Regressions on trunk at revision 206310 vs revision 206308

[H.J. Lu Intel64]

New failures:
FAIL: g++.dg/tsan/cond_race.C  -O2  output pattern test, is ==================

New passes:
FAIL: gcc.dg/uninit-pred-8_b.c bogus warning (test for bogus messages, line 20)
FAIL: gcc.dg/uninit-pred-8_b.c bogus warning (test for bogus messages, line 20)
FAIL: gcc.dg/uninit-pred-9_b.c bogus warning (test for bogus messages, line 24)
FAIL: gcc.dg/uninit-pred-9_b.c bogus warning (test for bogus messages, line 24)