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111
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1 /* { dg-do run } */
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2 /* { dg-options "-O2" } */
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3
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4 typedef __SIZE_TYPE__ size_t;
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5 extern void *malloc (size_t);
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6 extern void free (void *);
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7 extern void abort (void);
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8
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9 union U
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10 {
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11 struct S { int a; int b; } s;
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12 int t;
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13 };
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14
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15 struct T
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16 {
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17 int c;
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18 char d[1];
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19 };
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20
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21 int
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22 main (void)
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23 {
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24 union U *u = malloc (sizeof (struct S) + sizeof (struct T) + 6);
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25 struct T *t = (struct T *) (&u->s + 1);
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26 if (__builtin_object_size (t->d, 1)
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27 != sizeof (struct T) + 6 - __builtin_offsetof (struct T, d))
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28 abort ();
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29 free (u);
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30 return 0;
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31 }
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