[Bug tree-optimization/18792] New: ICE with -O1 -ftree-loop-linear on small test case

[fjahanian at apple dot com]

Following small test case, extraced from a SPEC2004 benchmark ICEs when compiled with gcc-4.0
and -O1 -ftree-loop-linear

/* test */
void put_atoms_in_triclinic_unitcell(float x[][3])
{
  int i=0,d;

      while (x[i][3] < 0)
           for (d=0; d<=3; d++)
              x[i][d] = 0;

      while (x[i][3] >= 0)
           for (d=0; d<=3; d++)
              x[i][d] = 0;

}


% gcc-4.0 -c bad.c -O1 -ftree-loop-linear
bad.c: In function 'put_atoms_in_triclinic_unitcell':
bad.c:2: internal compiler error: in build_classic_dist_vector, at tree-data-ref.c:1871
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.

-- 
           Summary: ICE with -O1 -ftree-loop-linear on small test case
           Product: gcc
           Version: 4.0.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: fjahanian at apple dot com
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: apple-ppc-darwin
  GCC host triplet: apple-ppc-darwin
GCC target triplet: apple-ppc-darwin


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18792