gcc/testsuite/gcc.dg/vect/slp-perm-11.c

   1 /* { dg-require-effective-target vect_int } */
   2
   3 #include "tree-vect.h"
   4
   5 int a[64];
   6 int b[128];
   7
   8 void __attribute__((noinline, noclone))
   9 foo (int s)
  10 {
  11   int i;
  12   for (i = 0; i < 32; ++i)
  13     {
  14       a[2*i] = b[i*s+1];
  15       a[2*i+1] = b[i*s];
  16     }
  17 }
  18
  19 int main ()
  20 {
  21   int i;
  22   check_vect ();
  23   for (i = 0; i < 128; ++i)
  24     {
  25       b[i] = i;
  26       __asm__ volatile ("");
  27     }
  28   foo (4);
  29   for (i = 0; i < 64; ++i)
  30     if (a[i] != (4*(i/2) + (i & 1) ^ 1))
  31       abort ();
  32   return 0;
  33 }
  34
  35 /* { dg-final { scan-tree-dump-times "vectorizing stmts using SLP" 1 "vect" { target vect_perm } } } */