Regressions on trunk at revision 224112 vs revision 224064

[H.J. Lu ia32]

New failures:

New passes:
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)