for _, v := range entries {
			if f.pass.stats > 1 {
				f.LogStat("file", v.f, "low", v.lp.first, "high", v.lp.last)
			}
			total += uint64(v.lp.last - v.lp.first)
			if maxfile < v.f {
				maxfile = v.f
			}
			if minline > v.lp.first {
				minline = v.lp.first
			}
			if maxline < v.lp.last {
				maxline = v.lp.last
			}
		}

					// them appropriately, so don't mess with them here.
					continue
				}
				b.ReplaceControl(i, x)
			}
		}
	}

	if f.pass.stats > 0 {
		f.LogStat("CSE REWRITES", rewrites)
	}
}

// An eqclass approximates an equivalence class. During the
// algorithm it may represent the union of several of the
// final equivalence classes.
type eqclass []*Value