[Bug tree-optimization/31345] New: [4.3 Regression] ICE in in set_value_range, at tree-vrp.c:269

["tbm at cyrius dot com" <gcc-bugzilla@gcc.gnu.org>]

Hi Ian,

Your fix for PR31034 worked for 18 out of 20 affected applications in Debian,
but there are 2 applications that still exhibit a related ICE:

tbm@coconut0:~$ /usr/lib/gcc-snapshot/bin/gcc -c -O2 qdbm-depot.c
qdbm-depot.c: In function 'dpsnaffle':
qdbm-depot.c:2: internal compiler error: in set_value_range, at tree-vrp.c:269
Please submit a full bug report,
with preprocessed source if appropriate.

Test case:
dpsnaffle (const char *kbuf)
{
  int hash, thash, head[2], off;
    {
      int _DP_i;
      (hash) = 19780211;
        {
          (hash) = (hash) + (kbuf)[_DP_i];
        }
      (hash) = ((hash) * 43321879) & 0x7FFFFFFF;
    }
  while (off != 0)
    {
      if (hash > thash) {}
      else if (hash < thash)
        {
          off = head[2];
        }
    }
}


-- 
           Summary: [4.3 Regression] ICE in  in set_value_range, at tree-
                    vrp.c:269
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: tbm at cyrius dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31345