gcc/testsuite/gcc.dg/vect/wrapv-vect-reduc-pattern-2c.c

   1 /* { dg-require-effective-target vect_int } */
   2
   3 #include <stdarg.h>
   4 #include "tree-vect.h"
   5
   6 #define N 16
   7 signed char data_ch[N] =
   8   { 0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28 };
   9 #define SUM 210
  10
  11 __attribute__ ((noinline)) int
  12 foo ()
  13 {
  14   int i;
  15   signed short shortsum = 0;
  16
  17   /* widenning sum: sum chars into short.  */
  18
  19   for (i = 0; i < N; i++)
  20     {
  21       shortsum += data_ch[i];
  22     }
  23
  24   /* check results:  */
  25   if (shortsum != SUM)
  26     abort ();
  27
  28   return 0;
  29 }
  30
  31 int
  32 main (void)
  33 {
  34   check_vect ();
  35   return foo ();
  36 }
  37
  38 /* { dg-final { scan-tree-dump "vect_recog_widen_sum_pattern: detected" "vect" } } */
  39 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target vect_widen_sum_qi_to_hi } } } */
  40 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 0 "vect" { target { ! vect_widen_sum_qi_to_hi } } } } */