Regressions on trunk at revision 191629 vs revision 191610

[H.J. Lu Intel64]

New failures:
FAIL: gcc.dg/pch/decl-1.c   -O3 -fomit-frame-pointer  -I. -Dwith_PCH (internal compiler error)
FAIL: gcc.dg/pch/decl-1.c   -O3 -fomit-frame-pointer  -I. -Dwith_PCH (test for excess errors)
FAIL: gcc.dg/pch/decl-1.c  -O3 -fomit-frame-pointer  assembly comparison

New passes: