Regressions on 4.5 at revision 183364 vs revision 183200

[H.J. Lu ia32]

New failures:
FAIL: g++.dg/debug/namespace1.C -gdwarf-2 -g1 -O2 (test for excess errors)
FAIL: g++.dg/debug/using2.C -gcoff1 (test for excess errors)
FAIL: g++.dg/torture/pr40460.C  -O3 -fomit-frame-pointer -funroll-all-loops -finline-functions  (test for excess errors)
FAIL: g++.dg/torture/pr51344.C  -O0  (test for excess errors)
FAIL: g++.dg/torture/pr51344.C  -O1  (test for excess errors)
FAIL: g++.dg/torture/pr51344.C  -O2  (test for excess errors)
FAIL: g++.dg/torture/pr51344.C  -O2 -flto  (test for excess errors)
FAIL: g++.dg/torture/pr51344.C  -O2 -fwhopr  (test for excess errors)
FAIL: g++.dg/torture/pr51344.C  -O3 -fomit-frame-pointer  (test for excess errors)
FAIL: g++.dg/torture/pr51344.C  -O3 -g  (test for excess errors)
FAIL: g++.dg/torture/pr51344.C  -Os  (test for excess errors)
FAIL: g++.old-deja/g++.brendan/dtors3.C (test for excess errors)
FAIL: g++.old-deja/g++.bugs/900428_01.C  (test for warnings, line 99)

New passes: