Regressions on trunk at revision 179993 vs revision 179977

[H.J. Lu Intel64 LTO/FDO]

New failures:

New passes:
FAIL: gcc.target/i386/warn-vect-op-1.c  (test for warnings, line 15)
FAIL: gcc.target/i386/warn-vect-op-1.c (test for excess errors)
FAIL: gcc.target/i386/warn-vect-op-3.c  (test for warnings, line 12)
FAIL: gcc.target/i386/warn-vect-op-3.c  (test for warnings, line 13)
FAIL: gcc.target/i386/warn-vect-op-3.c (test for excess errors)