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[Bug tree-optimization/52943] [4.7/4.8 Regression] likely wrong code bug caused by predictive commoning
- 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: Thu, 12 Apr 2012 09:24:48 +0000
- Subject: [Bug tree-optimization/52943] [4.7/4.8 Regression] likely wrong code bug caused by predictive commoning
- Auto-submitted: auto-generated
- References: <bug-52943-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52943
--- Comment #2 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-04-12 09:24:48 UTC ---
(compute_affine_dependence
stmt_a: D.1717_2 = a[3];
stmt_b: a[b.0_15] = D.1719_4;
(subscript_dependence_tester
(analyze_overlapping_iterations
(chrec_a = 3)
(chrec_b = {3, +, -1}_1)
(analyze_siv_subscript
)
(overlap_iterations_a = no dependence
)
(overlap_iterations_b = no dependence
)
)
(dependence classified: scev_known)
)
) -> no dependence
Obviously wrong.