gcc/testsuite/gcc.dg/vect/vect-117.c

   1 /* { dg-require-effective-target vect_int } */
   2
   3 #include <stdarg.h>
   4 #include "tree-vect.h"
   5
   6 #define N 5
   7
   8 static  int a[N][N] = {{ 1, 2, 3, 4, 5},
   9                        { 6, 7, 8, 9,10},
  10                        {11,12,13,14,15},
  11                        {16,17,18,19,20},
  12                        {21,22,23,24,25}};
  13
  14 static  int c[N][N] = {{ 1, 2, 3, 4, 5},
  15                        { 7, 9,11, 13,15},
  16                        {18,21,24,27,30},
  17                        {34,38,42,46,50},
  18                        {55,60,65,70,75}};
  19
  20 __attribute__ ((noinline))
  21 int main1 (int A[N][N], int n)
  22 {
  23
  24   int i,j;
  25
  26   /* vectorizable */
  27   for (i = 1; i < N; i++)
  28   {
  29     for (j = 0; j < n; j++)
  30     {
  31       A[i][j] = A[i-1][j] + A[i][j];
  32     }
  33   }
  34
  35   return 0;
  36 }
  37
  38 int main (void)
  39 {
  40   int i,j;
  41
  42   check_vect ();
  43
  44   main1 (a, N);
  45
  46   /* check results: */
  47
  48   for (i = 0; i < N; i++)
  49    {
  50     for (j = 0; j < N; j++)
  51      {
  52        if (a[i][j] != c[i][j])
  53          abort();
  54      }
  55   }
  56   return 0;
  57 }
  58
  59 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */
  60 /* { dg-final { scan-tree-dump-times "possible dependence between data-refs" 0 "vect" } } */
  61