diff options
Diffstat (limited to 'gcc/loop-unroll.c')
| -rw-r--r-- | gcc/loop-unroll.c | 17 |
1 files changed, 5 insertions, 12 deletions
diff --git a/gcc/loop-unroll.c b/gcc/loop-unroll.c index 816302b..91bf5dd 100644 --- a/gcc/loop-unroll.c +++ b/gcc/loop-unroll.c @@ -863,7 +863,7 @@ unroll_loop_runtime_iterations (struct loop *loop) unsigned i, j; profile_probability p; basic_block preheader, *body, swtch, ezc_swtch = NULL; - int may_exit_copy, iter_freq, new_freq; + int may_exit_copy; profile_count iter_count, new_count; unsigned n_peel; edge e; @@ -970,12 +970,10 @@ unroll_loop_runtime_iterations (struct loop *loop) /* Record the place where switch will be built for preconditioning. */ swtch = split_edge (loop_preheader_edge (loop)); - /* Compute frequency/count increments for each switch block and initialize + /* Compute count increments for each switch block and initialize innermost switch block. Switch blocks and peeled loop copies are built from innermost outward. */ - iter_freq = new_freq = swtch->frequency / (max_unroll + 1); iter_count = new_count = swtch->count.apply_scale (1, max_unroll + 1); - swtch->frequency = new_freq; swtch->count = new_count; for (i = 0; i < n_peel; i++) @@ -995,8 +993,7 @@ unroll_loop_runtime_iterations (struct loop *loop) p = profile_probability::always ().apply_scale (1, i + 2); preheader = split_edge (loop_preheader_edge (loop)); - /* Add in frequency/count of edge from switch block. */ - preheader->frequency += iter_freq; + /* Add in count of edge from switch block. */ preheader->count += iter_count; branch_code = compare_and_jump_seq (copy_rtx (niter), GEN_INT (j), EQ, block_label (preheader), p, @@ -1009,9 +1006,7 @@ unroll_loop_runtime_iterations (struct loop *loop) swtch = split_edge_and_insert (single_pred_edge (swtch), branch_code); set_immediate_dominator (CDI_DOMINATORS, preheader, swtch); single_succ_edge (swtch)->probability = p.invert (); - new_freq += iter_freq; new_count += iter_count; - swtch->frequency = new_freq; swtch->count = new_count; e = make_edge (swtch, preheader, single_succ_edge (swtch)->flags & EDGE_IRREDUCIBLE_LOOP); @@ -1024,12 +1019,10 @@ unroll_loop_runtime_iterations (struct loop *loop) p = profile_probability::always ().apply_scale (1, max_unroll + 1); swtch = ezc_swtch; preheader = split_edge (loop_preheader_edge (loop)); - /* Recompute frequency/count adjustments since initial peel copy may + /* Recompute count adjustments since initial peel copy may have exited and reduced those values that were computed above. */ - iter_freq = swtch->frequency / (max_unroll + 1); iter_count = swtch->count.apply_scale (1, max_unroll + 1); - /* Add in frequency/count of edge from switch block. */ - preheader->frequency += iter_freq; + /* Add in count of edge from switch block. */ preheader->count += iter_count; branch_code = compare_and_jump_seq (copy_rtx (niter), const0_rtx, EQ, block_label (preheader), p, |