Regressions on trunk at revision 251368 vs revision 251362

[H.J. Lu]

New failures:
FAIL: ext/mt_allocator/tune-1.cc execution test
FAIL: ext/mt_allocator/tune-1.cc (test for excess errors)
FAIL: gcc.dg/special/gcsec-1.c execution test
FAIL: gcc.dg/special/gcsec-1.c (test for excess errors)
FAIL: g++.dg/ext/mv21.C  -std=gnu++11 execution test
FAIL: g++.dg/ext/mv21.C  -std=gnu++11 (test for excess errors)
FAIL: g++.dg/ext/mv21.C  -std=gnu++14 execution test
FAIL: g++.dg/ext/mv21.C  -std=gnu++14 (test for excess errors)
FAIL: g++.dg/ext/mv21.C  -std=gnu++98 execution test
FAIL: g++.dg/ext/mv21.C  -std=gnu++98 (test for excess errors)
FAIL: g++.dg/ext/mv22.C  -std=gnu++11 execution test
FAIL: g++.dg/ext/mv22.C  -std=gnu++11 (test for excess errors)
FAIL: g++.dg/ext/mv22.C  -std=gnu++14 execution test
FAIL: g++.dg/ext/mv22.C  -std=gnu++14 (test for excess errors)
FAIL: g++.dg/ext/mv22.C  -std=gnu++98 execution test
FAIL: g++.dg/ext/mv22.C  -std=gnu++98 (test for excess errors)
FAIL: g++.dg/ext/mv23.C  -std=gnu++11 execution test
FAIL: g++.dg/ext/mv23.C  -std=gnu++11 (test for excess errors)
FAIL: g++.dg/ext/mv23.C  -std=gnu++14 execution test
FAIL: g++.dg/ext/mv23.C  -std=gnu++14 (test for excess errors)
FAIL: g++.dg/ext/mv23.C  -std=gnu++98 execution test
FAIL: g++.dg/ext/mv23.C  -std=gnu++98 (test for excess errors)
FAIL: g++.dg/template/repo9.C  -std=gnu++14 (test for excess errors)

New passes:
FAIL: gcc.dg/tree-prof/cmpsf-1.c scan-tree-dump-times dom2 "if " 3