gcc/testsuite/gcc.dg/vect/pr65947-14.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_condition } */
   4
   5 #include "tree-vect.h"
   6
   7 extern void abort (void) __attribute__ ((noreturn));
   8
   9 #define N 27
  10
  11 /* Condition reduction with matches only in even lanes at runtime.  */
  12
  13 int
  14 condition_reduction (int *a, int min_v)
  15 {
  16   int last = N + 96;
  17
  18   for (int i = 0; i < N; i++)
  19     if (a[i] > min_v)
  20       last = i;
  21
  22   return last;
  23 }
  24
  25 int
  26 main (void)
  27 {
  28   int a[N] = {
  29   47, 12, 13, 14, 15, 16, 17, 18, 19, 20,
  30   1, 2, 3, 4, 5, 6, 7, 8, 9, 10,
  31   21, 22, 23, 24, 25, 26, 27
  32   };
  33
  34   check_vect ();
  35
  36   int ret = condition_reduction (a, 46);
  37
  38   /* loop should have found a value of 0, not default N + 96.  */
  39   if (ret != 0)
  40     abort ();
  41
  42   return 0;
  43 }
  44
  45 /* { dg-final { scan-tree-dump-times "LOOP VECTORIZED" 2 "vect" } } */
  46 /* { dg-final { scan-tree-dump-times "optimizing condition reduction with FOLD_EXTRACT_LAST" 2 "vect" { target vect_fold_extract_last } } } */
  47 /* { dg-final { scan-tree-dump-times "condition expression based on integer induction." 2 "vect" { target { ! vect_fold_extract_last } } } } */