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From: "ctice at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/66917] [4.9/5 regression] ARM: NEON: memcpy compiles to vst1 with incorrect alignment
Date: Thu, 24 Sep 2015 20:57:00 -0000 [thread overview]
Message-ID: <bug-66917-4-2XBkTsjLDZ@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-66917-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66917
--- Comment #21 from ctice at gcc dot gnu.org ---
Author: ctice
Date: Thu Sep 24 20:56:29 2015
New Revision: 228099
URL: https://gcc.gnu.org/viewcvs?rev=228099&root=gcc&view=rev
Log:
Backport r226487 from GCC FSF mainline:
r226487 | rguenth | 2015-08-03 00:13:36 -0700 (Mon, 03 Aug 2015) | 15 lines
2015-08-03 Richard Biener <rguenther@suse.de>
PR tree-optimization/66917
* tree-vectorizer.h (struct dataref_aux): Add base_element_aligned
field.
(DR_VECT_AUX): New macro.
(set_dr_misalignment): Adjust.
(dr_misalignment): Likewise.
* tree-vect-data-refs.c (vect_compute_data_ref_alignment):
Compute whether the base is at least element aligned.
* tree-vect-stmts.c (ensure_base_align): Adjust.
(vectorizable_store): If the base is not element aligned
preserve alignment of the original access if misalignment is unknown.
(vectorizable_load): Likewise.
Modified:
branches/google/gcc-4_9-mobile/gcc/tree-vect-data-refs.c
branches/google/gcc-4_9-mobile/gcc/tree-vect-stmts.c
branches/google/gcc-4_9-mobile/gcc/tree-vectorizer.h
next prev parent reply other threads:[~2015-09-24 20:57 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <bug-66917-4@http.gcc.gnu.org/bugzilla/>
2015-07-19 18:28 ` [Bug target/66917] ARM: NEON: memcpy compiles to vld1 and " mikpelinux at gmail dot com
2015-07-29 8:21 ` [Bug tree-optimization/66917] " ramana at gcc dot gnu.org
2015-07-29 8:23 ` [Bug tree-optimization/66917] [4.9/5/6 regression] " ramana at gcc dot gnu.org
2015-07-29 14:03 ` ktkachov at gcc dot gnu.org
2015-07-29 14:37 ` rguenth at gcc dot gnu.org
2015-07-29 14:41 ` ktkachov at gcc dot gnu.org
2015-07-29 14:47 ` ktkachov at gcc dot gnu.org
2015-07-30 7:20 ` [Bug tree-optimization/66917] [4.9/5/6 regression] ARM: NEON: memcpy compiles to vst1 with incorrect alignment due to SRA rguenth at gcc dot gnu.org
2015-07-30 7:43 ` [Bug target/66917] " rguenth at gcc dot gnu.org
2015-07-30 7:48 ` rguenth at gcc dot gnu.org
2015-07-30 14:11 ` [Bug tree-optimization/66917] " rearnsha at gcc dot gnu.org
2015-07-30 14:39 ` rguenther at suse dot de
2015-07-30 14:41 ` rguenth at gcc dot gnu.org
2015-07-31 9:20 ` rguenth at gcc dot gnu.org
2015-07-31 9:23 ` ktkachov at gcc dot gnu.org
2015-07-31 13:21 ` ktkachov at gcc dot gnu.org
2015-08-03 7:14 ` [Bug tree-optimization/66917] [4.9/5 regression] ARM: NEON: memcpy compiles to vst1 with incorrect alignment rguenth at gcc dot gnu.org
2015-08-03 7:14 ` rguenth at gcc dot gnu.org
2015-09-24 20:57 ` ctice at gcc dot gnu.org [this message]
2015-09-28 10:46 ` rguenth at gcc dot gnu.org
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