[Bug middle-end/38587] [4.4 Regression] psim miscompiled #2

["hjl dot tools at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #18 from hjl dot tools at gmail dot com  2009-01-19 23:35 -------
(In reply to comment #11)
> (In reply to comment #6)
> > Can you attach preprocessed source of idecode.c at least?  Can you track down
> > where in idecode.c the bug is and wrap a main () around that piece, making it
> > an executable testcase?
> 
> psim is automatically generated code.  I have no idea how to narrow it down
> to an executable test case.  I included my gdb configuration, psim
> test program, and preprocessed source.  I will upload the script I
> am using to run it since you have to have a device tree.
> 
> Hmmm... this is the code where the assert happens:
> 
>   /* now establish the restart target */
>   psim_set_halt_and_restart(system, &halt, &restart);
>   if (setjmp(restart)) {
>     current_cpu = psim_last_cpu(system);
>     ASSERT(current_cpu >= 0 && current_cpu < nr_cpus);
>   }
> 
> Is it possible that setjmp/longjmp is not preserving a register that
> gcc x86_64 is now using?
> 

This is an IRA bug. -fno-ira fixes it. This may be caused by revision
139996:

http://gcc.gnu.org/ml/gcc-patches/2008-09/msg00315.html


-- 

hjl dot tools at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |vmakarov at redhat dot com
           Keywords|                            |ra, wrong-code
   Last reconfirmed|0000-00-00 00:00:00         |2009-01-19 23:35:49
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38587