gcc/testsuite/gcc.dg/vect/vect-reduc-pattern-2b-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 signed char data_ch[N];
   8
   9 volatile int y = 0;
  10
  11 __attribute__ ((noinline)) int
  12 foo ()
  13 {
  14   int i;
  15   signed int intsum = 0;
  16   signed int check_intsum = 0;
  17
  18   for (i = 0; i < N; i++)
  19     {
  20       data_ch[i] = i*2;
  21       check_intsum += data_ch[i];
  22       /* Avoid vectorization.  */
  23       if (y)
  24         abort ();
  25     }
  26
  27   /* widenning sum: sum chars into int.  */
  28   for (i = 0; i < N; i++)
  29     {
  30       intsum += data_ch[i];
  31     }
  32
  33   /* check results:  */
  34   if (intsum != check_intsum)
  35     abort ();
  36
  37   return 0;
  38 }
  39
  40 int
  41 main (void)
  42 {
  43   check_vect ();
  44   return foo ();
  45 }
  46
  47 /* { dg-final { scan-tree-dump-times "vect_recog_widen_sum_pattern: detected" 1 "vect" } } */
  48 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target { vect_widen_sum_qi_to_si && vect_unpack } } } } */
  49 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 0 "vect" { target { { ! vect_widen_sum_qi_to_si } && { ! vect_unpack } } } } } */