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111
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1 /* Test for MS bitfield layout */
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2 /* { dg-do run { target *-*-mingw* *-*-cygwin* i?86-*-* x86_64-*-* } } */
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3
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4 extern void abort();
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5
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6 struct s1_t {
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7 char a;
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8 char b __attribute__ ((aligned (16)));
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9 } __attribute__ ((ms_struct));
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10 struct s1_t s1;
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11
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12 struct s2_t {
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13 char a;
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14 char b;
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15 } __attribute__ ((ms_struct));
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16 struct s2_t s2;
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17
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18 struct s3_t {
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19 __extension__ char a : 6;
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20 char b __attribute__ ((aligned (16)));
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21 } __attribute__ ((ms_struct));
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22 struct s3_t s3;
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23
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24 struct s4_t {
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25 __extension__ char a : 6;
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26 char b __attribute__ ((aligned (2)));
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27 } __attribute__ ((ms_struct));
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28 struct s4_t s4;
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29
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30 struct s5_t {
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31 __extension__ char a : 6;
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32 char b __attribute__ ((aligned (1)));
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33 } __attribute__ ((ms_struct));
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34 struct s5_t s5;
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35
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36 __extension__
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37 static __PTRDIFF_TYPE__ offs (const void *a, const void *b)
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38 {
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39 return (__PTRDIFF_TYPE__) ((const char*)a - (const char*)b);
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40 }
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41
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42 int main()
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43 {
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44 if (offs (&s1.b, &s1) != 16
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45 || offs (&s2.b, &s2) != 1
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46 || offs (&s3.b, &s3) != 16
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47 || offs (&s4.b, &s4) != 2
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48 || offs (&s5.b, &s5) != 1)
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49 abort ();
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50 return 0;
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51 }
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52
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