From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugs-return-274709-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 22843 invoked by alias); 1 Feb 2009 10:58:10 -0000
Received: (qmail 22822 invoked by uid 48); 1 Feb 2009 10:57:59 -0000
Date: Sun, 01 Feb 2009 10:58:00 -0000
Subject: [Bug inline-asm/39058]  New: [4.3/4.4 regression] ICE with double in inline-asm
X-Bugzilla-Reason: CC
Message-ID: <bug-39058-1771@http.gcc.gnu.org/bugzilla/>
Reply-To: gcc-bugzilla@gcc.gnu.org
To: gcc-bugs@gcc.gnu.org
From: "reichelt at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>
Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Id: <gcc-bugs.gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-help@gcc.gnu.org>
Sender: gcc-bugs-owner@gcc.gnu.org
X-SW-Source: 2009-02/txt/msg00024.txt.bz2

The following (IMHO valid) code snippet triggers an ICE since GCC 4.3.0
when compiled with "-O":

========================================
double foo()
{
  double x;
  asm("" : "=r,r"(x) : "0,0"(x));
  return x;
}
========================================

bug.c: In function 'foo':
bug.c:5: internal compiler error: in reg_overlap_mentioned_p, at rtlanal.c:1393
Please submit a full bug report, [etc.]

The same code compiles fine if I use float instead of double.


-- 
           Summary: [4.3/4.4 regression] ICE with double in inline-asm
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code, monitored
          Severity: normal
          Priority: P3
         Component: inline-asm
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: reichelt at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39058