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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


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