optimize next_use calculation (quadratic in number of outs not number of nodes in...

[libfirm] / ir / be / bemain.c

diff --git a/ir/be/bemain.c b/ir/be/bemain.c
index e4af781..0b4f639 100644 (file)
--- a/ir/be/bemain.c
+++ b/ir/be/bemain.c
@@ -314,8 +314,8 @@ static void initialize_birg(be_irg_t *birg, ir_graph *irg, be_main_env_t *env)
        /* Normalize proj nodes. */
        normalize_proj_nodes(irg);
 
-       /* create multiple return nodes */
-       /* TODO: find out why this does nothing */
+       /* we do this before critical edge split. As this produces less returns,
+          because sometimes (= 164.gzip) multiple returns are slower */
        normalize_n_returns(irg);
 
        /* Remove critical edges */
@@ -328,6 +328,8 @@ static void initialize_birg(be_irg_t *birg, ir_graph *irg, be_main_env_t *env)
        be_phi_handler_reset(env->phi_handler);
 
        set_irg_phase_state(irg, phase_backend);
+
+       dump(DUMP_INITIAL, irg, "-prepared", dump_ir_block_graph);
 }
 
 #define BE_TIMER_PUSH(timer)                                                        \