[Bug tree-optimization/18595] [4.0 Regression] IV-OPTS is O(N^3)

[dberlin at dberlin dot org]

------- Additional Comments From dberlin at gcc dot gnu dot org  2005-01-25 00:39 -------
Subject: Re:  [4.0 Regression] IV-OPTS is O(N^3)


>>>>
>>>> Uh, symbolic references are or will be used to do data dependence when
>>>> MEM_REF and ARRAY_REF couldn't be generated from the pointers.
>>>
>>> How?  If the reference is left in symbolic form, it means that you know
>>> nothing about its value,
>>
>> Wrong.
>>
>> We could know things about it's value, such as ranges. We just don't know
>> an exact number.
>
> OK.  This is work for VRP, not scev.

And once we have it, we can talk about removing the symbolic stuff from 
SCEV :)



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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18595