gcc/testsuite/gcc.dg/vect/slp-reduc-7.c

   1 /* { dg-require-effective-target vect_int } */
   2 /* { dg-require-effective-target vect_perm } */
   3
   4 #include <stdarg.h>
   5 #include "tree-vect.h"
   6
   7 #define N 32
   8
   9 unsigned int ub[N] = {0,3,6,9,12,15,18,21,24,27,30,33,36,39,42,45,
  10     0,3,6,9,12,15,18,21,24,27,30,33,36,39,42,45};
  11 unsigned int uc[N] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,
  12     0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15};
  13
  14 /* Vectorization of reduction using loop-aware SLP (with two copies).  */
  15
  16 __attribute__ ((noinline))
  17 int main1 (int n, int res0, int res1, int res2, int res3,
  18            int res4, int res5, int res6, int res7)
  19 {
  20   int i;
  21   unsigned int udiff0 = 5, udiff1 = 10, udiff2 = 20, udiff3 = 30;
  22   unsigned int udiff4 = 45, udiff5 = 50, udiff6 = 60, udiff7 = 70;
  23
  24   for (i = 0; i < n; i++) {
  25     udiff7 += (ub[8*i + 7] - uc[8*i + 7]);
  26     udiff6 += (ub[8*i + 6] - uc[8*i + 6]);
  27     udiff5 += (ub[8*i + 5] - uc[8*i + 5]);
  28     udiff4 += (ub[8*i + 4] - uc[8*i + 4]);
  29     udiff3 += (ub[8*i + 3] - uc[8*i + 3]);
  30     udiff2 += (ub[8*i + 2] - uc[8*i + 2]);
  31     udiff1 += (ub[8*i + 1] - uc[8*i + 1]);
  32     udiff0 += (ub[8*i] - uc[8*i]);
  33   }
  34
  35   /* Check results:  */
  36   if (udiff0 != res0
  37       || udiff1 != res1
  38       || udiff2 != res2
  39       || udiff3 != res3
  40       || udiff4 != res4
  41       || udiff5 != res5
  42       || udiff6 != res6
  43       || udiff7 != res7)
  44     abort ();
  45
  46   return 0;
  47 }
  48
  49 int main (void)
  50 {
  51   check_vect ();
  52
  53   main1 (N/8, 37, 50, 68, 86, 109, 122, 140, 158);
  54   main1 (N/8 - 1, 21, 32, 48, 64, 85, 96, 112, 128);
  55   return 0;
  56 }
  57
  58 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { xfail vect_no_int_add } } } */
  59 /* For variable-length SVE, the number of scalar statements in the
  60    reduction exceeds the number of elements in a 128-bit granule.  */
  61 /* { dg-final { scan-tree-dump-times "vectorizing stmts using SLP" 1 "vect" { xfail { vect_no_int_add || { { aarch64_sve && vect_variable_length } || { riscv_v && vect_variable_length } } } } } } */
  62 /* { dg-final { scan-tree-dump-times "VEC_PERM_EXPR" 0 "vect" { xfail { aarch64_sve && vect_variable_length } } } } */