Function test_backend

tests/test-backend-ops.cpp:9074–9186

}

static bool test_backend(ggml_backend_t backend, test_mode mode, const char * op_names_filter, const char * params_filter,
                         printer * output_printer, const char * test_file_path) {
    auto filter_test_cases = [](std::vector<std::unique_ptr<test_case>> & test_cases, const char * params_filter) {
        if (params_filter == nullptr) {
            return;
        }

        std::regex params_filter_regex(params_filter);

        for (auto it = test_cases.begin(); it != test_cases.end();) {
            if (!std::regex_search((*it)->vars(), params_filter_regex)) {
                it = test_cases.erase(it);
                continue;
            }

            it++;
        }
    };

    std::vector<std::unique_ptr<test_case>> test_cases;

    if (test_file_path == nullptr) {
        switch (mode) {
        case MODE_TEST:
        case MODE_GRAD:
        case MODE_SUPPORT:
            test_cases = make_test_cases_eval();
            break;
        case MODE_PERF:
            test_cases = make_test_cases_perf();
            break;
        }
    } else {
        test_cases = make_test_cases_from_file(test_file_path);
    }

    filter_test_cases(test_cases, params_filter);

    if (mode == MODE_TEST) {
        ggml_backend_t backend_cpu = ggml_backend_init_by_type(GGML_BACKEND_DEVICE_TYPE_CPU, NULL);
        if (backend_cpu == NULL) {
            test_operation_info info("", "", "CPU");
            info.set_error("backend", "Failed to initialize CPU backend");
            output_printer->print_operation(info);
            return false;
        }
        // Use reference implementation on the CPU backend for comparison
        using ggml_backend_cpu_set_use_ref_t = void (*)(ggml_backend_t, bool);
        auto * reg = ggml_backend_dev_backend_reg(ggml_backend_get_device(backend_cpu));
        auto * set_use_ref = (ggml_backend_cpu_set_use_ref_t) ggml_backend_reg_get_proc_address(reg, "ggml_backend_cpu_set_use_ref");
        if (set_use_ref) {
            set_use_ref(backend_cpu, true);
        }

        size_t n_ok = 0;
        size_t                   tests_run = 0;
        std::vector<std::string> failed_tests;
        for (auto & test : test_cases) {