Regressions on trunk at revision 178747 vs revision 178726

[H.J. Lu Intel64 Core 2/i7]

New failures:
FAIL: gfortran.dg/graphite/id-22.f  -O  (internal compiler error)
FAIL: gfortran.dg/graphite/id-22.f  -O  (internal compiler error)
FAIL: gfortran.dg/graphite/id-22.f  -O  (test for excess errors)
FAIL: gfortran.dg/graphite/id-22.f  -O  (test for excess errors)

New passes:
WARNING: program timed out.