gcc/testsuite/gcc.dg/vect/vect-98-big-array.c

   1 /* { dg-require-effective-target vect_int } */
   2
   3 #include <stdarg.h>
   4 #include "tree-vect.h"
   5
   6 #define N 16
   7 #define DOT16( a, b)   ( a[0]*b[0]   + a[1]*b[1]   + a[2]*b[2]   + a[3]*b[3] + \
   8                          a[4]*b[4]   + a[5]*b[5]   + a[6]*b[6]   + a[7]*b[7] + \
   9                          a[8]*b[8]   + a[9]*b[9]   + a[10]*b[10] + a[11]*b[11] + \
  10                          a[12]*b[12] + a[13]*b[13] + a[14]*b[14] + a[15]*b[15])
  11
  12 __attribute__ ((noinline))
  13 int main1 (int ia[][N])
  14 {
  15   int i, j;
  16   int ib[N] = {0,3,6,9};
  17   int ic[N][N];
  18
  19   for (i = 0; i < N; i++)
  20     {
  21         ic[0][i] = DOT16 (ia[i], ib);
  22     }
  23
  24   /* check results: */
  25   for (i = 0; i < N; i++)
  26     {
  27        if (ic[0][i] != DOT16 (ia[i], ib))
  28            abort ();
  29     }
  30
  31   return 0;
  32 }
  33
  34 int main (void)
  35 {
  36   int ia[N][N];
  37   int i,j;
  38   for (i = 0; i < N; i++)
  39     for (j = 0; j < N; j++)
  40       {
  41         ia[i][j] = i + j + 1;
  42         asm volatile ("" ::: "memory");
  43       }
  44
  45   check_vect ();
  46
  47   return main1 (ia);
  48 }
  49
  50 /* Needs interleaving support.  */
  51 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target vect_strided4 } } } */
  52 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 0 "vect" { xfail  vect_strided4 } } } */