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A SparseMultiSet adds multiset behavior to SparseSet, while retaining SparseSet's desirable properties. Essentially, SparseMultiSet provides multiset behavior by storing its dense data in doubly linked lists that are inlined into the dense vector. This allows it to provide good data locality as well as vector-like constant-time clear() and fast constant time find(), insert(), and erase(). It also allows SparseMultiSet to have a builtin recycler rather than keeping SparseSet's behavior of always swapping upon removal, which allows it to preserve more iterators. It's often a better alternative to a SparseSet of a growable container or vector-of-vector. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173064 91177308-0d34-0410-b5e6-96231b3b80d8
236 lines
5.5 KiB
C++
236 lines
5.5 KiB
C++
//===------ ADT/SparseSetTest.cpp - SparseSet unit tests - -----*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/ADT/SparseMultiSet.h"
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#include "gtest/gtest.h"
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using namespace llvm;
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namespace {
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typedef SparseMultiSet<unsigned> USet;
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// Empty set tests.
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TEST(SparseMultiSetTest, EmptySet) {
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USet Set;
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EXPECT_TRUE(Set.empty());
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EXPECT_EQ(0u, Set.size());
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Set.setUniverse(10);
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// Lookups on empty set.
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EXPECT_TRUE(Set.find(0) == Set.end());
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EXPECT_TRUE(Set.find(9) == Set.end());
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// Same thing on a const reference.
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const USet &CSet = Set;
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EXPECT_TRUE(CSet.empty());
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EXPECT_EQ(0u, CSet.size());
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EXPECT_TRUE(CSet.find(0) == CSet.end());
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USet::const_iterator I = CSet.find(5);
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EXPECT_TRUE(I == CSet.end());
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}
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// Single entry set tests.
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TEST(SparseMultiSetTest, SingleEntrySet) {
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USet Set;
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Set.setUniverse(10);
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USet::iterator I = Set.insert(5);
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EXPECT_TRUE(I != Set.end());
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EXPECT_TRUE(*I == 5);
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EXPECT_FALSE(Set.empty());
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EXPECT_EQ(1u, Set.size());
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EXPECT_TRUE(Set.find(0) == Set.end());
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EXPECT_TRUE(Set.find(9) == Set.end());
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EXPECT_FALSE(Set.contains(0));
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EXPECT_TRUE(Set.contains(5));
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// Extra insert.
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I = Set.insert(5);
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EXPECT_TRUE(I != Set.end());
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EXPECT_TRUE(I == ++Set.find(5));
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I--;
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EXPECT_TRUE(I == Set.find(5));
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// Erase non-existent element.
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I = Set.find(1);
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EXPECT_TRUE(I == Set.end());
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EXPECT_EQ(2u, Set.size());
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EXPECT_EQ(5u, *Set.find(5));
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// Erase iterator.
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I = Set.find(5);
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EXPECT_TRUE(I != Set.end());
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I = Set.erase(I);
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EXPECT_TRUE(I != Set.end());
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I = Set.erase(I);
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EXPECT_TRUE(I == Set.end());
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EXPECT_TRUE(Set.empty());
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}
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// Multiple entry set tests.
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TEST(SparseMultiSetTest, MultipleEntrySet) {
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USet Set;
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Set.setUniverse(10);
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Set.insert(5);
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Set.insert(5);
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Set.insert(5);
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Set.insert(3);
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Set.insert(2);
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Set.insert(1);
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Set.insert(4);
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EXPECT_EQ(7u, Set.size());
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// Erase last element by key.
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EXPECT_TRUE(Set.erase(Set.find(4)) == Set.end());
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EXPECT_EQ(6u, Set.size());
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EXPECT_FALSE(Set.contains(4));
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EXPECT_TRUE(Set.find(4) == Set.end());
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// Erase first element by key.
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EXPECT_EQ(3u, Set.count(5));
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EXPECT_TRUE(Set.find(5) != Set.end());
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EXPECT_TRUE(Set.erase(Set.find(5)) != Set.end());
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EXPECT_EQ(5u, Set.size());
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EXPECT_EQ(2u, Set.count(5));
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Set.insert(6);
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Set.insert(7);
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EXPECT_EQ(7u, Set.size());
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// Erase tail by iterator.
