gcc/testsuite/gcc.dg/vect/pr65947-2.c

   1 /* { dg-require-effective-target vect_condition } */
   2
   3 #include "tree-vect.h"
   4
   5 extern void abort (void) __attribute__ ((noreturn));
   6
   7 #define N 254
   8
   9 /* Non-simple condition reduction.  */
  10
  11 unsigned char
  12 condition_reduction (unsigned char *a, unsigned char min_v)
  13 {
  14   unsigned char last = 65;
  15
  16   for (unsigned char i = 0; i < N; i++)
  17     if (a[i] < min_v)
  18       last = a[i];
  19
  20   return last;
  21 }
  22
  23 int
  24 main (void)
  25 {
  26   unsigned char a[N] = {
  27   11, 12, 13, 14, 15, 16, 17, 18, 19, 20,
  28   1, 2, 3, 4, 5, 6, 7, 8, 9, 10,
  29   21, 22, 23, 24, 25, 26, 27, 28, 29, 30,
  30   31, 32
  31   };
  32   __builtin_memset (a+32, 43, N-32);
  33
  34   check_vect ();
  35
  36   unsigned char ret = condition_reduction (a, 16);
  37
  38   if (ret != 10)
  39     abort ();
  40
  41   return 0;
  42 }
  43
  44 /* { dg-final { scan-tree-dump-times "LOOP VECTORIZED" 2 "vect" } } */
  45 /* { dg-final { scan-tree-dump-times "optimizing condition reduction with FOLD_EXTRACT_LAST" 2 "vect" { target vect_fold_extract_last } } } */
  46 /* { dg-final { scan-tree-dump-not "condition expression based on integer induction." "vect" } } */