gcc/testsuite/gcc.dg/vect/pr81410.c

   1 /* { dg-require-effective-target vect_long_long } */
   2
   3 #include "tree-vect.h"
   4
   5 long long x[24];
   6 long long y[16];
   7 long long z[8];
   8
   9 void __attribute__((noinline)) foo()
  10 {
  11   for (int i = 0; i < 8; ++i)
  12     {
  13       y[2*i] = x[3*i];
  14       y[2*i + 1] = x[3*i + 1];
  15       z[i] = 1;
  16     }
  17 }
  18
  19 int main()
  20 {
  21   check_vect ();
  22
  23   for (int i = 0; i < 24; ++i)
  24     {
  25       x[i] = i;
  26       __asm__ volatile ("" : : : "memory");
  27     }
  28   foo ();
  29 #pragma GCC novector
  30   for (int i = 0; i < 8; ++i)
  31     if (y[2*i] != 3*i || y[2*i+1] != 3*i + 1)
  32       __builtin_abort ();
  33
  34   return 0;
  35 }
  36
  37 /* { dg-final { scan-tree-dump "vectorized 1 loops" "vect" } } */