Re: optimization/8988: gcc3.2 and 3.2.1 with -O2 and -mcpu=i386 generates code that segfaults

[caf@guarana.org]

The following reply was made to PR optimization/8988; it has been noted by GNATS.

From: caf@guarana.org
To: paolo@gcc.gnu.org, gcc-bugs@gcc.gnu.org, gcc-prs@gcc.gnu.org,
	kevin@sylandro.com, nobody@gcc.gnu.org, gcc-gnats@gcc.gnu.org
Cc:  
Subject: Re: optimization/8988: gcc3.2 and 3.2.1 with -O2 and -mcpu=i386 generates code that segfaults
Date: Thu, 19 Dec 2002 00:37:16 +1100

 On Wed, Dec 18, 2002 at 12:54:39PM -0000, paolo@gcc.gnu.org wrote:
 > Synopsis: gcc3.2 and 3.2.1 with -O2 and -mcpu=i386 generates code that segfaults
 > 
 > State-Changed-From-To: open->feedback
 > State-Changed-By: paolo
 > State-Changed-When: Wed Dec 18 04:54:38 2002
 > State-Changed-Why:
 >     For some reason, the attachment got lost. Could you possibly
 >     provide it again?
 >     Thanks, Paolo.
 > 
 > http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=8988
 
 Preprocessed output attached.
 
 By the way, the bad assembly that causes the crash is:
 
 .L8:
         leal    1(%ecx), %edx
         xorl    %ecx, %ecx		; %ecx is 0
         .p2align 2,,3
 .L7:
         movl    %edx, %eax
         movl    %edx, -28(%ebp)
         leal    2(%ecx), %edx		; %edx is 2
         movl    %eax, %ecx
         movb    -1(%edx), %al		; we try to read from 0x00000001
 
 	- Kevin.