From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 19331 invoked by alias); 1 Aug 2012 18:39:23 -0000 Received: (qmail 19312 invoked by uid 22791); 1 Aug 2012 18:39:22 -0000 X-SWARE-Spam-Status: No, hits=-4.3 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00,KHOP_THREADED X-Spam-Check-By: sourceware.org Received: from localhost (HELO gcc.gnu.org) (127.0.0.1) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Wed, 01 Aug 2012 18:39:08 +0000 From: "mikael at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug fortran/45586] [4.8 Regression] ICE non-trivial conversion at assignment Date: Wed, 01 Aug 2012 18:39:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: fortran X-Bugzilla-Keywords: ice-checking, ice-on-valid-code, lto, wrong-code X-Bugzilla-Severity: normal X-Bugzilla-Who: mikael at gcc dot gnu.org X-Bugzilla-Status: REOPENED X-Bugzilla-Priority: P4 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: 4.8.0 X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated Content-Type: text/plain; charset="UTF-8" MIME-Version: 1.0 Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org X-SW-Source: 2012-08/txt/msg00067.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45586 --- Comment #81 from Mikael Morin 2012-08-01 18:37:55 UTC --- (In reply to comment #79) > If that's valid then you can make the middle-end happy by wrapping > the RHS inside a VIEW_CONVERT_EXPR with the LHS type. OK. will try. I don't know yet though how to limit that to the very cases where it is necessary. (In reply to comment #80) > I have not closely looked at the dump, however, > this%y = this%find_y() > means that one assigns component-wise the values from the RHS to the LHS; if > there are pointer components, the pointer address is assigned; if there are > allocatable components, those are - if needed - first (re)allocated and then > (element-wise) assigned. > > Thus, one only assigns the values and no pointers - and, hence, the RHS can be > a nontarget while the LHS can be a target. > Actually, there is a wrong-code bug about exactly this line (see bugs #47455 and #47586). But I think that even if there wasn't, the middle-end wouldn't be happy about it. The values are assigned component-wise, and that's the only way the middle-end would accept it.