Regressions on trunk at revision 232033 vs revision 232027

[H.J. Lu x32]

New failures:

New passes:
ERROR: gfortran.dg/default_format_denormal_2.f90   -O0 : unknown dg option: check_effective_target_powerpc* for " dg-do 1 run { xfail powerpc* } "
ERROR: gfortran.dg/default_format_denormal_2.f90   -O1 : unknown dg option: check_effective_target_powerpc* for " dg-do 1 run { xfail powerpc* } "
ERROR: gfortran.dg/default_format_denormal_2.f90   -O2 : unknown dg option: check_effective_target_powerpc* for " dg-do 1 run { xfail powerpc* } "
ERROR: gfortran.dg/default_format_denormal_2.f90   -O3 -fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions : unknown dg option: check_effective_target_powerpc* for " dg-do 1 run { xfail powerpc* } "
ERROR: gfortran.dg/default_format_denormal_2.f90   -O3 -g : unknown dg option: check_effective_target_powerpc* for " dg-do 1 run { xfail powerpc* } "
ERROR: gfortran.dg/default_format_denormal_2.f90   -Os : unknown dg option: check_effective_target_powerpc* for " dg-do 1 run { xfail powerpc* } "