gcc/testsuite/gcc.dg/vect/no-vfa-vect-101.c

   1 /* { dg-require-effective-target vect_int } */
   2
   3 #include <stdlib.h>
   4 #include <stdarg.h>
   5 #include "tree-vect.h"
   6
   7 #define N 9
   8
   9 struct extraction
  10 {
  11   int a[N];
  12   int b[N];
  13 };
  14
  15 static int a[N] = {1,2,3,4,5,6,7,8,9};
  16 static int b[N] = {2,3,4,5,6,7,8,9,0};
  17
  18 __attribute__ ((noinline))
  19 int main1 (int x, int y) {
  20   int i;
  21   struct extraction *p;
  22   p = (struct extraction *) malloc (sizeof (struct extraction));
  23
  24   /* Not vectorizable: different unknown offset.  */
  25 #pragma GCC unroll 0
  26   for (i = 0; i < N; i++)
  27     {
  28       *((int *)p + x + i) = a[i];
  29       *((int *)p + y + i) = b[i];
  30     }
  31
  32   /* check results: */
  33 #pragma GCC novector
  34   for (i = 0; i < N; i++)
  35     {
  36        if (p->a[i] != a[i] || p->b[i] != b[i])
  37          abort();
  38     }
  39   return 0;
  40 }
  41
  42 int main (void)
  43 {
  44   check_vect ();
  45
  46   return main1 (0, N);
  47 }
  48
  49 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 0 "vect" } } */
  50 /* { dg-final { scan-tree-dump-times "can't determine dependence" 1 "vect" { target { ! vect_multiple_sizes } } } } */
  51 /* { dg-final { scan-tree-dump "can't determine dependence" "vect" { target vect_multiple_sizes } } } */
  52