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111
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1 /* This revealed a bug when rotates are expanded into
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2 two shifts. */
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3
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4 /* { dg-do run } */
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5 /* { dg-options "-O1 -std=c99" } */
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6
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7 extern void abort (void);
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8
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9 #if __INT_MAX__ == 2147483647
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10 typedef unsigned int uint32_t;
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11 #elif __LONG_MAX__ == 2147483647
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12 typedef unsigned long uint32_t;
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13 #else
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14 #error unable to find 32-bit integer type
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15 #endif
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16
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17 uint32_t
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18 f (uint32_t *S, int j)
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19 {
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20 uint32_t A, B, k, L[2] = {1234, 5678};
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21 int i, m;
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22
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23 A = B = 0;
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24 for (i = 0; i < j; i++)
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25 {
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26 k = (S[i] + A + B) & 0xffffffffL;
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27 A = S[i] =
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28 ((k << (3 & 0x1f)) | ((k & 0xffffffff) >> (32 - (3 & 0x1f))));
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29
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30 m = (int) (A + B);
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31 k = (L[i] + A + B) & 0xffffffffL;
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32 B = L[i] =
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33 ((k << (m & 0x1f)) | ((k & 0xffffffff) >> (32 - (m & 0x1f))));
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34 }
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35 return L[0] + L[1];
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36 }
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37
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38 int
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39 main ()
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40 {
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41 uint32_t S[2] = {0xffff, 0xffffff};
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42
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43 if (f (S,2)!= 1392607300)
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44 abort();
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45
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46 return 0;
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47 }
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