gcc/testsuite/gcc.dg/vect/no-vfa-vect-102.c

   1 /* { dg-require-effective-target vect_int } */
   2 /* { dg-additional-options "--param vect-max-version-for-alias-checks=0" } */
   3
   4 #include <stdlib.h>
   5 #include <stdarg.h>
   6 #include "tree-vect.h"
   7
   8 #define N 9
   9
  10 struct extraction
  11 {
  12   int a[N];
  13   int b[N];
  14 };
  15
  16 static int a[N] = {1,2,3,4,5,6,7,8,9};
  17 static int b[N] = {2,3,4,5,6,7,8,9,9};
  18
  19 __attribute__ ((noinline))
  20 int main1 (int x, int y) {
  21   int i;
  22   struct extraction *p;
  23   p = (struct extraction *) malloc (sizeof (struct extraction));
  24
  25   for (i = 0; i < N; i++)
  26     {
  27       p->a[i] = a[i];
  28       asm volatile ("" ::: "memory");
  29     }
  30
  31   /* Not vectorizable: distance 1.  */
  32 #pragma GCC unroll 0
  33   for (i = 0; i < N - 1; i++)
  34     {
  35        *((int *)p + x + i + 1) = *((int *)p + x + i);
  36     }
  37
  38   /* check results: */
  39 #pragma GCC novector
  40   for (i = 0; i < N; i++)
  41     {
  42        if (p->a[i] != 1)
  43          abort();
  44     }
  45   return 0;
  46 }
  47
  48 int main (void)
  49 {
  50   check_vect ();
  51
  52   return main1 (0, N);
  53 }
  54
  55 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 0 "vect" } } */
  56 /* { dg-final { scan-tree-dump-times "possible dependence between data-refs" 1 "vect" { target { ! vect_multiple_sizes } } } } */
  57 /* { dg-final { scan-tree-dump "possible dependence between data-refs" "vect" { target vect_multiple_sizes } } } */
  58