On Wed, Jul 18, 2012 at 9:59 AM, Richard Guenther <rguent...@suse.de> wrote: > On Tue, 17 Jul 2012, William J. Schmidt wrote: > >> I overlooked adding a pass-control flag for strength reduction, added >> here. I named it -ftree-slsr for consistency with other -ftree- flags, >> but could change it to -fgimple-slsr if you prefer that for a pass named >> gimple-ssa-... >> >> Bootstrapped and tested on powerpc-unknown-linux-gnu with no new >> regressions. Ok for trunk? > > The switch needs documentation in doc/invoke.texi. Other than that > it's fine to stick with -ftree-..., even that exposes details to our > users that are not necessary (RTL passes didn't have -frtl-... either). > So in the end, why not re-use -fstrength-reduce that is already available > (but stubbed out)?
In the past, -fstrength-reduce applied to loop strength reduction in loop.c. I don't think it should be re-used for a completely different code transformation. Ciao! Steven
