Regressions on trunk at revision 256266 vs revision 256254

[H.J. Lu Intel64 Core i7]

New failures:

New passes:
FAIL: g++.dg/ipa/pr82352.C  -std=gnu++11 (test for excess errors)
FAIL: g++.dg/ipa/pr82352.C  -std=gnu++14 (test for excess errors)
FAIL: g++.dg/ipa/pr82352.C  -std=gnu++98 (test for excess errors)