gcc/testsuite/gcc.dg/vect/vect-10-big-array.c

   1 /* { dg-do compile } */
   2 /* { dg-require-effective-target vect_int } */
   3
   4 extern void abort (void);
   5
   6 #define N 128
   7
   8 short a[N];
   9 short d[N];
  10
  11 int foo ()
  12 {
  13   int i;
  14   short b[N];
  15   short c[N];
  16   for (i = 0; i < N/2; i++)
  17     {
  18       b[i] = i*3;
  19       c[i] = i;
  20       asm volatile ("" ::: "memory");
  21     }
  22
  23   /* Strided access pattern.  */
  24   for (i = 0; i < N/2; i++)
  25     {
  26       a[i] = b[2*i+1] * c[2*i+1] - b[2*i] * c[2*i];
  27       d[i] = b[2*i] * c[2*i+1] + b[2*i+1] * c[2*i];
  28     }
  29
  30   return 0;
  31 }
  32
  33 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { xfail { ! vect_strided2 } } } } */