Regressions on trunk at revision 202825 vs revision 202819

[H.J. Lu Intel64]

New failures:
FAIL: g++.dg/asan/default-options-1.C  -O2  (test for excess errors)
FAIL: g++.dg/cpp0x/initlist49.C (test for excess errors)
FAIL: g++.dg/lto/20080709 cp_lto_20080709_0.o-cp_lto_20080709_0.o link, -O2 -flto -flto-partition=1to1 

New passes:
FAIL: c-c++-common/asan/heap-overflow-1.c  -O1  (test for excess errors)