Parse reference and dereference operators

backend/riscv.cpp

@@ -398,6 +398,17 @@ namespace elna::riscv
         }
     }
 
+    void visitor::visit(source::unary_expression *expression)
+    {
+        const auto free_register = this->register_in_use ? x_register::a0 : x_register::t0;
+        auto operand_identifier = dynamic_cast<source::variable_expression&>(expression->operand()).name();
+        auto variable_symbol =
+            std::dynamic_pointer_cast<source::variable_info>(this->table->lookup(operand_identifier));
+
+        this->instructions.push_back(instruction(base_opcode::opImm)
+            .i(free_register, funct3_t::addi, x_register::s0, variable_symbol->offset));
+    }
+
     void visitor::visit(source::integer_literal *number)
     {
         const auto free_register = this->register_in_use ? x_register::a0 : x_register::t0;