X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fbe%2Fbetranshlp.h;h=96a9c0464450df6a0a813af101f893f9665eb05f;hb=7f34faa1fcd5a4547f67ffb41c597921ea1d2d2f;hp=d91bae7f1985fdf5e6621dadc0e7259706116359;hpb=3f57d89fcb7055fc726a41aa63214aab97854cdf;p=libfirm

diff --git a/ir/be/betranshlp.h b/ir/be/betranshlp.h
index d91bae7f1..96a9c0464 100644
--- 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
@@ -53,12 +52,6 @@ ir_node *be_transform_node(ir_node *node);
  */
 void be_duplicate_deps(ir_node *old_node, ir_node *new_node);
 
-/**
- * Depend on the frame if the node is in the start block.  This prevents
- * nodes being scheduled before they can be spilled.
- */
-void be_dep_on_frame(ir_node *node);
-
 /**
  * Duplicate a node during transformation.
  */
@@ -91,12 +84,20 @@ void be_enqueue_preds(ir_node *node);
  */
 void be_transform_graph(ir_graph *irg, arch_pretrans_nodes *func);
 
+typedef bool (*upper_bits_clean_func)(const ir_node *node, ir_mode *mode);
+
 /**
- * If Mux(sel, t, f) represents an Abs return 1, if it represents -Abs return
- * -1, otherwise 0
+ * register a test function for be_upper_bits_clean for a specific node
+ * type.
  */
-int be_mux_is_abs(ir_node *sel, ir_node *mux_true, ir_node *mux_false);
+void be_set_upper_bits_clean_function(ir_op *op, upper_bits_clean_func func);
 
-ir_node *be_get_abs_op(ir_node *sel);
+/**
+ * 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