gcc/testsuite/gcc.dg/vect/vect-gather-2.c

   1 /* { dg-do compile } */
   2
   3 #define N 16
   4
   5 void
   6 f1 (int *restrict y, int *restrict x1, int *restrict x2,
   7     int *restrict indices)
   8 {
   9   for (int i = 0; i < N; ++i)
  10     {
  11       /* Different base.  */
  12       y[i * 2] = x1[indices[i * 2]] + 1;
  13       y[i * 2 + 1] = x2[indices[i * 2 + 1]] + 2;
  14     }
  15 }
  16
  17 void
  18 f2 (int *restrict y, int *restrict x, int *restrict indices)
  19 {
  20   for (int i = 0; i < N; ++i)
  21     {
  22       /* Different scale.  */
  23       y[i * 2] = *(int *)((char *)x + (__UINTPTR_TYPE__)indices[i * 2] * 4) + 1;
  24       y[i * 2 + 1] = *(int *)((char *)x + (__UINTPTR_TYPE__)indices[i * 2 + 1] * 2) + 2;
  25     }
  26 }
  27
  28 void
  29 f3 (int *restrict y, int *restrict x, int *restrict indices)
  30 {
  31   for (int i = 0; i < N; ++i)
  32     {
  33       /* Different type.  */
  34       y[i * 2] = x[indices[i * 2]] + 1;
  35       y[i * 2 + 1] = x[((unsigned int *) indices)[i * 2 + 1]] + 2;
  36     }
  37 }
  38
  39 /* { dg-final { scan-tree-dump "different gather base" vect { target { ! vect_gather_load_ifn } } } } */
  40 /* { dg-final { scan-tree-dump "different gather scale" vect { target { ! vect_gather_load_ifn } } } } */