Cycles: Remove old nasty workaround

It used to be used for some sort of ignoring automatically
generated bump nodes. But nowadays it causes one of the shaders
in Classroom demo file to be compiled wrong.

intern/cycles/render/svm.cpp

@@ -411,31 +411,20 @@ uint SVMCompiler::attribute_standard(ustring name)
 	return (std)? attribute(std): attribute(name);
 }
 
-bool SVMCompiler::node_skip_input(ShaderNode * /*node*/, ShaderInput *input)
-{
-	/* nasty exception .. */
-	if(current_type == SHADER_TYPE_DISPLACEMENT && input->link && input->link->parent->special_type == SHADER_SPECIAL_TYPE_BUMP)
-		return true;
-
-	return false;
-}
-
 void SVMCompiler::find_dependencies(ShaderNodeSet& dependencies,
                                     const ShaderNodeSet& done,
                                     ShaderInput *input,
                                     ShaderNode *skip_node)
 {
 	ShaderNode *node = (input->link)? input->link->parent: NULL;
-
 	if(node != NULL &&
 	   done.find(node) == done.end() &&
 	   node != skip_node &&
 	   dependencies.find(node) == dependencies.end())
 	{
-		foreach(ShaderInput *in, node->inputs)
-			if(!node_skip_input(node, in))
-				find_dependencies(dependencies, done, in, skip_node);
-
+		foreach(ShaderInput *in, node->inputs) {
+			find_dependencies(dependencies, done, in, skip_node);
+		}
 		dependencies.insert(node);
 	}
 }
@@ -482,18 +471,19 @@ void SVMCompiler::generate_svm_nodes(const ShaderNodeSet& nodes,
 			if(!done_flag[node->id]) {
 				bool inputs_done = true;
 
-				foreach(ShaderInput *input, node->inputs)
-					if(!node_skip_input(node, input))
-						if(input->link && !done_flag[input->link->parent->id])
-							inputs_done = false;
-
+				foreach(ShaderInput *input, node->inputs) {
+					if(input->link && !done_flag[input->link->parent->id]) {
+						inputs_done = false;
+					}
+				}
 				if(inputs_done) {
 					generate_node(node, done);
 					done.insert(node);
 					done_flag[node->id] = true;
 				}
-				else
+				else {
 					nodes_done = false;
+				}
 			}
 		}
 	} while(!nodes_done);
@@ -504,7 +494,7 @@ void SVMCompiler::generate_closure_node(ShaderNode *node,
 {
 	/* execute dependencies for closure */
 	foreach(ShaderInput *in, node->inputs) {
-		if(!node_skip_input(node, in) && in->link) {
+		if(in->link != NULL) {
 			ShaderNodeSet dependencies;
 			find_dependencies(dependencies, state->nodes_done, in);
 			generate_svm_nodes(dependencies, state);

intern/cycles/render/svm.h

@@ -188,8 +188,6 @@ protected:
 	int stack_size(SocketType::Type type);
 	void stack_clear_users(ShaderNode *node, ShaderNodeSet& done);
 
-	bool node_skip_input(ShaderNode *node, ShaderInput *input);
-
 	/* single closure */
 	void find_dependencies(ShaderNodeSet& dependencies,
 	                       const ShaderNodeSet& done,