gcc/testsuite/gcc.dg/vect/no-vfa-vect-102.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] = {2,3,4,5,6,7,8,9,9};
  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   for (i = 0; i < N; i++)
  25     {
  26       p->a[i] = a[i];
  27       asm volatile ("" ::: "memory");
  28     }
  29
  30   /* Not vectorizable: distance 1.  */
  31 #pragma GCC unroll 0
  32   for (i = 0; i < N - 1; i++)
  33     {
  34        *((int *)p + x + i + 1) = *((int *)p + x + i);
  35     }
  36
  37   /* check results: */
  38 #pragma GCC novector
  39   for (i = 0; i < N; i++)
  40     {
  41        if (p->a[i] != 1)
  42          abort();
  43     }
  44   return 0;
  45 }
  46
  47 int main (void)
  48 {
  49   check_vect ();
  50
  51   return main1 (0, N);
  52 }
  53
  54 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 0 "vect" } } */
  55 /* { dg-final { scan-tree-dump-times "possible dependence between data-refs" 1 "vect" { target { ! vect_multiple_sizes } } } } */
  56 /* { dg-final { scan-tree-dump "possible dependence between data-refs" "vect" { target vect_multiple_sizes } } } */
  57