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

   1 /* { dg-require-effective-target vect_int_mult } */
   2
   3 #include <stdarg.h>
   4 #include "tree-vect.h"
   5
   6 #define K 4
   7
   8 int in[2*K][K] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
   9 int out[K];
  10 int check_result[K] = {0,16,256,4096};
  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 #pragma GCC unroll 0
  23         for (i = 0; i < K; i++)
  24           sum *= in[i+k][j];
  25       out[k] = sum;
  26     }
  27 }
  28
  29 int main ()
  30 {
  31   int i, j, k;
  32
  33   check_vect ();
  34
  35   for (i = 0; i < 2*K; i++)
  36     for (j = 0; j < K; j++)
  37       in[i][j] = (i+2)/3;
  38
  39   foo();
  40
  41 #pragma GCC novector
  42   for (k = 0; k < K; k++)
  43     if (out[k] != check_result[k])
  44       abort ();
  45
  46   return 0;
  47 }
  48
  49 /* { dg-final { scan-tree-dump-times "OUTER LOOP VECTORIZED" 1 "vect" } } */
  50