base_ir->insert_before(var);
ir_dereference *deref = new(mem_ctx) ir_dereference_variable(var);
ir_expression *expr = new(mem_ctx) ir_expression(ir_unop_rcp,
base_ir->insert_before(var);
ir_dereference *deref = new(mem_ctx) ir_dereference_variable(var);
ir_expression *expr = new(mem_ctx) ir_expression(ir_unop_rcp,