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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/55555] [4.8 Regression] miscompilation at -O2 (number_of_iterations)
Date: Tue, 18 Dec 2012 13:13:00 -0000 [thread overview]
Message-ID: <bug-55555-4-SXbM2MbMPv@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-55555-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55555
--- Comment #12 from Richard Biener <rguenth at gcc dot gnu.org> 2012-12-18 13:12:39 UTC ---
Author: rguenth
Date: Tue Dec 18 13:12:34 2012
New Revision: 194578
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=194578
Log:
2012-12-18 Richard Biener <rguenther@suse.de>
PR tree-optimization/55555
* tree-ssa-loop-niter.c (idx_infer_loop_bounds): Properly
analyze evolution of the index for the loop it is used in.
* tree-scalar-evolution.c (instantiate_scev_name): Take
inner loop we will be creating a chrec for. Generalize
fix for PR40281 and prune invalid SCEVs.
(instantiate_scev_poly): Likewise - pass down inner loop
we will be creating a chrec for.
(instantiate_scev_binary): Take and pass through inner loop.
(instantiate_array_ref): Likewise.
(instantiate_scev_convert): Likewise.
(instantiate_scev_not): Likewise.
(instantiate_scev_3): Likewise.
(instantiate_scev_2): Likewise.
(instantiate_scev_1): Likewise.
(instantiate_scev_r): Likewise.
(resolve_mixers): Adjust.
(instantiate_scev): Likewise.
* gcc.dg/torture/pr55555.c: New testcase.
* gcc.dg/vect/vect-iv-11.c: Adjust.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr55555.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/vect/vect-iv-11.c
trunk/gcc/tree-scalar-evolution.c
trunk/gcc/tree-ssa-loop-niter.c
next prev parent reply other threads:[~2012-12-18 13:13 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-01 15:46 [Bug middle-end/55555] New: [4.8 Regression] miscompilation at -O2 Joost.VandeVondele at mat dot ethz.ch
2012-12-01 15:53 ` [Bug middle-end/55555] [4.8 Regression] miscompilation at -O2 (tree-pre?) Joost.VandeVondele at mat dot ethz.ch
2012-12-01 17:03 ` dominiq at lps dot ens.fr
2012-12-01 19:17 ` hjl.tools at gmail dot com
2012-12-02 9:59 ` hubicka at gcc dot gnu.org
2012-12-02 10:11 ` Joost.VandeVondele at mat dot ethz.ch
2012-12-02 11:04 ` hubicka at ucw dot cz
2012-12-07 9:45 ` jakub at gcc dot gnu.org
2012-12-07 12:28 ` [Bug middle-end/55555] [4.8 Regression] miscompilation at -O2 (number_of_iterations) jakub at gcc dot gnu.org
2012-12-14 13:49 ` rguenth at gcc dot gnu.org
2012-12-14 14:12 ` rguenth at gcc dot gnu.org
2012-12-17 10:15 ` rguenth at gcc dot gnu.org
2012-12-17 12:15 ` rguenth at gcc dot gnu.org
2012-12-18 13:13 ` rguenth at gcc dot gnu.org [this message]
2012-12-18 13:30 ` rguenth at gcc dot gnu.org
2014-12-10 12:40 ` rguenth at gcc dot gnu.org
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