gcc/testsuite/gcc.dg/vect/vect-outer-slp-3.c

   1 /* { dg-require-effective-target vect_double } */
   2 /* { dg-require-effective-target vect_intdouble_cvt } */
   3
   4 #include "tree-vect.h"
   5
   6 double image[40];
   7
   8 void __attribute__((noipa))
   9 foo (void)
  10 {
  11   for (int i = 0; i < 20; i++)
  12     {
  13       double suma = 0;
  14       double sumb = 0;
  15       int k = image[2*i];
  16       int l = image[2*i+1];
  17       for (int j = 0; j < 40; j++)
  18         {
  19           suma += k+i;
  20           sumb += l+i;
  21           k++;
  22           l++;
  23         }
  24       image[2*i] = suma;
  25       image[2*i+1] = sumb;
  26     }
  27 }
  28
  29 int main ()
  30 {
  31   check_vect ();
  32
  33   for (int i = 0; i < 40; ++i)
  34     image[i] = 1.;
  35
  36   foo ();
  37
  38   for (int i = 0; i < 20; i++)
  39     {
  40       double suma = 0;
  41       double sumb = 0;
  42       int k = 1;
  43       int l = 1;
  44       for (int j = 0; j < 40; j++)
  45         {
  46           suma += k+i;
  47           sumb += l+i;
  48           asm ("" : "+g" (suma));
  49           asm ("" : "+g" (sumb));
  50           k++;
  51           l++;
  52         }
  53       if (image[2*i] != suma
  54           || image[2*i+1] != sumb)
  55         abort ();
  56     }
  57
  58   return 0;
  59 }
  60
  61 /* { dg-final { scan-tree-dump-times "OUTER LOOP VECTORIZED" 1 "vect" } } */
  62 /* { dg-final { scan-tree-dump-times "vectorizing stmts using SLP" 1 "vect" } } */