Regressions on trunk at revision 202823 vs revision 202822

[H.J. Lu Intel64]

New failures:
FAIL: c-c++-common/asan/global-overflow-1.c  -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  (test for excess errors)
FAIL: libvtv.cc/xlan-test.cc -O0 -fvtable-verify=std (test for excess errors)

New passes:
FAIL: 23_containers/list/requirements/exception/propagation_consistent.cc (test for excess errors)
FAIL: abi/demangle/abi_examples/23.cc (test for excess errors)
FAIL: gcc.dg/tree-ssa/pr21574.c (test for excess errors)