disabling loop unrolling in GCC

disabling loop unrolling in GCC

Dotan Shavit dotan at shavitos.com
Mon Dec 21 16:41:18 IST 2009


On Monday 21 December 2009 14:00:39 Shachar Shemesh wrote:
> Where it gets worrying is when I try to cancel loop unrolling. I tried
>  "-fno-unroll-loops" and "-fno-peel-loops", to no effect. I even tried
>  messing with the --param option (max-unrolled-insns, max-unroll-times,
>  max-peel-times) to no noticeable effect
> 
max-completely-peeled-insns is your friend

This param's value is also the difference between -O3 and -O2 you were missing



More information about the Linux-il mailing list