Regressions on trunk at revision 245505 vs revision 245496

[H.J. Lu Intel64 Core i7]

New failures:

New passes:
FAIL: gcc.dg/ia64-sync-3.c (internal compiler error)
FAIL: gcc.dg/ia64-sync-3.c (test for excess errors)
FAIL: libgomp.c/pr48591.c (internal compiler error)
FAIL: libgomp.c/pr48591.c (test for excess errors)
FAIL: libgomp.fortran/reduction2.f90   -O0  (internal compiler error)
FAIL: libgomp.fortran/reduction2.f90   -O0  (test for excess errors)