Messages in this thread | | | Date | Thu, 17 Dec 1998 22:13:04 +0100 | From | Marc Lehmann <> | Subject | Re: pgcc optimizationss |
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On Thu, Dec 17, 1998 at 02:15:59AM -0500, Anthony Barbachan wrote: > >Well 2.1.x seems to be ok with egcs, and egcs current + the assembler > >patches Bernd and co have provided should be rock safe. Having said that > > I am assuming by assembler patches you mean pgcc, am I correct?
I hope not ;)
> >you don't want to use -O6 with the kernel. -O6 says "please go around and > >inline things as you feel". The kernel authors have already done that and > >made a better job of it than the compiler will > > What would be the maximum safe optimization level?
For gcc, its not a question of safe, but a question of "sane". -O3 won't neccesarily produce a faster/better kernel. It will produce a much larger kernel, thoguh, for sure.
For pgcc, higher opt-levels may make sense, turning off inlining might be good as well. BUT, not with the current kernel.
-----==- | ----==-- _ | ---==---(_)__ __ ____ __ Marc Lehmann +-- --==---/ / _ \/ // /\ \/ / pcg@goof.com |e| -=====/_/_//_/\_,_/ /_/\_\ --+ The choice of a GNU generation | |
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