gcc/testsuite/gcc.dg/vect/vect-reduc-pattern-1c.c

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