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EXPECT_TRUE(Set.getTail(6) == Set.getHead(6));
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USet::iterator I = Set.erase(Set.find(6));
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EXPECT_TRUE(I == Set.end());
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EXPECT_EQ(6u, Set.size());
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// Erase tails by iterator.
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EXPECT_EQ(2u, Set.count(5));
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I = Set.getTail(5);
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I = Set.erase(I);
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EXPECT_TRUE(I == Set.end());
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--I;
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EXPECT_EQ(1u, Set.count(5));
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EXPECT_EQ(5u, *I);
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I = Set.erase(I);
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EXPECT_TRUE(I == Set.end());
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EXPECT_EQ(0u, Set.count(5));
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Set.insert(8);
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Set.insert(8);
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Set.insert(8);
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Set.insert(8);
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Set.insert(8);
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// Erase all the 8s
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EXPECT_EQ(5u, std::distance(Set.getHead(8), Set.end()));
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Set.eraseAll(8);
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EXPECT_EQ(0u, std::distance(Set.getHead(8), Set.end()));
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// Clear and resize the universe.
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Set.clear();
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EXPECT_EQ(0u, Set.size());
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EXPECT_FALSE(Set.contains(3));
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Set.setUniverse(1000);
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// Add more than 256 elements.
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for (unsigned i = 100; i != 800; ++i)
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Set.insert(i);
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for (unsigned i = 0; i != 10; ++i)
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Set.eraseAll(i);
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for (unsigned i = 100; i != 800; ++i)
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EXPECT_EQ(1u, Set.count(i));
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EXPECT_FALSE(Set.contains(99));
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EXPECT_FALSE(Set.contains(800));
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EXPECT_EQ(700u, Set.size());
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}
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// Test out iterators
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TEST(SparseMultiSetTest, Iterators) {
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USet Set;
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Set.setUniverse(100);
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Set.insert(0);
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Set.insert(1);
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Set.insert(2);
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Set.insert(0);
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Set.insert(1);
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Set.insert(0);
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USet::RangePair RangePair = Set.equal_range(0);
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USet::iterator B = RangePair.first;
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USet::iterator E = RangePair.second;
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// Move the iterators around, going to end and coming back.
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EXPECT_EQ(3u, std::distance(B, E));
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EXPECT_EQ(B, --(--(--E)));
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EXPECT_EQ(++(++(++E)), Set.end());
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EXPECT_EQ(B, --(--(--E)));
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EXPECT_EQ(++(++(++E)), Set.end());
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// Insert into the tail, and move around again
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Set.insert(0);
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EXPECT_EQ(B, --(--(--(--E))));
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EXPECT_EQ(++(++(++(++E))), Set.end());
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EXPECT_EQ(B, --(--(--(--E))));
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EXPECT_EQ(++(++(++(++E))), Set.end());
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// Erase a tail, and move around again
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USet::iterator Erased = Set.erase(Set.getTail(0));
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EXPECT_EQ(Erased, E);
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EXPECT_EQ(B, --(--(--E)));
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USet Set2;
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Set2.setUniverse(11);
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Set2.insert(3);
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EXPECT_TRUE(!Set2.contains(0));
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EXPECT_TRUE(!Set.contains(3));
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EXPECT_EQ(Set2.getHead(3), Set2.getTail(3));
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EXPECT_EQ(Set2.getHead(0), Set2.getTail(0));
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B = Set2.find(3);
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EXPECT_EQ(Set2.find(3), --(++B));
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}
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struct Alt {
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unsigned Value;
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explicit Alt(unsigned x) : Value(x) {}
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unsigned getSparseSetIndex() const { return Value - 1000; }
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};
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TEST(SparseMultiSetTest, AltStructSet) {
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typedef SparseMultiSet<Alt> ASet;
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ASet Set;
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Set.setUniverse(10);
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Set.insert(Alt(1005));
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ASet::iterator I = Set.find(5);
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ASSERT_TRUE(I != Set.end());
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EXPECT_EQ(1005u, I->Value);
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Set.insert(Alt(1006));
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Set.insert(Alt(1006));
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I = Set.erase(Set.find(6));
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ASSERT_TRUE(I != Set.end());
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EXPECT_EQ(1006u, I->Value);
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I = Set.erase(Set.find(6));
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ASSERT_TRUE(I == Set.end());
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EXPECT_TRUE(Set.contains(5));
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EXPECT_FALSE(Set.contains(6));
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}
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} // namespace
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