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[Bug tree-optimization/68030] Redundant address calculations in vectorized loop
- From: "rguenth at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Tue, 20 Oct 2015 14:06:26 +0000
- Subject: [Bug tree-optimization/68030] Redundant address calculations in vectorized loop
- Auto-submitted: auto-generated
- References: <bug-68030-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68030
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2015-10-20
CC| |rguenth at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Induction variable optimization is responsible here but it needs some help from
a CSE. I proposed adding a late FRE for that some time ago. The issue is that
the vectorizer creates some redundancies when creating address IVs for the
vectorized accesses.