return num_edges;
}
-#define OVERLAP_BASE 10000
-
-/* Compare the static estimated profile to the actual profile, and
- return the "degree of overlap" measure between them.
-
- Degree of overlap is a number between 0 and OVERLAP_BASE. It is
- the sum of each basic block's minimum relative weights between
- two profiles. And overlap of OVERLAP_BASE means two profiles are
- identical. */
-
-static int
-compute_frequency_overlap (void)
-{
- gcov_type count_total = 0, freq_total = 0;
- int overlap = 0;
- basic_block bb;
-
- FOR_BB_BETWEEN (bb, ENTRY_BLOCK_PTR_FOR_FN (cfun), NULL, next_bb)
- {
- count_total += bb_gcov_count (bb);
- freq_total += bb->frequency;
- }
-
- if (count_total == 0 || freq_total == 0)
- return 0;
-
- FOR_BB_BETWEEN (bb, ENTRY_BLOCK_PTR_FOR_FN (cfun), NULL, next_bb)
- overlap += MIN (bb_gcov_count (bb) * OVERLAP_BASE / count_total,
- bb->frequency * OVERLAP_BASE / freq_total);
-
- return overlap;
-}
/* Compute the branch probabilities for the various branches.
Annotate them accordingly.
}
}
}
- if (dump_file)
- {
- int overlap = compute_frequency_overlap ();
- gimple_dump_cfg (dump_file, dump_flags);
- fprintf (dump_file, "Static profile overlap: %d.%d%%\n",
- overlap / (OVERLAP_BASE / 100),
- overlap % (OVERLAP_BASE / 100));
- }
total_num_passes += passes;
if (dump_file)
}
}
- FOR_ALL_BB_FN (bb, cfun)
- {
+ /* If we have real data, use them! */
+ if (bb_gcov_count (ENTRY_BLOCK_PTR_FOR_FN (cfun))
+ || !flag_guess_branch_prob)
+ FOR_ALL_BB_FN (bb, cfun)
bb->count = profile_count::from_gcov_type (bb_gcov_count (bb));
- }
+ /* If function was not trained, preserve local estimates including statically
+ determined zero counts. */
+ else
+ FOR_ALL_BB_FN (bb, cfun)
+ if (!(bb->count == profile_count::zero ()))
+ bb->count = bb->count.global0 ();
+
bb_gcov_counts.release ();
delete edge_gcov_counts;
edge_gcov_counts = NULL;