Developed further... might be unstable. so don't use for the moment.

spill placement to be done.

[r15765]

ir/be/bespill.c

@@ -69,6 +69,7 @@ DEBUG_ONLY(static firm_dbg_module_t *dbg = NULL;)
 typedef struct reloader_t reloader_t;
 struct reloader_t {
 	reloader_t *next;
+	ir_node    *can_spill_after;
 	ir_node    *reloader;
 	ir_node    *rematted_node;
 	int         remat_cost_delta; /** costs needed for rematerialization,
@@ -209,7 +210,7 @@ void be_add_remat(spill_env_t *env, ir_node *to_spill, ir_node *before,
 		to_spill, before));
 }
 
-void be_add_reload(spill_env_t *env, ir_node *to_spill, ir_node *before,
+void be_add_reload2(spill_env_t *env, ir_node *to_spill, ir_node *before, ir_node *can_spill_after,
                    const arch_register_class_t *reload_cls, int allow_remat)
 {
 	spill_info_t *info;
@@ -244,15 +245,12 @@ void be_add_reload(spill_env_t *env, ir_node *to_spill, ir_node *before,
 	assert(!is_Proj(before) && !be_is_Keep(before));
 
 	/* put reload into list */
-	rel                = obstack_alloc(&env->obst, sizeof(rel[0]));
-	rel->next          = info->reloaders;
-	rel->reloader      = before;
-	rel->rematted_node = NULL;
-	if(!allow_remat) {
-		rel->remat_cost_delta = REMAT_COST_INFINITE;
-	} else {
-		rel->remat_cost_delta = 0;
-	}
+	rel                   = obstack_alloc(&env->obst, sizeof(rel[0]));
+	rel->next             = info->reloaders;
+	rel->reloader         = before;
+	rel->rematted_node    = NULL;
+	rel->can_spill_after  = can_spill_after;
+	rel->remat_cost_delta = allow_remat ? 0 : REMAT_COST_INFINITE;
 
 	info->reloaders  = rel;
 	assert(info->reload_cls == NULL || info->reload_cls == reload_cls);
@@ -262,6 +260,13 @@ void be_add_reload(spill_env_t *env, ir_node *to_spill, ir_node *before,
 		to_spill, before, allow_remat ? "" : " not"));
 }
 
+void be_add_reload(spill_env_t *senv, ir_node *to_spill, ir_node *before,
+                   const arch_register_class_t *reload_cls, int allow_remat)
+{
+	be_add_reload2(senv, to_spill, before, to_spill, reload_cls, allow_remat);
+
+}
+
 ir_node *be_get_end_of_block_insertion_point(const ir_node *block)
 {
 	ir_node *last = sched_last(block);

ir/be/bespill.h

@@ -65,6 +65,9 @@ ir_node *be_get_end_of_block_insertion_point(const ir_node *block);
 void be_add_reload(spill_env_t *senv, ir_node *to_spill, ir_node *before,
                    const arch_register_class_t *reload_cls, int allow_remat);
 
+void be_add_reload2(spill_env_t *senv, ir_node *to_spill, ir_node *before, ir_node *can_spill_after,
+                   const arch_register_class_t *reload_cls, int allow_remat);
+
 /**
  * Add a reload at the end of a block.
  * Similar to be_add_reload_on_edge().