Regressions on trunk at revision 268045 vs revision 268036

[H.J. Lu (ia32 Core i7)]

New failures:
FAIL: gfortran.dg/gomp/declare-simd-2.f90   -O   (test for warnings, line 15)
FAIL: gfortran.dg/gomp/declare-simd-2.f90   -O   (test for warnings, line 3)
FAIL: gfortran.dg/gomp/pr79154-1.f90   -O   (test for warnings, line 23)
FAIL: gfortran.dg/gomp/pr79154-1.f90   -O   (test for warnings, line 4)
FAIL: gfortran.dg/gomp/pr83977.f90   -O   (test for warnings, line 4)

New passes: