unittests/ADT/PointerUnionTest.cpp

   1 //===- llvm/unittest/ADT/PointerUnionTest.cpp - Optional unit tests -------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "llvm/ADT/PointerUnion.h"
  10 #include "gtest/gtest.h"
  11 using namespace llvm;
  12
  13 namespace {
  14
  15 typedef PointerUnion<int *, float *> PU;
  16 typedef PointerUnion3<int *, float *, long long *> PU3;
  17 typedef PointerUnion4<int *, float *, long long *, double *> PU4;
  18
  19 struct PointerUnionTest : public testing::Test {
  20   float f;
  21   int i;
  22   double d;
  23   long long l;
  24
  25   PU a, b, c, n;
  26   PU3 i3, f3, l3;
  27   PU4 i4, f4, l4, d4;
  28   PU4 i4null, f4null, l4null, d4null;
  29
  30   PointerUnionTest()
  31       : f(3.14f), i(42), d(3.14), l(42), a(&f), b(&i), c(&i), n(), i3(&i),
  32         f3(&f), l3(&l), i4(&i), f4(&f), l4(&l), d4(&d), i4null((int *)nullptr),
  33         f4null((float *)nullptr), l4null((long long *)nullptr),
  34         d4null((double *)nullptr) {}
  35 };
  36
  37 TEST_F(PointerUnionTest, Comparison) {
  38   EXPECT_TRUE(a == a);
  39   EXPECT_FALSE(a != a);
  40   EXPECT_TRUE(a != b);
  41   EXPECT_FALSE(a == b);
  42   EXPECT_TRUE(b == c);
  43   EXPECT_FALSE(b != c);
  44   EXPECT_TRUE(b != n);
  45   EXPECT_FALSE(b == n);
  46   EXPECT_TRUE(i3 == i3);
  47   EXPECT_FALSE(i3 != i3);
  48   EXPECT_TRUE(i3 != f3);
  49   EXPECT_TRUE(f3 != l3);
  50   EXPECT_TRUE(i4 == i4);
  51   EXPECT_FALSE(i4 != i4);
  52   EXPECT_TRUE(i4 != f4);
  53   EXPECT_TRUE(i4 != l4);
  54   EXPECT_TRUE(f4 != l4);
  55   EXPECT_TRUE(l4 != d4);
  56   EXPECT_TRUE(i4null != f4null);
  57   EXPECT_TRUE(i4null != l4null);
  58   EXPECT_TRUE(i4null != d4null);
  59 }
  60
  61 TEST_F(PointerUnionTest, Null) {
  62   EXPECT_FALSE(a.isNull());
  63   EXPECT_FALSE(b.isNull());
  64   EXPECT_TRUE(n.isNull());
  65   EXPECT_FALSE(!a);
  66   EXPECT_FALSE(!b);
  67   EXPECT_TRUE(!n);
  68   // workaround an issue with EXPECT macros and explicit bool
  69   EXPECT_TRUE((bool)a);
  70   EXPECT_TRUE((bool)b);
  71   EXPECT_FALSE(n);
  72
  73   EXPECT_NE(n, b);
  74   EXPECT_EQ(b, c);
  75   b = nullptr;
  76   EXPECT_EQ(n, b);
  77   EXPECT_NE(b, c);
  78   EXPECT_FALSE(i3.isNull());
  79   EXPECT_FALSE(f3.isNull());
  80   EXPECT_FALSE(l3.isNull());
  81   EXPECT_FALSE(i4.isNull());
  82   EXPECT_FALSE(f4.isNull());
  83   EXPECT_FALSE(l4.isNull());
  84   EXPECT_FALSE(d4.isNull());
  85   EXPECT_TRUE(i4null.isNull());
