forked from OSchip/llvm-project
85 lines
2.5 KiB
C++
85 lines
2.5 KiB
C++
//=== llvm/unittest/ADT/EquivalenceClassesTest.cpp - the structure tests --===//
|
|
//
|
|
// 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
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/ADT/EquivalenceClasses.h"
|
|
#include "gtest/gtest.h"
|
|
|
|
using namespace llvm;
|
|
|
|
namespace llvm {
|
|
|
|
TEST(EquivalenceClassesTest, NoMerges) {
|
|
EquivalenceClasses<int> EqClasses;
|
|
// Until we merged any sets, check that every element is only equivalent to
|
|
// itself.
|
|
for (int i = 0; i < 3; i++)
|
|
for (int j = 0; j < 3; j++)
|
|
if (i == j)
|
|
EXPECT_TRUE(EqClasses.isEquivalent(i, j));
|
|
else
|
|
EXPECT_FALSE(EqClasses.isEquivalent(i, j));
|
|
}
|
|
|
|
TEST(EquivalenceClassesTest, SimpleMerge1) {
|
|
EquivalenceClasses<int> EqClasses;
|
|
// Check that once we merge (A, B), (B, C), (C, D), then all elements belong
|
|
// to one set.
|
|
EqClasses.unionSets(0, 1);
|
|
EqClasses.unionSets(1, 2);
|
|
EqClasses.unionSets(2, 3);
|
|
for (int i = 0; i < 4; ++i)
|
|
for (int j = 0; j < 4; ++j)
|
|
EXPECT_TRUE(EqClasses.isEquivalent(i, j));
|
|
}
|
|
|
|
TEST(EquivalenceClassesTest, SimpleMerge2) {
|
|
EquivalenceClasses<int> EqClasses;
|
|
// Check that once we merge (A, B), (C, D), (A, C), then all elements belong
|
|
// to one set.
|
|
EqClasses.unionSets(0, 1);
|
|
EqClasses.unionSets(2, 3);
|
|
EqClasses.unionSets(0, 2);
|
|
for (int i = 0; i < 4; ++i)
|
|
for (int j = 0; j < 4; ++j)
|
|
EXPECT_TRUE(EqClasses.isEquivalent(i, j));
|
|
}
|
|
|
|
TEST(EquivalenceClassesTest, TwoSets) {
|
|
EquivalenceClasses<int> EqClasses;
|
|
// Form sets of odd and even numbers, check that we split them into these
|
|
// two sets correcrly.
|
|
for (int i = 0; i < 30; i += 2)
|
|
EqClasses.unionSets(0, i);
|
|
for (int i = 1; i < 30; i += 2)
|
|
EqClasses.unionSets(1, i);
|
|
|
|
for (int i = 0; i < 30; i++)
|
|
for (int j = 0; j < 30; j++)
|
|
if (i % 2 == j % 2)
|
|
EXPECT_TRUE(EqClasses.isEquivalent(i, j));
|
|
else
|
|
EXPECT_FALSE(EqClasses.isEquivalent(i, j));
|
|
}
|
|
|
|
TEST(EquivalenceClassesTest, MultipleSets) {
|
|
EquivalenceClasses<int> EqClasses;
|
|
// Split numbers from [0, 100) into sets so that values in the same set have
|
|
// equal remainders (mod 17).
|
|
for (int i = 0; i < 100; i++)
|
|
EqClasses.unionSets(i % 17, i);
|
|
|
|
for (int i = 0; i < 100; i++)
|
|
for (int j = 0; j < 100; j++)
|
|
if (i % 17 == j % 17)
|
|
EXPECT_TRUE(EqClasses.isEquivalent(i, j));
|
|
else
|
|
EXPECT_FALSE(EqClasses.isEquivalent(i, j));
|
|
}
|
|
|
|
} // llvm
|