Let dfs() discover only memory nodes

[libfirm] / ir / be / bepeephole.h

diff --git a/ir/be/bepeephole.h b/ir/be/bepeephole.h
index 1fe1ed5..496634d 100644 (file)
--- a/ir/be/bepeephole.h
+++ b/ir/be/bepeephole.h
@@ -32,13 +32,13 @@
 
 extern ir_node ***register_values;
 
-static inline ir_node *be_peephole_get_value(unsigned regclass_idx,
+static INLINE ir_node *be_peephole_get_value(unsigned regclass_idx,
                                              unsigned register_idx)
 {
        return register_values[regclass_idx][register_idx];
 }
 
-static inline ir_node *be_peephole_get_reg_value(const arch_register_t *reg)
+static INLINE ir_node *be_peephole_get_reg_value(const arch_register_t *reg)
 {
        unsigned regclass_idx = arch_register_class_index(arch_register_get_class(reg));
        unsigned register_idx = arch_register_get_index(reg);
@@ -47,10 +47,21 @@ static inline ir_node *be_peephole_get_reg_value(const arch_register_t *reg)
 }
 
 /**
- * Datatype of the generic op handler for optimisation. If it exchanged node
- * with something else, then it must return the new node, otherwise NULL.
+ * Datatype of the generic op handler for optimisation.
  */
-typedef ir_node*(*peephole_opt_func) (ir_node *node);
+typedef void (*peephole_opt_func) (ir_node *node);
+
+/**
+ * must be called from peephole optimisations before a node is exchanged,
+ * so bepeephole can update it's internal state.
+ */
+void be_peephole_before_exchange(const ir_node *old_node, ir_node *new_node);
+
+/**
+ * must be called from peephole optimisations after a node is exchanged,
+ * so bepeephole can update it's internal state.
+ */
+void be_peephole_after_exchange(ir_node *new_node);
 
 /**
  * Do peephole optimisations. It traverses the schedule of all blocks in