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