96 lines
3.1 KiB
C++
96 lines
3.1 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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parallelSort(std::begin(array), std::end(array));
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ASSERT_TRUE(llvm::is_sorted(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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parallelForEachN(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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TEST(Parallel, TransformReduce) {
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// Sum an empty list, check that it works.
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auto identity = [](uint32_t v) { return v; };
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uint32_t sum = parallelTransformReduce(ArrayRef<uint32_t>(), 0U,
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std::plus<uint32_t>(), identity);
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EXPECT_EQ(sum, 0U);
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// Sum the lengths of these strings in parallel.
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const char *strs[] = {"a", "ab", "abc", "abcd", "abcde", "abcdef"};
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size_t lenSum =
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parallelTransformReduce(strs, static_cast<size_t>(0), std::plus<size_t>(),
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[](const char *s) { return strlen(s); });
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EXPECT_EQ(lenSum, static_cast<size_t>(21));
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// Check that we handle non-divisible task sizes as above.
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uint32_t range[2050];
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std::fill(std::begin(range), std::end(range), 1);
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sum = parallelTransformReduce(range, 0U, std::plus<uint32_t>(), identity);
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EXPECT_EQ(sum, 2050U);
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std::fill(std::begin(range), std::end(range), 2);
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sum = parallelTransformReduce(range, 0U, std::plus<uint32_t>(), identity);
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EXPECT_EQ(sum, 4100U);
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// Avoid one large task.
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uint32_t range2[3060];
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std::fill(std::begin(range2), std::end(range2), 1);
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sum = parallelTransformReduce(range2, 0U, std::plus<uint32_t>(), identity);
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EXPECT_EQ(sum, 3060U);
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}
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TEST(Parallel, ForEachError) {
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int nums[] = {1, 2, 3, 4, 5, 6};
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Error e = parallelForEachError(nums, [](int v) -> Error {
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if ((v & 1) == 0)
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return createStringError(std::errc::invalid_argument, "asdf");
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return Error::success();
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});
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EXPECT_TRUE(e.isA<ErrorList>());
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std::string errText = toString(std::move(e));
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EXPECT_EQ(errText, std::string("asdf\nasdf\nasdf"));
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}
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#endif
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