Re: Bootstrap Failure on i686-pc-linux-gnu

[Andrew Pinski <pinskia at physics dot uc dot edu>]

On Dec 1, 2004, at 9:42 AM, Kaz Kojima wrote:

> kenner@vlsi1.ultra.nyu.edu (Richard Kenner) wrote:
> > From the place it's blowing up, it doesn't seem related to me, but 
> > it's
> > hard to say with the debugger not giving useful values.
> >
> > Does anybody else have this problem?
>
> I see the same error on x86 cross sh4-unknown-linux-gnu.  gdb says:
>
> Program received signal SIGSEGV, Segmentation fault.
> 0x0812ac21 in compute_points_to_and_addr_escape (ai=0x98915f0)
>     at ../../LOCAL/gcc/gcc/tree-ssa-alias.c:749
> 749                   bitmap_set_bit (ai->written_vars, ann->uid);
>
> (gdb) p ann
> $1 = 0x2f746f6f
>
> (gdb) call debug_tree (op)
>  <var_decl 0xbd8b8e0c TMT.1024 ....
>
> (gdb) p var
> $3 = 0x9803da0
>
> It looks this VAR is a garbage.

VAR is garbage because we just took SSA_NAME_VAR of non SSA_NAME.
I already looked into what is causing this.
See PR 18746, I put some of my analysis while tracking down this bug
in there.

Thanks,
Andrew Pinski