This is the mail archive of the gcc@gcc.gnu.org mailing list for the GCC project.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Re: -fprofile-generate and -fprofile-use


> >you may try adding -fmove-loop-invariants flag, which enables new
> >invariant motion pass.
> 
> That cleaned up both my simplified test case, and the code it
> originated from.  It also cleaned up a few other cases where I
> was noticing worse performance with FDO enabled.  Thanks!!
> 
> Perhaps this option should be enabled by default when doing FDO
> to replace the loop invariant motions done by the recently
> disabled loop optimize pass.

This sounds like sane idea.  Zdenek, is -fmove-loop-invariants dangerous
in some way or just disabled because old loop does the same?

Honza
> 
> Pete


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]