Regressions on trunk at revision 206218 vs revision 206210

[H.J. Lu Intel64 Core i7]

New failures:

New passes:
FAIL: g++.dg/ext/mv1.C -std=gnu++11 execution test
FAIL: g++.dg/ext/mv1.C -std=gnu++11 execution test
FAIL: g++.dg/ext/mv1.C -std=gnu++98 execution test
FAIL: g++.dg/ext/mv1.C -std=gnu++98 execution test