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1901 | serge | 1 | /* |
2 | * Copyright © 2010 Intel Corporation |
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3 | * |
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4 | * Permission is hereby granted, free of charge, to any person obtaining a |
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5 | * copy of this software and associated documentation files (the "Software"), |
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6 | * to deal in the Software without restriction, including without limitation |
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7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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8 | * and/or sell copies of the Software, and to permit persons to whom the |
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9 | * Software is furnished to do so, subject to the following conditions: |
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10 | * |
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11 | * The above copyright notice and this permission notice (including the next |
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12 | * paragraph) shall be included in all copies or substantial portions of the |
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13 | * Software. |
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14 | * |
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15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
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20 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
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21 | * DEALINGS IN THE SOFTWARE. |
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22 | */ |
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23 | |||
24 | /** |
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25 | * \file ir_import_prototypes.cpp |
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26 | * Import function prototypes from one IR tree into another. |
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27 | * |
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28 | * \author Ian Romanick |
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29 | */ |
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30 | #include |
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31 | #include "ir.h" |
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32 | #include "glsl_symbol_table.h" |
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33 | |||
34 | /** |
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35 | * Visitor used to import function prototypes |
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36 | * |
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37 | * Normally the \c clone method of either \c ir_function or |
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38 | * \c ir_function_signature could be used. However, we don't want a complete |
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39 | * clone of the \c ir_function_signature. We want everything \b except the |
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40 | * body of the function. |
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41 | */ |
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42 | class import_prototype_visitor : public ir_hierarchical_visitor { |
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43 | public: |
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44 | /** |
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45 | */ |
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46 | import_prototype_visitor(exec_list *list, glsl_symbol_table *symbols, |
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47 | void *mem_ctx) |
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48 | { |
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49 | this->mem_ctx = mem_ctx; |
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50 | this->list = list; |
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51 | this->symbols = symbols; |
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52 | this->function = NULL; |
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53 | } |
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54 | |||
55 | virtual ir_visitor_status visit_enter(ir_function *ir) |
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56 | { |
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57 | assert(this->function == NULL); |
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58 | |||
59 | this->function = this->symbols->get_function(ir->name); |
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60 | if (!this->function) { |
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61 | this->function = new(this->mem_ctx) ir_function(ir->name); |
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62 | |||
63 | list->push_tail(this->function); |
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64 | |||
65 | /* Add the new function to the symbol table. |
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66 | */ |
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67 | this->symbols->add_function(this->function); |
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68 | } |
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69 | return visit_continue; |
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70 | } |
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71 | |||
72 | virtual ir_visitor_status visit_leave(ir_function *ir) |
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73 | { |
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74 | (void) ir; |
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75 | assert(this->function != NULL); |
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76 | |||
77 | this->function = NULL; |
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78 | return visit_continue; |
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79 | } |
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80 | |||
81 | ir_visitor_status visit_enter(ir_function_signature *ir) |
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82 | { |
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83 | assert(this->function != NULL); |
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84 | |||
85 | ir_function_signature *copy = ir->clone_prototype(mem_ctx, NULL); |
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86 | |||
87 | this->function->add_signature(copy); |
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88 | |||
89 | /* Do not process child nodes of the ir_function_signature. There can |
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90 | * never be any nodes inside the ir_function_signature that we care |
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91 | * about. Instead continue with the next sibling. |
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92 | */ |
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93 | return visit_continue_with_parent; |
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94 | } |
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95 | |||
96 | private: |
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97 | exec_list *list; |
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98 | ir_function *function; |
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99 | glsl_symbol_table *symbols; |
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100 | void *mem_ctx; |
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101 | }; |
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102 | |||
103 | |||
104 | /** |
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105 | * Import function prototypes from one IR tree into another |
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106 | * |
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107 | * \param source Source instruction stream containing functions whose |
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108 | * prototypes are to be imported |
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109 | * \param dest Destination instruction stream where new \c ir_function and |
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110 | * \c ir_function_signature nodes will be stored |
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111 | * \param symbols Symbol table where new functions will be stored |
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112 | * \param mem_ctx ralloc memory context used for new allocations |
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113 | */ |
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114 | void |
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115 | import_prototypes(const exec_list *source, exec_list *dest, |
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116 | glsl_symbol_table *symbols, void *mem_ctx) |
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117 | { |
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118 | import_prototype_visitor v(dest, symbols, mem_ctx); |
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119 | |||
120 | /* Making source be const is just extra documentation. |
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121 | */ |
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122 | v.run(const_cast |
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123 | } |