From: Luca Barbieri <luca@luca-barbieri.com>
Date: Mon, 6 Sep 2010 22:22:34 +0000 (+0200)
Subject: glsl: add ir_control_flow_visitor
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=55adbebc62a6a819a005adf48f367e7f378c7349;p=mesa.git

glsl: add ir_control_flow_visitor

This is just a subclass of ir_visitor with empty implementations of all
the visit methods for non-control flow nodes.

Used to avoid duplicating that in ir_visitor subclasses.

ir_hierarchical_visitor is another way to solve this, but is less natural
for some applications.
---

diff --git a/src/glsl/ir_visitor.h b/src/glsl/ir_visitor.h
index b87d7373180..7dd35fe1dc3 100644
--- a/src/glsl/ir_visitor.h
+++ b/src/glsl/ir_visitor.h
@@ -64,4 +64,21 @@ public:
    /*@}*/
 };
 
+/* NOTE: function calls may never return due to discards inside them
+ * This is usually not an issue, but if it is, keep it in mind
+ */
+class ir_control_flow_visitor : public ir_visitor {
+public:
+   virtual void visit(class ir_variable *) {}
+   virtual void visit(class ir_expression *) {}
+   virtual void visit(class ir_texture *) {}
+   virtual void visit(class ir_swizzle *) {}
+   virtual void visit(class ir_dereference_variable *) {}
+   virtual void visit(class ir_dereference_array *) {}
+   virtual void visit(class ir_dereference_record *) {}
+   virtual void visit(class ir_assignment *) {}
+   virtual void visit(class ir_constant *) {}
+   virtual void visit(class ir_call *) {}
+};
+
 #endif /* IR_VISITOR_H */