Regressions on trunk at revision 194392 vs revision 194388

[H.J. Lu ia32 Core 2/i7]

New failures:
FAIL: g++.dg/asan/asan_test.C  -O2  AddressSanitizer_PthreadExitTest execution test

New passes:
FAIL: g++.dg/asan/asan_test.C  -O2  AddressSanitizer_BuiltinLongJmpTest execution test
FAIL: g++.dg/asan/asan_test.C  -O2  AddressSanitizer_LongJmpTest execution test
FAIL: g++.dg/asan/asan_test.C  -O2  AddressSanitizer_SigLongJmpTest execution test