Regressions on 4.5 at revision 163755 vs revision 163712

[H.J. Lu ia64]

New failures:
FAIL: gcc.c-torture/compile/960704-1.c  -O3 -g  (test for excess errors)
FAIL: gcc.c-torture/execute/struct-ini-2.c compilation,  -O2 -flto 

New passes:
FAIL: gcc.c-torture/compile/pr28675.c  -O3 -fomit-frame-pointer  (test for excess errors)
FAIL: gcc.c-torture/execute/builtins/pr22237.c compilation,  -O3 -fomit-frame-pointer 
FAIL: tr1/5_numerical_facilities/random/subtract_with_carry/operators/not_equal.cc (test for excess errors)
WARNING: program timed out.
WARNING: program timed out.