// Fix up child to have one more predecessor.
				child.Preds = append(child.Preds, Edge{p, pk.i})
				ai := b.Succs[out].i
				for _, v := range child.Values {
					if v.Op != OpPhi {
						continue
					}
					v.AddArg(v.Args[ai])
				}
				if b.Func.pass.debug > 0 {
					b.Func.Warnl(b.Controls[0].Pos, "Redirect %s based on %s", b.Controls[0].Op, p.Controls[0].Op)
				}
				changed = true
				k--
				break
			}