Regressions on trunk at revision 188510 vs revision 188484

[H.J. Lu ia32]

New failures:

New passes:
FAIL: gcc.c-torture/compile/20011229-1.c  -Os  (internal compiler error)
FAIL: gcc.c-torture/compile/20011229-1.c  -Os  (test for excess errors)
FAIL: gcc.c-torture/compile/pr25311.c  -Os  (internal compiler error)
FAIL: gcc.c-torture/compile/pr25311.c  -Os  (test for excess errors)