Regressions on trunk at revision 243777 vs revision 243775

[H.J. Lu x32]

New failures:

New passes:
FAIL: gfortran.dg/fimplicit_none_1.f90   -O  (internal compiler error)
FAIL: gfortran.dg/fimplicit_none_1.f90   -O   (test for errors, line 3)
FAIL: gfortran.dg/fimplicit_none_1.f90   -O   (test for errors, line 4)
FAIL: gfortran.dg/fimplicit_none_1.f90   -O   (test for errors, line 5)
FAIL: gfortran.dg/fimplicit_none_1.f90   -O  (test for excess errors)
FAIL: gfortran.dg/fimplicit_none_2.f90   -O  (internal compiler error)
FAIL: gfortran.dg/fimplicit_none_2.f90   -O   (test for errors, line 5)
FAIL: gfortran.dg/fimplicit_none_2.f90   -O  (test for excess errors)