target/8343: m68k-elf/rtems ICE at instantiate_virtual_regs_1

[Graham Stott]

joel@gcc.gnu.org wrote:
> Synopsis: m68k-elf/rtems ICE at instantiate_virtual_regs_1
> 
> State-Changed-From-To: open->feedback
> State-Changed-By: joel
> State-Changed-When: Fri Oct 25 05:59:45 2002
> State-Changed-Why:
>     Peter Barada has this important piece of information which
>     should be a big clue to fixing it:
>     
>     Ok, I've narrowed your ICE down to between two version, one 525 days
>     ago(where it worked) and 523 days ago (where it failed).
>     
>     The verion from each is:
>     
>     Fail: version 3.1 20010519
>     Work: version 3.1 20010517
>     
> 
> http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=8343
> 

The original test case can be cut down to the following
which fails at -O0 on cvs head
----------------------------------------------------------
extern unsigned foo;

unsigned long long
bar (void)
{
   unsigned long long t = foo;

   return t * foo;
}
----------------------------------------------------------