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From: "law at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/112415] [14 regression] Python 3.11 miscompiled on HPPA with new RTL fold mem offset pass, since r14-4664-g04c9cf5c786b94
Date: Mon, 13 Nov 2023 00:24:21 +0000	[thread overview]
Message-ID: <bug-112415-4-hR9LVOe7De@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-112415-4@http.gcc.gnu.org/bugzilla/>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112415

--- Comment #43 from Jeffrey A. Law <law at gcc dot gnu.org> ---
I would expect allowing larger offsets before reload to be a significant
problem.

The core issue is integer memory operations allow 14 bits while FP only allows
5.  During reloading we don't know if any given memory reference is FP or
integer.  xmpyu plays a role here too since it's going to require FP registers
in integer modes.

But what I don't understand is why f-m-o fails to push the offset into the
memory reference -- it should be conditional on the insn being recognized.  And
since it's after reload we know if we're doing an FP or integer load.

  parent reply	other threads:[~2023-11-13  0:24 UTC|newest]

Thread overview: 57+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-11-06 21:00 [Bug rtl-optimization/112415] New: [14 regression] Python 3.11 miscompiled " sjames at gcc dot gnu.org
2023-11-06 21:00 ` [Bug rtl-optimization/112415] [14 regression] Python 3.11 miscompiled on HPPA " sjames at gcc dot gnu.org
2023-11-06 21:01 ` sjames at gcc dot gnu.org
2023-11-06 21:03 ` pinskia at gcc dot gnu.org
2023-11-06 21:31 ` dave.anglin at bell dot net
2023-11-06 22:09 ` sjames at gcc dot gnu.org
2023-11-06 22:11 ` sjames at gcc dot gnu.org
2023-11-06 22:20 ` law at gcc dot gnu.org
2023-11-06 22:33 ` dave.anglin at bell dot net
2023-11-06 22:49 ` sjames at gcc dot gnu.org
2023-11-06 23:11 ` sjames at gcc dot gnu.org
2023-11-06 23:18 ` dave.anglin at bell dot net
2023-11-07 14:08 ` manolis.tsamis at vrull dot eu
2023-11-07 21:12 ` sjames at gcc dot gnu.org
2023-11-08  1:36 ` sjames at gcc dot gnu.org
2023-11-08  2:24 ` dave.anglin at bell dot net
2023-11-08 10:09 ` manolis.tsamis at vrull dot eu
2023-11-08 14:42 ` jeffreyalaw at gmail dot com
2023-11-08 18:59 ` dave.anglin at bell dot net
2023-11-08 19:07 ` pinskia at gcc dot gnu.org
2023-11-08 19:16 ` law at gcc dot gnu.org
2023-11-08 19:40 ` dave.anglin at bell dot net
2023-11-08 23:33 ` pinskia at gcc dot gnu.org
2023-11-08 23:40 ` danglin at gcc dot gnu.org
2023-11-08 23:51 ` sjames at gcc dot gnu.org
2023-11-09  0:00 ` dave.anglin at bell dot net
2023-11-09  0:02 ` sjames at gcc dot gnu.org
2023-11-09  0:07 ` law at gcc dot gnu.org
2023-11-09  0:08 ` dave.anglin at bell dot net
2023-11-09  0:23 ` dave.anglin at bell dot net
2023-11-09 18:04 ` danglin at gcc dot gnu.org
2023-11-09 19:17 ` danglin at gcc dot gnu.org
2023-11-09 20:28 ` law at gcc dot gnu.org
2023-11-09 20:41 ` dave.anglin at bell dot net
2023-11-09 23:41 ` danglin at gcc dot gnu.org
2023-11-11 19:40 ` danglin at gcc dot gnu.org
2023-11-11 19:51 ` sjames at gcc dot gnu.org
2023-11-11 20:00 ` danglin at gcc dot gnu.org
2023-11-11 20:06 ` danglin at gcc dot gnu.org
2023-11-11 20:19 ` sjames at gcc dot gnu.org
2023-11-11 21:54 ` danglin at gcc dot gnu.org
2023-11-12 15:05 ` danglin at gcc dot gnu.org
2023-11-12 15:54 ` law at gcc dot gnu.org
2023-11-12 23:59 ` danglin at gcc dot gnu.org
2023-11-13  0:24 ` law at gcc dot gnu.org [this message]
2023-11-13  9:33 ` manolis.tsamis at vrull dot eu
2023-11-13  9:37 ` manolis.tsamis at vrull dot eu
2023-11-13 13:20 ` manolis.tsamis at vrull dot eu
2023-11-13 15:06 ` dave.anglin at bell dot net
2023-11-13 15:26 ` manolis.tsamis at vrull dot eu
2023-11-13 21:46 ` danglin at gcc dot gnu.org
2023-11-16 17:43 ` cvs-commit at gcc dot gnu.org
2023-11-27 20:55 ` sjames at gcc dot gnu.org
2023-11-28 12:39 ` manolis.tsamis at vrull dot eu
2024-03-18  0:22 ` cvs-commit at gcc dot gnu.org
2024-03-18  0:39 ` danglin at gcc dot gnu.org
2024-03-22 13:34 ` law at gcc dot gnu.org

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