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

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