Regressions on 4.5 at revision 185168 vs revision 184569

[H.J. Lu ia32]

New failures:
FAIL: g++.dg/debug/debug7.C -gcoff (test for excess errors)
FAIL: g++.dg/debug/dwarf2-1.C -gdwarf-2 -g1 -O3 (test for excess errors)
FAIL: g++.dg/torture/pr37421.C  -O2 -fwhopr  (test for excess errors)
FAIL: g++.dg/torture/pr38747.C  -O3 -g  (test for excess errors)
FAIL: g++.old-deja/g++.mike/rtti3.C (test for excess errors)
FAIL: g++.old-deja/g++.other/linkage4.C (test for excess errors)
FAIL: g++.old-deja/g++.pt/friend21.C (test for excess errors)

New passes:
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)