From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id D62D938515D4; Wed, 31 Mar 2021 14:40:10 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org D62D938515D4 From: "m.frohiky at gmail dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug target/99847] Optimization breaks alignment on CPU32 Date: Wed, 31 Mar 2021 14:40:10 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: target X-Bugzilla-Version: 10.2.1 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: m.frohiky at gmail dot com X-Bugzilla-Status: WAITING X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: gcc-bugs@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-bugs mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 31 Mar 2021 14:40:10 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D99847 --- Comment #2 from =E2=8E=93 --- The same thing is with other way around. I.e.: void ntoh(uint16_t idata, uint8_t *odata) { odata[0] =3D idata >> 8; odata[1] =3D idata & 0xff; } results with: move.l 8(%sp),%a0 move.w 6(%sp),(%a0) rts I've tried with both -mstrict-align and -mno-strict-align and there are no differences in the produced assembly file (generated with -S).=