Regressions on trunk at revision 224011 vs revision 223997

[Intel Automatic Testing System [ia32 Core AVXi]]

New failures:
FAIL: g++.dg/abi/mangle-regparm.C  -std=c++11 (test for excess errors)
FAIL: g++.dg/abi/mangle-regparm.C  -std=c++14 (test for excess errors)
FAIL: g++.dg/abi/mangle-regparm.C  -std=c++98 (test for excess errors)

New passes: