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1 /* { dg-do run } */
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2 /* { dg-options "-O1" } */
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3
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4 #include <stdlib.h>
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5
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6 typedef union
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7 {
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8 struct
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9 {
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10 unsigned char a;
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11 unsigned char b;
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12 unsigned char c;
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13 unsigned char d;
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14 } parts;
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15 unsigned long whole;
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16 } T;
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17
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18 T *g_t;
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19
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20 void bar (unsigned long x)
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21 {
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22 if (x != 0)
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23 abort ();
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24 }
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25
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26 int main ()
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27 {
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28 T one;
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29 T two;
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30 T tmp1, tmp2;
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31
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32 one.whole = 0xFFE0E0E0UL;
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33 two.whole = 0xFF000000UL;
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34 tmp1.parts = two.parts;
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35 tmp2.parts = one.parts;
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36 tmp2.parts.c = tmp1.parts.c;
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37 one.parts = tmp2.parts;
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38
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39 g_t = &one;
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40 bar (0);
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41 return 0;
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42 }
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