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to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
105 lines
2.7 KiB
C++
105 lines
2.7 KiB
C++
//===- llvm/unittest/ADT/DAGDeltaAlgorithmTest.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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#include "llvm/ADT/DAGDeltaAlgorithm.h"
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#include "gtest/gtest.h"
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#include <algorithm>
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#include <cstdarg>
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using namespace llvm;
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namespace {
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typedef DAGDeltaAlgorithm::edge_ty edge_ty;
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class FixedDAGDeltaAlgorithm : public DAGDeltaAlgorithm {
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changeset_ty FailingSet;
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unsigned NumTests;
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protected:
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bool ExecuteOneTest(const changeset_ty &Changes) override {
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++NumTests;
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return std::includes(Changes.begin(), Changes.end(),
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FailingSet.begin(), FailingSet.end());
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}
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public:
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FixedDAGDeltaAlgorithm(const changeset_ty &_FailingSet)
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: FailingSet(_FailingSet),
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NumTests(0) {}
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unsigned getNumTests() const { return NumTests; }
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};
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std::set<unsigned> fixed_set(unsigned N, ...) {
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std::set<unsigned> S;
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va_list ap;
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va_start(ap, N);
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for (unsigned i = 0; i != N; ++i)
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S.insert(va_arg(ap, unsigned));
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va_end(ap);
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return S;
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}
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std::set<unsigned> range(unsigned Start, unsigned End) {
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std::set<unsigned> S;
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while (Start != End)
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S.insert(Start++);
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return S;
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}
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std::set<unsigned> range(unsigned N) {
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return range(0, N);
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}
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TEST(DAGDeltaAlgorithmTest, Basic) {
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std::vector<edge_ty> Deps;
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// Dependencies:
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// 1 - 3
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Deps.clear();
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Deps.push_back(std::make_pair(3, 1));
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// P = {3,5,7} \in S,
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// [0, 20),
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// should minimize to {1,3,5,7} in a reasonable number of tests.
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FixedDAGDeltaAlgorithm FDA(fixed_set(3, 3, 5, 7));
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EXPECT_EQ(fixed_set(4, 1, 3, 5, 7), FDA.Run(range(20), Deps));
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EXPECT_GE(46U, FDA.getNumTests());
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// Dependencies:
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// 0 - 1
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// \- 2 - 3
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// \- 4
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Deps.clear();
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Deps.push_back(std::make_pair(1, 0));
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Deps.push_back(std::make_pair(2, 0));
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Deps.push_back(std::make_pair(4, 0));
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Deps.push_back(std::make_pair(3, 2));
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// This is a case where we must hold required changes.
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//
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// P = {1,3} \in S,
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// [0, 5),
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// should minimize to {0,1,2,3} in a small number of tests.
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FixedDAGDeltaAlgorithm FDA2(fixed_set(2, 1, 3));
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EXPECT_EQ(fixed_set(4, 0, 1, 2, 3), FDA2.Run(range(5), Deps));
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EXPECT_GE(9U, FDA2.getNumTests());
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// This is a case where we should quickly prune part of the tree.
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//
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// P = {4} \in S,
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// [0, 5),
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// should minimize to {0,4} in a small number of tests.
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FixedDAGDeltaAlgorithm FDA3(fixed_set(1, 4));
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EXPECT_EQ(fixed_set(2, 0, 4), FDA3.Run(range(5), Deps));
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EXPECT_GE(6U, FDA3.getNumTests());
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}
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}
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