+
+
+/* Reorder basic blocks. */
+static unsigned int
+rest_of_handle_reorder_blocks (void)
+{
+ basic_block bb;
+
+ /* Last attempt to optimize CFG, as scheduling, peepholing and insn
+ splitting possibly introduced more crossjumping opportunities. */
+ cfg_layout_initialize (CLEANUP_EXPENSIVE);
+
+ if ((flag_reorder_blocks || flag_reorder_blocks_and_partition)
+ /* Don't reorder blocks when optimizing for size because extra jump insns may
+ be created; also barrier may create extra padding.
+
+ More correctly we should have a block reordering mode that tried to
+ minimize the combined size of all the jumps. This would more or less
+ automatically remove extra jumps, but would also try to use more short
+ jumps instead of long jumps. */
+ && optimize_function_for_speed_p (cfun))
+ {
+ reorder_basic_blocks ();
+ cleanup_cfg (CLEANUP_EXPENSIVE);
+ }
+
+ FOR_EACH_BB (bb)
+ if (bb->next_bb != EXIT_BLOCK_PTR)
+ bb->aux = bb->next_bb;
+ cfg_layout_finalize ();
+
+ /* Add NOTE_INSN_SWITCH_TEXT_SECTIONS notes. */
+ insert_section_boundary_note ();
+ return 0;
+}
+
+struct rtl_opt_pass pass_reorder_blocks =
+{
+ {
+ RTL_PASS,
+ "bbro", /* name */
+ gate_handle_reorder_blocks, /* gate */
+ rest_of_handle_reorder_blocks, /* execute */
+ NULL, /* sub */
+ NULL, /* next */
+ 0, /* static_pass_number */
+ TV_REORDER_BLOCKS, /* tv_id */
+ 0, /* properties_required */
+ 0, /* properties_provided */
+ 0, /* properties_destroyed */
+ 0, /* todo_flags_start */
+ TODO_dump_func | TODO_verify_rtl_sharing,/* todo_flags_finish */
+ }
+};
+
+static bool
+gate_handle_partition_blocks (void)
+{
+ /* The optimization to partition hot/cold basic blocks into separate
+ sections of the .o file does not work well with linkonce or with
+ user defined section attributes. Don't call it if either case
+ arises. */
+
+ return (flag_reorder_blocks_and_partition
+ && !DECL_ONE_ONLY (current_function_decl)
+ && !user_defined_section_attribute);
+}
+
+/* Partition hot and cold basic blocks. */
+static unsigned int
+rest_of_handle_partition_blocks (void)
+{
+ partition_hot_cold_basic_blocks ();
+ return 0;
+}
+
+struct rtl_opt_pass pass_partition_blocks =
+{
+ {
+ RTL_PASS,
+ "bbpart", /* name */
+ gate_handle_partition_blocks, /* gate */
+ rest_of_handle_partition_blocks, /* execute */
+ NULL, /* sub */
+ NULL, /* next */
+ 0, /* static_pass_number */
+ TV_REORDER_BLOCKS, /* tv_id */
+ 0, /* properties_required */
+ 0, /* properties_provided */
+ 0, /* properties_destroyed */
+ 0, /* todo_flags_start */
+ TODO_dump_func | TODO_verify_rtl_sharing/* todo_flags_finish */
+ }
+};
+
+