• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
1 /* -*- c++ -*- */
2 /*
3  * Copyright © 2010 Intel Corporation
4  *
5  * Permission is hereby granted, free of charge, to any person obtaining a
6  * copy of this software and associated documentation files (the "Software"),
7  * to deal in the Software without restriction, including without limitation
8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9  * and/or sell copies of the Software, and to permit persons to whom the
10  * Software is furnished to do so, subject to the following conditions:
11  *
12  * The above copyright notice and this permission notice (including the next
13  * paragraph) shall be included in all copies or substantial portions of the
14  * Software.
15  *
16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22  * DEALINGS IN THE SOFTWARE.
23  */
24 
25 #pragma once
26 #ifndef IR_VISITOR_H
27 #define IR_VISITOR_H
28 
29 /**
30  * Abstract base class of visitors of IR instruction trees
31  */
32 class ir_visitor {
33 public:
~ir_visitor()34    virtual ~ir_visitor()
35    {
36       /* empty */
37    }
38 
39    /**
40     * \name Visit methods
41     *
42     * As typical for the visitor pattern, there must be one \c visit method for
43     * each concrete subclass of \c ir_instruction.  Virtual base classes within
44     * the hierarchy should not have \c visit methods.
45     */
46    /*@{*/
visit(class ir_rvalue *)47    virtual void visit(class ir_rvalue *) { assert(!"unhandled error_type"); }
48    virtual void visit(class ir_variable *) = 0;
49    virtual void visit(class ir_function_signature *) = 0;
50    virtual void visit(class ir_function *) = 0;
51    virtual void visit(class ir_expression *) = 0;
52    virtual void visit(class ir_texture *) = 0;
53    virtual void visit(class ir_swizzle *) = 0;
54    virtual void visit(class ir_dereference_variable *) = 0;
55    virtual void visit(class ir_dereference_array *) = 0;
56    virtual void visit(class ir_dereference_record *) = 0;
57    virtual void visit(class ir_assignment *) = 0;
58    virtual void visit(class ir_constant *) = 0;
59    virtual void visit(class ir_call *) = 0;
60    virtual void visit(class ir_return *) = 0;
61    virtual void visit(class ir_discard *) = 0;
62    virtual void visit(class ir_if *) = 0;
63    virtual void visit(class ir_loop *) = 0;
64    virtual void visit(class ir_loop_jump *) = 0;
65    /*@}*/
66 };
67 
68 /* NOTE: function calls may never return due to discards inside them
69  * This is usually not an issue, but if it is, keep it in mind
70  */
71 class ir_control_flow_visitor : public ir_visitor {
72 public:
visit(class ir_variable *)73    virtual void visit(class ir_variable *) {}
visit(class ir_expression *)74    virtual void visit(class ir_expression *) {}
visit(class ir_texture *)75    virtual void visit(class ir_texture *) {}
visit(class ir_swizzle *)76    virtual void visit(class ir_swizzle *) {}
visit(class ir_dereference_variable *)77    virtual void visit(class ir_dereference_variable *) {}
visit(class ir_dereference_array *)78    virtual void visit(class ir_dereference_array *) {}
visit(class ir_dereference_record *)79    virtual void visit(class ir_dereference_record *) {}
visit(class ir_assignment *)80    virtual void visit(class ir_assignment *) {}
visit(class ir_constant *)81    virtual void visit(class ir_constant *) {}
visit(class ir_call *)82    virtual void visit(class ir_call *) {}
83 };
84 
85 #endif /* IR_VISITOR_H */
86