Regressions on trunk at revision 275449 vs revision 275397

[H.J. Lu (Intel64 AVX512)]

New failures:
FAIL: 23_containers/span/get_neg.cc (test for excess errors)
FAIL: 23_containers/span/get_neg.cc (test for excess errors)

New passes:
FAIL: gcc.dg/plugin/location-overflow-test-pr83173.c -fplugin=./location_overflow_plugin.so  scan-file-not # (?!1 [^\r\n]+location-overflow-test-pr83173-1.h" 1)[0-9]+ [^\r\n]+location-overflow-test-pr83173-1.h"
FAIL: gcc.dg/plugin/location-overflow-test-pr83173.c -fplugin=./location_overflow_plugin.so  scan-file-not # (?!1 [^\r\n]+location-overflow-test-pr83173-1.h" 1)[0-9]+ [^\r\n]+location-overflow-test-pr83173-1.h"
FAIL: gcc.dg/plugin/location-overflow-test-pr83173.c -fplugin=./location_overflow_plugin.so  scan-file-not # (?!1 [^\r\n]+location-overflow-test-pr83173-1.h" 1)[0-9]+ [^\r\n]+location-overflow-test-pr83173-1.h"
FAIL: gfortran.dg/assign_9.f90   -O3 -fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions  execution test
FAIL: gfortran.dg/assign_9.f90   -O3 -g  execution test
FAIL: gfortran.dg/direct_io_10.f   -O3 -fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions  execution test
FAIL: gfortran.dg/direct_io_10.f   -O3 -g  execution test
FAIL: gfortran.dg/elemental_dependency_1.f90   -O3 -fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions  execution test
FAIL: gfortran.dg/elemental_dependency_1.f90   -O3 -fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions  execution test
FAIL: gfortran.dg/elemental_dependency_1.f90   -O3 -fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions  execution test
FAIL: gfortran.dg/elemental_dependency_1.f90   -O3 -g  execution test
FAIL: gfortran.dg/elemental_dependency_1.f90   -O3 -g  execution test
FAIL: gfortran.dg/elemental_dependency_1.f90   -O3 -g  execution test