[Bug middle-end/49308] [4.7 Regression] segfault in rest_of_handle_ud_dce () at gcc/gcc/dce.c:518

[Joost.VandeVondele at pci dot uzh.ch]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49308

--- Comment #2 from Joost VandeVondele <Joost.VandeVondele at pci dot uzh.ch> 2011-06-07 07:12:14 UTC ---
(In reply to comment #1)
> http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=174699
> then.  What does:
> p *defs
> p *defs->ref
> say?

strangely

(gdb) list
513                   df_ref use = *use_rec;
514                   struct df_link *defs;
515                   for (defs = DF_REF_CHAIN (use); defs; defs = defs->next)
516                     {
517                       rtx insn;
518                       if (DF_REF_IS_ARTIFICIAL (defs->ref))
519                         continue;
520                       insn = DF_REF_INSN (defs->ref);
521                       if (!marked_insn_p (insn))
522                         break;
(gdb) p *defs
No symbol "defs" in current context.