debug output updated

diff --git a/ir/be/ia32/ia32_x87.c b/ir/be/ia32/ia32_x87.c
index 7eb7d22..fbd2b45 100644 (file)
--- a/ir/be/ia32/ia32_x87.c
+++ b/ir/be/ia32/ia32_x87.c
@@ -337,14 +337,15 @@ static ir_node *x87_fxch_shuffle(x87_state *state, int pos, ir_node *block, ir_n
        attr->x87[0] = &ia32_st_regs[pos];
        attr->x87[2] = &ia32_st_regs[0];
 
-       DB((dbg, LEVEL_2, "%+F replaced input %d of %+F\n", fxch, node_idx, user));
-
-       if (user)
+       if (user) {
+               DB((dbg, LEVEL_2, "%+F replaced input %d of %+F\n", fxch, node_idx, user));
                set_irn_n(user, node_idx, fxch);
+       }
        else {
-               /* This is a node from another block. Changing it's user might be wrong,
-                  sp just keep it alive.
-                        The "right" solution would require a new Phi, but we don't care here.
+               /*
+                * This is a node from a dominator block. Changing it's user might be wrong,
+                * so just keep it alive.
+                * The "right" solution would require a new Phi, but we don't care here.
                 */
                keep_alive(fxch);
        }
@@ -1009,7 +1010,7 @@ static int x87_simulate_block(x87_simulator *sim, ir_node *block) {
 /**
  * Create a new x87 simulator.
  */
-static void x87_init_simulator(x87_simulator *sim, const arch_env_t *env) {
+static void x87_init_simulator(x87_simulator *sim, ir_graph *irg, const arch_env_t *env) {
        obstack_init(&sim->obst);
        sim->blk_states = pmap_create();
        sim->env        = env;
@@ -1017,7 +1018,8 @@ static void x87_init_simulator(x87_simulator *sim, const arch_env_t *env) {
   FIRM_DBG_REGISTER(dbg, "firm.be.ia32.x87");
        firm_dbg_set_mask(dbg, SET_LEVEL_2);
 
-       DB((dbg, LEVEL_1, "x87 Simulator started\n"));
+       DB((dbg, LEVEL_1, "--------------------------------\n"
+               "x87 Simulator started for %+F\n", irg));
 
   /* set the generic function pointer of instruction we must simulate */
        clear_irp_opcodes_generic_func();
@@ -1053,7 +1055,7 @@ static void x87_init_simulator(x87_simulator *sim, const arch_env_t *env) {
 static void x87_destroy_simulator(x87_simulator *sim) {
        pmap_destroy(sim->blk_states);
        obstack_free(&sim->obst, NULL);
-       DB((dbg, LEVEL_1, "x87 Simulator stopped\n"));
+       DB((dbg, LEVEL_1, "x87 Simulator stopped\n\n"));
 }
 
 /**
@@ -1072,7 +1074,7 @@ void x87_simulate_graph(const arch_env_t *env, ir_graph *irg, ir_node **blk_list
        be_liveness(irg);
 
   /* create the simulator */
-       x87_init_simulator(&sim, env);
+       x87_init_simulator(&sim, irg, env);
 
        start_block = get_irg_start_block(irg);
        bl_state = x87_get_bl_state(&sim, start_block);