gcc/testsuite/gcc.dg/vect/no-vfa-vect-102a.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 volatile int foo;
  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        if (foo == 135)
  29          abort (); /* to avoid vectorization  */
  30     }
  31
  32   /* Not vectorizable: distance 1.  */
  33   for (i = 0; i < N - 1; i++)
  34     {
  35        p->a[x + i + 1] = p->a[x + i];
  36     }
  37
  38   /* check results: */
  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   foo = 0;
  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" } } */
  57 /* { dg-final { cleanup-tree-dump "vect" } } */
  58