Regressions on trunk at revision 179993 vs revision 179977

[H.J. Lu Intel64]

New failures:
FAIL: 17_intro/headers/c++200x/stdc++.cc (test for excess errors)
FAIL: gfortran.dg/pr42294.f  -O  (internal compiler error)
FAIL: gfortran.dg/pr42294.f  -O  (internal compiler error)
FAIL: gfortran.dg/pr42294.f  -O  (test for excess errors)
FAIL: gfortran.dg/pr42294.f  -O  (test for excess errors)
FAIL: gfortran.dg/pr44691.f  -O  (internal compiler error)
FAIL: gfortran.dg/pr44691.f  -O  (internal compiler error)
FAIL: gfortran.dg/pr44691.f  -O  (test for excess errors)
FAIL: gfortran.dg/pr44691.f  -O  (test for excess errors)
FAIL: gfortran.fortran-torture/execute/entry_10.f90,  -O2  (internal compiler error)
FAIL: gfortran.fortran-torture/execute/entry_10.f90,  -O2 -fomit-frame-pointer -finline-functions  (internal compiler error)

New passes:
FAIL: gcc.target/i386/warn-vect-op-1.c  (test for warnings, line 15)
FAIL: gcc.target/i386/warn-vect-op-1.c (test for excess errors)
FAIL: gcc.target/i386/warn-vect-op-3.c  (test for warnings, line 12)
FAIL: gcc.target/i386/warn-vect-op-3.c  (test for warnings, line 13)
FAIL: gcc.target/i386/warn-vect-op-3.c (test for excess errors)