gcc/testsuite/gcc.dg/vect/slp-reduc-2.c

   1 /* { dg-require-effective-target vect_int } */
   2
   3 #include <stdarg.h>
   4 #include "tree-vect.h"
   5
   6 #define N 16
   7
   8 unsigned int ub[N] = {0,3,6,9,12,15,18,21,24,27,30,33,36,39,42,45};
   9 unsigned int uc[N] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15};
  10
  11 /* Vectorization of reduction using loop-aware SLP (with unrolling).  */
  12
  13 __attribute__ ((noinline))
  14 int main1 (int n, int res0, int res1, int res2, int res3)
  15 {
  16   int i;
  17   unsigned int udiff0 = 5, udiff1 = 10;
  18
  19   for (i = 0; i < n; i++) {
  20     udiff1 += (ub[2*i + 1] - uc[2*i + 1]);
  21     udiff0 += (ub[2*i] - uc[2*i]);
  22   }
  23
  24   /* Check results:  */
  25   if (udiff0 != res0
  26       || udiff1 != res1)
  27     abort ();
  28
  29   return 0;
  30 }
  31
  32 int main (void)
  33 {
  34   check_vect ();
  35
  36   main1 (N/2, 117, 138, 84, 102);
  37   return 0;
  38 }
  39
  40 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { xfail vect_no_int_add } } } */
  41 /* { dg-final { scan-tree-dump-times "vectorizing stmts using SLP" 1 "vect" { xfail vect_no_int_add } } } */
  42 /* { dg-final { cleanup-tree-dump "vect" } } */
  43