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

   1 /* { dg-require-effective-target vect_int } */
   2
   3 #include <stdarg.h>
   4 #include "tree-vect.h"
   5
   6 #define N 128
   7 unsigned char udata_ch[N];
   8 #define SUM N*(N-1)
   9
  10 __attribute__ ((noinline)) int
  11 foo ()
  12 {
  13   int i;
  14   unsigned int intsum = 0;
  15
  16   for (i = 0; i < N; i++)
  17     {
  18       udata_ch[i] = i*2;
  19       asm volatile ("" ::: "memory");
  20     }
  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-times "vect_recog_widen_sum_pattern: detected" 1 "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 } } } } } */