Regressions on trunk at revision 211906 vs revision 211893

[Denis Larionov [ia32 Core AVX2]]

New failures:
FAIL: c-c++-common/pr61553.c -std=c++11 (test for excess errors)
FAIL: c-c++-common/pr61553.c -std=c++1y (test for excess errors)
FAIL: c-c++-common/pr61553.c -std=c++98 (test for excess errors)
FAIL: c-c++-common/pr61553.c  -Wc++-compat  (test for excess errors)
FAIL: gcc.dg/vect/bb-slp-pattern-1.c -flto -ffat-lto-objects  scan-tree-dump-times slp2 "pattern recognized" 8
FAIL: gcc.dg/vect/bb-slp-pattern-1.c -flto -ffat-lto-objects  scan-tree-dump-times slp2 "vect_recog_widen_mult_pattern: detected" 8
FAIL: gcc.dg/vect/bb-slp-pattern-1.c scan-tree-dump-times slp2 "pattern recognized" 8
FAIL: gcc.dg/vect/bb-slp-pattern-1.c scan-tree-dump-times slp2 "vect_recog_widen_mult_pattern: detected" 8

New passes:
FAIL: gcc.dg/vect/bb-slp-pattern-1.c -flto -ffat-lto-objects  scan-tree-dump-times slp "pattern recognized" 8
FAIL: gcc.dg/vect/bb-slp-pattern-1.c -flto -ffat-lto-objects  scan-tree-dump-times slp "vect_recog_widen_mult_pattern: detected" 8
FAIL: gcc.dg/vect/bb-slp-pattern-1.c scan-tree-dump-times slp "pattern recognized" 8
FAIL: gcc.dg/vect/bb-slp-pattern-1.c scan-tree-dump-times slp "vect_recog_widen_mult_pattern: detected" 8