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From: "dorit at il dot ibm dot com" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/32378] can't determine dependence (distinct sections of an array) Date: Mon, 18 Jun 2007 11:08:00 -0000 [thread overview] Message-ID: <20070618110843.1159.qmail@sourceware.org> (raw) In-Reply-To: <bug-32378-33@http.gcc.gnu.org/bugzilla/> ------- 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
next prev parent reply other threads:[~2007-06-18 11:08 UTC|newest] Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top 2007-06-17 15:35 [Bug fortran/32378] New: " tprince at computer dot org 2007-06-17 15:36 ` [Bug fortran/32378] " tprince at computer dot org 2007-06-18 1:40 ` tprince at computer dot org 2007-06-18 3:16 ` [Bug tree-optimization/32378] " pinskia at gcc dot gnu dot org 2007-06-18 11:08 ` dorit at il dot ibm dot com [this message] 2007-06-21 23:32 ` pinskia at gcc dot gnu dot org 2007-07-01 12:43 ` dorit at gcc dot gnu dot org 2007-08-19 13:47 ` dorit at gcc dot gnu dot org [not found] <bug-32378-4@http.gcc.gnu.org/bugzilla/> 2012-07-16 13:03 ` rguenth at gcc dot gnu.org
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