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131
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1 /* PR tree-optimization/82588 - missing -Warray-bounds on an excessively
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2 large index
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3 { dg-do compile }
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4 { dg-require-effective-target alloca }
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5 { dg-options "-O2 -Warray-bounds -ftrack-macro-expansion=0" } */
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6
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7 #include "../gcc.dg/range.h"
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8
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9 #define offsetof(T, m) __builtin_offsetof (T, m)
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10
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11 typedef struct AX { int n; char ax[]; } AX;
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12
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13 typedef struct A1 { int i; char a1[1]; } A1;
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14 typedef struct B { int i; struct A1 a1x[]; } B;
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15
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16 void sink (int, ...);
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17
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18 #define R(min, max) signed_range (min, max)
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19 #define T(expr) sink (0, expr)
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20
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21 struct __attribute__ ((packed)) S16 { unsigned i: 16; };
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22
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23 void farr_char (void)
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24 {
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25 extern char ac[];
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26
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27 T (ac[DIFF_MIN]); /* { dg-warning "array subscript -\[0-9\]+ is below array bounds of .char *\\\[]." } */
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28 T (ac[-1]); /* { dg-warning "array subscript -1 is below array bounds" } */
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29 T (ac[0]);
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30
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31 T (ac[DIFF_MAX - 1]);
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32 T (ac[DIFF_MAX]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
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33 T (ac[DIFF_MAX + (size_t)1]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
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34 T (ac[SIZE_MAX]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
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35 T (ac[R (DIFF_MAX - 1, DIFF_MAX)]);
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36 T (ac[R (DIFF_MIN + 1, -1)]); /* { dg-warning "array subscript -1 is below array bounds" } */
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37 T (ac[R (DIFF_MIN + 1, 0)]);
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38 T (ac[R (-1, 0)]);
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39 T (ac[R (-1, 1)]);
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40 }
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41
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42 void farr_s16 (void)
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43 {
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44 extern struct S16 ax[];
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45
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46 T (ax[DIFF_MIN]); /* { dg-warning "array subscript -\[0-9\]+ is below array bounds of .(struct )?S16 *\\\[]." } */
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47 T (ax[-1]); /* { dg-warning "array subscript -1 is below array bounds" } */
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48 T (ax[0]);
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49
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50 T (ax[DIFF_MAX / 2 - 1]);
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51 T (ax[DIFF_MAX / 2]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
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52 T (ax[DIFF_MAX / 2 + (size_t)1]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
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53 T (ax[SIZE_MAX]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
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54 T (ax[R (DIFF_MIN, -1)]); /* { dg-warning "array subscript -1 is below array bounds" } */
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55 T (ax[R (DIFF_MAX / 2 - 1, DIFF_MAX)]);
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56 T (ax[R (DIFF_MAX / 2, DIFF_MAX)]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
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57 }
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58
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59 void farr_s16_7 (void)
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60 {
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61 extern struct S16 ax_7[][7];
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62
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63 T (ax_7[0][DIFF_MIN]); /* { dg-warning "array subscript -\[0-9\]+ is below array bounds of .(struct )?S16 *\\\[7]." } */
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64 T (ax_7[0][-1]); /* { dg-warning "array subscript -1 is below array bounds" } */
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65 T (ax_7[0][0]);
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66 T (ax_7[0][7]); /* { dg-warning "array subscript 7 is above array bounds of .(struct )?S16 *\\\[7]." } */
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67 T (ax_7[0][8]); /* { dg-warning "array subscript 8 is above array bounds of .(struct )?S16 *\\\[7]." } */
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68
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69 T (ax_7[0][DIFF_MAX / 2]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
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70 T (ax_7[0][SIZE_MAX]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
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71
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72 T (ax_7[DIFF_MIN][0]); /* { dg-warning "array subscript -\[0-9\]+ is below array bounds of .(struct )?S16 *\\\[]\\\[7]." } */
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73 T (ax_7[-1][0]); /* { dg-warning "array subscript -1 is below array bounds" } */
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74
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75 T (ax_7[DIFF_MAX / 2][0]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
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76 T (ax_7[SIZE_MAX][0]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
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77
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78 ptrdiff_t i = R (DIFF_MIN, -1);
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79 T (ax_7[i][0]); /* { dg-warning "array subscript -1 is below array bounds" } */
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80
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81 T (ax_7[R (DIFF_MIN, -1)][0]); /* { dg-warning "array subscript -1 is below array bounds" } */
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82 T (ax_7[R (DIFF_MIN, 0)][0]);
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83 T (ax_7[R (-2, -1)][0]); /* { dg-warning "array subscript -1 is below array bounds" } */
