accessor to check whether node currently is pinned.

[r6117]

ir/ir/irnode.c

@@ -407,6 +407,11 @@ op_pin_state
   return _get_irn_pinned(node);
 }
 
+op_pin_state
+(is_irn_pinned_in_irg) (const ir_node *node) {
+  return _is_irn_pinned_in_irg(node);
+}
+
 void set_irn_pinned(ir_node *node, op_pin_state state) {
   /* due to optimization an opt may be turned into a Tuple */
   if (get_irn_op(node) == op_Tuple)

ir/ir/irnode.h

@@ -161,12 +161,26 @@ ir_graph     *get_irn_irg      (const ir_node *node);
    of node cast to long. */
 long          get_irn_node_nr  (const ir_node *node);
 
-/** Returns the pinned state of a node. */
+/** Returns the pinned state of a node.
+ *
+ *  Returns whether the node _always_ must be pinned.
+ *  I.e., the node is not floating after global cse.
+ *
+ * @returns Either state op_pin_state_pinned or op_pin_state_floats.
+ */
 op_pin_state get_irn_pinned    (const ir_node *node);
 
 /** Set pin state for nodes with op pin state op_pin_state_exc_pinned */
 void set_irn_pinned(ir_node *node, op_pin_state state);
 
+/** Returns whether the node is currently pinned.
+ *
+ * If get_irn_pinned returns op_pin_state_floats and the graph the
+ * node belongs to is in state op_poin_state_floats then this function
+ * returns 'floats', else 'pinned'.
+ */
+op_pin_state is_irn_pinned_in_irg (const ir_node *node);
+
 /**
  * irnode constructor.
  * Create a new irnode in irg, with an op, mode, arity and

ir/ir/irnode_t.h

@@ -497,19 +497,31 @@ _get_irn_link(const ir_node *node) {
 }
 
 /**
- * Returns the pinned state of a node.
+ * Returns whether the node _always_ must be pinned.
+ * I.e., the node is not floating after global cse.
+ *
  * Intern version of libFirm.
  */
 static INLINE op_pin_state
 _get_irn_pinned(const ir_node *node) {
   op_pin_state state;
   assert(node && _is_ir_node(node));
+  /* Check opcode */
   state = _get_op_pinned(_get_irn_op(node));
+
   if (state >= op_pin_state_exc_pinned)
     return get_opt_fragile_ops() ? node->attr.except.pin_state : op_pin_state_pinned;
   return state;
 }
 
+static INLINE op_pin_state
+_is_irn_pinned_in_irg(const ir_node *node) {
+  if (get_irg_pinned(get_irn_irg(node)) == op_pin_state_floats) {
+    return get_irn_pinned(node)
+  }
+  return op_pin_state_pinned;
+}
+
 static INLINE int
 _is_unop(const ir_node *node) {
   assert(node && _is_ir_node(node));
@@ -651,6 +663,8 @@ static INLINE type *_get_irn_type(ir_node *node) {
 #define irn_not_visited(node)                 _irn_not_visited(node)
 #define set_irn_link(node, link)              _set_irn_link(node, link)
 #define get_irn_link(node)                    _get_irn_link(node)
+#define get_irn_pinned(node)                  _get_irn_pinned(node)
+#define is_irn_pinned_in_irg(node)            _is_irn_pinned_in_irg(node)
 #define is_unop(node)                         _is_unop(node)
 #define is_binop(node)                        _is_binop(node)
 #define is_Const(node)                        _is_Const(node)