cgraph.h: Remove misledaing comment on ipa-ref.h.

	* cgraph.h: Remove misledaing comment on ipa-ref.h.
	(symtab_type): New enum.
	(symtab_node): New structure.
	(cgraph_node, varpool_node): Add symbol base type.
	(cgraph, varpool): New accestor functions.
	* cgraph.c (cgraph_create_node_1): Set symbol type.
	* varpool.c (varpool_node): Set symbol type.

From-SVN: r186284

gcc/ChangeLog

+2012-04-10  Jan Hubicka  <jh@suse.cz>
+
+	* cgraph.h: Remove misledaing comment on ipa-ref.h.
+	(symtab_type): New enum.
+	(symtab_node): New structure.
+	(cgraph_node, varpool_node): Add symbol base type.
+	(cgraph, varpool): New accestor functions.
+	* cgraph.c (cgraph_create_node_1): Set symbol type.
+	* varpool.c (varpool_node): Set symbol type.
+
 2012-04-10  Ulrich Weigand  <ulrich.weigand@linaro.org>
 	    Richard Sandiford  <rdsandiford@googlemail.com>
 

gcc/cgraph.c

@@ -473,6 +473,7 @@ cgraph_create_node_1 (void)
 {
   struct cgraph_node *node = cgraph_allocate_node ();
 
+  node->symbol.type = SYMTAB_FUNCTION;
   node->next = cgraph_nodes;
   node->order = cgraph_order++;
   if (cgraph_nodes)

gcc/cgraph.h

@@ -27,7 +27,23 @@ along with GCC; see the file COPYING3.  If not see
 #include "tree.h"
 #include "basic-block.h"
 #include "function.h"
-#include "ipa-ref.h"	/* FIXME: inappropriate dependency of cgraph on IPA.  */
+#include "ipa-ref.h"
+
+/* Symbol table consists of functions and variables.
+   TODO: add labels, constant pool and aliases.  */
+enum symtab_type
+{
+  SYMTAB_FUNCTION,
+  SYMTAB_VARIABLE
+};
+
+/* Base of all entries in the symbol table.
+   The symtab_node is inherited by cgraph and varpol nodes.  */
+struct GTY(()) symtab_node
+{
+  /* Type of the symbol.  */
+  enum symtab_type type;
+};
 
 enum availability
 {
@@ -150,6 +166,7 @@ struct GTY(()) cgraph_clone_info
    Each function decl has assigned cgraph_node listing callees and callers.  */
 
 struct GTY((chain_next ("%h.next"), chain_prev ("%h.previous"))) cgraph_node {
+  struct symtab_node symbol;
   tree decl;
   struct cgraph_edge *callees;
   struct cgraph_edge *callers;
@@ -387,6 +404,7 @@ DEF_VEC_ALLOC_P(cgraph_edge_p,heap);
    Each static variable decl has assigned varpool_node.  */
 
 struct GTY((chain_next ("%h.next"), chain_prev ("%h.prev"))) varpool_node {
+  struct symtab_node symbol;
   tree decl;
   /* For aliases points to declaration DECL is alias of.  */
   tree alias_of;
@@ -689,6 +707,23 @@ void varpool_add_new_variable (tree);
 #define FOR_EACH_STATIC_VARIABLE(node) \
    for ((node) = varpool_nodes_queue; (node); (node) = (node)->next_needed)
 
+/* Return callgraph node for given symbol and check it is a function. */
+static inline struct cgraph_node *
+cgraph (struct symtab_node *node)
+{
+  gcc_checking_assert (node->type == SYMTAB_FUNCTION);
+  return (struct cgraph_node *)node;
+}
+
+/* Return varpool node for given symbol and check it is a variable.  */
+static inline struct varpool_node *
+varpool (struct symtab_node *node)
+{
+  gcc_checking_assert (node->type == SYMTAB_FUNCTION);
+  return (struct varpool_node *)node;
+}
+
+
 /* Return first reachable static variable with initializer.  */
 static inline struct varpool_node *
 varpool_first_static_initializer (void)

gcc/varpool.c

@@ -142,6 +142,7 @@ varpool_node (tree decl)
   if (*slot)
     return *slot;
   node = ggc_alloc_cleared_varpool_node ();
+  node->symbol.type = SYMTAB_VARIABLE;
   node->decl = decl;
   node->order = cgraph_order++;
   node->next = varpool_nodes;