Subversion Repositories scarts

/* This revealed a bug when rotates are expanded into

   two shifts.  */

/* { dg-do run } */

/* { dg-options "-O1 -std=c99" } */

#include <stdlib.h>

#if __INT_MAX__ == 2147483647

typedef unsigned int uint32_t;

#elif __LONG_MAX__ == 2147483647

typedef unsigned long uint32_t;

#else

#error unable to find 32-bit integer type

#endif

uint32_t

f (uint32_t *S, int j)

{

  uint32_t A, B, k, L[2] = {1234, 5678};

  int i, m;

  A = B = 0;

  for (i = 0; i < j; i++)

    {

      k = (S[i] + A + B) & 0xffffffffL;

      A = S[i] =

      ((k << (3 & 0x1f)) | ((k & 0xffffffff) >> (32 - (3 & 0x1f))));

      m = (int) (A + B);

      k = (L[i] + A + B) & 0xffffffffL;

      B = L[i] =

        ((k << (m & 0x1f)) | ((k & 0xffffffff) >> (32 - (m & 0x1f))));

    }

  return L[0] + L[1];

}

int

main ()

{

  uint32_t S[2] = {0xffff, 0xffffff};

  if (f (S,2)!= 1392607300)

    abort();

  return 0;

}