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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/65206] Vectorized version of loop is removed.
Date: Wed, 25 Feb 2015 15:33:00 -0000 [thread overview]
Message-ID: <bug-65206-4-Wl2ErNt4oV@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-65206-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65206
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #4)
> I'm talking about
>
> (compute_affine_dependence
> stmt_a: _5 = a1[i_16];
> stmt_b: MASK_STORE (_34, 0B, _ifc__32, _9);
> ) -> dependence analysis failed
Ah - this is pointer vs. array access, thus different "base". A generic issue
that can for example be "solved" by trying to force a pointer base for
a non-pointer base DR when analysis fails and one is based on a pointer.
Hmm.
Mine.
> somehow it works for
>
> (compute_affine_dependence
> stmt_a: _8 = MASK_LOAD (_33, 0B, _ifc__32);
> stmt_b: MASK_STORE (_35, 0B, _ifc__36, _11);
> (analyze_overlapping_iterations
> (chrec_a = {0B, +, 4}_1)
> (chrec_b = {0B, +, 4}_1)
> (overlap_iterations_a = [0])
> (overlap_iterations_b = [0]))
> )
next prev parent reply other threads:[~2015-02-25 15:02 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-25 14:50 [Bug tree-optimization/65206] New: " ysrumyan at gmail dot com
2015-02-25 14:55 ` [Bug tree-optimization/65206] " ysrumyan at gmail dot com
2015-02-25 15:08 ` rguenth at gcc dot gnu.org
2015-02-25 15:11 ` rguenth at gcc dot gnu.org
2015-02-25 15:30 ` rguenth at gcc dot gnu.org
2015-02-25 15:33 ` rguenth at gcc dot gnu.org [this message]
2015-02-26 12:15 ` rguenth at gcc dot gnu.org
2015-02-26 12:38 ` rguenth at gcc dot gnu.org
2021-09-08 11:08 ` rguenth at gcc dot gnu.org
2021-09-20 6:51 ` [Bug tree-optimization/65206] vectorized version of loop is removed, dependence analysis fails for *&a[i] vs a[j] cvs-commit at gcc dot gnu.org
2021-09-20 6:51 ` rguenth at gcc dot gnu.org
2022-03-29 12:57 ` rguenth at gcc dot gnu.org
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