[Bug tree-optimization/15596] New: [3.5 Regression] Missed optimization with bitfields

["pinskia at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

Source:
typedef struct {
  int a : 20;
  int b : 1;
  int c : 1;
  int d : 1;
} bitstr;

bitstr fun(int s, int l)
{
  bitstr res;
  res.a  = s;
  res.b  = 1;
  res.c  = 0;
  res.d  = l;
  return res;
}

This is caused by the nrv optimization.

-- 
           Summary: [3.5 Regression] Missed optimization with bitfields
           Product: gcc
           Version: 3.5.0
            Status: UNCONFIRMED
          Keywords: missed-optimization
          Severity: critical
          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
GCC target triplet: powerpc-apple-darwin


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15596