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111
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1 // PR c++/69662 - -Wplacement-new on allocated one element array members
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2 // Exercising -Wplacement-new=2.
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3 // { dg-do compile }
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4 // { dg-options "-Wno-pedantic -Wplacement-new=2" }
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5
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6 typedef __typeof__ (sizeof 0) size_t;
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7
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8 void* operator new (size_t, void *p) { return p; }
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9 void* operator new[] (size_t, void *p) { return p; }
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10
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11 struct Ax { char n, a []; };
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12 struct A0 { char n, a [0]; };
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13 struct A1 { char n, a [1]; };
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14 struct A2 { char n, a [2]; };
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15
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16 typedef __INT16_TYPE__ Int16;
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17 typedef __INT32_TYPE__ Int32;
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18
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19 void fAx (Ax *px, Ax &rx)
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20 {
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21 Ax ax;
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22
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23 new (ax.a) Int32; // { dg-warning "placement" }
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24 new (ax.a) Int32[1]; // { dg-warning "placement" }
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25
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26 new (px->a) Int32;
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27 new (px->a) Int32[1];
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28
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29 new (rx.a) Int32;
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30 new (rx.a) Int32[2];
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31 }
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32
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33 void fAx2 ()
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34 {
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35 // Initialization of non-static objects with flexible array members
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36 // isn't allowed in C and should perhaps be disallowed in C++ as
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37 // well to avoid c++/69696 - incorrect initialization of block-scope
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38 // flexible array members.
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39 Ax ax2 = { 1, { 2, 3 } };
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40
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41 new (ax2.a) Int16;
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42 new (ax2.a) Int16[1];
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43 new (ax2.a) Int16[2]; // { dg-warning "placement" }
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44 new (ax2.a) Int32; // { dg-warning "placement" }
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45 new (ax2.a) Int32[2]; // { dg-warning "placement" }
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46 }
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47
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48 void fAx3 ()
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49 {
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50 static Ax ax3 = { 1, { 2, 3, 4 } };
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51
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52 new (ax3.a) Int16;
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53 new (ax3.a) Int16[1];
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54 new (ax3.a) Int16[2]; // { dg-warning "placement" }
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55 new (ax3.a) Int32; // { dg-warning "placement" }
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56 new (ax3.a) Int32[1]; // { dg-warning "placement" }
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57 }
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58
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59 static Ax ax4 = { 1, { 2, 3, 4, 5 } };
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60
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61 void fAx4 ()
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62 {
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63 new (ax4.a) Int16;
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64 new (ax4.a) Int16[1];
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65 new (ax4.a) Int16[2];
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66 new (ax4.a) Int32;
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67 new (ax4.a) Int32[1];
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68 new (ax4.a) Int32[2]; // { dg-warning "placement" }
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69 }
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70
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71 void fA0 (A0 *p0, A0 &r0)
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72 {
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73 A0 a0;
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74
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75 new (a0.a) Int32; // { dg-warning "placement" }
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76 new (a0.a) Int32[1]; // { dg-warning "placement" }
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77
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78 new (p0->a) Int32;
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79 new (p0->a) Int32[1];
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80 new (p0->a) Int32[2];
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81
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82 new (r0.a) Int32;
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83 new (r0.a) Int32[1];
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84 new (r0.a) Int32[2];
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85 }
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86
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87 void fA1 (A1 *p1, A1 &r1)
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88 {
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89 A1 a1;
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90
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91 new (a1.a) Int32; // { dg-warning "placement" }
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92 new (a1.a) Int32[1]; // { dg-warning "placement" }
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93
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94 new (p1->a) Int32; // { dg-warning "placement" }
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95 new (p1->a) Int32[1]; // { dg-warning "placement" }
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96 new (p1->a) Int32[2]; // { dg-warning "placement" }
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97
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98 new (r1.a) Int32; // { dg-warning "placement" }
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99 new (r1.a) Int32[1]; // { dg-warning "placement" }
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100 new (r1.a) Int32[2]; // { dg-warning "placement" }
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101 }
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102
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103 void fA2 (A2 *p2, A2 &r2)
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104 {
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105 A2 a2;
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106 new (a2.a) Int32; // { dg-warning "placement" }
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107 new (a2.a) Int32[1]; // { dg-warning "placement" }
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108 new (a2.a) Int32[2]; // { dg-warning "placement" }
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109
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110 new (p2->a) Int32; // { dg-warning "placement" }
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111 new (p2->a) Int32[1]; // { dg-warning "placement" }
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112 new (p2->a) Int32[2]; // { dg-warning "placement" }
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113
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114 new (r2.a) Int32; // { dg-warning "placement" }
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115 new (r2.a) Int32[1]; // { dg-warning "placement" }
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116 new (r2.a) Int32[2]; // { dg-warning "placement" }
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117 }
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118
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119 struct BAx { int i; Ax ax; };
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120 struct BA0 { int i; A0 a0; };
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121 struct BA1 { int i; A1 a1; };
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122 struct BA2 { int i; A2 a2; };
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123
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124 void fBx (BAx *pbx, BAx &rbx)
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125 {
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126 BAx bax;
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127 new (bax.ax.a) char; // { dg-warning "placement" }
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128 new (bax.ax.a) Int16; // { dg-warning "placement" }
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129 new (bax.ax.a) Int32; // { dg-warning "placement" }
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130
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131 new (pbx->ax.a) char;
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132 new (rbx.ax.a) char;
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133 new (pbx->ax.a) Int16;
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134 new (rbx.ax.a) Int16;
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135 new (pbx->ax.a) Int32;
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136 new (rbx.ax.a) Int32;
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137 new (pbx->ax.a) int[1234];
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138 new (rbx.ax.a) int[5678];
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139 }
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140
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141 void fBx1 ()
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142 {
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131
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143 BAx bax1 = { 1, /* Ax = */ { 2, /* a[] = */ {} } };
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111
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144
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131
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145 new (bax1.ax.a) char; // { dg-warning "placement" }
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111
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146 new (bax1.ax.a) char[2]; // { dg-warning "placement" }
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147 new (bax1.ax.a) Int16; // { dg-warning "placement" }
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148 new (bax1.ax.a) Int32; // { dg-warning "placement" }
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149 }
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150
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151 void fB0 (BA0 *pb0, BA0 &rb0)
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152 {
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153 BA0 ba0;
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154 new (ba0.a0.a) Int32; // { dg-warning "placement" }
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155 new (pb0->a0.a) Int32;
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156 new (rb0.a0.a) Int32;
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157 }
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158
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159 void fB1 (BA1 *pb1, BA1 &rb1)
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160 {
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161 BA1 ba1;
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162 new (ba1.a1.a) Int32; // { dg-warning "placement" }
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163 new (pb1->a1.a) Int32; // { dg-warning "placement" }
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164 new (rb1.a1.a) Int32; // { dg-warning "placement" }
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165 }
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166
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167 void fB2 (BA2 *pb2, BA2 &rb2)
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168 {
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169 BA2 ba2;
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170 new (ba2.a2.a) Int32; // { dg-warning "placement" }
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171 new (pb2->a2.a) Int32; // { dg-warning "placement" }
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172 new (rb2.a2.a) Int32; // { dg-warning "placement" }
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173 }
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