http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49771
--- Comment #5 from Ira Rosen <irar at il dot ibm.com> 2011-07-18 20:01:24 UTC
---
Right, the dependence analysis fails here:
(compute_affine_dependence
(stmt_a =
D.2713_5 = a[i_20];
)
(stmt_b =
a[j_19] = D.2714_6;
)
(subscript_dependence_tester
(analyze_overlapping_iterations
(chrec_a = i_20)
(chrec_b = {0, +, 1}_2)
(overlap_iterations_a = not known
)
(overlap_iterations_b = not known
)
)
(dependence classified: scev_not_known)
)
)
I think it would be better to open a separate missed-optimization pr for that.
Meanwhile, I tested the patch on powerpc64-suse-linux. I'll commit it tomorrow
if there are no objections.
Ira
