[patch] Disable tree-ssa DSE for now

[Mark Mitchell]

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
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