[Bug tree-optimization/50014] New: [4.7 Regression] Assertion failed in vect_get_vec_def_for_stmt_copy

["d.g.gorbachev at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50014

           Summary: [4.7 Regression] Assertion failed in
                    vect_get_vec_def_for_stmt_copy
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: d.g.gorbachev@gmail.com
            Target: i686-pc-linux-gnu


Created attachment 24939
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=24939
Backtrace

Compile with `-O3 -march=pentium4':

int f(unsigned char *s, int n)
{
  int sum = 0;
  int i;

  for (i = 0; i < n; i++)
    sum += 256 * s[i];

  return sum;
}