[Bug tree-optimization/27798] New: gimplifying "return CONSTANT" creates unneeded temporaties

[dann at godzilla dot ics dot uci dot edu]

int zero { return 0; } 

is gimplified to: 

zero ()
{
  int D.2115;

  D.2115 = 0;
  return D.2115;
}

The D.2115 temporary is not needed, the return value is constant, it is of the
same type as the function return type, and return CONSTANT is valid 
gimple. 

Not creating the temporary should save some memory and processing time later.


-- 
           Summary: gimplifying "return CONSTANT" creates unneeded
                    temporaties
           Product: gcc
           Version: 4.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: dann at godzilla dot ics dot uci dot edu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27798