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 #include "glsl_symbol_table.h" 26 #include "ast.h" 27 28 class symbol_table_entry { 29 public: 30 DECLARE_LINEAR_ALLOC_CXX_OPERATORS(symbol_table_entry); 31 32 bool add_interface(const glsl_type *i, enum ir_variable_mode mode) 33 { 34 const glsl_type **dest; 35 36 switch (mode) { 37 case ir_var_uniform: 38 dest = &ibu; 39 break; 40 case ir_var_shader_storage: 41 dest = &iss; 42 break; 43 case ir_var_shader_in: 44 dest = &ibi; 45 break; 46 case ir_var_shader_out: 47 dest = &ibo; 48 break; 49 default: 50 assert(!"Unsupported interface variable mode!"); 51 return false; 52 } 53 54 if (*dest != NULL) { 55 return false; 56 } else { 57 *dest = i; 58 return true; 59 } 60 } 61 62 const glsl_type *get_interface(enum ir_variable_mode mode) 63 { 64 switch (mode) { 65 case ir_var_uniform: 66 return ibu; 67 case ir_var_shader_storage: 68 return iss; 69 case ir_var_shader_in: 70 return ibi; 71 case ir_var_shader_out: 72 return ibo; 73 default: 74 assert(!"Unsupported interface variable mode!"); 75 return NULL; 76 } 77 } 78 79 symbol_table_entry(ir_variable *v) : 80 v(v), f(0), t(0), ibu(0), iss(0), ibi(0), ibo(0), a(0) {} 81 symbol_table_entry(ir_function *f) : 82 v(0), f(f), t(0), ibu(0), iss(0), ibi(0), ibo(0), a(0) {} 83 symbol_table_entry(const glsl_type *t) : 84 v(0), f(0), t(t), ibu(0), iss(0), ibi(0), ibo(0), a(0) {} 85 symbol_table_entry(const glsl_type *t, enum ir_variable_mode mode) : 86 v(0), f(0), t(0), ibu(0), iss(0), ibi(0), ibo(0), a(0) 87 { 88 assert(t->is_interface()); 89 add_interface(t, mode); 90 } 91 symbol_table_entry(const class ast_type_specifier *a): 92 v(0), f(0), t(0), ibu(0), iss(0), ibi(0), ibo(0), a(a) {} 93 94 ir_variable *v; 95 ir_function *f; 96 const glsl_type *t; 97 const glsl_type *ibu; 98 const glsl_type *iss; 99 const glsl_type *ibi; 100 const glsl_type *ibo; 101 const class ast_type_specifier *a; 102 }; 103 104 glsl_symbol_table::glsl_symbol_table() 105 { 106 this->separate_function_namespace = false; 107 this->table = _mesa_symbol_table_ctor(); 108 this->mem_ctx = ralloc_context(NULL); 109 this->linalloc = linear_alloc_parent(this->mem_ctx, 0); 110 } 111 112 glsl_symbol_table::~glsl_symbol_table() 113 { 114 _mesa_symbol_table_dtor(table); 115 ralloc_free(mem_ctx); 116 } 117 118 void glsl_symbol_table::push_scope() 119 { 120 _mesa_symbol_table_push_scope(table); 121 } 122 123 void glsl_symbol_table::pop_scope() 124 { 125 _mesa_symbol_table_pop_scope(table); 126 } 127 128 bool glsl_symbol_table::name_declared_this_scope(const char *name) 129 { 130 return _mesa_symbol_table_symbol_scope(table, name) == 0; 131 } 132 133 bool glsl_symbol_table::add_variable(ir_variable *v) 134 { 135 assert(v->data.mode != ir_var_temporary); 136 137 if (this->separate_function_namespace) { 138 /* In 1.10, functions and variables have separate namespaces. */ 139 symbol_table_entry *existing = get_entry(v->name); 140 if (name_declared_this_scope(v->name)) { 141 /* If there's already an existing function (not a constructor!) in 142 * the current scope, just update the existing entry to include 'v'. 143 */ 144 if (existing->v == NULL && existing->t == NULL) { 145 existing->v = v; 146 return true; 147 } 148 } else { 149 /* If not declared at this scope, add a new entry. But if an existing 150 * entry includes a function, propagate that to this block - otherwise 151 * the new variable declaration would shadow the function. 152 */ 153 symbol_table_entry *entry = new(linalloc) symbol_table_entry(v); 154 if (existing != NULL) 155 entry->f = existing->f; 156 int added = _mesa_symbol_table_add_symbol(table, v->name, entry); 157 assert(added == 0); 158 (void)added; 159 return true; 160 } 161 return false; 162 } 163 164 /* 1.20+ rules: */ 165 symbol_table_entry *entry = new(linalloc) symbol_table_entry(v); 166 return _mesa_symbol_table_add_symbol(table, v->name, entry) == 0; 167 } 168 169 bool glsl_symbol_table::add_type(const char *name, const glsl_type *t) 170 { 171 symbol_table_entry *entry = new(linalloc) symbol_table_entry(t); 