Regressions on 4.5 at revision 162047 vs revision 162030

[H.J. Lu ia64]

New failures:
FAIL: gcc.c-torture/compile/990527-1.c  -O2 -flto  (test for excess errors)
FAIL: gfortran.dg/cray_pointers_2.f90  -Os  (test for excess errors)
FAIL: tr1/5_numerical_facilities/special_functions/18_laguerre/compile.cc (test for excess errors)
WARNING: program timed out.
WARNING: program timed out.
WARNING: program timed out.

New passes:
FAIL: gcc.dg/vect/vect-109.c scan-tree-dump-times vect "vectorized 1 loops" 2