text: // Copyright 1998-2017 Epic Games, Inc. All Rights Reserved.
  
  // This code is modified from that in the Mesa3D Graphics library available at
  // http://mesa3d.org/
  // The license for the original code follows:
  
  /*
   * Copyright © 2010 Intel Corporation
   *
   * Permission is hereby granted, free of charge, to any person obtaining a
   * copy of this software and associated documentation files (the "Software"),
   * to deal in the Software without restriction, including without limitation
   * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   * and/or sell copies of the Software, and to permit persons to whom the
   * Software is furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice (including the next
   * paragraph) shall be included in all copies or substantial portions of the
   * Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
   * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
   * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
   * DEALINGS IN THE SOFTWARE.
   */
  
  #include "ir.h"
  #include "ir_visitor.h"
  
  class ir_struct_usage_visitor : public ir_hierarchical_visitor {
  public:
  	ir_struct_usage_visitor();
  	~ir_struct_usage_visitor(void);
  
  	virtual ir_visitor_status visit(ir_dereference_variable *);
  
  	void add_type(const glsl_type *t);
  	bool has_struct_entry(const glsl_type *t) const;
  
  	exec_list struct_list;
  	void *mem_ctx;
  };
  