optimization/6025: linux m68k-elf-gcc cross compiler segfault

[Anders Blomdell]

The following reply was made to PR optimization/6025; it has been noted by GNATS.

From: Anders Blomdell <anders.blomdell@control.lth.se>
To: gcc-gnats@gcc.gnu.org, gcc-prs@gcc.gnu.org, anders.blomdell@control.lth.se,
   gcc-bugs@gcc.gnu.org, nobody@gcc.gnu.org
Cc:  
Subject: Re: optimization/6025: linux m68k-elf-gcc cross compiler segfault
Date: Fri, 22 Mar 2002 13:39:49 +0100

 http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=6025
 
 OK, I have looked a little furter into this. The problem seems to be 
 in bb-reorder.c:415:
 
 	next = (taken ? e_taken : e_fall)->dest;
 
 the segfault occurs when we get here with:
 
    taken = 0, e_taken = 842a0b0, e_fall = 0
 
 (since (0 ? 842a0b0 : 0)->dest == (0)->dest, which is clearly illegal).
 
 Now, how do I do to find out why there is a block without a valid 
 fall-through path (mapping *.ce2 dump to basic block layout is beyond 
 my capacity).
 
 
 
 -- 
 ------------------------------------------------------------------------------
   Anders Blomdell
   Department of Automatic Control        Email: anders.blomdell@control.lth.se
   Lund Institute of Technology           Phone: +46 46 222 4625
   Box 118, S-221 00 Lund, Sweden         Fax:   +46 46 138118