Regressions on trunk at revision 231819 vs revision 231812

[Bill Seurer]

New failures:
FAIL: gcc.dg/cpp/trad/directive.c  (test for errors, line 15)
FAIL: gcc.dg/cpp/trad/directive.c (test for excess errors)
FAIL: gcc.dg/vect/vect-reduc-dot-s8a.c -flto -ffat-lto-objects  scan-tree-dump-times vect "vect_recog_dot_prod_pattern: detected" 1
FAIL: gcc.dg/vect/vect-reduc-dot-s8a.c scan-tree-dump-times vect "vect_recog_dot_prod_pattern: detected" 1
FAIL: gcc.dg/vect/vect-reduc-dot-u8a.c -flto -ffat-lto-objects  scan-tree-dump-times vect "vect_recog_dot_prod_pattern: detected" 1
FAIL: gcc.dg/vect/vect-reduc-dot-u8a.c scan-tree-dump-times vect "vect_recog_dot_prod_pattern: detected" 1

New passes:
FAIL: gcc.dg/vect/vect-widen-mult-const-s16.c -flto -ffat-lto-objects  scan-tree-dump-times vect "pattern recognized" 2
FAIL: gcc.dg/vect/vect-widen-mult-const-s16.c scan-tree-dump-times vect "pattern recognized" 2
FAIL: gcc.dg/vect/vect-widen-mult-const-u16.c -flto -ffat-lto-objects  scan-tree-dump-times vect "pattern recognized" 2
FAIL: gcc.dg/vect/vect-widen-mult-const-u16.c scan-tree-dump-times vect "pattern recognized" 2