gcc/testsuite/gcc.dg/vect/slp-perm-9.c

   1 /* { dg-require-effective-target vect_int } */
   2
   3 #include <stdarg.h>
   4 #include "tree-vect.h"
   5
   6 #if VECTOR_BITS > 512
   7 #define N (VECTOR_BITS * 6 / 16)
   8 #else
   9 #define N 200
  10 #endif
  11
  12 void __attribute__((noinline))
  13 foo (unsigned short *__restrict__ pInput, unsigned short *__restrict__ pOutput)
  14 {
  15   unsigned short i, a, b, c;
  16
  17   for (i = 0; i < N / 3; i++)
  18     {
  19        a = *pInput++;
  20        b = *pInput++;
  21        c = *pInput++;
  22
  23        *pOutput++ = a + b + c + 3;
  24        *pOutput++ = a + b + c + 12;
  25        *pOutput++ = a + b + c + 1;
  26     }
  27 }
  28
  29 int main (int argc, const char* argv[])
  30 {
  31   unsigned short input[N], output[N], i;
  32   unsigned short check_results[N];
  33
  34   check_vect ();
  35
  36   for (i = 0; i < N; i++)
  37     {
  38       input[i] = i;
  39       output[i] = 0;
  40       asm volatile ("" ::: "memory");
  41     }
  42
  43   for (i = 0; i < N / 3; i++)
  44     {
  45       check_results[3*i] = 9 * i + 6;
  46       check_results[3*i+1] = 9 * i + 15;
  47       check_results[3*i+2] = 9 * i + 4;
  48       __asm__ volatile ("" : : : "memory");
  49     }
  50
  51   foo (input, output);
  52
  53   for (i = 0; i < N - (N % 3); i++)
  54      if (output[i] != check_results[i])
  55        abort ();
  56
  57   return 0;
  58 }
  59
  60 /* { dg-final { scan-tree-dump-times "vectorized 0 loops" 2 "vect" { target { ! { vect_perm_short || vect_load_lanes } } } } } */
  61 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target { vect_perm_short || vect_load_lanes } } } } */
  62 /* { dg-final { scan-tree-dump-times "permutation requires at least three vectors" 1 "vect" { target { vect_perm_short && { ! vect_perm3_short } } } } } */
  63 /* { dg-final { scan-tree-dump-not "permutation requires at least three vectors" "vect" { target vect_perm3_short } } } */
  64 /* { dg-final { scan-tree-dump-times "vectorizing stmts using SLP" 0 "vect" { target { { ! vect_perm3_short } || vect_load_lanes } } } } */
  65 /* { dg-final { scan-tree-dump-times "vectorizing stmts using SLP" 1 "vect" { target { vect_perm3_short && { ! vect_load_lanes } } } } } */