get_size_variable
size_expr = get_size_variable(expr->right, &limit_type);
size_expr = get_size_variable(right, &limit_type);
comp = get_size_variable(arg, &limit_type);
size = get_size_variable(array, &limit_type);
struct expression *get_size_variable(struct expression *buf, int *limit_type);
size = get_size_variable(array, &limit_type);
size = get_size_variable(array, &limit_type);
size = get_size_variable(array, limit_type);
size = get_size_variable(expr->right, &limit_type);