gcc/testsuite/gcc.dg/vect/pr67790.c

   1 /* { dg-require-effective-target vect_int } */
   2
   3 #include "tree-vect.h"
   4
   5 struct {
   6     int x_advance;
   7     int y_advance;
   8 } a[256];
   9
  10 int b, c;
  11
  12 void __attribute__((noinline,noclone)) fn1()
  13 {
  14   for (int i = 0; i < 256; i++)
  15     {
  16       c -= a[i].x_advance;
  17       b -= a[i].y_advance;
  18     }
  19 }
  20
  21 int main()
  22 {
  23   check_vect ();
  24
  25   for (int i = 0; i < 256; ++i)
  26     {
  27       a[i].x_advance = i;
  28       a[i].y_advance = -i + 3;
  29       __asm__ volatile ("" : : : "memory");
  30     }
  31
  32   fn1();
  33
  34   if (c != -32640 || b != 31872)
  35     abort ();
  36
  37   return 0;
  38 }
  39
  40 /* { dg-final { scan-tree-dump "vectorizing stmts using SLP" "vect" } } */