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//===---- ADT/IntEqClassesTest.cpp - IntEqClasses unit tests ----*- C++ -*-===//
//
// 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/IntEqClasses.h"
#include "gtest/gtest.h"
using namespace llvm;
namespace {
TEST(IntEqClasses, Simple) {
IntEqClasses ec(10);
ec.join(0, 1);
ec.join(3, 2);
ec.join(4, 5);
ec.join(7, 6);
EXPECT_EQ(0u, ec.findLeader(0));
EXPECT_EQ(0u, ec.findLeader(1));
EXPECT_EQ(2u, ec.findLeader(2));
EXPECT_EQ(2u, ec.findLeader(3));
EXPECT_EQ(4u, ec.findLeader(4));
EXPECT_EQ(4u, ec.findLeader(5));
EXPECT_EQ(6u, ec.findLeader(6));
EXPECT_EQ(6u, ec.findLeader(7));
EXPECT_EQ(8u, ec.findLeader(8));
EXPECT_EQ(9u, ec.findLeader(9));
// join two non-leaders.
ec.join(1, 3);
EXPECT_EQ(0u, ec.findLeader(0));
EXPECT_EQ(0u, ec.findLeader(1));
EXPECT_EQ(0u, ec.findLeader(2));
EXPECT_EQ(0u, ec.findLeader(3));
EXPECT_EQ(4u, ec.findLeader(4));
EXPECT_EQ(4u, ec.findLeader(5));
EXPECT_EQ(6u, ec.findLeader(6));
EXPECT_EQ(6u, ec.findLeader(7));
EXPECT_EQ(8u, ec.findLeader(8));
EXPECT_EQ(9u, ec.findLeader(9));
// join two leaders.
ec.join(4, 8);
EXPECT_EQ(0u, ec.findLeader(0));
EXPECT_EQ(0u, ec.findLeader(1));
EXPECT_EQ(0u, ec.findLeader(2));
EXPECT_EQ(0u, ec.findLeader(3));
EXPECT_EQ(4u, ec.findLeader(4));
EXPECT_EQ(4u, ec.findLeader(5));
EXPECT_EQ(6u, ec.findLeader(6));
EXPECT_EQ(6u, ec.findLeader(7));
EXPECT_EQ(4u, ec.findLeader(8));
EXPECT_EQ(9u, ec.findLeader(9));
// join mixed.
ec.join(9, 1);
EXPECT_EQ(0u, ec.findLeader(0));
EXPECT_EQ(0u, ec.findLeader(1));
EXPECT_EQ(0u, ec.findLeader(2));
EXPECT_EQ(0u, ec.findLeader(3));
EXPECT_EQ(4u, ec.findLeader(4));
EXPECT_EQ(4u, ec.findLeader(5));
EXPECT_EQ(6u, ec.findLeader(6));
EXPECT_EQ(6u, ec.findLeader(7));
EXPECT_EQ(4u, ec.findLeader(8));
EXPECT_EQ(0u, ec.findLeader(9));
// compressed map.
ec.compress();
EXPECT_EQ(3u, ec.getNumClasses());
EXPECT_EQ(0u, ec[0]);
EXPECT_EQ(0u, ec[1]);
EXPECT_EQ(0u, ec[2]);
EXPECT_EQ(0u, ec[3]);
EXPECT_EQ(1u, ec[4]);
EXPECT_EQ(1u, ec[5]);
EXPECT_EQ(2u, ec[6]);
EXPECT_EQ(2u, ec[7]);
EXPECT_EQ(1u, ec[8]);
EXPECT_EQ(0u, ec[9]);
// uncompressed map.
ec.uncompress();
EXPECT_EQ(0u, ec.findLeader(0));
EXPECT_EQ(0u, ec.findLeader(1));
EXPECT_EQ(0u, ec.findLeader(2));
EXPECT_EQ(0u, ec.findLeader(3));
EXPECT_EQ(4u, ec.findLeader(4));
EXPECT_EQ(4u, ec.findLeader(5));
EXPECT_EQ(6u, ec.findLeader(6));
EXPECT_EQ(6u, ec.findLeader(7));
EXPECT_EQ(4u, ec.findLeader(8));
EXPECT_EQ(0u, ec.findLeader(9));
}
} // end anonymous namespace
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