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145
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1 /* PR tree-optimization/92765 - wrong code for strcmp of a union member
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2 { dg-do run }
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3 { dg-options "-O2 -Wall" } */
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4
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5 typedef __SIZE_TYPE__ size_t;
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6
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7 inline void* operator new (size_t, void *p)
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8 {
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9 return p;
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10 }
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11
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12 struct A { char a2[2]; };
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13 struct B { char a4[4]; };
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14
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15 __attribute__((noipa)) void
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16 sink (void*) { }
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17
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18 __attribute__((noipa)) void
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19 copy (char *d, const char *s)
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20 {
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21 while ((*d++ = *s++));
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22 }
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23
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24 __attribute__((noipa)) void
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25 store_and_compare (void *p)
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26 {
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27 A *a = new (p) A;
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28 sink (a->a2);
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29
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30 B *b = new (p) B;
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31 char *q = (char *) b->a4;
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32 copy (q, "abc");
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33
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34 if (__builtin_strcmp (q, "abc"))
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35 __builtin_abort ();
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36 }
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37
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38 int main ()
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39 {
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40 char a [sizeof (A) > sizeof (B) ? sizeof (A) : sizeof (B)];
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41 store_and_compare (a);
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42 }
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