gcc/testsuite/gcc.dg/vect/pr65947-1.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 32
   8
   9 /* Simple condition reduction.  */
  10
  11 int
  12 condition_reduction (int *a, int min_v)
  13 {
  14   int last = 66; /* High start value.  */
  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   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
  33   check_vect ();
  34
  35   int ret = condition_reduction (a, 1);
  36
  37   if (ret != 17)
  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 } } } } */