Regressions on trunk at revision 255845 vs revision 255835

[H.J. Lu ia32]

New failures:

New passes:
FAIL: gcc.dg/graphite/pr70045.c (internal compiler error)
FAIL: gcc.dg/graphite/pr70045.c (test for excess errors)
FAIL: gcc.dg/pr82975.c (test for excess errors)