Regressions on trunk at revision 177691 vs revision 177688

[H.J. Lu ia32]

New failures:
FAIL: g++.dg/tree-ssa/pr41186.C scan-tree-dump fre1 "Replaced b1.D.[0-9]*.f with 1"
FAIL: g++.dg/tree-ssa/pr41186.C scan-tree-dump fre1 "Replaced b1.D.[0-9]*.i with 0"

New passes: