This is the mail archive of the gcc-patches@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: [patch] Disable tree-ssa DSE for now


Daniel Berlin wrote:


On Tue, 18 Jan 2005, Diego Novillo wrote:

Steven Bosscher wrote:

Thoughts?

Well, given your analysis, disabling it is not a bad idea. OTOH, DSE doesn't take a long time to run, does it? I don't think I've ever noticed it.


Also, just because a pass is fast doesn't mean we should keep it enabled :) Down this path, slowness (because it's unnecessary work) lies. We didn't get slower 30 or 40% a time, it was .7% or .3%

I agree. If the optimizer experts agree that this pass is ineffective, Steven's patch should be applied.


--
Mark Mitchell
CodeSourcery, LLC
mark@codesourcery.com
(916) 791-8304


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