Regressions on trunk at revision 191614 vs revision 191613

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

New failures:
FAIL: gcc.dg/pch/cpp-3.c   -O0  -I. -Dwith_PCH (internal compiler error)
FAIL: gcc.dg/pch/cpp-3.c   -O0  -I. -Dwith_PCH (test for excess errors)
FAIL: gcc.dg/pch/cpp-3.c  -O0  assembly comparison

New passes: