1 /*
2  * Copyright © 2010 Intel Corporation
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice (including the next
12  * paragraph) shall be included in all copies or substantial portions of the
13  * Software.
14  *
15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21  * DEALINGS IN THE SOFTWARE.
22  */
23 
24 /**
25  * \file ir_rvalue_visitor.h
26  *
27  * Generic class to implement the common pattern we have of wanting to
28  * visit each ir_rvalue * and possibly change that node to a different
29  * class.  Just implement handle_rvalue() and you will be called with
30  * a pointer to each rvalue in the tree.
31  */
32 
33 class ir_rvalue_base_visitor : public ir_hierarchical_visitor {
34 public:
35    ir_visitor_status rvalue_visit(ir_assignment *);
36    ir_visitor_status rvalue_visit(ir_call *);
37    ir_visitor_status rvalue_visit(ir_dereference_array *);
38    ir_visitor_status rvalue_visit(ir_dereference_record *);
39    ir_visitor_status rvalue_visit(ir_expression *);
40    ir_visitor_status rvalue_visit(ir_if *);
41    ir_visitor_status rvalue_visit(ir_return *);
42    ir_visitor_status rvalue_visit(ir_swizzle *);
43    ir_visitor_status rvalue_visit(ir_texture *);
44 
45    virtual void handle_rvalue(ir_rvalue **rvalue) = 0;
46 };
47 
48 class ir_rvalue_visitor : public ir_rvalue_base_visitor {
49 public:
50 
51    virtual ir_visitor_status visit_leave(ir_assignment *);
52    virtual ir_visitor_status visit_leave(ir_call *);
53    virtual ir_visitor_status visit_leave(ir_dereference_array *);
54    virtual ir_visitor_status visit_leave(ir_dereference_record *);
55    virtual ir_visitor_status visit_leave(ir_expression *);
56    virtual ir_visitor_status visit_leave(ir_if *);
57    virtual ir_visitor_status visit_leave(ir_return *);
58    virtual ir_visitor_status visit_leave(ir_swizzle *);
59    virtual ir_visitor_status visit_leave(ir_texture *);
60 };
61 
62 class ir_rvalue_enter_visitor : public ir_rvalue_base_visitor {
63 public:
64 
65    virtual ir_visitor_status visit_enter(ir_assignment *);
66    virtual ir_visitor_status visit_enter(ir_call *);
67    virtual ir_visitor_status visit_enter(ir_dereference_array *);
68    virtual ir_visitor_status visit_enter(ir_dereference_record *);
69    virtual ir_visitor_status visit_enter(ir_expression *);
70    virtual ir_visitor_status visit_enter(ir_if *);
71    virtual ir_visitor_status visit_enter(ir_return *);
72    virtual ir_visitor_status visit_enter(ir_swizzle *);
73    virtual ir_visitor_status visit_enter(ir_texture *);
74 };
75