gcc/testsuite/gcc.dg/vect/vect-double-reduc-6-big-array.c

   1 /* { dg-require-effective-target vect_int_mult } */
   2
   3 #include <stdarg.h>
   4 #include "tree-vect.h"
   5
   6 #define K 16
   7
   8 int in[2*K][K] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
   9 int out[K];
  10 int check_result[K];
  11
  12 __attribute__ ((noinline)) void
  13 foo ()
  14 {
  15   int sum;
  16   int i, j, k;
  17
  18   for (k = 0; k < K; k++)
  19     {
  20       sum = 1;
  21       for (j = 0; j < K; j++)
  22         for (i = 0; i < K; i++)
  23         {
  24           sum *= in[i+k][j];
  25           asm volatile ("" ::: "memory");
  26         }
  27       check_result[k] = sum;
  28     }
  29
  30   for (k = 0; k < K; k++)
  31     {
  32       sum = 1;
  33       for (j = 0; j < K; j++)
  34         for (i = 0; i < K; i++)
  35           sum *= in[i+k][j];
  36       out[k] = sum;
  37     }
  38 }
  39
  40 int main ()
  41 {
  42   int i, j, k;
  43
  44   check_vect ();
  45
  46   for (i = 0; i < 2*K; i++)
  47     for (j = 0; j < K; j++)
  48       in[i][j] = (i+2)/3;
  49
  50   foo ();
  51
  52   for (k = 0; k < K; k++)
  53     if (out[k] != check_result[k])
  54       abort ();
  55
  56   return 0;
  57 }
  58
  59 /* { dg-final { scan-tree-dump-times "OUTER LOOP VECTORIZED" 1 "vect" } } */
  60