Ejemplo n.º 1
0
/**
 * Configures the irreducible polynomial of the binary field.
 *
 * @param[in] f				- the new irreducible polynomial.
 */
static void fb_poly_set(const fb_t f) {
	fb_copy(core_get()->fb_poly, f);
#if FB_TRC == QUICK || !defined(STRIP)
	find_trace();
#endif
#if FB_SLV == QUICK || !defined(STRIP)
	find_solve();
#endif
#if FB_SRT == QUICK || !defined(STRIP)
	find_srz();
#endif
#if FB_INV == ITOHT || !defined(STRIP)
	find_chain();
#endif
}
Ejemplo n.º 2
0
/**
 * Configures the irreducible polynomial of the binary field.
 *
 * @param[in] f				- the new irreducible polynomial.
 */
static void fb_poly_set(fb_t f) {
	fb_copy(fb_poly, f);
#if FB_TRC == QUICK || !defined(STRIP)
	find_trace();
#endif
#if FB_SLV == QUICK || !defined(STRIP)
	find_solve();
#endif
#if FB_SRT == QUICK || !defined(STRIP)
	find_srz();
#endif
#if FB_INV == ITOHT || FB_INV == LOWER || !defined(STRIP)
	find_chain();
#endif

#ifdef WITH_PB
	/* Refresh configuration on pairing module. */
	pb_map_init();
#endif
}
Ejemplo n.º 3
0
static bool
tail_duplicate (void)
{
  fibnode_t *blocks = XCNEWVEC (fibnode_t, last_basic_block);
  basic_block *trace = XNEWVEC (basic_block, n_basic_blocks);
  int *counts = XNEWVEC (int, last_basic_block);
  int ninsns = 0, nduplicated = 0;
  gcov_type weighted_insns = 0, traced_insns = 0;
  fibheap_t heap = fibheap_new ();
  gcov_type cover_insns;
  int max_dup_insns;
  basic_block bb;
  bool changed = false;

  /* Create an oversized sbitmap to reduce the chance that we need to
     resize it.  */
  bb_seen = sbitmap_alloc (last_basic_block * 2);
  bitmap_clear (bb_seen);
  initialize_original_copy_tables ();

  if (profile_info && flag_branch_probabilities)
    probability_cutoff = PARAM_VALUE (TRACER_MIN_BRANCH_PROBABILITY_FEEDBACK);
  else
    probability_cutoff = PARAM_VALUE (TRACER_MIN_BRANCH_PROBABILITY);
  probability_cutoff = REG_BR_PROB_BASE / 100 * probability_cutoff;

  branch_ratio_cutoff =
    (REG_BR_PROB_BASE / 100 * PARAM_VALUE (TRACER_MIN_BRANCH_RATIO));

  FOR_EACH_BB (bb)
    {
      int n = count_insns (bb);
      if (!ignore_bb_p (bb))
	blocks[bb->index] = fibheap_insert (heap, -bb->frequency,
					    bb);

      counts [bb->index] = n;
      ninsns += n;
      weighted_insns += n * bb->frequency;
    }

  if (profile_info && flag_branch_probabilities)
    cover_insns = PARAM_VALUE (TRACER_DYNAMIC_COVERAGE_FEEDBACK);
  else
    cover_insns = PARAM_VALUE (TRACER_DYNAMIC_COVERAGE);
  cover_insns = (weighted_insns * cover_insns + 50) / 100;
  max_dup_insns = (ninsns * PARAM_VALUE (TRACER_MAX_CODE_GROWTH) + 50) / 100;

  while (traced_insns < cover_insns && nduplicated < max_dup_insns
         && !fibheap_empty (heap))
    {
      basic_block bb = (basic_block) fibheap_extract_min (heap);
      int n, pos;

      if (!bb)
	break;

      blocks[bb->index] = NULL;

      if (ignore_bb_p (bb))
	continue;
      gcc_assert (!bb_seen_p (bb));

      n = find_trace (bb, trace);

      bb = trace[0];
      traced_insns += bb->frequency * counts [bb->index];
      if (blocks[bb->index])
	{
	  fibheap_delete_node (heap, blocks[bb->index]);
	  blocks[bb->index] = NULL;
	}

      for (pos = 1; pos < n; pos++)
	{
	  basic_block bb2 = trace[pos];

	  if (blocks[bb2->index])
	    {
	      fibheap_delete_node (heap, blocks[bb2->index]);
	      blocks[bb2->index] = NULL;
	    }
	  traced_insns += bb2->frequency * counts [bb2->index];
	  if (EDGE_COUNT (bb2->preds) > 1
	      && can_duplicate_block_p (bb2)
	      /* We have the tendency to duplicate the loop header
	         of all do { } while loops.  Do not do that - it is
		 not profitable and it might create a loop with multiple
		 entries or at least rotate the loop.  */
	      && (!current_loops
		  || bb2->loop_father->header != bb2))
	    {
	      edge e;
	      basic_block copy;

	      nduplicated += counts [bb2->index];

	      e = find_edge (bb, bb2);

	      copy = duplicate_block (bb2, e, bb);
	      flush_pending_stmts (e);

	      add_phi_args_after_copy (&copy, 1, NULL);

