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_import_prototypes.cpp 26 * Import function prototypes from one IR tree into another. 27 * 28 * \author Ian Romanick 29 */ 30 #include "ir.h" 31 #include "glsl_symbol_table.h" 32 33 /** 34 * Visitor used to import function prototypes 35 * 36 * Normally the \c clone method of either \c ir_function or 37 * \c ir_function_signature could be used. However, we don't want a complete 38 * clone of the \c ir_function_signature. We want everything \b except the 39 * body of the function. 40 */ 41 class import_prototype_visitor : public ir_hierarchical_visitor { 42 public: 43 /** 44 */ 45 import_prototype_visitor(exec_list *list, glsl_symbol_table *symbols, 46 void *mem_ctx) 47 { 48 this->mem_ctx = mem_ctx; 49 this->list = list; 50 this->symbols = symbols; 51 this->function = NULL; 52 } 53 54 virtual ir_visitor_status visit_enter(ir_function *ir) 55 { 56 assert(this->function == NULL); 57 58 this->function = this->symbols->get_function(ir->name); 59 if (!this->function) { 60 this->function = new(this->mem_ctx) ir_function(ir->name); 61 62 list->push_tail(this->function); 63 64 /* Add the new function to the symbol table. 65 */ 66 this->symbols->add_function(this->function); 67 } 68 return visit_continue; 69 } 70 71 virtual ir_visitor_status visit_leave(ir_function *ir) 72 { 73 (void) ir; 74 assert(this->function != NULL); 75 76 this->function = NULL; 77 return visit_continue; 78 } 79 80 ir_visitor_status visit_enter(ir_function_signature *ir) 81 { 82 assert(this->function != NULL); 83 84 ir_function_signature *copy = ir->clone_prototype(mem_ctx, NULL); 85 86 this->function->add_signature(copy); 87 88 /* Do not process child nodes of the ir_function_signature. There can 89 * never be any nodes inside the ir_function_signature that we care 90 * about. Instead continue with the next sibling. 91 */ 92 return visit_continue_with_parent; 93 } 94 95 private: 96 exec_list *list; 97 ir_function *function; 98 glsl_symbol_table *symbols; 99 void *mem_ctx; 100 }; 101 102 103 /** 104 * Import function prototypes from one IR tree into another 105 * 106 * \param source Source instruction stream containing functions whose 107 * prototypes are to be imported 108 * \param dest Destination instruction stream where new \c ir_function and 109 * \c ir_function_signature nodes will be stored 110 * \param symbols Symbol table where new functions will be stored 111 * \param mem_ctx ralloc memory context used for new allocations 112 */ 113 void 114 import_prototypes(const exec_list *source, exec_list *dest, 115 glsl_symbol_table *symbols, void *mem_ctx) 116 { 117 import_prototype_visitor v(dest, symbols, mem_ctx); 118 119 /* Making source be const is just extra documentation. 120 */ 121 v.run(const_cast<exec_list *>(source)); 122 } 123
