Regressions on trunk at revision 240458 vs revision 240431

[H.J. Lu ia32 -fpic]

New failures:

New passes:
FAIL: c-c++-common/ubsan/object-size-9.c   -O2  execution test
FAIL: c-c++-common/ubsan/object-size-9.c   -O2 -flto -fno-use-linker-plugin -flto-partition=none  execution test
FAIL: g++.dg/cilk-plus/CK/fib-opr-overload.cc  -g -fcilkplus execution test