Performace decrease with -freduce-all-givs

[Andreas Jaeger]

Kevin Camera <kcamera@eecs.berkeley.edu> writes:

> Hello,
>
> Here is some temporary source for a class project that exhibits worse
> performance (about 15% worse) with the -freduce-all-givs option set.  The
> performance degrades even more if -fmove-all-movables is set, in case that
> helps you at all.

Which compiler and which compiler flags did you use?  Which architecture?

> I'm not a compiler guy, so sorry if the source is all I can offer...

That's a C source, the discussion was related to Fortran source.

Andreas
-- 
 Andreas Jaeger
  SuSE Labs aj@suse.de
   private aj@arthur.inka.de
    http://www.suse.de/~aj