Regressions on 4.5 at revision 165220 vs revision 165213

[H.J. Lu ia64]

New failures:

New passes:
FAIL: 25_algorithms/stable_partition/requirements/explicit_instantiation/2.cc (test for excess errors)
FAIL: gcc.c-torture/compile/limits-blockid.c  -O2 -flto  (test for excess errors)
FAIL: gcc.c-torture/execute/builtins/strlen-2.c compilation,  -O2 -fwhopr 
WARNING: program timed out.
WARNING: program timed out.
WARNING: program timed out.