gcc/testsuite/gcc.dg/vect/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 int
  12 foo ()
  13 {
  14   int i;
  15   signed short shortsum = 0;
  16
  17   /* widenning sum: sum chars into short.
  18      The widening-summation pattern is currently not detected because of this
  19      patch:
  20
  21      2005-12-26  Kazu Hirata  <kazu@codesourcery.com>
  22
  23         PR tree-optimization/25125
  24    */
  25
  26   for (i = 0; i < N; i++)
  27     {
  28       shortsum += data_ch[i];
  29     }
  30
  31   /* check results:  */
  32   if (shortsum != SUM)
  33     abort ();
  34
  35   return 0;
  36 }
  37
  38 int
  39 main (void)
  40 {
  41   check_vect ();
  42   return foo ();
  43 }
  44
  45 /* { dg-final { scan-tree-dump-times "vect_recog_widen_sum_pattern: detected" 1 "vect" { xfail *-*-* } } } */
  46 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { xfail *-*-* } } } */
  47 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 0 "vect" { target { ! vect_widen_sum_qi_to_hi } } } } */
  48 /* { dg-final { cleanup-tree-dump "vect" } } */