This is the mail archive of the
gcc-patches@gcc.gnu.org
mailing list for the GCC project.
Re: [patch] Disable tree-ssa DSE for now
Jeffrey A Law <law@redhat.com> writes:
> On Tue, 2005-01-18 at 21:47 -0500, 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 note that DSE is able to eliminate some stores that the RTL
> optimizers are unable to eliminate.
Order of 100 dead store eliminations, out of the entire GCC source
base, does not sound like an optimization that's pulling its weight.
I am in favor of turning this off for 4.0.
zw