gcc/testsuite/gcc.dg/vect/pr65947-12.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 where the result is a negative of the induction.
  10    Will fail to vectorize to a simple case.  */
  11
  12 signed int
  13 condition_reduction (signed int *a, signed int min_v)
  14 {
  15   signed int last = -1;
  16
  17   for (signed int i = 0; i < N; i++)
  18     if (a[i] < min_v)
  19       last = -i;
  20
  21   return last;
  22 }
  23
  24 int
  25 main (void)
  26 {
  27   signed int a[N] = {
  28   11, -12, 13, 14, 15, 16, 17, 18, 19, 20,
  29   1, 2, -3, 4, 5, 6, 7, -8, 9, 10,
  30   21, 22, 23, 24, 25, 26, 27, 28, 29, 30,
  31   31, 32
  32   };
  33
  34   check_vect ();
  35
  36   signed int ret = condition_reduction (a, 16);
  37
  38   if (ret != -19)
  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-not "condition expression based on integer induction." "vect" } } */