gcc/testsuite/gcc.dg/vect/vect-outer-slp-2.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       for (int j = 0; j < 40; j++)
  16         {
  17           suma += j+i;
  18           sumb += j+i;
  19         }
  20       image[2*i] = suma;
  21       image[2*i+1] = sumb;
  22     }
  23 }
  24
  25 int main ()
  26 {
  27   check_vect ();
  28
  29   foo ();
  30
  31 #pragma GCC novector
  32   for (int i = 0; i < 20; i++)
  33     {
  34       double suma = 0;
  35       double sumb = 0;
  36       for (int j = 0; j < 40; j++)
  37         {
  38           suma += j+i;
  39           sumb += j+i;
  40           asm ("" : "+g" (suma));
  41           asm ("" : "+g" (sumb));
  42         }
  43       if (image[2*i] != suma
  44           || image[2*i+1] != sumb)
  45         abort ();
  46     }
  47
  48   return 0;
  49 }
  50
  51 /* { dg-final { scan-tree-dump-times "OUTER LOOP VECTORIZED" 1 "vect" } } */
  52 /* We don't yet support SLP inductions for variable length vectors.  */
  53 /* { dg-final { scan-tree-dump-times "vectorizing stmts using SLP" 1 "vect" { xfail vect_variable_length } } } */