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 <cstdio> 31 #include "ir.h" 32 #include "glsl_symbol_table.h" 33 34 /** 35 * Visitor used to import function prototypes 36 * 37 * Normally the \c clone method of either \c ir_function or 38 * \c ir_function_signature could be used. However, we don't want a complete 39 * clone of the \c ir_function_signature. We want everything \b except the 40 * body of the function. 41 */ 42 class import_prototype_visitor : public ir_hierarchical_visitor { 43 public: 44 /** 45 */ 46 import_prototype_visitor(exec_list *list, glsl_symbol_table *symbols, 47 void *mem_ctx) 48 { 49 this->mem_ctx = mem_ctx; 50 this->list = list; 51 this->symbols = symbols; 52 this->function = NULL; 53 } 54 55 virtual ir_visitor_status visit_enter(ir_function *ir) 56 { 57 assert(this->function == NULL); 58 59 this->function = this->symbols->get_function(ir->name); 60 if (!this->function) { 61 this->function = new(this->mem_ctx) ir_function(ir->name); 62 63 list->push_tail(this->function); 64 65 /* Add the new function to the symbol table. 66 */ 67 this->symbols->add_function(this->function); 68 } 69 return visit_continue; 70 } 71 72 virtual ir_visitor_status visit_leave(ir_function *ir) 73 { 74 (void) ir; 75 assert(this->function != NULL); 76 77 this->function = NULL; 78 return visit_continue; 79 } 80 81 ir_visitor_status visit_enter(ir_function_signature *ir) 82 { 83 assert(this->function != NULL); 84 85 ir_function_signature *copy = ir->clone_prototype(mem_ctx, NULL); 86 87 this->function->add_signature(copy); 88 89 /* Do not process child nodes of the ir_function_signature. There can 90 * never be any nodes inside the ir_function_signature that we care 91 * about. Instead continue with the next sibling. 92 */ 93 return visit_continue_with_parent; 94 } 95 96 private: 97 exec_list *list; 98 ir_function *function; 99 glsl_symbol_table *symbols; 100 void *mem_ctx; 101 }; 102 103 104 /** 105 * Import function prototypes from one IR tree into another 106 * 107 * \param source Source instruction stream containing functions whose 108 * prototypes are to be imported 109 * \param dest Destination instruction stream where new \c ir_function and 110 * \c ir_function_signature nodes will be stored 111 * \param symbols Symbol table where new functions will be stored 112 * \param mem_ctx hieralloc memory context used for new allocations 113 */ 114 void 115 import_prototypes(const exec_list *source, exec_list *dest, 116 glsl_symbol_table *symbols, void *mem_ctx) 117 { 118 import_prototype_visitor v(dest, symbols, mem_ctx); 119 120 /* Making source be const is just extra documentation. 121 */ 122 v.run(const_cast<exec_list *>(source)); 123 } 124
