forked from OSchip/llvm-project
53 lines
1.5 KiB
C++
53 lines
1.5 KiB
C++
//===- llvm/unittest/Support/ParallelTest.cpp -----------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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///
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/// \file
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/// Parallel.h unit tests.
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///
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//===----------------------------------------------------------------------===//
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#include "llvm/Support/Parallel.h"
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#include "gtest/gtest.h"
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#include <array>
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#include <random>
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uint32_t array[1024 * 1024];
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using namespace llvm;
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// Tests below are hanging up on mingw. Investigating.
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#if !defined(__MINGW32__)
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TEST(Parallel, sort) {
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std::mt19937 randEngine;
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std::uniform_int_distribution<uint32_t> dist;
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for (auto &i : array)
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i = dist(randEngine);
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sort(parallel::par, std::begin(array), std::end(array));
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ASSERT_TRUE(std::is_sorted(std::begin(array), std::end(array)));
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}
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TEST(Parallel, parallel_for) {
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// We need to test the case with a TaskSize > 1. We are white-box testing
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// here. The TaskSize is calculated as (End - Begin) / 1024 at the time of
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// writing.
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uint32_t range[2050];
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std::fill(range, range + 2050, 1);
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for_each_n(parallel::par, 0, 2049, [&range](size_t I) { ++range[I]; });
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uint32_t expected[2049];
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std::fill(expected, expected + 2049, 2);
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ASSERT_TRUE(std::equal(range, range + 2049, expected));
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// Check that we don't write past the end of the requested range.
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ASSERT_EQ(range[2049], 1u);
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}
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#endif
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