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145
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1 /* PR middle-end/91647 - missing -Warray-bounds accessing a zero-length array
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2 of a declared object
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3 { dg-do "compile" }
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4 { dg-options "-O2 -Wall" } */
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5
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6 struct __attribute__ ((aligned (16))) A16
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7 {
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8 __INT64_TYPE__ i8;
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9 __INT16_TYPE__ i2;
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10 __INT16_TYPE__ a2[];
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11 };
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12
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13 struct A16 a0 = { };
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14
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15 void test_a0 (void)
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16 {
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17 // The first three elements fit in the tail padding.
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18 a0.a2[0] = 0; a0.a2[1] = 1; a0.a2[2] = 2;
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19
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20 a0.a2[3] = 3; // { dg-warning "array subscript 3 is above array bounds of 'short int\\\[0]'" }
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21 }
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22
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23
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24 struct A16 a1 = { .a2 = { 1 } };
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25
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26 void test_a1 (void)
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27 {
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28 a1.a2[0] = 0; a1.a2[1] = 1; a1.a2[2] = 2;
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29
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30 a1.a2[3] = 3; // { dg-warning "array subscript 3 is above array bounds of 'short int\\\[0]'" }
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31 }
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32
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33
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34 struct A16 a2 = { .a2 = { 1, 2 } };
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35
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36 void test_a2 (void)
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37 {
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38 a2.a2[0] = 0; a2.a2[1] = 1; a2.a2[2] = 2;
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39
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40 a2.a2[3] = 3; // { dg-warning "array subscript 3 is above array bounds of 'short int\\\[0]'" }
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41 }
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42
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43
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44 struct A16 a3 = { .a2 = { 1, 2, 3 } };
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45
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46 void test_a3 (void)
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47 {
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48 a3.a2[0] = 0; a3.a2[1] = 1; a3.a2[2] = 2;
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49
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50 a3.a2[3] = 3; // { dg-warning "array subscript 3 is above array bounds of 'short int\\\[0]'" }
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51 }
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52
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53
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54 struct A16 a4 = { .a2 = { 1, 2, 3, 4 } };
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55
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56 void test_a4 (void)
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57 {
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58 a4.a2[0] = 0; a4.a2[1] = 1; a4.a2[2] = 2; a4.a2[3] = 3;
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59
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60 a4.a2[4] = 4; // { dg-warning "array subscript 4 is above array bounds of 'short int\\\[0]'" }
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61 }
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62
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63
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64 struct A16 a5 = { .a2 = { 1, 2, 3, 4, 5 } };
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65
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66 void test_a5 (void)
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67 {
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68 a5.a2[0] = 0; a5.a2[1] = 1; a5.a2[2] = 2; a5.a2[3] = 3; a5.a2[4] = 4;
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69
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70 a5.a2[5] = 5; // { dg-warning "array subscript 5 is above array bounds of 'short int\\\[0]'" }
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71 }
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72
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73
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74 struct A16 a6 = { .a2 = { 1, 2, 3, 4, 5, 6 } };
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75
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76 void test_a6 (void)
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77 {
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78 a6.a2[0] = 0; a6.a2[1] = 1; a6.a2[2] = 2; a6.a2[3] = 3; a6.a2[4] = 4;
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79 a6.a2[5] = 5;
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80
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81 a6.a2[6] = 6; // { dg-warning "array subscript 6 is above array bounds of 'short int\\\[0]'" }
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82 }
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83
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84
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85 struct A16 a7 = { .a2 = { 1, 2, 3, 4, 5, 6, 7 } };
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86
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87 void test_a7 (void)
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88 {
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89 a7.a2[0] = 0; a7.a2[1] = 1; a7.a2[2] = 2; a7.a2[3] = 3; a7.a2[4] = 4;
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90 a7.a2[5] = 5; a7.a2[5] = 5; a7.a2[6] = 6;
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91
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92 a7.a2[7] = 7; // { dg-warning "array subscript 7 is above array bounds of 'short int\\\[0]'" }
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93 }
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94
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95
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96 struct A16 a8 = { .a2 = { 1, 2, 3, 4, 5, 6, 7, 8 } };
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97
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98 void test_a8 (void)
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99 {
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100 a8.a2[0] = 0; a8.a2[1] = 1; a8.a2[2] = 2; a8.a2[3] = 3; a8.a2[4] = 4;
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101 a8.a2[5] = 5; a8.a2[5] = 5; a8.a2[6] = 6; a8.a2[7] = 7;
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102
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103 a8.a2[8] = 8; // { dg-warning "array subscript 8 is above array bounds of 'short int\\\[0]'" }
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104 }
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105
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106
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107 struct A16 a9 = { .a2 = { 1, 2, 3, 4, 5, 6, 7, 8, 9 } };
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108
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109 void test_a9 (void)
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110 {
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111 a8.a2[0] = 8; a8.a2[1] = 7; a8.a2[2] = 6; a8.a2[3] = 5; a8.a2[4] = 4;
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112 a8.a2[5] = 3; a8.a2[5] = 2; a8.a2[6] = 1; a8.a2[7] = 0;
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113
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114 a8.a2[9] = 8; // { dg-warning "array subscript 9 is above array bounds of 'short int\\\[0]'" }
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115 }
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