[Bug bootstrap/81638] [7 Regression] AIX bootstrap failure due to Recover GOTO predictor

["pinskia at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81638

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Just for reference we have:
      for (i = 0; i < vec->count; ++i)
 {
   incl = (struct xcoff_incl *) vec->vec.base + i;
   if (incl->begin <= lnnoptr && lnnoptr <= incl->end)
     break;
 }
      if (begincl == -1)
 begincl = (i < vec->count);
      if (i < vec->count)
 {
   filename = incl->filename;
   if (begincl == 1)
     lnno += fcn_lnno - 1;
 }
      else
 lnno += fcn_lnno - 1;

Hmm, if i == 0 and vec->count is 0, then incl can be uninitialized.

I can't find a way for GCC to know vec->count is non zero here ...  Unless I
miss something.