From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 28300 invoked by alias); 10 Mar 2003 22:37:44 -0000 Mailing-List: contact gcc-prs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Archive: List-Post: List-Help: Sender: gcc-prs-owner@gcc.gnu.org Received: (qmail 28281 invoked by uid 48); 10 Mar 2003 22:37:43 -0000 Date: Mon, 10 Mar 2003 22:37:00 -0000 Message-ID: <20030310223743.28280.qmail@sources.redhat.com> To: gcc-bugs@gcc.gnu.org, gcc-prs@gcc.gnu.org, khindenburg@cherrynebula.net, nobody@gcc.gnu.org From: jason@gcc.gnu.org Reply-To: jason@gcc.gnu.org, gcc-bugs@gcc.gnu.org, gcc-prs@gcc.gnu.org, khindenburg@cherrynebula.net, nobody@gcc.gnu.org, gcc-gnats@gcc.gnu.org Subject: Re: optimization/9123: [3.2/3.3/3.4 regression ] Internal compiler error in do_SUBST at combine.c:434 X-SW-Source: 2003-03/txt/msg00519.txt.bz2 List-Id: Synopsis: [3.2/3.3/3.4 regression ] Internal compiler error in do_SUBST at combine.c:434 State-Changed-From-To: analyzed->open State-Changed-By: jason State-Changed-When: Mon Mar 10 22:37:43 2003 State-Changed-Why: Not a c++-specific bug; it's dying because it's trying to substitute (unsigned char)-1 for a QI reg, but combine doesn't like that because (HOST_WIDE_INT)255 != (HOST_WIDE_INT)-1. Here's a C testcase: typedef unsigned char T; inline T clamp (T in, T min, T max) { return in <= min ? min : in >= max ? max : in; } unsigned char f (int i) { return clamp (i, 0, 255); } http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=9123