[Bug optimization/13759] New: [tree-ssa] consecutive stores to the same structure field not removed

["dann at godzilla dot ics dot uci dot edu" <gcc-bugzilla at gcc dot gnu dot org>]

struct s
{
  int s;
  char p;
  int arr[10];
};

int foo0 (struct s * f)
{
  f->s = 1;
  f->s = 2;
}

the .optimized dump when compiling with -O2 is: 

foo0 (f)
{
<bb 0>:
  f->s = 1; /* This should be eliminated*/
  f->s = 2;
  return;

}

-- 
           Summary: [tree-ssa] consecutive stores to the same structure
                    field not removed
           Product: gcc
           Version: tree-ssa
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: dann at godzilla dot ics dot uci dot edu
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13759