gcc/testsuite/gcc.dg/vect/slp-34-big-array.c

   1 /* { dg-require-effective-target vect_int } */
   2
   3 #include <stdarg.h>
   4 #include "tree-vect.h"
   5
   6 #define N 64
   7
   8 unsigned short in[N*8];
   9 unsigned short in2[N*8];
  10 volatile int y = 0;
  11
  12 int
  13 main1 ()
  14 {
  15   int i;
  16   unsigned short out[N*8];
  17   unsigned short out2[N*8];
  18
  19   for (i = 0; i < N*8; i++)
  20     {
  21       in[i] = in2[i] = i;
  22       if (y) /* Avoid vectorization.  */
  23         abort ();
  24     }
  25
  26   /* SLP with unrolling by 8.  */
  27   for (i = 0; i < N; i++)
  28     {
  29       out[i*3] = in[i*3] + 5;
  30       out[i*3 + 1] = in[i*3 + 1] + 6;
  31       out[i*3 + 2] = in[i*3 + 2] + 16;
  32
  33       out2[i*5] = in2[i*5] + 2;
  34       out2[i*5 + 1] = in2[i*5 + 1] + 2;
  35       out2[i*5 + 2] = in2[i*5 + 2] + 1;
  36       out2[i*5 + 3] = in2[i*5 + 3] + 3;
  37       out2[i*5 + 4] = in2[i*5 + 4] + 13;
  38     }
  39
  40   /* check results:  */
  41   for (i = 0; i < N; i++)
  42     {
  43       if (out[i*3] != in[i*3] + 5
  44           || out[i*3 + 1] != in[i*3 + 1] + 6
  45           || out[i*3 + 2] != in[i*3 + 2] + 16
  46           || out2[i*5] != in2[i*5] + 2
  47           || out2[i*5 + 1] != in2[i*5 + 1] + 2
  48           || out2[i*5 + 2] != in2[i*5 + 2] + 1
  49           || out2[i*5 + 3] != in2[i*5 + 3] + 3
  50           || out2[i*5 + 4] != in2[i*5 + 4] + 13)
  51         abort ();
  52     }
  53
  54   return 0;
  55 }
  56
  57 int main (void)
  58 {
  59   check_vect ();
  60
  61   main1 ();
  62
  63   return 0;
  64 }
  65
  66 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */
  67 /* { dg-final { scan-tree-dump-times "vectorizing stmts using SLP" 2 "vect"  } } */
  68 /* { dg-final { cleanup-tree-dump "vect" } } */
  69