X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fbe%2Fbeabihelper.c;h=0aec1415257573832747341a99cc06f999d434db;hb=6f068af98daa4725d60e5d23a8f98ec2841cfa44;hp=647a8bfd81720d1fdeec8903394274101aabfd07;hpb=ed1bfc1f771e85ea78fb4279eac9a4892fe6cb03;p=libfirm

diff --git a/ir/be/beabihelper.c b/ir/be/beabihelper.c
index 647a8bfd8..0aec14152 100644
--- a/ir/be/beabihelper.c
+++ b/ir/be/beabihelper.c
@@ -165,9 +165,9 @@ static void rsm_clear_regs(register_state_mapping_t *rsm,
  * Add a register and its constraint flags to a register state map
  * and return its index inside the map.
  */
-static int rsm_add_reg(register_state_mapping_t *rsm,
-                       const arch_register_t *reg,
-                       arch_register_req_type_t flags)
+static size_t rsm_add_reg(register_state_mapping_t *rsm,
+                          const arch_register_t *reg,
+                           arch_register_req_type_t flags)
 {
 	size_t     input_idx = ARR_LEN(rsm->regs);
 	int        cls_idx   = reg->reg_class->index;
@@ -267,8 +267,6 @@ ir_node *be_prolog_create_start(beabi_helper_env_t *env, dbg_info *dbgi,
 	ir_node *start        = be_new_Start(dbgi, block, n_start_outs);
 	int      o;
 
-	arch_irn_add_flags(start, arch_irn_flags_prolog);
-
 	assert(env->prolog.value_map == NULL);
 	env->prolog.value_map = NEW_ARR_F(ir_node*, n_start_outs);
 
@@ -326,7 +324,7 @@ void be_epilog_begin(beabi_helper_env_t *env)
 void be_epilog_add_reg(beabi_helper_env_t *env, const arch_register_t *reg,
                        arch_register_req_type_t flags, ir_node *value)
 {
-	int index = rsm_add_reg(&env->epilog, reg, flags);
+	size_t index = rsm_add_reg(&env->epilog, reg, flags);
 	rsm_set_value(&env->epilog, index, value);
 }
 
@@ -366,7 +364,6 @@ ir_node *be_epilog_create_return(beabi_helper_env_t *env, dbg_info *dbgi,
 
 	ret = be_new_Return(dbgi, get_irn_irg(block), block, n_res, pop,
 	                    n_return_in, in);
-	arch_irn_add_flags(ret, arch_irn_flags_epilog);
 	for (i = 0; i < n_return_in; ++i) {
 		const reg_flag_t      *regflag = &env->epilog.regs[i];
 		const arch_register_t *reg     = regflag->reg;
@@ -382,7 +379,7 @@ ir_node *be_epilog_create_return(beabi_helper_env_t *env, dbg_info *dbgi,
 }
 
 /**
- * Tests wether a node has a real user and is not just kept by the End or
+ * Tests whether a node has a real user and is not just kept by the End or
  * Anchor node
  */
 static bool has_real_user(const ir_node *node)
@@ -414,10 +411,6 @@ static ir_node *add_to_keep(ir_node *last_keep,
 		}
 	}
 	op = skip_Proj_const(node);
-	if (arch_irn_get_flags(op) & arch_irn_flags_prolog)
-		arch_irn_add_flags(last_keep, arch_irn_flags_prolog);
-	if (arch_irn_get_flags(op) & arch_irn_flags_epilog)
-		arch_irn_add_flags(last_keep, arch_irn_flags_epilog);
 	return last_keep;
 }
 
@@ -428,6 +421,7 @@ static void add_missing_keep_walker(ir_node *node, void *data)
 	const ir_edge_t *edge;
 	ir_mode         *mode = get_irn_mode(node);
 	ir_node         *last_keep;
+	ir_node        **existing_projs;
 	(void) data;
 	if (mode != mode_T) {
 		if (!has_real_user(node)) {
@@ -448,6 +442,7 @@ static void add_missing_keep_walker(ir_node *node, void *data)
 		return;
 
 	rbitset_alloca(found_projs, n_outs);
+	existing_projs = ALLOCANZ(ir_node*, n_outs);
 	foreach_out_edge(node, edge) {
 		ir_node *succ = get_edge_src_irn(edge);
 		ir_mode *mode = get_irn_mode(succ);
@@ -458,10 +453,11 @@ static void add_missing_keep_walker(ir_node *node, void *data)
 			continue;
 		if (mode == mode_M || mode == mode_X)
 			continue;
+		pn                 = get_Proj_proj(succ);
+		existing_projs[pn] = succ;
 		if (!has_real_user(succ))
 			continue;
 
-		pn = get_Proj_proj(succ);
 		assert(pn < n_outs);
 		rbitset_set(found_projs, pn);
 	}
@@ -483,7 +479,9 @@ static void add_missing_keep_walker(ir_node *node, void *data)
 			continue;
 		}
 
-		value     = new_r_Proj(node, arch_register_class_mode(cls), i);
+		value = existing_projs[i];
+		if (value == NULL)
+			value = new_r_Proj(node, arch_register_class_mode(cls), i);
 		last_keep = add_to_keep(last_keep, cls, value);
 	}
 }