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26b4e8ec0a
This implementation already exists as ConnectedVNInfoEqClasses in LiveInterval.cpp, and it seems to be generally useful to have a light-weight way of forming equivalence classes of small integers. IntEqClasses doesn't allow enumeration of the elements in a class. llvm-svn: 122293
108 lines
2.8 KiB
C++
108 lines
2.8 KiB
C++
//===---- ADT/IntEqClassesTest.cpp - IntEqClasses 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/IntEqClasses.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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TEST(IntEqClasses, Simple) {
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IntEqClasses ec(10);
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ec.join(0, 1);
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ec.join(3, 2);
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ec.join(4, 5);
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ec.join(7, 6);
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EXPECT_EQ(0u, ec.findLeader(0));
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EXPECT_EQ(0u, ec.findLeader(1));
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EXPECT_EQ(2u, ec.findLeader(2));
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EXPECT_EQ(2u, ec.findLeader(3));
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EXPECT_EQ(4u, ec.findLeader(4));
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EXPECT_EQ(4u, ec.findLeader(5));
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EXPECT_EQ(6u, ec.findLeader(6));
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EXPECT_EQ(6u, ec.findLeader(7));
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EXPECT_EQ(8u, ec.findLeader(8));
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EXPECT_EQ(9u, ec.findLeader(9));
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// join two non-leaders.
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ec.join(1, 3);
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EXPECT_EQ(0u, ec.findLeader(0));
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EXPECT_EQ(0u, ec.findLeader(1));
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EXPECT_EQ(0u, ec.findLeader(2));
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EXPECT_EQ(0u, ec.findLeader(3));
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EXPECT_EQ(4u, ec.findLeader(4));
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EXPECT_EQ(4u, ec.findLeader(5));
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EXPECT_EQ(6u, ec.findLeader(6));
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EXPECT_EQ(6u, ec.findLeader(7));
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EXPECT_EQ(8u, ec.findLeader(8));
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EXPECT_EQ(9u, ec.findLeader(9));
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// join two leaders.
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ec.join(4, 8);
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EXPECT_EQ(0u, ec.findLeader(0));
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EXPECT_EQ(0u, ec.findLeader(1));
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EXPECT_EQ(0u, ec.findLeader(2));
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EXPECT_EQ(0u, ec.findLeader(3));
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EXPECT_EQ(4u, ec.findLeader(4));
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EXPECT_EQ(4u, ec.findLeader(5));
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EXPECT_EQ(6u, ec.findLeader(6));
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EXPECT_EQ(6u, ec.findLeader(7));
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EXPECT_EQ(4u, ec.findLeader(8));
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EXPECT_EQ(9u, ec.findLeader(9));
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// join mixed.
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ec.join(9, 1);
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EXPECT_EQ(0u, ec.findLeader(0));
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EXPECT_EQ(0u, ec.findLeader(1));
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EXPECT_EQ(0u, ec.findLeader(2));
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EXPECT_EQ(0u, ec.findLeader(3));
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EXPECT_EQ(4u, ec.findLeader(4));
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EXPECT_EQ(4u, ec.findLeader(5));
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EXPECT_EQ(6u, ec.findLeader(6));
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EXPECT_EQ(6u, ec.findLeader(7));
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EXPECT_EQ(4u, ec.findLeader(8));
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EXPECT_EQ(0u, ec.findLeader(9));
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// compressed map.
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ec.compress();
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EXPECT_EQ(3u, ec.getNumClasses());
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EXPECT_EQ(0u, ec[0]);
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EXPECT_EQ(0u, ec[1]);
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EXPECT_EQ(0u, ec[2]);
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EXPECT_EQ(0u, ec[3]);
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EXPECT_EQ(1u, ec[4]);
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EXPECT_EQ(1u, ec[5]);
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EXPECT_EQ(2u, ec[6]);
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EXPECT_EQ(2u, ec[7]);
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EXPECT_EQ(1u, ec[8]);
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EXPECT_EQ(0u, ec[9]);
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// uncompressed map.
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ec.uncompress();
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EXPECT_EQ(0u, ec.findLeader(0));
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EXPECT_EQ(0u, ec.findLeader(1));
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EXPECT_EQ(0u, ec.findLeader(2));
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EXPECT_EQ(0u, ec.findLeader(3));
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EXPECT_EQ(4u, ec.findLeader(4));
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EXPECT_EQ(4u, ec.findLeader(5));
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EXPECT_EQ(6u, ec.findLeader(6));
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EXPECT_EQ(6u, ec.findLeader(7));
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EXPECT_EQ(4u, ec.findLeader(8));
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EXPECT_EQ(0u, ec.findLeader(9));
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}
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} // end anonymous namespace
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