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

   1 /* { dg-require-effective-target vect_int } */
   2
   3 #include <stdarg.h>
   4 #include "tree-vect.h"
   5
   6 #define N 200
   7
   8 void __attribute__((noinline))
   9 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       __asm__ volatile ("");
  37     }
  38
  39   for (i = 0; i < N / 3; i++)
  40     {
  41       check_results[3*i] = 9 * i + 6;
  42       check_results[3*i+1] = 9 * i + 15;
  43       check_results[3*i+2] = 9 * i + 4;
  44       __asm__ volatile ("" : : : "memory");
  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" 1 "vect" { target { vect_perm_byte } } } } */
  57 /* { dg-final { scan-tree-dump-times "vectorizing stmts using SLP" 1 "vect" { target { vect_perm_byte && {! vect_load_lanes } } } } } */
  58 /* { dg-final { scan-tree-dump-times "vectorizing stmts using SLP" 0 "vect" { target vect_load_lanes } } } */
  59 /* { dg-final { scan-tree-dump "note: Built SLP cancelled: can use load/store-lanes" "vect" { target { vect_perm_byte && vect_load_lanes } } } } */
  60 /* { dg-final { scan-tree-dump "LOAD_LANES" "vect" { target vect_load_lanes } } } */
  61 /* { dg-final { scan-tree-dump "STORE_LANES" "vect" { target vect_load_lanes } } } */