From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id DFCE43894C1D; Fri, 23 Apr 2021 04:28:39 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org DFCE43894C1D From: "ppalka at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/100209] multiple inheritance with crtp pattern fails on sequentioal member access Date: Fri, 23 Apr 2021 04:28:39 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: c++ X-Bugzilla-Version: 10.2.1 X-Bugzilla-Keywords: rejects-valid X-Bugzilla-Severity: normal X-Bugzilla-Who: ppalka at gcc dot gnu.org X-Bugzilla-Status: NEW 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: Fri, 23 Apr 2021 04:28:40 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D100209 --- Comment #3 from Patrick Palka --- During cxx_eval_indirect_ref for *(const struct C &) (const struct C *) (struct C *) ((struct B *) this + = -4); constant evaluation of the pointee yields &D.2217.D.2106 + -4 where D.2217 is a temporary of type C and D.2106 is the FIELD_DECL for the = base B. The problem seems to be that cxx_fold_indirect_ref doesn't know how = to fold this second expression to just &D.2217=