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84 T (ax_7[R (-1, 0)][0]);
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85 T (ax_7[R (-1, 1)][0]);
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86 T (ax_7[R (-1, 7)][0]);
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87 T (ax_7[R (-1, DIFF_MAX)][0]);
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88
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89 T (ax_7[R ( 1, DIFF_MAX)][0]);
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90 T (ax_7[R (DIFF_MAX / 14 - 1, DIFF_MAX)][0]);
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91
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92 i = R (DIFF_MAX / 14, DIFF_MAX);
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93 T (ax_7[i][0]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
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94
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95 T (ax_7[0][R (DIFF_MIN, 0)]);
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96 T (ax_7[0][R (-1, 0)]);
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97 T (ax_7[0][R (-1, 1)]);
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98 T (ax_7[0][R (-1, 7)]);
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99 T (ax_7[0][R (-1, DIFF_MAX)]);
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100 T (ax_7[0][R (-1, DIFF_MAX)]);
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101
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102 T (ax_7[0][R (1, DIFF_MAX)]);
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103 T (ax_7[0][R (7, DIFF_MAX)]); /* { dg-warning "array subscript 7 is above array bounds" } */
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104
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105 }
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106
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107 void farr_x_5_7 (void)
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108 {
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109 extern struct S16 a[][5][7];
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110
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111 T (a[0][0][-3]); /* { dg-warning "array subscript -3 is below array bounds of .(struct )?S16 *\\\[7]." } */
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112 T (a[0][-2][0]); /* { dg-warning "array subscript -2 is below array bounds of .(struct )?S16 *\\\[5]\\\[7]." } */
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113 T (a[-1][0][0]); /* { dg-warning "array subscript -1 is below array bounds of .(struct )?S16 *\\\[]\\\[5]\\\[7]." } */
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114 T (a[R (-4, -3)][0][0]); /* { dg-warning "array subscript -3 is below array bounds" } */
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115 T (a[0][R (-3, -2)][0]); /* { dg-warning "array subscript -2 is below array bounds" } */
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116 T (a[0][0][R (-2, -1)]); /* { dg-warning "array subscript -1 is below array bounds" } */
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117 }
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118
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119
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120 void fax (struct AX *p)
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121 {
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122 T (p->ax[DIFF_MIN]); /* { dg-warning "array subscript -\[0-9\]+ is below array bounds" } */
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123 T (p->ax[-1]); /* { dg-warning "array subscript -1 is below array bounds" } */
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124 T (p->ax[0]);
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125 T (p->ax[DIFF_MAX - sizeof *p - 1]);
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126 T (p->ax[DIFF_MAX - sizeof *p]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
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127 T (p->ax[DIFF_MAX - sizeof *p + 1]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
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128 T (p->ax[SIZE_MAX]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
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129 T (p->ax[R (DIFF_MIN, -1)]); /* { dg-warning "array subscript -1 is below array bounds" } */
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130 T (p->ax[R (-1, 1)]);
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131 T (p->ax[R (0, DIFF_MAX - 1)]);
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132 T (p->ax[R (DIFF_MAX - 1, DIFF_MAX)]);/* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
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133 }
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134
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135 void fa1 (struct A1 *p)
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136 {
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137 T (p->a1[DIFF_MIN]); /* { dg-warning "array subscript -\[0-9\]+ is below array bounds" } */
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138 T (p->a1[-1]); /* { dg-warning "array subscript -1 is below array bounds" } */
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139 T (p->a1[0]);
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140 T (p->a1[9]);
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141 T (p->a1[DIFF_MAX - offsetof (A1, a1) - 1]);
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142 T (p->a1[DIFF_MAX - offsetof (A1, a1)]);/* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
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143 T (p->a1[DIFF_MAX - offsetof (A1, a1) + 1]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
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144 T (p->a1[SIZE_MAX]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
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145 }
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146
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147 void fb (struct B *p)
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148 {
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149 T (p->a1x->a1[DIFF_MIN]); /* { dg-warning "array subscript -\[0-9\]+ is below array bounds" } */
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150 T (p->a1x->a1[-1]); /* { dg-warning "array subscript -1 is below array bounds" } */
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151 T (p->a1x->a1[0]);
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152 T (p->a1x->a1[9]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
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153 T (p->a1x->a1[DIFF_MAX - sizeof *p]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
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154 T (p->a1x->a1[DIFF_MAX - sizeof *p + 1]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
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155 T (p->a1x->a1[SIZE_MAX]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
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156
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157 T (p->a1x[1].a1[DIFF_MIN]); /* { dg-warning "array subscript -\[0-9\]+ is below array bounds" } */
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158 T (p->a1x[1].a1[-1]); /* { dg-warning "array subscript -1 is below array bounds" } */
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159 T (p->a1x[1].a1[0]);
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160 T (p->a1x[1].a1[9]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
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161 T (p->a1x[1].a1[DIFF_MAX - sizeof *p]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
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162 T (p->a1x[1].a1[DIFF_MAX - sizeof *p + 1]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
