[Bug tree-optimization/51988] value_replacement in PHIOPT should handle even the cases where there are other PHIs even with non equal value

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51988

--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> 2012-01-25 
00:45:37 UTC ---
Here is another testcase which also fails:
int g(int,int);
int f(int t, int c)
{
  int d = 0;
  int e = 0;
  if (t)
    {
      d = c+1;
      e = t;
    }
  else d = 0, e = 0;
  return g(d,e);
}