gcc/testsuite/gcc.dg/tree-ssa/ldist-1a.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -ftree-loop-distribution -fdump-tree-ldist-all" } */
   3
   4 int foo (int * __restrict__ ia,
   5          int * __restrict__ ib,
   6          int * __restrict__ oxa,
   7          int * __restrict__ oxb)
   8 {
   9   int i;
  10   int oya[52], oyb[52];
  11
  12   for (i=0; i < 52; i++)
  13     {
  14       oya[i] = (ia[i] * oxa[i] + ib[i] * oxb[i]) >> 10;
  15       oyb[i] = (-ia[i] * oxb[i] + ib[i] * oxa[i]) >> 10;
  16     }
  17
  18   return oya[22] + oyb[21];
  19 }
  20
  21 /* { dg-final { scan-tree-dump-times "distributed: split to 2 loops" 0 "ldist" } } */