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

   1 /* Disabling epilogues until we find a better way to deal with scans.  */
   2 /* { dg-additional-options "--param vect-epilogues-nomask=0" } */
   3 /* { dg-require-effective-target vect_int } */
   4
   5 #include <stdarg.h>
   6 #include "tree-vect.h"
   7
   8 #define N 128
   9 unsigned char udata_ch[N];
  10 #define SUM N*(N-1)
  11
  12 __attribute__ ((noinline)) int
  13 foo ()
  14 {
  15   int i;
  16   unsigned short shortsum = 0;
  17
  18   for (i = 0; i < N; i++)
  19     {
  20       udata_ch[i] = i*2;
  21       asm volatile ("" ::: "memory");
  22     }
  23
  24   /* widenning sum: sum chars into short.  */
  25   for (i = 0; i < N; i++)
  26     {
  27       shortsum += udata_ch[i];
  28     }
  29
  30   /* check results:  */
  31   if (shortsum != SUM)
  32     abort ();
  33
  34   return 0;
  35 }
  36
  37 int
  38 main (void)
  39 {
  40   check_vect ();
  41   return foo ();
  42 }
  43
  44 /* { dg-final { scan-tree-dump-times "vect_recog_widen_sum_pattern: detected(?:(?!Analysis failed).)*Analysis succeeded" 1 "vect" { target vect_widen_sum_qi_to_hi } } } */
  45 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target vect_widen_sum_qi_to_hi } } } */
  46 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 0 "vect" { target { ! vect_widen_sum_qi_to_hi } } } } */