X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=include%2Flibfirm%2Flowering.h;h=f54ce72c0e0bc2ef6e9dac46a3d298c948d0ee04;hb=94f6c873ed355ad4480e62d1b3aa47899148c436;hp=51cf0eef3ee9b347c0e7b4b6ca1b493ea0082bc4;hpb=c06a58401a4cde698aa098d52321ad9ed6f96563;p=libfirm

diff --git a/include/libfirm/lowering.h b/include/libfirm/lowering.h
index 51cf0eef3..f54ce72c0 100644
--- a/include/libfirm/lowering.h
+++ b/include/libfirm/lowering.h
@@ -254,8 +254,8 @@ ir_graph_pass_t *lower_highlevel_graph_pass(const char *name, int lower_bitfield
  * Handle bit fields by added And/Or calculations.
  * Lowers all graphs.
  *
- * @Note: There is NO lowering of objects oriented types. This is highly compiler
- *        and ABI specific and should be placed directly in the compiler.
+ * @note There is NO lowering of objects oriented types. This is highly compiler
+ *       and ABI specific and should be placed directly in the compiler.
  */
 void lower_highlevel(int lower_bitfields);
 
@@ -305,6 +305,37 @@ void ir_lower_mode_b(ir_graph *irg, const lower_mode_b_config_t *config);
 ir_graph_pass_t *ir_lower_mode_b_pass(
 	const char *name, const lower_mode_b_config_t *config);
 
+/**
+ * Used as callback, whenever a lowerable mux is found. The return value
+ * indicates, whether the mux should be lowered. This may be used, to lower
+ * floating point muxes, while keeping mux nodes for integers, for example.
+ *
+ * @param mux  The mux node that may be lowered.
+ * @return     A non-zero value indicates that the mux should be lowered.
+ */
+typedef int lower_mux_callback(ir_node* mux);
+
+/**
+ * Lowers all mux nodes in the given graph. A callback function may be
+ * given, to select the mux nodes to lower.
+ *
+ * @param irg      The graph to lower mux nodes in.
+ * @param cb_func  The callback function for mux selection. Can be NULL,
+ *                 to lower all mux nodes.
+ */
+void lower_mux(ir_graph *irg, lower_mux_callback *cb_func);
+
+/**
+ * Creates an ir_graph pass for lower_mux().
+ *
+ * @param name     the name of this pass or NULL
+ * @param cb_func  The callback function for mux selection. Can be NULL,
+ *                 to lower all mux nodes.
+ *
+ * @return  the newly created ir_graph pass
+ */
+ir_graph_pass_t *lower_mux_pass(const char *name, lower_mux_callback *cb_func);
+
 /**
  * An intrinsic mapper function.
  *