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// -*- C++ -*-
//===-- find_if.pass.cpp --------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14
// Tests for find_if and find_if_not
#include "support/pstl_test_config.h"
#include <execution>
#include <algorithm>
#include "support/utils.h"
using namespace TestUtils;
struct test_find_if
{
#if _PSTL_ICC_17_VC141_TEST_SIMD_LAMBDA_DEBUG_32_BROKEN || \
_PSTL_ICC_16_VC14_TEST_SIMD_LAMBDA_DEBUG_32_BROKEN //dummy specialization by policy type, in case of broken configuration
template <typename Iterator, typename Predicate, typename NotPredicate>
void
operator()(pstl::execution::unsequenced_policy, Iterator first, Iterator last, Predicate pred,
NotPredicate not_pred)
{
}
template <typename Iterator, typename Predicate, typename NotPredicate>
void
operator()(pstl::execution::parallel_unsequenced_policy, Iterator first, Iterator last, Predicate pred,
NotPredicate not_pred)
{
}
#endif
template <typename Policy, typename Iterator, typename Predicate, typename NotPredicate>
void
operator()(Policy&& exec, Iterator first, Iterator last, Predicate pred, NotPredicate not_pred)
{
auto i = std::find_if(first, last, pred);
auto j = find_if(exec, first, last, pred);
EXPECT_TRUE(i == j, "wrong return value from find_if");
auto i_not = find_if_not(exec, first, last, not_pred);
EXPECT_TRUE(i_not == i, "wrong return value from find_if_not");
}
};
template <typename T, typename Predicate, typename Hit, typename Miss>
void
test(Predicate pred, Hit hit, Miss miss)
{
auto not_pred = [pred](T x) { return !pred(x); };
// Try sequences of various lengths.
for (size_t n = 0; n <= 100000; n = n <= 16 ? n + 1 : size_t(3.1415 * n))
{
Sequence<T> in(n, [&](size_t k) -> T { return miss(n ^ k); });
// Try different find positions, including not found.
// By going backwards, we can add extra matches that are *not* supposed to be found.
// The decreasing exponential gives us O(n) total work for the loop since each find takes O(m) time.
for (size_t m = n; m > 0; m *= 0.6)
{
if (m < n)
in[m] = hit(n ^ m);
invoke_on_all_policies(test_find_if(), in.begin(), in.end(), pred, not_pred);
invoke_on_all_policies(test_find_if(), in.cbegin(), in.cend(), pred, not_pred);
}
}
}
struct test_non_const
{
template <typename Policy, typename Iterator>
void
operator()(Policy&& exec, Iterator iter)
{
auto is_even = [&](float64_t v) {
uint32_t i = (uint32_t)v;
return i % 2 == 0;
};
invoke_if(exec, [&]() {
find_if(exec, iter, iter, non_const(is_even));
find_if_not(exec, iter, iter, non_const(is_even));
});
}
};
int
main()
{
#if !_PSTL_ICC_17_TEST_MAC_RELEASE_32_BROKEN
// Note that the "hit" and "miss" functions here avoid overflow issues.
test<Number>(IsMultiple(5, OddTag()), [](int32_t j) { return Number(j - j % 5, OddTag()); }, // hit
[](int32_t j) { return Number(j % 5 == 0 ? j ^ 1 : j, OddTag()); }); // miss
#endif
// Try type for which algorithm can really be vectorized.
test<float32_t>([](float32_t x) { return x >= 0; }, [](float32_t j) { return j * j; },
[](float32_t j) { return -1 - j * j; });
test_algo_basic_single<int32_t>(run_for_rnd_fw<test_non_const>());
std::cout << done() << std::endl;
return 0;
}
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