Regressions on trunk at revision 217089 vs revision 217082

[H.J. Lu Intel64 Core i7]

New failures:
FAIL: g++.dg/ipa/devirt-40.C  -std=gnu++14  scan-tree-dump fre2 "converting indirect call to function virtual UnicodeString"
FAIL: g++.dg/ipa/devirt-40.C  -std=gnu++14  scan-tree-dump fre2 "converting indirect call to function virtual UnicodeString"
FAIL: g++.dg/ipa/devirt-42.C  -std=gnu++14  scan-tree-dump-times optimized "return 2" 2
FAIL: g++.dg/ipa/devirt-42.C  -std=gnu++14  scan-tree-dump-times optimized "return 2" 2

New passes:
FAIL: g++.dg/ipa/devirt-40.C  -std=gnu++1y  scan-tree-dump fre2 "converting indirect call to function virtual UnicodeString"
FAIL: g++.dg/ipa/devirt-40.C  -std=gnu++1y  scan-tree-dump fre2 "converting indirect call to function virtual UnicodeString"
FAIL: g++.dg/ipa/devirt-42.C  -std=gnu++1y  scan-tree-dump-times optimized "return 2" 2
FAIL: g++.dg/ipa/devirt-42.C  -std=gnu++1y  scan-tree-dump-times optimized "return 2" 2