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[Bug tree-optimization/23619] Missed pre opportunity
- From: "rakdver at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 29 Aug 2005 12:46:55 -0000
- Subject: [Bug tree-optimization/23619] Missed pre opportunity
- References: <20050829090219.23619.rakdver@gcc.gnu.org>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From rakdver at gcc dot gnu dot org 2005-08-29 12:46 -------
Is it really a duplicate? I think that in 23286, VUSE at ii may be the problem;
but in this testcase, there is nothing that can prevent p+q from being moved out
of loop. Also, in the expression p + q is partially redundant over the back
edge of the loop, so PRE should work for it.
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23619