Regressions on trunk at revision 160531 vs revision 160526

[H.J. Lu Intel64]

New failures:
FAIL: Thread_Sleep_2 -O3 output - source compiled test
FAIL: Thread_Sleep_2 -findirect-dispatch output - source compiled test
FAIL: Thread_Sleep_2 output - source compiled test

New passes:
FAIL: g++.dg/torture/pr32304.C  -O3 -g  (internal compiler error)
FAIL: g++.dg/torture/pr32304.C  -O3 -g  (internal compiler error)
FAIL: g++.dg/torture/pr32304.C  -O3 -g  (test for excess errors)
FAIL: g++.dg/torture/pr32304.C  -O3 -g  (test for excess errors)