Regressions on trunk at revision 237865 vs revision 237844

[Intel Automatic Testing System [Intel64 Core AVX2 PIC]]

New failures:
FAIL: gcc.dg/atomic/c11-atomic-exec-5.c   -O2  execution test

New passes:
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   -O3 -fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions  execution test
WARNING: program timed out.