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

   1 /* { dg-do compile } */
   2 /* { dg-additional-options "-fdump-tree-optimized-details-blocks" } */
   3 /* { dg-require-effective-target vect_int } */
   4
   5 extern void abort (void);
   6
   7 #define N 128
   8
   9 short a[N];
  10 short d[N];
  11
  12 int foo ()
  13 {
  14   int i;
  15   short b[N];
  16   short c[N];
  17   for (i = 0; i < N/2; i++)
  18     {
  19       b[i] = i*3;
  20       c[i] = i;
  21       asm volatile ("" ::: "memory");
  22     }
  23
  24   /* Strided access pattern.  */
  25   for (i = 0; i < N/2; i++)
  26     {
  27       a[i] = b[2*i+1] * c[2*i+1] - b[2*i] * c[2*i];
  28       d[i] = b[2*i] * c[2*i+1] + b[2*i+1] * c[2*i];
  29     }
  30
  31   return 0;
  32 }
  33
  34 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { xfail { ! vect_strided2 } } } } */
  35 /* { dg-final { scan-tree-dump-not "Invalid sum" "optimized" } } */