Regressions on trunk at revision 209179 vs revision 209138

[H.J. Lu ia32]

New failures:

New passes:
FAIL: gfortran.dg/warn_conversion_4.f90  -O  (test for excess errors)
FAIL: gfortran.dg/warn_conversion_4.f90  -O   (test for warnings, line 14)
FAIL: gfortran.dg/warn_conversion_4.f90  -O   (test for warnings, line 15)
FAIL: gfortran.dg/warn_conversion_4.f90  -O   (test for warnings, line 16)