gcc/testsuite/gcc.dg/vect/vect-114.c

   1 /* { dg-require-effective-target vect_float } */
   2
   3 #include <stdarg.h>
   4 #include "tree-vect.h"
   5
   6 #define N 16
   7
   8 __attribute__ ((noinline)) int
   9 main1 (void)
  10 {
  11   int i;
  12   float a[N];
  13   float b[N] = {0,3,6,9,12,15,18,21,24,27,30,33,36,39,42,45};
  14
  15   /* Reverse access and forward access.  */
  16   for (i = N; i > 0; i--)
  17     {
  18       a[N-i] = b[i-1];
  19     }
  20
  21   /* Check results.  */
  22   for (i = 0; i <N; i++)
  23     {
  24       if (a[i] != b[N-1-i])
  25         abort ();
  26     }
  27
  28   return 0;
  29 }
  30
  31 int main (void)
  32 {
  33   check_vect ();
  34   return main1 ();
  35 }
  36
  37 /* Requires reverse for SVE, which is implemented by a later patch.
  38    Until then we fall back to Advanced SIMD and successfully vectorize
  39    the loop.  */
  40 /* { dg-final { scan-tree-dump-times "vectorized 0 loops" 1 "vect" { target { ! vect_perm } xfail { aarch64_sve && vect_variable_length } } } } */
  41 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target vect_perm } } } */
  42