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

   1 /* { dg-require-effective-target vect_int } */
   2
   3 #include <stdarg.h>
   4 #include "tree-vect.h"
   5
   6 #if VECTOR_BITS > 128
   7 #define N (VECTOR_BITS * 2 / 16)
   8 #else
   9 #define N 16
  10 #endif
  11
  12 unsigned char udata_ch[N] =
  13   { 0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28 };
  14 #define SUM 210
  15
  16 __attribute__ ((noinline)) int
  17 foo ()
  18 {
  19   int i;
  20   unsigned int intsum = 0;
  21
  22   /* widenning sum: sum chars into int.  */
  23   for (i = 0; i < N; i++)
  24     {
  25       intsum += udata_ch[i];
  26     }
  27
  28   /* check results:  */
  29   if (intsum != SUM)
  30     abort ();
  31
  32   return 0;
  33 }
  34
  35 int
  36 main (void)
  37 {
  38   check_vect ();
  39   return foo ();
  40 }
  41
  42 /* { dg-final { scan-tree-dump "vect_recog_widen_sum_pattern: detected" "vect"} } */
  43 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target { vect_widen_sum_qi_to_si || vect_unpack } } } } */
  44 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 0 "vect" { target { { ! vect_widen_sum_qi_to_si } && { ! vect_unpack } } } } } */