Regressions on trunk at revision 237837 vs revision 237826

[Intel Automatic Testing System [Intel64 Core AVXi]]

New failures:

New passes:
FAIL: gcc.dg/atomic/c11-atomic-exec-5.c   -O2  execution test
FAIL: gcc.dg/atomic/c11-atomic-exec-5.c   -O2 -flto -fno-use-linker-plugin -flto-partition=none  execution test
FAIL: gcc.dg/atomic/c11-atomic-exec-5.c   -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  execution test
FAIL: gcc.dg/atomic/c11-atomic-exec-5.c   -O3 -g  execution test
WARNING: program timed out.
WARNING: program timed out.
WARNING: program timed out.
WARNING: program timed out.