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

   1 /* { dg-require-effective-target vect_condition } */
   2
   3 #include <stdlib.h>
   4 #include "tree-vect.h"
   5
   6 #define N 16
   7
   8 int c[N] = {3,2,1,10,1,42,3,4,50,9,32,8,11,10,1,2};
   9 int a[N+1] = {0,16,32,48,64,128,256,512,0,16,32,48,64,128,256,512,1024};
  10
  11 __attribute__ ((noinline)) void
  12 foo (int *x)
  13 {
  14   int i;
  15   int curr_a, flag, next_a;
  16
  17   curr_a = a[0];
  18
  19   for (i = 0; i < N; i++)
  20     {
  21       flag = *x > c[i];
  22       next_a = a[i+1];
  23       curr_a = flag ? curr_a : next_a;
  24     }
  25
  26   *x = curr_a;
  27 }
  28
  29 int main (void)
  30 {
  31   int x = 7;
  32
  33   check_vect ();
  34
  35   foo (&x);
  36
  37   if (x != 256)
  38     abort ();
  39
  40   return 0;
  41 }
  42
  43 /* The order of computation should not be changed for cond_expr, therefore,
  44    it cannot be vectorized in reduction.  */
  45 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { xfail *-*-* } } } */
  46 /* { dg-final { cleanup-tree-dump "vect" } } */
  47
  48