}
	var rtype *ssa.Value
	if rtypeExpr != nil {
		rtype = s.expr(rtypeExpr)
	} else {
		rtype = s.reflectType(elem)
	}
	s.rtcall(ir.Syms.CheckPtrAlignment, true, nil, v, rtype, count)
}

// reflectType returns an SSA value representing a pointer to typ's
// reflection type descriptor.
func (s *state) reflectType(typ *types.Type) *ssa.Value {
	// TODO(mdempsky): Make this Fatalf under Unified IR; frontend needs