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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
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D112415

--- 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 all=
ows
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 regist=
ers
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.=