From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 8027 invoked by alias); 4 Feb 2004 14:04:59 -0000 Mailing-List: contact gcc-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Archive: List-Post: List-Help: Sender: gcc-owner@gcc.gnu.org Received: (qmail 8018 invoked from network); 4 Feb 2004 14:04:59 -0000 Received: from unknown (HELO Cantor.suse.de) (195.135.220.2) by sources.redhat.com with SMTP; 4 Feb 2004 14:04:59 -0000 Received: from hermes.suse.de (Hermes.suse.de [195.135.221.8]) (using TLSv1 with cipher EDH-RSA-DES-CBC3-SHA (168/168 bits)) (No client certificate requested) by Cantor.suse.de (Postfix) with ESMTP id C6C9012A2DA; Wed, 4 Feb 2004 15:00:10 +0100 (CET) Received: by wotan.suse.de (Postfix, from userid 10510) id 466DC10681; Wed, 4 Feb 2004 15:00:10 +0100 (CET) Received: from localhost (localhost [127.0.0.1]) by wotan.suse.de (Postfix) with ESMTP id 4007210668; Wed, 4 Feb 2004 15:00:10 +0100 (CET) Date: Wed, 04 Feb 2004 14:04:00 -0000 From: Michael Matz To: "S. Bosscher" Cc: "'kenner@vlsi1.ultra.nyu.edu '" , "'paolo.bonzini@polimi.it '" , "'gcc@gcc.gnu.org '" Subject: RE: What to remove after tree-ssa is merged? In-Reply-To: <4195D82C2DB1D211B9910008C7C9B06F01F3741E@lr0nt3.lr.tudelft.nl> Message-ID: References: <4195D82C2DB1D211B9910008C7C9B06F01F3741E@lr0nt3.lr.tudelft.nl> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-SW-Source: 2004-02/txt/msg00238.txt.bz2 Hi, On Wed, 4 Feb 2004, S. Bosscher wrote: > But since Ada is lagging, like, three years on the rest of GCC, > and nobody so far has explained what PLACEHOLDER_EXPR is for It's not that Kenner is totally wrong with documentation ;-) PLACEHOLDER_EXPR is described in tree.def and is used for types whose layout/content changes with values of members in such type. Like pseudo-type: type T { switch enum BLA discriminator { VARIANT_1 : int i; char c; VARIANT_2 : char d; long l; } } Here the offset of T.c (or even it's existance) depends on the value of T.discriminator. Ciao, Michael.