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[Bug tree-optimization/43768] New: VRP destroys loop form

From: "rguenth at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
To: gcc-bugs at gcc dot gnu dot org
Date: 16 Apr 2010 14:08:10 -0000
Subject: [Bug tree-optimization/43768] New: VRP destroys loop form
Reply-to: gcc-bugzilla at gcc dot gnu dot org

For the testcase in PR43571 when not disabling VRP complete unrolling can
not figure out the number of iterations because VRP jump threading destroys
proper loop form.


-- 
           Summary: VRP destroys loop form
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Keywords: missed-optimization
          Severity: enhancement
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: rguenth at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43768

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