gcc/testsuite/gcc.dg/attr-assume_aligned-1.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O3" } */
   3
   4 double *my_alloc1 (int len) __attribute__((__assume_aligned__ (16)));
   5 double *my_alloc2 (int len) __attribute__((__assume_aligned__ (32, 16)));
   6
   7 void
   8 test1 (int len)
   9 {
  10   int i;
  11   double *__restrict o1 = my_alloc1 (len);
  12   double *__restrict o2 = my_alloc1 (len);
  13   double *__restrict o3 = my_alloc1 (len);
  14   double *__restrict i1 = my_alloc1 (len);
  15   double *__restrict i2 = my_alloc1 (len);
  16   for (i = 0; i < len; ++i)
  17     {
  18       o1[i] = i1[i] * i2[i];
  19       o2[i] = i1[i] + i2[i];
  20       o3[i] = i1[i] - i2[i];
  21     }
  22 }
  23
  24 void
  25 test2 (int len)
  26 {
  27   int i;
  28   double *__restrict o1 = my_alloc2 (len);
  29   double *__restrict o2 = my_alloc2 (len);
  30   double *__restrict o3 = my_alloc2 (len);
  31   double *__restrict i1 = my_alloc2 (len);
  32   double *__restrict i2 = my_alloc2 (len);
  33   for (i = 0; i < len; ++i)
  34     {
  35       o1[i] = i1[i] * i2[i];
  36       o2[i] = i1[i] + i2[i];
  37       o3[i] = i1[i] - i2[i];
  38     }
  39 }