gcc/testsuite/gcc.dg/vect/O3-slp-reduc-10.c

   1 /* { dg-require-effective-target vect_int } */
   2
   3 #include <stdarg.h>
   4 #include "tree-vect.h"
   5
   6 #define N 128
   7 #define TYPE int
   8 #define RESULT 755918
   9
  10 __attribute__ ((noinline)) TYPE fun2 (TYPE *x, TYPE *y, unsigned int n)
  11 {
  12   int i, j;
  13   TYPE dot = 14;
  14
  15   for (i = 0; i < n / 2; i++)
  16     for (j = 0; j < 2; j++)
  17       dot += *(x++) * *(y++);
  18
  19   return dot;
  20 }
  21
  22 int main (void)
  23 {
  24   TYPE a[N], b[N], dot;
  25   int i;
  26
  27   check_vect ();
  28
  29   for (i = 0; i < N; i++)
  30     {
  31       a[i] = i;
  32       b[i] = i+8;
  33     }
  34
  35   dot = fun2 (a, b, N);
  36   if (dot != RESULT)
  37     abort();
  38
  39   return 0;
  40 }
  41
  42 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 2 "vect" { target { vect_int_mult && {! vect_no_align } } } } } */