Regressions on master at commit r14-9938 vs commit r14-9913 on Linux/x86_64

[H.J. Lu via Gcc-regression]

Regressions on master at commit r14-9938 vs commit r14-9913 on Linux/x86_64
New failures:
FAIL: gcc.dg/torture/convert-dfp-2.c   -O2 -flto -fuse-linker-plugin 
-fno-fat-lto-objects  (test for excess errors)
FAIL: libstdc++-abi/abi_check

New passes: