gcc/testsuite/gcc.dg/vect/vect-reduc-mul_2.c

   1 /* { dg-require-effective-target vect_int_mult } */
   2 /* { dg-require-effective-target whole_vector_shift } */
   3
   4 /* Write a reduction loop to be reduced using vector shifts and folded.  */
   5
   6 #include "tree-vect.h"
   7
   8 extern void abort(void);
   9
  10 int
  11 main (unsigned char argc, char **argv)
  12 {
  13   unsigned char in[16];
  14   unsigned char i = 0;
  15   unsigned char sum = 1;
  16
  17   check_vect ();
  18
  19   for (i = 0; i < 16; i++)
  20     in[i] = i + i + 1;
  21
  22   for (i = 0; i < 16; i++)
  23     sum *= in[i];
  24
  25   if (sum != 33)
  26     {
  27       __builtin_printf("Failed %d\n", sum);
  28       abort();
  29     }
  30
  31   return 0;
  32 }
  33
  34 /* { dg-final { scan-tree-dump "Reduce using vector shifts" "vect" } } */
  35