[Bug tree-optimization/68030] Redundant address calculations in vectorized loop

[amker at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68030

amker at gcc dot gnu.org changed:

           What    |Removed                     |Added
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                 CC|                            |amker at gcc dot gnu.org

--- Comment #5 from amker at gcc dot gnu.org ---
(In reply to Kirill Yukhin from comment #4)
> Hello Bin,
> Is it possible to handle the issue using current ivopt?

Not yet I think.  IIUC, this is the same issue as PR69710.  We need to teach
vectorizer about CSE opportunities.  I had a scratch patch fixing it in a way
just as mentioned in #comment2, I will revisit it after work on if-conversion. 
According to Richard's comment, I may need to make it a general fix, for
example, share this facility among different optimizers that need to insert
code in pre-header.

Thanks.