unittests/ADT/IntEqClassesTest.cpp

   1 //===---- ADT/IntEqClassesTest.cpp - IntEqClasses unit tests ----*- C++ -*-===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 #include "llvm/ADT/IntEqClasses.h"
  11 #include "gtest/gtest.h"
  12
  13 using namespace llvm;
  14
  15 namespace {
  16
  17 TEST(IntEqClasses, Simple) {
  18   IntEqClasses ec(10);
  19
  20   ec.join(0, 1);
  21   ec.join(3, 2);
  22   ec.join(4, 5);
  23   ec.join(7, 6);
  24
  25   EXPECT_EQ(0u, ec.findLeader(0));
  26   EXPECT_EQ(0u, ec.findLeader(1));
  27   EXPECT_EQ(2u, ec.findLeader(2));
  28   EXPECT_EQ(2u, ec.findLeader(3));
  29   EXPECT_EQ(4u, ec.findLeader(4));
  30   EXPECT_EQ(4u, ec.findLeader(5));
  31   EXPECT_EQ(6u, ec.findLeader(6));
  32   EXPECT_EQ(6u, ec.findLeader(7));
  33   EXPECT_EQ(8u, ec.findLeader(8));
  34   EXPECT_EQ(9u, ec.findLeader(9));
  35
  36   // join two non-leaders.
  37   ec.join(1, 3);
  38
  39   EXPECT_EQ(0u, ec.findLeader(0));
  40   EXPECT_EQ(0u, ec.findLeader(1));
  41   EXPECT_EQ(0u, ec.findLeader(2));
  42   EXPECT_EQ(0u, ec.findLeader(3));
  43   EXPECT_EQ(4u, ec.findLeader(4));
  44   EXPECT_EQ(4u, ec.findLeader(5));
  45   EXPECT_EQ(6u, ec.findLeader(6));
  46   EXPECT_EQ(6u, ec.findLeader(7));
  47   EXPECT_EQ(8u, ec.findLeader(8));
  48   EXPECT_EQ(9u, ec.findLeader(9));
  49
  50   // join two leaders.
  51   ec.join(4, 8);
  52
  53   EXPECT_EQ(0u, ec.findLeader(0));
  54   EXPECT_EQ(0u, ec.findLeader(1));
  55   EXPECT_EQ(0u, ec.findLeader(2));
  56   EXPECT_EQ(0u, ec.findLeader(3));
  57   EXPECT_EQ(4u, ec.findLeader(4));
  58   EXPECT_EQ(4u, ec.findLeader(5));
  59   EXPECT_EQ(6u, ec.findLeader(6));
  60   EXPECT_EQ(6u, ec.findLeader(7));
  61   EXPECT_EQ(4u, ec.findLeader(8));
  62   EXPECT_EQ(9u, ec.findLeader(9));
  63
  64   // join mixed.
  65   ec.join(9, 1);
  66
  67   EXPECT_EQ(0u, ec.findLeader(0));
  68   EXPECT_EQ(0u, ec.findLeader(1));
  69   EXPECT_EQ(0u, ec.findLeader(2));
  70   EXPECT_EQ(0u, ec.findLeader(3));
  71   EXPECT_EQ(4u, ec.findLeader(4));
  72   EXPECT_EQ(4u, ec.findLeader(5));
  73   EXPECT_EQ(6u, ec.findLeader(6));
  74   EXPECT_EQ(6u, ec.findLeader(7));
  75   EXPECT_EQ(4u, ec.findLeader(8));
  76   EXPECT_EQ(0u, ec.findLeader(9));
  77
  78   // compressed map.
  79   ec.compress();
  80   EXPECT_EQ(3u, ec.getNumClasses());
  81
  82   EXPECT_EQ(0u, ec[0]);
  83   EXPECT_EQ(0u, ec[1]);
  84   EXPECT_EQ(0u, ec[2]);
  85   EXPECT_EQ(0u, ec[3]);
  86   EXPECT_EQ(1u, ec[4]);
  87   EXPECT_EQ(1u, ec[5]);
  88   EXPECT_EQ(2u, ec[6]);
  89   EXPECT_EQ(2u, ec[7]);
  90   EXPECT_EQ(1u, ec[8]);
  91   EXPECT_EQ(0u, ec[9]);
  92
  93   // uncompressed map.
  94   ec.uncompress();
  95   EXPECT_EQ(0u, ec.findLeader(0));
  96   EXPECT_EQ(0u, ec.findLeader(1));
  97   EXPECT_EQ(0u, ec.findLeader(2));
  98   EXPECT_EQ(0u, ec.findLeader(3));
  99   EXPECT_EQ(4u, ec.findLeader(4));
 100   EXPECT_EQ(4u, ec.findLeader(5));
 101   EXPECT_EQ(6u, ec.findLeader(6));
 102   EXPECT_EQ(6u, ec.findLeader(7));
 103   EXPECT_EQ(4u, ec.findLeader(8));
 104   EXPECT_EQ(0u, ec.findLeader(9));
 105 }
 106
 107 } // end anonymous namespace