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[Bug tree-optimization/56624] Vectorizer gives up on a group-access if it contains stores to the same location
- 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: Fri, 15 Mar 2013 11:54:50 +0000
- Subject: [Bug tree-optimization/56624] Vectorizer gives up on a group-access if it contains stores to the same location
- Auto-submitted: auto-generated
- References: <bug-56624-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56624
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2013-03-15
Ever Confirmed|0 |1
Known to fail| |4.8.0
Build|4.8.0 20130313 |
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> 2013-03-15 11:54:50 UTC ---
> This test is a reproducer of similar problem encountered on Spec2006/470.lbm -
> there if-conversion could produce stores to the same location which will stop
> vectorizer.
Can you reproduce a testcase for that instead? It doesn't make sense
to handle code that should be optimized earlier (by DSE). Is it from
code like
if (cond)
a[i] = 3;
else
a[i] = 3;
?