Regressions on trunk at revision 238029 vs revision 238002

[Intel Automatic Testing System [Intel64 Core AVX2]]

New failures:
FAIL: gcc.dg/atomic/c11-atomic-exec-4.c   -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  execution test
FAIL: gcc.dg/atomic/c11-atomic-exec-5.c   -O2  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"

New passes:
FAIL: gcc.dg/atomic/c11-atomic-exec-5.c   -O1  execution test
FAIL: gcc.dg/atomic/c11-atomic-exec-5.c   -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  execution test