irverify: simplify/refactor internal interfaces

include/libfirm/irop.h

@@ -208,7 +208,7 @@ typedef ir_entity *(*get_entity_attr_func)(const ir_node *self);
  *
  * @see do_node_verification()
  */
-typedef int (*verify_node_func)(ir_node *self, ir_graph *irg);
+typedef int (*verify_node_func)(const ir_node *node);
 
 /**
  * The verify_node operation for Proj(X).
@@ -217,7 +217,7 @@ typedef int (*verify_node_func)(ir_node *self, ir_graph *irg);
  *
  * @see do_node_verification()
  */
-typedef int (*verify_proj_node_func)(ir_node *self, ir_node *proj);
+typedef int (*verify_proj_node_func)(const ir_node *proj);
 
 /**
  * Reasons to call the dump_node operation:

include/libfirm/irverify.h

@@ -35,7 +35,7 @@
  *
  * @return NON-zero on success
  */
-FIRM_API int irn_verify(ir_node *checknode);
+FIRM_API int irn_verify(const ir_node *checknode);
 
 /**
  * Tests the modes of checknode and its predecessors.
@@ -43,14 +43,15 @@ FIRM_API int irn_verify(ir_node *checknode);
  *
  * @return NON-zero on success
  */
-FIRM_API int irn_verify_irg(ir_node *checknode, ir_graph *irg);
+FIRM_API int irn_verify_irg(const ir_node *checknode, ir_graph *irg);
 
 /**
  * Same as irn_verify_irg, but temporary sets verification mode to
  * NODE_VERIFICATION_ERROR_ONLY.
  * @return NON-zero on success
  */
-FIRM_API int irn_verify_irg_dump(ir_node *checknode, ir_graph *irg, const char **bad_string);
+FIRM_API int irn_verify_irg_dump(const ir_node *checknode, ir_graph *irg,
+                                 const char **bad_string);
 
 /**
  * Flags for irg_verify().

ir/ir/irgraph.c

@@ -630,7 +630,7 @@ struct obstack *
  *
  * Implementation is GLIBC specific as is uses the internal _obstack_chunk implementation.
  */
-int node_is_in_irgs_storage(ir_graph *irg, ir_node *n)
+int node_is_in_irgs_storage(const ir_graph *irg, const ir_node *n)
 {
 	struct _obstack_chunk *p;
 

ir/ir/irgraph_t.h

@@ -93,7 +93,7 @@ struct obstack *get_irg_obstack(const ir_graph *irg);
  * @param irg   the IR graph
  * @param n the IR node
  */
-int node_is_in_irgs_storage(ir_graph *irg, ir_node *n);
+int node_is_in_irgs_storage(const ir_graph *irg, const ir_node *n);
 
 /*-------------------------------------------------------------------*/
 /* inline functions for graphs                                       */