Regressions on trunk at revision 160644 vs revision 160601

[H.J. Lu]

New failures:

New passes:
FAIL: gcc.dg/guality/vla-1.c  -O1  line 17 i == 5
FAIL: libgomp.fortran/lock-1.f90  -O3 -g  (internal compiler error)
FAIL: libgomp.fortran/lock-1.f90  -O3 -g  (test for excess errors)
FAIL: libgomp.fortran/task1.f90  -O2  (internal compiler error)
FAIL: libgomp.fortran/task1.f90  -O2  (test for excess errors)
FAIL: libgomp.fortran/task1.f90  -O3 -fomit-frame-pointer  (internal compiler error)
FAIL: libgomp.fortran/task1.f90  -O3 -fomit-frame-pointer  (test for excess errors)
FAIL: libgomp.fortran/task1.f90  -O3 -fomit-frame-pointer -funroll-all-loops -finline-functions  (internal compiler error)
FAIL: libgomp.fortran/task1.f90  -O3 -fomit-frame-pointer -funroll-all-loops -finline-functions  (test for excess errors)
FAIL: libgomp.fortran/task1.f90  -O3 -fomit-frame-pointer -funroll-loops  (internal compiler error)
FAIL: libgomp.fortran/task1.f90  -O3 -fomit-frame-pointer -funroll-loops  (test for excess errors)
FAIL: libgomp.fortran/task1.f90  -O3 -g  (internal compiler error)
FAIL: libgomp.fortran/task1.f90  -O3 -g  (test for excess errors)
FAIL: libgomp.fortran/task1.f90  -Os  (internal compiler error)
FAIL: libgomp.fortran/task1.f90  -Os  (test for excess errors)