[Bug tree-optimization/51692] New: [4.7 Regression] ICE on several valgrind tests

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

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51692

             Bug #: 51692
           Summary: [4.7 Regression] ICE on several valgrind tests
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: jakub@gcc.gnu.org
            Target: x86_64-linux


int
main ()
{
  volatile double d = 0.0;
  double *p = __builtin_calloc (1, sizeof (double));
  d += 1.0;
  *p += 2.0;
  __builtin_free (p);
  return 0;
}

ICEs at -O2, the free argument becomes a freed SSA_NAME for some reason.
Started with http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=182009