gcc/testsuite/gcc.dg/vect/slp-perm-8.c

   1 /* { dg-require-effective-target vect_int } */
   2
   3 #include <stdarg.h>
   4 #include <stdio.h>
   5 #include "tree-vect.h"
   6
   7 #define N 200
   8
   9 void foo (unsigned char *__restrict__ pInput, unsigned char *__restrict__ pOutput)
  10 {
  11   unsigned char i, a, b, c;
  12
  13   for (i = 0; i < N / 3; i++)
  14     {
  15        a = *pInput++;
  16        b = *pInput++;
  17        c = *pInput++;
  18
  19        *pOutput++ = a + b + c + 3;
  20        *pOutput++ = a + b + c + 12;
  21        *pOutput++ = a + b + c + 1;
  22     }
  23 }
  24
  25 int main (int argc, const char* argv[])
  26 {
  27   unsigned char input[N], output[N], i;
  28   unsigned char check_results[N];
  29
  30   check_vect ();
  31
  32   for (i = 0; i < N; i++)
  33     {
  34       input[i] = i;
  35       output[i] = 0;
  36       if (input[i] > 256)
  37         abort ();
  38     }
  39
  40   for (i = 0; i < N / 3; i++)
  41     {
  42       check_results[3*i] = 9 * i + 6;
  43       check_results[3*i+1] = 9 * i + 15;
  44       check_results[3*i+2] = 9 * i + 4;
  45     }
  46
  47   foo (input, output);
  48
  49   for (i = 0; i < N - (N % 3); i++)
  50      if (output[i] != check_results[i])
  51        abort ();
  52
  53   return 0;
  54 }
  55
  56 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 2 "vect" { target vect_perm } } } */
  57 /* { dg-final { scan-tree-dump-times "vectorizing stmts using SLP" 1 "vect" { target vect_perm } } } */
  58 /* { dg-final { cleanup-tree-dump "vect" } } */
  59