gcc/testsuite/gcc.dg/vect/pr65947-14.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 27
   8
   9 /* Condition reduction with matches only in even lanes at runtime.  */
  10
  11 int
  12 condition_reduction (int *a, int min_v)
  13 {
  14   int last = N + 96;
  15
  16   for (int i = 0; i < N; i++)
  17     if (a[i] > min_v)
  18       last = i;
  19
  20   return last;
  21 }
  22
  23 int
  24 main (void)
  25 {
  26   int a[N] = {
  27   47, 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
  30   };
  31
  32   check_vect ();
  33
  34   int ret = condition_reduction (a, 46);
  35
  36   /* loop should have found a value of 0, not default N + 96.  */
  37   if (ret != 0)
  38     abort ();
  39
  40   return 0;
  41 }
  42
  43 /* { dg-final { scan-tree-dump-times "LOOP VECTORIZED" 2 "vect" } } */
  44 /* { dg-final { scan-tree-dump-times "optimizing condition reduction with FOLD_EXTRACT_LAST" 4 "vect" { target vect_fold_extract_last } } } */
  45 /* { dg-final { scan-tree-dump-times "condition expression based on integer induction." 4 "vect" { target { ! vect_fold_extract_last } } } } */