	      /* Reconsider the original copy of block we've duplicated.
	         Removing the most common predecessor may make it to be
	         head.  */
	      blocks[bb2->index] =
		fibheap_insert (heap, -bb2->frequency, bb2);

	      if (dump_file)
		fprintf (dump_file, "Duplicated %i as %i [%i]\n",
			 bb2->index, copy->index, copy->frequency);

	      bb2 = copy;
	      changed = true;
	    }
	  mark_bb_seen (bb2);
	  bb = bb2;
	  /* In case the trace became infrequent, stop duplicating.  */
	  if (ignore_bb_p (bb))
	    break;
	}
      if (dump_file)
	fprintf (dump_file, " covered now %.1f\n\n",
		 traced_insns * 100.0 / weighted_insns);
    }
  if (dump_file)
    fprintf (dump_file, "Duplicated %i insns (%i%%)\n", nduplicated,
	     nduplicated * 100 / ninsns);

  free_original_copy_tables ();
  sbitmap_free (bb_seen);
  free (blocks);
  free (trace);
  free (counts);
  fibheap_delete (heap);

  return changed;
}
Ejemplo n.º 4
0
static void
tail_duplicate (void)
{
  fibnode_t *blocks = XCNEWVEC (fibnode_t, last_basic_block);
  basic_block *trace = XNEWVEC (basic_block, n_basic_blocks);
  int *counts = XNEWVEC (int, last_basic_block);
  int ninsns = 0, nduplicated = 0;
  gcov_type weighted_insns = 0, traced_insns = 0;
  fibheap_t heap = fibheap_new ();
  gcov_type cover_insns;
  int max_dup_insns;
  basic_block bb;

  if (profile_info && flag_branch_probabilities)
    probability_cutoff = PARAM_VALUE (TRACER_MIN_BRANCH_PROBABILITY_FEEDBACK);
  else
    probability_cutoff = PARAM_VALUE (TRACER_MIN_BRANCH_PROBABILITY);
  probability_cutoff = REG_BR_PROB_BASE / 100 * probability_cutoff;

  branch_ratio_cutoff =
    (REG_BR_PROB_BASE / 100 * PARAM_VALUE (TRACER_MIN_BRANCH_RATIO));

  FOR_EACH_BB (bb)
    {
      int n = count_insns (bb);
      if (!ignore_bb_p (bb))
	blocks[bb->index] = fibheap_insert (heap, -bb->frequency,
					    bb);

      counts [bb->index] = n;
      ninsns += n;
      weighted_insns += n * bb->frequency;
    }

  if (profile_info && flag_branch_probabilities)
    cover_insns = PARAM_VALUE (TRACER_DYNAMIC_COVERAGE_FEEDBACK);
  else
    cover_insns = PARAM_VALUE (TRACER_DYNAMIC_COVERAGE);
  cover_insns = (weighted_insns * cover_insns + 50) / 100;
  max_dup_insns = (ninsns * PARAM_VALUE (TRACER_MAX_CODE_GROWTH) + 50) / 100;

  while (traced_insns < cover_insns && nduplicated < max_dup_insns
         && !fibheap_empty (heap))
    {
      basic_block bb = fibheap_extract_min (heap);
      int n, pos;

      if (!bb)
	break;

      blocks[bb->index] = NULL;

      if (ignore_bb_p (bb))
	continue;
      gcc_assert (!seen (bb));

      n = find_trace (bb, trace);

      bb = trace[0];
      traced_insns += bb->frequency * counts [bb->index];
      if (blocks[bb->index])
	{
	  fibheap_delete_node (heap, blocks[bb->index]);
	  blocks[bb->index] = NULL;
	}

      for (pos = 1; pos < n; pos++)
	{
	  basic_block bb2 = trace[pos];

	  if (blocks[bb2->index])
	    {
	      fibheap_delete_node (heap, blocks[bb2->index]);
	      blocks[bb2->index] = NULL;
	    }
	  traced_insns += bb2->frequency * counts [bb2->index];
	  if (EDGE_COUNT (bb2->preds) > 1
	      && can_duplicate_block_p (bb2))
	    {
	      edge e;
	      basic_block old = bb2;

	      e = find_edge (bb, bb2);

	      nduplicated += counts [bb2->index];
	      bb2 = duplicate_block (bb2, e, bb);

	      /* Reconsider the original copy of block we've duplicated.
	         Removing the most common predecessor may make it to be
	         head.  */
	      blocks[old->index] =
		fibheap_insert (heap, -old->frequency, old);

	      if (dump_file)
		fprintf (dump_file, "Duplicated %i as %i [%i]\n",
			 old->index, bb2->index, bb2->frequency);
	    }
	  bb->aux = bb2;
	  bb2->il.rtl->visited = 1;
	  bb = bb2;
	  /* In case the trace became infrequent, stop duplicating.  */
	  if (ignore_bb_p (bb))
	    break;
	}
      if (dump_file)
	fprintf (dump_file, " covered now %.1f\n\n",
		 traced_insns * 100.0 / weighted_insns);
    }
  if (dump_file)
    fprintf (dump_file, "Duplicated %i insns (%i%%)\n", nduplicated,
	     nduplicated * 100 / ninsns);

  free (blocks);
  free (trace);
  free (counts);
  fibheap_delete (heap);
}