Regressions on trunk at revision 244564 vs revision 244520

[H.J. Lu]

New failures:

New passes:
FAIL: g++.dg/tree-ssa/ssa-dse-2.C  -std=gnu++11  scan-tree-dump dse2 "Deleted dead call: "
FAIL: g++.dg/tree-ssa/ssa-dse-2.C  -std=gnu++11 (test for excess errors)
FAIL: g++.dg/tree-ssa/ssa-dse-2.C  -std=gnu++14  scan-tree-dump dse2 "Deleted dead call: "
FAIL: g++.dg/tree-ssa/ssa-dse-2.C  -std=gnu++14 (test for excess errors)
FAIL: g++.dg/tree-ssa/ssa-dse-2.C  -std=gnu++98  scan-tree-dump dse2 "Deleted dead call: "
FAIL: g++.dg/tree-ssa/ssa-dse-2.C  -std=gnu++98 (test for excess errors)