[Bug tree-optimization/21000] New: store should not be done if we don't change its value

[pinskia at gcc dot gnu dot org]

Like PR 20999 but this time the function should be empty which it is on the RTL 
level:
int i;
void f()
{
  int t = i;
  i = t;
}

-- 
           Summary: store should not be done if we don't change its value
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Keywords: missed-optimization, TREE
          Severity: normal
          Priority: P2
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: pinskia at gcc dot gnu dot org
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21000