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[Bug tree-optimization/32120] New: missed PRE/FRE of a*2+4 and (a+2)*2

A testcase which we should optimize all the way to return true:
int f(int a, int b)
{
  int c = a+2;
  int d = c*2;
  int e = a*2;
  int f = e+4;
  return d == f;
}


-- 
           Summary: missed PRE/FRE of a*2+4 and (a+2)*2
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Keywords: missed-optimization
          Severity: enhancement
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: pinskia at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32120
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