gcc/testsuite/gcc.c-torture/execute/pr33669.c

   1 extern void abort (void);
   2
   3 typedef struct foo_t
   4 {
   5   unsigned int blksz;
   6   unsigned int bf_cnt;
   7 } foo_t;
   8
   9 #define _RNDUP(x, unit)  ((((x) + (unit) - 1) / (unit)) * (unit))
  10 #define _RNDDOWN(x, unit)  ((x) - ((x)%(unit)))
  11
  12 long long
  13 foo (foo_t *const pxp,  long long offset, unsigned int extent)
  14 {
  15   long long blkoffset = _RNDDOWN(offset, (long long )pxp->blksz);
  16   unsigned int diff = (unsigned int)(offset - blkoffset);
  17   unsigned int blkextent = _RNDUP(diff + extent, pxp->blksz);
  18
  19   if (pxp->blksz < blkextent)
  20     return -1LL;
  21
  22   if (pxp->bf_cnt > pxp->blksz)
  23     pxp->bf_cnt = pxp->blksz;
  24
  25   return blkoffset;
  26 }
  27
  28 int
  29 main ()
  30 {
  31   foo_t x;
  32   long long xx;
  33
  34   x.blksz = 8192;
  35   x.bf_cnt = 0;
  36   xx = foo (&x, 0, 4096);
  37   if (xx != 0LL)
  38     abort ();
  39   return 0;
  40 }