Regressions on trunk at revision 217483 vs revision 217458

[H.J. Lu x32]

New failures:

New passes:
FAIL: g++.dg/ipa/devirt-47.C  -std=gnu++11  scan-ipa-dump-times inline "Discovered a virtual call to a known target[^\\n]*C::_ZTh" 1
FAIL: g++.dg/ipa/devirt-47.C  -std=gnu++14  scan-ipa-dump-times inline "Discovered a virtual call to a known target[^\\n]*C::_ZTh" 1
FAIL: g++.dg/ipa/devirt-47.C  -std=gnu++98  scan-ipa-dump-times inline "Discovered a virtual call to a known target[^\\n]*C::_ZTh" 1