  86   EXPECT_TRUE(f4null.isNull());
  87   EXPECT_TRUE(l4null.isNull());
  88   EXPECT_TRUE(d4null.isNull());
  89 }
  90
  91 TEST_F(PointerUnionTest, Is) {
  92   EXPECT_FALSE(a.is<int *>());
  93   EXPECT_TRUE(a.is<float *>());
  94   EXPECT_TRUE(b.is<int *>());
  95   EXPECT_FALSE(b.is<float *>());
  96   EXPECT_TRUE(n.is<int *>());
  97   EXPECT_FALSE(n.is<float *>());
  98   EXPECT_TRUE(i3.is<int *>());
  99   EXPECT_TRUE(f3.is<float *>());
 100   EXPECT_TRUE(l3.is<long long *>());
 101   EXPECT_TRUE(i4.is<int *>());
 102   EXPECT_TRUE(f4.is<float *>());
 103   EXPECT_TRUE(l4.is<long long *>());
 104   EXPECT_TRUE(d4.is<double *>());
 105   EXPECT_TRUE(i4null.is<int *>());
 106   EXPECT_TRUE(f4null.is<float *>());
 107   EXPECT_TRUE(l4null.is<long long *>());
 108   EXPECT_TRUE(d4null.is<double *>());
 109 }
 110
 111 TEST_F(PointerUnionTest, Get) {
 112   EXPECT_EQ(a.get<float *>(), &f);
 113   EXPECT_EQ(b.get<int *>(), &i);
 114   EXPECT_EQ(n.get<int *>(), (int *)nullptr);
 115 }
 116
 117 template<int I> struct alignas(8) Aligned {};
 118
 119 typedef PointerUnion<Aligned<0> *, Aligned<1> *, Aligned<2> *, Aligned<3> *,
 120                      Aligned<4> *, Aligned<5> *, Aligned<6> *, Aligned<7> *>
 121     PU8;
 122
 123 TEST_F(PointerUnionTest, ManyElements) {
 124   Aligned<0> a0;
 125   Aligned<7> a7;
 126
 127   PU8 a = &a0;
 128   EXPECT_TRUE(a.is<Aligned<0>*>());
 129   EXPECT_FALSE(a.is<Aligned<1>*>());
 130   EXPECT_FALSE(a.is<Aligned<2>*>());
 131   EXPECT_FALSE(a.is<Aligned<3>*>());
 132   EXPECT_FALSE(a.is<Aligned<4>*>());
 133   EXPECT_FALSE(a.is<Aligned<5>*>());
 134   EXPECT_FALSE(a.is<Aligned<6>*>());
 135   EXPECT_FALSE(a.is<Aligned<7>*>());
 136   EXPECT_EQ(a.dyn_cast<Aligned<0>*>(), &a0);
 137   EXPECT_EQ(*a.getAddrOfPtr1(), &a0);
 138
 139   a = &a7;
 140   EXPECT_FALSE(a.is<Aligned<0>*>());
 141   EXPECT_FALSE(a.is<Aligned<1>*>());
 142   EXPECT_FALSE(a.is<Aligned<2>*>());
 143   EXPECT_FALSE(a.is<Aligned<3>*>());
 144   EXPECT_FALSE(a.is<Aligned<4>*>());
 145   EXPECT_FALSE(a.is<Aligned<5>*>());
 146   EXPECT_FALSE(a.is<Aligned<6>*>());
 147   EXPECT_TRUE(a.is<Aligned<7>*>());
 148   EXPECT_EQ(a.dyn_cast<Aligned<7>*>(), &a7);
 149
 150   EXPECT_TRUE(a == PU8(&a7));
 151   EXPECT_TRUE(a != PU8(&a0));
 152 }
 153
 154 TEST_F(PointerUnionTest, GetAddrOfPtr1) {
 155   EXPECT_TRUE((void *)b.getAddrOfPtr1() == (void *)&b);
 156   EXPECT_TRUE((void *)n.getAddrOfPtr1() == (void *)&n);
 157 }
 158
 159 } // end anonymous namespace