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163 T (p->a1x[1].a1[SIZE_MAX]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
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164
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165 T (p->a1x[2].a1[DIFF_MIN]); /* { dg-warning "array subscript -\[0-9\]+ is below array bounds" } */
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166 T (p->a1x[2].a1[-1]); /* { dg-warning "array subscript -1 is below array bounds" } */
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167 T (p->a1x[2].a1[0]);
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168 T (p->a1x[2].a1[9]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
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169 T (p->a1x[2].a1[DIFF_MAX - sizeof *p]);/* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
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170 T (p->a1x[2].a1[DIFF_MAX - sizeof *p + 1]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
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171 T (p->a1x[2].a1[SIZE_MAX]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
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172
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173 T (p->a1x[3].a1[DIFF_MIN]); /* { dg-warning "array subscript -\[0-9\]+ is below array bounds" } */
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174 T (p->a1x[3].a1[-1]); /* { dg-warning "array subscript -1 is below array bounds" } */
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175 T (p->a1x[3].a1[0]);
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176 T (p->a1x[3].a1[9]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
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177
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178 T (p->a1x[9].a1[0]);
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179
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180 enum { MAX = (DIFF_MAX - sizeof *p) / sizeof *p->a1x };
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181
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182 T (p->a1x[DIFF_MIN].a1); /* { dg-warning "array subscript -\[0-9\]+ is below array bounds" } */
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183 T (p->a1x[-1].a1); /* { dg-warning "array subscript -1 is below array bounds" } */
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184 T (p->a1x[MAX].a1);
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185 T (p->a1x[MAX + 2].a1); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
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186
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187 T (p->a1x[DIFF_MAX].a1); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
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188 T (p->a1x[SIZE_MAX].a1); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
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189
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190 T (p->a1x[DIFF_MIN].a1[0]); /* { dg-warning "array subscript -\[0-9\]+ is below array bounds" } */
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191 T (p->a1x[-1].a1[0]) /* { dg-warning "array subscript -1 is below array bounds" } */;
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192 T (p->a1x[MAX - 1].a1[0]);
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193 T (p->a1x[MAX].a1[0]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
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194 T (p->a1x[MAX + 1].a1[0]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
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195
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196 T (p->a1x[DIFF_MAX].a1[0]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
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197 T (p->a1x[SIZE_MAX].a1[0]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" } */
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198 }
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199
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200 void f_cststring (int i)
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201 {
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202 T (""[DIFF_MIN]); /* { dg-warning "array subscript -\[0-9\]+ is below array bounds of .(const )?char *\\\[1]" "string" { xfail lp64 } } */
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203 T (""[DIFF_MIN + 1]); /* { dg-warning "array subscript -\[0-9\]+ is below array bounds of .(const )?char *\\\[1]" "string" } */
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204 T (""[-1]); /* { dg-warning "array subscript -1 is below array bounds of .(const )?char *\\\[1]" "string" } */
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205 T (""[0]);
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206 T (""[1]); /* { dg-warning "array subscript 1 is above array bounds of .(const )?char *\\\[1]" "string" } */
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207 T ("0"[2]); /* { dg-warning "array subscript 2 is above array bounds of .(const )?char *\\\[2]" "string" } */
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208 T ("012"[2]);
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209 T ("012"[3]);
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210 T ("012"[4]); /* { dg-warning "array subscript 4 is above array bounds of .(const )?char *\\\[4]" "string" } */
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211 T ("0123"[DIFF_MAX]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds of .(const )?char *\\\[5]" "string" } */
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212 T ("0123"[SIZE_MAX]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds of .(const )?char *\\\[5]" "string" } */
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213 }
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214
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215 void fb_strlen (struct B *p)
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216 {
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217 #define strlen __builtin_strlen
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218
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219 T (strlen (&p->a1x[0].a1[2])); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" "strlen" } */
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220 T (strlen (p->a1x[0].a1 + 2)); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" "strlen" { xfail *-*-* } } */
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221 }
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222
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223
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224 void f_vla (unsigned n)
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225 {
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226 char vla[n];
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227
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228 T (vla[DIFF_MIN]); /* { dg-warning "array subscript -\[0-9\]+ is below array bounds" "vla" } */
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229 T (vla[-1]); /* { dg-warning "array subscript -1 is below array bounds" "vla" } */
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230 T (vla[0]);
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231 T (vla[1]);
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232 T (vla[n - 1]);
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233 /* It would be nice to diagnose this. */
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234 T (vla[n]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" "bug 82608" { xfail *-*-*} } */
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235 T (vla[DIFF_MAX]); /* { dg-warning "array subscript \[0-9\]+ is above array bounds" "vla" } */
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236 }
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