// analysis.
func IsMergeCandidate(n *ir.Name) bool {
	if base.Debug.MergeLocals == 0 ||
		base.Flag.N != 0 ||
		n.Class != ir.PAUTO ||
		n.Type().Size() <= int64(3*types.PtrSize) ||
		n.Addrtaken() ||
		n.NonMergeable() ||
		n.OpenDeferSlot() {
		return false
	}
	return true

	}
	if len(as2body.Lhs) != 1 || as2body.Lhs[0] != dcl.X {
		return false
	}

	// Can't remove the parameter variables if an address is taken.
	for _, v := range as2init.Lhs {
		if v.(*ir.Name).Addrtaken() {
			return false
		}
	}
	// Can't move the computation of the args if they have side effects.
	for _, r := range as2init.Rhs {
		if AnySideEffects(r) {
			return false
		}
	}

			// the user took its address, we may have generated
			// runtime calls that did (#43701). Since we don't
			// convert Addrtaken variables to SSA anyway, no point
			// in promoting them either.
			if n.Byval() && !n.Addrtaken() && ssa.CanSSA(n.Type()) {
				n.Class = ir.PAUTO
				fn.Dcl = append(fn.Dcl, n)
				s.assign(n, s.load(n.Type(), ptr), false, 0)
				continue
			}