factorize upper_bits_clean and use in sparc+ia32

[libfirm] / ir / be / betranshlp.h

diff --git a/ir/be/betranshlp.h b/ir/be/betranshlp.h
index 630636a..96a9c04 100644 (file)
--- a/ir/be/betranshlp.h
+++ b/ir/be/betranshlp.h
@@ -22,7 +22,6 @@
  * @brief       be transform helper extracted from the ia32 backend.
  * @author      Matthias Braun, Michael Beck
  * @date        14.06.2007
- * @version     $Id$
  */
 #ifndef FIRM_BE_BETRANSHLP_H
 #define FIRM_BE_BETRANSHLP_H
@@ -58,6 +57,13 @@ void be_duplicate_deps(ir_node *old_node, ir_node *new_node);
  */
 ir_node *be_duplicate_node(ir_node *node);
 
+/** clear transform functions and sets some virtual nodes like
+ * Start, Sync, Pin to the duplication transformer */
+void be_start_transform_setup(void);
+
+/** register a transform function for a specific node type */
+void be_set_transform_function(ir_op *op, be_transform_func func);
+
 /**
  * Associate an old node with a transformed node. Uses link field.
  */
@@ -76,6 +82,22 @@ void be_enqueue_preds(ir_node *node);
 /**
  * Transform a graph. Transformers must be registered first.
  */
-void be_transform_graph(be_irg_t *birg, arch_pretrans_nodes *func);
+void be_transform_graph(ir_graph *irg, arch_pretrans_nodes *func);
+
+typedef bool (*upper_bits_clean_func)(const ir_node *node, ir_mode *mode);
+
+/**
+ * register a test function for be_upper_bits_clean for a specific node
+ * type.
+ */
+void be_set_upper_bits_clean_function(ir_op *op, upper_bits_clean_func func);
+
+/**
+ * returns true if it is assured, that the upper bits of a node are "clean"
+ * which means for a 16 or 8 bit value, that the upper bits in the register
+ * are 0 for unsigned and a copy of the last significant bit for signed
+ * numbers.
+ */
+bool be_upper_bits_clean(const ir_node *node, ir_mode *mode);
 
-#endif /* FIRM_BE_BETRANSHLP_H */
+#endif