL PROTECTED]> wrote: > As to the subtraction for IA-64; I expect that the gen_sub2_insn handles > the subtraction correctly and generate the required RTL to do the > subtraction according to the machine description.
But that expectation is incorrect. gen_sub2_insn will quite hapilly produce RTL that doesn't satisfy the predicates and constraints of any insn. > If it requires additional > moves this is due to a target limitation, which means this is not the > problem of SMS, it should be somewhere in the machine description. No, the machine description is fine. There simply are no sub and add insns for ar.lc (loop counter reg on ia64). Gr. Steven
