Regressions on trunk at revision 211198 vs revision 211178

[i64coreavxi@ecsmtp.ims.intel.com]

New failures:

New passes:
FAIL: g++.dg/ext/mv14.C -std=gnu++11 execution test
FAIL: g++.dg/ext/mv14.C -std=gnu++11 execution test
FAIL: g++.dg/ext/mv14.C -std=gnu++1y execution test
FAIL: g++.dg/ext/mv14.C -std=gnu++1y execution test
FAIL: g++.dg/ext/mv14.C -std=gnu++98 execution test
FAIL: g++.dg/ext/mv14.C -std=gnu++98 execution test
FAIL: g++.dg/ext/mv15.C -std=gnu++11 execution test
FAIL: g++.dg/ext/mv15.C -std=gnu++11 execution test
FAIL: g++.dg/ext/mv15.C -std=gnu++1y execution test
FAIL: g++.dg/ext/mv15.C -std=gnu++1y execution test
FAIL: g++.dg/ext/mv15.C -std=gnu++98 execution test
FAIL: g++.dg/ext/mv15.C -std=gnu++98 execution test