Regressions on trunk at revision 262596 vs revision 262591

[H.J. Lu Intel64 Core i7]

New failures:
FAIL: g++.dg/warn/pr86453.C  -std=c++11 (test for excess errors)
FAIL: g++.dg/warn/pr86453.C  -std=c++11 (test for excess errors)
FAIL: g++.dg/warn/pr86453.C  -std=c++11  (test for warnings, line 4)
FAIL: g++.dg/warn/pr86453.C  -std=c++11  (test for warnings, line 4)
FAIL: g++.dg/warn/pr86453.C  -std=c++14 (test for excess errors)
FAIL: g++.dg/warn/pr86453.C  -std=c++14 (test for excess errors)
FAIL: g++.dg/warn/pr86453.C  -std=c++14  (test for warnings, line 4)
FAIL: g++.dg/warn/pr86453.C  -std=c++14  (test for warnings, line 4)
FAIL: g++.dg/warn/pr86453.C  -std=c++98 (test for excess errors)
FAIL: g++.dg/warn/pr86453.C  -std=c++98 (test for excess errors)
FAIL: g++.dg/warn/pr86453.C  -std=c++98  (test for warnings, line 4)
FAIL: g++.dg/warn/pr86453.C  -std=c++98  (test for warnings, line 4)

New passes:
FAIL: gcc.target/i386/avx512vl-vpclmulqdq-2.c (test for excess errors)
FAIL: gcc.target/i386/avx512vl-vpclmulqdq-2.c (test for excess errors)