Regressions on trunk at revision 231405 vs revision 231394

[Bill Seurer]

New failures:

New passes:
FAIL: gfortran.dg/pr68627.f   -O  (test for excess errors)
UNRESOLVED: gfortran.dg/pr68627.f   -O   scan-assembler-not vbroadcastsd[ \\\\t]+%xmm[0-9]+, %ymm[0-9]+