------- Comment #4 from dorit at il dot ibm dot com 2007-06-18 11:08 -------
I see this in the vectorizer dump file (with mainline from a few days ago):
(compute_affine_dependence
(stmt_a =
D.1423_50 = (*a_49(D))[D.1422_48])
(stmt_b =
(*a_49(D))[D.1420_51] = D.1425_54)
Data ref a:
(Data Ref:
stmt: D.1423_50 = (*a_49(D))[D.1422_48];
ref: (*a_49(D))[D.1422_48];
base_object: (*a_49(D))[0];
Access function 0: {pretmp.48_45 + 1, +, 1}_1
Access function 1: 0B
)
Data ref b:
(Data Ref:
stmt: (*a_49(D))[D.1420_51] = D.1425_54;
ref: (*a_49(D))[D.1420_51];
base_object: (*a_49(D))[0];
Access function 0: {0, +, 1}_1
Access function 1: 0B
)
affine dependence test not usable: access function not affine or constant.
(dependence classified: scev_not_known)
)
(compute_affine_dependence
(stmt_a =
D.1424_53 = (*b_52(D))[D.1420_51])
(stmt_b =
(*a_49(D))[D.1420_51] = D.1425_54)
)
(the IR looks a bit different than PR32075, but the data-rependence analysis
fails with the same problem). pinskia - are you still planning to address this
issue?
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32378
