Re: Fusing two loops

["Sandeep Maram" <sandeep244 at gmail dot com>]

Hi Zdenek,

Thanks.

Sandeep.

On Thu, Apr 10, 2008 at 7:29 PM, Zdenek Dvorak <rakdver@kam.mff.cuni.cz> wrote:
> Hi,
>
>  > The error is rectified. The bug is in the function that calls fuse_loops().
>  > Now I am trying to transfer all the statements, using code -
>  >
>  > /* The following function fuses two loops.  */
>  >
>  > void
>  > fuse_loops (struct loop *loop_a, struct loop *loop_b)
>  > {
>  >   debug_loop (loop_a, 10);
>  >   debug_loop (loop_b, 10);
>  >   block_stmt_iterator bsi_a = bsi_start (loop_a->header);
>  >   block_stmt_iterator bsi_a_last = bsi_last (loop_a->header);
>  >   block_stmt_iterator bsi_b = bsi_last (loop_b->header);
>  >   while (&bsi_a != &bsi_a_last)
>  >     {
>  >       bsi_move_before (&bsi_a, &bsi_b);
>  >       fprintf (stderr, " transferred one statement from loop %d to
>  > loop %d ", loop_a->num, loop_b->num);
>  >       bsi_next (&bsi_a);
>  >     }
>
>  try
>
>
>  bsi_b = bsi_last (loop_b->header);
>
>  for (bsi_a = bsi_start (loop_a->header); !bsi_end_p (bsi_a); )
>   {
>     if (some condition)  /* you probably want to skip labels and cond_exprs */
>
>       bsi_move_before (&bsi_a, &bsi_b);
>     else
>       bsi_next (&bsi_a);
>   }
>
>  Zdenek
>