Regressions on trunk at revision 168545 vs revision 168539

[H.J. Lu ia32]

New failures:
FAIL: gfortran.dg/defined_operators_1.f90  -O   (test for errors, line 14)
FAIL: gfortran.dg/defined_operators_1.f90  -O  (test for excess errors)
FAIL: gfortran.dg/interface_33.f90  -O  (test for excess errors)

New passes: