Regressions on trunk at revision 247727 vs revision 247726

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

New failures:

New passes:
FAIL: gcc.dg/tree-ssa/ssa-dom-thread-4.c scan-tree-dump-times dom2 "Threaded" 2
FAIL: gcc.dg/tree-ssa/ssa-dom-thread-4.c scan-tree-dump-times dom2 "Threaded" 2
FAIL: gcc.dg/tree-ssa/ssa-dom-thread-4.c scan-tree-dump-times vrp1 "Threaded" 2
FAIL: gcc.dg/tree-ssa/ssa-dom-thread-4.c scan-tree-dump-times vrp1 "Threaded" 2