[Bug tree-optimization/24021] New: VRP does not work with floating points

[pinskia at gcc dot gnu dot org]

Take the following example:
double BG_SplineLength ()
{
  double lastPoint;
  double i;

  for (i = 0.01;i<=1;i+=0.1f)
    if (!(i != 0.0))
      {
	lastPoint = i;
      }
    else
      {
        lastPoint = 2;
      }
  return lastPoint;
}

The loop is useless and we should remove the loop and make the function just return 2.0;

-- 
           Summary: VRP does not work with floating points
           Product: gcc
           Version: 4.1.0
            Status: UNCONFIRMED
          Keywords: missed-optimization
          Severity: enhancement
          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=24021