Regressions on trunk at revision 177760 vs revision 177757

[H.J. Lu ia32]

New failures:

New passes:
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"