------- Additional Comments From andrewhutchinson at cox dot net 2005-01-30 04:58 ------- Subject: Re: Poor optimisation of loop test
I am not sure what makes you think that. Compare with ZERO is invariabley cheaper than compare with "n". The former is "free" sign status following any conditioning setting instruction - like subtract! Its even the sign bit of the result! subi r28,10 cpi r28, -10 brpl looptop subi r28,10 brpl looptop or did I miss something? pinskia at gcc dot gnu dot org wrote: >------- Additional Comments From pinskia at gcc dot gnu dot org 2005-01-30 >03:17 ------- >Hmm, on most targets it is true that != is the same case as >=. > > > -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19703
