// Sort followers after leaders, if mls != nil
	if mls != nil {
		aFollow := mls.Subsumed(a)
		bFollow := mls.Subsumed(b)
		if aFollow != bFollow {
			return bFollow
		}
	}

	// Sort used before unused (so AllocFrame can truncate unused
	// variables).
	if a.Used() != b.Used() {
		return a.Used()
	}

	// Sort pointer-typed before non-pointer types.
	// Keeps the stack's GC bitmap compact.
	ap := a.Type().HasPointers()

func (lv *liveness) valueEffects(v *ssa.Value) (int32, liveEffect) {
	n, e := affectedVar(v)
	if e == 0 || n == nil { // cheapest checks first
		return -1, 0
	}
	// AllocFrame has dropped unused variables from
	// lv.fn.Func.Dcl, but they might still be referenced by
	// OpVarFoo pseudo-ops. Ignore them to prevent "lost track of
	// variable" ICEs (issue 19632).
	switch v.Op {

		}
	}

	s.f.HTMLWriter.WritePhase("before insert phis", "before insert phis")

	s.insertPhis()

	// Main call to ssa package to compile function
	ssa.Compile(s.f)

	fe.AllocFrame(s.f)

	if len(s.openDefers) != 0 {
		s.emitOpenDeferInfo()
	}

	// Record incoming parameter spill information for morestack calls emitted in the assembler.