Regressions on 4.5 at revision 162241 vs revision 162173

[H.J. Lu ia64]

New failures:
FAIL: gfortran.dg/auto_char_len_3.f90  -O3 -fomit-frame-pointer -funroll-all-loops -finline-functions  (test for excess errors)
FAIL: gfortran.dg/dfloat_1.f90  -O3 -g  (test for excess errors)
WARNING: program timed out.

New passes:
FAIL: g++.dg/ext/attrib29.C (test for excess errors)
FAIL: gcc.c-torture/compile/20030707-1.c  -Os  (test for excess errors)