Moved some helper functions from irgopt to irtools for reuse.

ir/common/irtools.c

 /*
- * Copyright (C) 1995-2008 University of Karlsruhe.  All right reserved.
+ * Copyright (C) 1995-2011 University of Karlsruhe.  All right reserved.
  *
  * This file is part of libFirm.
  *
@@ -51,6 +51,20 @@ void firm_clear_node_and_phi_links(ir_node *n, void *env)
 		set_Phi_next(n, NULL);
 }
 
+void firm_clear_block_phis(ir_node *node, void *env)
+{
+	(void) env;
+	if (is_Block(node))
+		set_Block_phis(node, NULL);
+}
+
+void firm_collect_block_phis(ir_node *node, void *env)
+{
+	(void) env;
+	if (is_Phi(node))
+		add_Block_phi(get_nodes_block(node), node);
+}
+
 void copy_irn_to_irg(ir_node *n, ir_graph *irg)
 {
 	ir_op *op = get_irn_op(n);

ir/common/irtools.h

@@ -77,10 +77,23 @@ void firm_clear_link(ir_node *n, void *env);
  * The famous clear_link_and_block_lists() walker-function.
  * Sets all links fields of visited nodes to NULL.
  * Additionally, clear all Phi-lists of visited blocks.
- * Do not implement it by yourself, use this one
+ * Do not implement it by yourself, use this one.
  */
 void firm_clear_node_and_phi_links(ir_node *n, void *env);
 
+/**
+ * Walker function, sets all phi list heads fields of visited Blocks
+ * to NULL.
+ * Use in conjunction with firm_collect_block_phis().
+ */
+void firm_clear_block_phis(ir_node *node, void *env);
+
+/**
+ * Walker function, links all visited Phi nodes into its block links.
+ * Use in conjunction with firm_clear_block_phis().
+ */
+void firm_collect_block_phis(ir_node *node, void *env);
+
 /**
  * Creates an exact copy of a node with same inputs and attributes in the
  * same block.

ir/ir/irgopt.c

@@ -182,20 +182,6 @@ static void opt_walker(ir_node *n, void *env)
 	}
 }
 
-static void clear_block_phis(ir_node *node, void *env) {
-	(void) env;
-	if (is_Block(node)) {
-		set_Block_phis(node, NULL);
-	}
-}
-
-static void collect_block_phis(ir_node *node, void *env) {
-	(void) env;
-	if (is_Phi(node)) {
-		add_Block_phi(get_nodes_block(node), node);
-	}
-}
-
 static int count_non_bads(ir_node *node) {
 	int arity = get_irn_arity(node);
 	int count = 0;
@@ -275,7 +261,7 @@ static void block_remove_bads(ir_node *block, int *changed) {
 static int remove_Bads(ir_graph *irg) {
 	int changed = 0;
 	/* build phi list per block */
-	irg_walk_graph(irg, clear_block_phis, collect_block_phis, NULL);
+	irg_walk_graph(irg, firm_clear_block_phis, firm_collect_block_phis, NULL);
 
 	/* actually remove Bads */
 	irg_block_walk_graph(irg, NULL, (void (*)(struct ir_node *, void *)) block_remove_bads, &changed);