Regressions on trunk at revision 224769 vs revision 224722

[H.J. Lu x32]

New failures:
FAIL: c-c++-common/ubsan/pr58443-3.c   -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects   scan-assembler __ubsan_handle_divrem_overflow
FAIL: c-c++-common/ubsan/pr58443-3.c   -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects   scan-assembler __ubsan_handle_divrem_overflow
FAIL: c-c++-common/ubsan/pr58443-3.c   -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects   scan-assembler __ubsan_handle_shift_out_of_bounds
FAIL: c-c++-common/ubsan/pr58443-3.c   -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects   scan-assembler __ubsan_handle_shift_out_of_bounds
FAIL: gcc.c-torture/compile/pr61848.c   -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects   scan-assembler mysection
FAIL: gcc.dg/torture/builtin-self.c   -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects   scan-assembler \t(lock|mfence)
FAIL: g++.dg/torture/pr61848.C   -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects   scan-assembler mysection

New passes: