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1 //===------------------------- dynamic_cast.pass.cpp ----------------------===//
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2 //
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3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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4 // See https://llvm.org/LICENSE.txt for license information.
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5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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6 //
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7 //===----------------------------------------------------------------------===//
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8
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9 #include <cassert>
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10
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11 // This test explicitly tests dynamic cast with types that have inaccessible
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12 // bases.
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13 #if defined(__clang__)
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14 #pragma clang diagnostic ignored "-Winaccessible-base"
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15 #endif
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16
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17 typedef char Pad1[43981];
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18 typedef char Pad2[34981];
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19 typedef char Pad3[93481];
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20 typedef char Pad4[13489];
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21 typedef char Pad5[81349];
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22 typedef char Pad6[34819];
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23 typedef char Pad7[3489];
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24
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25 namespace t1
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26 {
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27
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28 // PR33425
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29 struct C3 { virtual ~C3() {} Pad1 _; };
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30 struct C5 : protected virtual C3 { Pad2 _; };
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31 struct C6 : virtual C5 { Pad3 _; };
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32 struct C7 : virtual C3 { Pad4 _; };
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33 struct C9 : C6, C7 { Pad5 _; };
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34
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35 C9 c9;
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36 C3 *c3 = &c9;
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37
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38 void test()
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39 {
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40 assert(dynamic_cast<C3*>(c3) == static_cast<C3*>(&c9));
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41 assert(dynamic_cast<C5*>(c3) == static_cast<C5*>(&c9));
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42 assert(dynamic_cast<C6*>(c3) == static_cast<C6*>(&c9));
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43 assert(dynamic_cast<C7*>(c3) == static_cast<C7*>(&c9));
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44 assert(dynamic_cast<C9*>(c3) == static_cast<C9*>(&c9));
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45 }
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46
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47 } // t1
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48
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49 namespace t2
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50 {
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51
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52 // PR33425
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53 struct Src { virtual ~Src() {} Pad1 _; };
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54 struct Mask : protected virtual Src { Pad2 _; };
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55 struct Dest : Mask { Pad3 _; };
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56 struct Root : Dest, virtual Src { Pad4 _; };
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57
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58 Root root;
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59 Src *src = &root;
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60
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61 void test()
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62 {
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63 assert(dynamic_cast<Src*>(src) == static_cast<Src*>(&root));
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64 assert(dynamic_cast<Mask*>(src) == static_cast<Mask*>(&root));
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65 assert(dynamic_cast<Dest*>(src) == static_cast<Dest*>(&root));
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66 assert(dynamic_cast<Root*>(src) == static_cast<Root*>(&root));
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67 }
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68
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69 } // t2
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70
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71 namespace t3
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72 {
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73
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74 // PR33487
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75 struct Class1 { virtual ~Class1() {} Pad1 _; };
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76 struct Shared : virtual Class1 { Pad2 _; };
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77 struct Class6 : virtual Shared { Pad3 _; };
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78 struct Left : Class6 { Pad4 _; };
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79 struct Right : Class6 { Pad5 _; };
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80 struct Main : Left, Right { Pad6 _; };
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81
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82 Main m;
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83 Class1 *c1 = &m;
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84
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85 void test()
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86 {
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87 assert(dynamic_cast<Class1*>(c1) == static_cast<Class1*>(&m));
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88 assert(dynamic_cast<Shared*>(c1) == static_cast<Shared*>(&m));
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89 assert(dynamic_cast<Class6*>(c1) == 0);
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90 assert(dynamic_cast<Left*>(c1) == static_cast<Left*>(&m));
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91 assert(dynamic_cast<Right*>(c1) == static_cast<Right*>(&m));
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92 assert(dynamic_cast<Main*>(c1) == static_cast<Main*>(&m));
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93 }
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94
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95 } // t3
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96
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97 namespace t4
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98 {
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99
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100 // PR33439
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101 struct C2 { virtual ~C2() {} Pad1 _; };
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102 struct C3 { virtual ~C3() {} Pad2 _; };
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103 struct C4 : C3 { Pad3 _; };
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104 struct C8 : C2, virtual C4 { Pad4 _; };
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105 struct C9 : C4, C8 { Pad5 _; };
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106
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107 C9 c9;
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108 C2 *c2 = &c9;
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109
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110 void test()
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111 {
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112 assert(dynamic_cast<C2*>(c2) == static_cast<C2*>(&c9));
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113 assert(dynamic_cast<C3*>(c2) == 0);
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114 assert(dynamic_cast<C4*>(c2) == 0);
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115 assert(dynamic_cast<C8*>(c2) == static_cast<C8*>(&c9));
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116 assert(dynamic_cast<C9*>(c2) == static_cast<C9*>(&c9));
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117 }
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118
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119 } // t4
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120
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121 namespace t5
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122 {
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123
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124 // PR33439
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125 struct Dummy { virtual ~Dummy() {} Pad1 _; };
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126 struct Src { virtual ~Src() {} Pad2 _; };
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127 struct Dest : Dummy { Pad3 _; };
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128 struct A1 : Dest { Pad4 _; };
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129 struct A2 : Dest { Pad5 _; };
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130 struct Root : Src, A1, A2 { Pad6 _; };
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131
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132 Root root;
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133 Src *src = &root;
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134
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135 void test()
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136 {
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137 assert(dynamic_cast<Dummy*>(src) == 0);
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138 assert(dynamic_cast<Src*>(src) == static_cast<Src*>(&root));
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139 assert(dynamic_cast<Dest*>(src) == 0);
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140 assert(dynamic_cast<A1*>(src) == static_cast<A1*>(&root));
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141 assert(dynamic_cast<A2*>(src) == static_cast<A2*>(&root));
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142 }
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143
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144 } // t5
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145
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146 int main()
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147 {
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148 t1::test();
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149 t2::test();
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150 t3::test();
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151 t4::test();
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152 t5::test();
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153 }
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