Regressions on trunk at revision 167438 vs revision 167375

[H.J. Lu Intel64]

New failures:

New passes:
FAIL: 20_util/unique_ptr/requirements/explicit_instantiation/explicit_instantiation.cc (test for excess errors)
FAIL: gcc.dg/graphite/pr45297.c (internal compiler error)
FAIL: gcc.dg/graphite/pr45297.c (test for excess errors)
FAIL: gcc.dg/pr14963.c (internal compiler error)
FAIL: gcc.dg/pr14963.c (test for excess errors)
FAIL: gcc.target/i386/pr37434-2.c scan-assembler pinsrw
FAIL: gcc.target/i386/pr37434-4.c scan-assembler pinsrb