Regressions on trunk at revision 250370 vs revision 250362

[H.J. Lu ia32]

New failures:

New passes:
FAIL: g++.dg/ext/sync-4.C  -std=gnu++11 execution test
FAIL: g++.dg/ext/sync-4.C  -std=gnu++14 execution test
FAIL: g++.dg/ext/sync-4.C  -std=gnu++98 execution test