void
tree_ssa_unswitch_loops (struct loops *loops)
{
int i, num;
struct loop *loop;
bool changed = false;
/* Go through inner loops (only original ones). */
num = loops->num;
for (i = 1; i < num; i++)
{
/* Removed loop? */
loop = loops->parray[i];
if (!loop)
continue;
if (loop->inner)
continue;
changed |= tree_unswitch_single_loop (loops, loop, 0);
}
if (changed)
cleanup_tree_cfg_loop ();
}
unsigned int
tree_ssa_unswitch_loops (void)
{
loop_iterator li;
struct loop *loop;
bool changed = false;
/* Go through inner loops (only original ones). */
FOR_EACH_LOOP (li, loop, LI_ONLY_INNERMOST)
{
changed |= tree_unswitch_single_loop (loop, 0);
}
unsigned int
tree_ssa_unswitch_loops (void)
{
loop_iterator li;
struct loop *loop;
bool changed = false;
HOST_WIDE_INT iterations;
/* Go through inner loops (only original ones). */
FOR_EACH_LOOP (li, loop, LI_ONLY_INNERMOST)
{
if (dump_file && (dump_flags & TDF_DETAILS))
fprintf (dump_file, ";; Considering loop %d\n", loop->num);
/* Do not unswitch in cold regions. */
if (optimize_loop_for_size_p (loop))
{
if (dump_file && (dump_flags & TDF_DETAILS))
fprintf (dump_file, ";; Not unswitching cold loops\n");
continue;
}
/* The loop should not be too large, to limit code growth. */
if (tree_num_loop_insns (loop, &eni_size_weights)
> (unsigned) PARAM_VALUE (PARAM_MAX_UNSWITCH_INSNS))
{
if (dump_file && (dump_flags & TDF_DETAILS))
fprintf (dump_file, ";; Not unswitching, loop too big\n");
continue;
}
/* If the loop is not expected to iterate, there is no need
for unswitching. */
iterations = estimated_loop_iterations_int (loop);
if (iterations >= 0 && iterations <= 1)
{
if (dump_file && (dump_flags & TDF_DETAILS))
fprintf (dump_file, ";; Not unswitching, loop is not expected to iterate\n");
continue;
}
changed |= tree_unswitch_single_loop (loop, 0);
}
if (changed)
return TODO_cleanup_cfg;
return 0;
}
unsigned int
tree_ssa_unswitch_loops (void)
{
struct loop *loop;
bool changed = false;
/* Go through all loops starting from innermost. */
FOR_EACH_LOOP (loop, LI_FROM_INNERMOST)
{
if (!loop->inner)
/* Unswitch innermost loop. */
changed |= tree_unswitch_single_loop (loop, 0);
else
changed |= tree_unswitch_outer_loop (loop);
}
if (changed)
return TODO_cleanup_cfg;
return 0;
}