Regressions on trunk at revision 238040 vs revision 238029

[Intel Automatic Testing System [Intel64 Core AVX2]]

New failures:

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/tree-ssa/scev-14.c scan-tree-dump-not ivopts "Overflowness wrto loop niter:\tOverflow"
FAIL: gcc.dg/tree-ssa/scev-14.c scan-tree-dump-not ivopts "Overflowness wrto loop niter:\tOverflow"
WARNING: program timed out.