On 20 November 2013 19:47, ballsystemlord wrote: > I think I'd like to pass these: > > omega-eliminate-redundant-constraints=1 > l1-cache-size=128kb > l2-cache-size=256kb > use-canonical-types > tree-reassoc-width=0 $ gcc --help=params | head -3 The --param option recognizes the following as parameters: predictable-branch-outcome Maximal estimated outcome of branch considered predictable Or look in the manual and search for "param" at http://gcc.gnu.org/onlinedocs/gcc/Option-Summary.html