don't do AGGRESSIVE_AM

[libfirm] / ir / be / ia32 / ia32_x87.c

diff --git a/ir/be/ia32/ia32_x87.c b/ir/be/ia32/ia32_x87.c
index 9df86db..2a60119 100644 (file)
--- a/ir/be/ia32/ia32_x87.c
+++ b/ir/be/ia32/ia32_x87.c
@@ -2066,6 +2066,8 @@ static void x87_simulate_block(x87_simulator *sim, ir_node *block) {
 
        /* at block begin, kill all dead registers */
        state = x87_kill_deads(sim, block, state);
+       /* create a new state, will be changed */
+       state = x87_clone_state(sim, state);
 
        /* beware, n might change */
        for (n = sched_first(block); !sched_is_end(n); n = next) {
@@ -2079,12 +2081,6 @@ static void x87_simulate_block(x87_simulator *sim, ir_node *block) {
 
                func = (sim_func)op->ops.generic;
 
-               /* have work to do */
-               if (state == bl_state->begin) {
-                       /* create a new state, will be changed */
-                       state = x87_clone_state(sim, state);
-               }
-
                /* simulate it */
                node_inserted = (*func)(state, n);
 
@@ -2100,6 +2096,8 @@ static void x87_simulate_block(x87_simulator *sim, ir_node *block) {
 
        start_block = get_irg_start_block(get_irn_irg(block));
 
+       DB((dbg, LEVEL_2, "State at Block end:\n ")); DEBUG_ONLY(x87_dump_stack(state));
+
        /* check if the state must be shuffled */
        foreach_block_succ(block, edge) {
                ir_node *succ = get_edge_src_irn(edge);
@@ -2113,10 +2111,13 @@ static void x87_simulate_block(x87_simulator *sim, ir_node *block) {
                fix_unknown_phis(state, succ, block, get_edge_src_pos(edge));
 
                if (succ_state->begin == NULL) {
+                       DB((dbg, LEVEL_2, "Set begin state for succ %+F:\n", succ));
+                       DEBUG_ONLY(x87_dump_stack(state));
                        succ_state->begin = state;
 
                        waitq_put(sim->worklist, succ);
                } else {
+                       DB((dbg, LEVEL_2, "succ %+F already has a state, shuffling\n", succ));
                        /* There is already a begin state for the successor, bad.
                           Do the necessary permutations.
                           Note that critical edges are removed, so this is always possible:
@@ -2127,8 +2128,6 @@ static void x87_simulate_block(x87_simulator *sim, ir_node *block) {
                }
        }
        bl_state->end = state;
-
-       DB((dbg, LEVEL_2, "State at Block end:\n ")); DEBUG_ONLY(x87_dump_stack(state));
 }  /* x87_simulate_block */
 
 /**