172 return _mesa_symbol_table_add_symbol(table, name, entry) == 0; 173 } 174 175 bool glsl_symbol_table::add_interface(const char *name, const glsl_type *i, 176 enum ir_variable_mode mode) 177 { 178 assert(i->is_interface()); 179 symbol_table_entry *entry = get_entry(name); 180 if (entry == NULL) { 181 symbol_table_entry *entry = 182 new(linalloc) symbol_table_entry(i, mode); 183 bool add_interface_symbol_result = 184 _mesa_symbol_table_add_symbol(table, name, entry) == 0; 185 assert(add_interface_symbol_result); 186 return add_interface_symbol_result; 187 } else { 188 return entry->add_interface(i, mode); 189 } 190 } 191 192 bool glsl_symbol_table::add_function(ir_function *f) 193 { 194 if (this->separate_function_namespace && name_declared_this_scope(f->name)) { 195 /* In 1.10, functions and variables have separate namespaces. */ 196 symbol_table_entry *existing = get_entry(f->name); 197 if ((existing->f == NULL) && (existing->t == NULL)) { 198 existing->f = f; 199 return true; 200 } 201 } 202 symbol_table_entry *entry = new(linalloc) symbol_table_entry(f); 203 return _mesa_symbol_table_add_symbol(table, f->name, entry) == 0; 204 } 205 206 bool glsl_symbol_table::add_default_precision_qualifier(const char *type_name, 207 int precision) 208 { 209 char *name = ralloc_asprintf(mem_ctx, "#default_precision_%s", type_name); 210 211 ast_type_specifier *default_specifier = new(linalloc) ast_type_specifier(name); 212 default_specifier->default_precision = precision; 213 214 symbol_table_entry *entry = 215 new(linalloc) symbol_table_entry(default_specifier); 216 217 if (!get_entry(name)) 218 return _mesa_symbol_table_add_symbol(table, name, entry) == 0; 219 220 return _mesa_symbol_table_replace_symbol(table, name, entry) == 0; 221 } 222 223 void glsl_symbol_table::add_global_function(ir_function *f) 224 { 225 symbol_table_entry *entry = new(linalloc) symbol_table_entry(f); 226 int added = _mesa_symbol_table_add_global_symbol(table, f->name, entry); 227 assert(added == 0); 228 (void)added; 229 } 230 231 ir_variable *glsl_symbol_table::get_variable(const char *name) 232 { 233 symbol_table_entry *entry = get_entry(name); 234 return entry != NULL ? entry->v : NULL; 235 } 236 237 const glsl_type *glsl_symbol_table::get_type(const char *name) 238 { 239 symbol_table_entry *entry = get_entry(name); 240 return entry != NULL ? entry->t : NULL; 241 } 242 243 const glsl_type *glsl_symbol_table::get_interface(const char *name, 244 enum ir_variable_mode mode) 245 { 246 symbol_table_entry *entry = get_entry(name); 247 return entry != NULL ? entry->get_interface(mode) : NULL; 248 } 249 250 ir_function *glsl_symbol_table::get_function(const char *name) 251 { 252 symbol_table_entry *entry = get_entry(name); 253 return entry != NULL ? entry->f : NULL; 254 } 255 256 int glsl_symbol_table::get_default_precision_qualifier(const char *type_name) 257 { 258 char *name = ralloc_asprintf(mem_ctx, "#default_precision_%s", type_name); 259 symbol_table_entry *entry = get_entry(name); 260 if (!entry) 261 return ast_precision_none; 262 return entry->a->default_precision; 263 } 264 265 symbol_table_entry *glsl_symbol_table::get_entry(const char *name) 266 { 267 return (symbol_table_entry *) 268 _mesa_symbol_table_find_symbol(table, name); 269 } 270 271 void 272 glsl_symbol_table::disable_variable(const char *name) 273 { 274 /* Ideally we would remove the variable's entry from the symbol table, but 275 * that would be difficult. Fortunately, since this is only used for 276 * built-in variables, it won't be possible for the shader to re-introduce 277 * the variable later, so all we really need to do is to make sure that 278 * further attempts to access it using get_variable() will return NULL. 279 */ 280 symbol_table_entry *entry = get_entry(name); 281 if (entry != NULL) { 282 entry->v = NULL; 283 } 284 } 285 286 void 287 glsl_symbol_table::replace_variable(const char *name, 288 ir_variable *v) 289 { 290 symbol_table_entry *entry = get_entry(name); 291 if (entry != NULL) { 292 entry->v = v; 293 } 294 } 295