Regressions on trunk at revision 254067 vs revision 254037

[H.J. Lu]

New failures:

New passes:
FAIL: gcc.target/i386/mpx/nested-function-1-lbv.c   -O1  (test for excess errors)
FAIL: g++.dg/asan/default-options-1.C   -O2 -flto -fno-use-linker-plugin -flto-partition=none  output pattern test
FAIL: g++.dg/asan/default-options-1.C   -O2 -flto -fno-use-linker-plugin -flto-partition=none  output pattern test
FAIL: g++.dg/tree-prof/morefunc.C execution,    -g