workbench/libs/mesa/src/glsl/ir_hv_accept.cpp

   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 #include "ir.h"
  25
  26 /**
  27  * \file ir_hv_accept.cpp
  28  * Implementations of all hierarchical visitor accept methods for IR
  29  * instructions.
  30  */
  31
  32 /**
  33  * Process a list of nodes using a hierarchical vistor
  34  *
  35  * \warning
  36  * This function will operate correctly if a node being processed is removed
  37  * from the list.  However, if nodes are added to the list after the node being
  38  * processed, some of the added nodes may not be processed.
  39  */
  40 ir_visitor_status
  41 visit_list_elements(ir_hierarchical_visitor *v, exec_list *l)
  42 {
  43    ir_instruction *prev_base_ir = v->base_ir;
  44
  45    foreach_list_safe(n, l) {
  46       ir_instruction *const ir = (ir_instruction *) n;
  47       v->base_ir = ir;
  48       ir_visitor_status s = ir->accept(v);
  49
  50       if (s != visit_continue)
  51          return s;
  52    }
  53    v->base_ir = prev_base_ir;
  54
  55    return visit_continue;
  56 }
  57
  58
  59 ir_visitor_status
  60 ir_variable::accept(ir_hierarchical_visitor *v)
  61 {
  62    return v->visit(this);
  63 }
  64
  65
  66 ir_visitor_status
  67 ir_loop::accept(ir_hierarchical_visitor *v)
  68 {
  69    ir_visitor_status s = v->visit_enter(this);
  70
  71    if (s != visit_continue)
  72       return (s == visit_continue_with_parent) ? visit_continue : s;
  73
  74    s = visit_list_elements(v, &this->body_instructions);
  75    if (s == visit_stop)
  76       return s;
  77
  78    if (s != visit_continue_with_parent) {
  79       if (this->from) {
  80          s = this->from->accept(v);
  81          if (s != visit_continue)
  82             return (s == visit_continue_with_parent) ? visit_continue : s;
  83       }
  84
  85       if (this->to) {
  86          s = this->to->accept(v);
  87          if (s != visit_continue)
  88             return (s == visit_continue_with_parent) ? visit_continue : s;
  89       }
  90
  91       if (this->increment) {
  92          s = this->increment->accept(v);
  93          if (s != visit_continue)
  94             return (s == visit_continue_with_parent) ? visit_continue : s;
  95       }
  96    }
  97
  98    return v->visit_leave(this);
  99 }
 100
 101
 102 ir_visitor_status
 103 ir_loop_jump::accept(ir_hierarchical_visitor *v)
 104 {
 105    return v->visit(this);
 106 }
 107
 108
 109 ir_visitor_status
 110 ir_function_signature::accept(ir_hierarchical_visitor *v)
 111 {
 112    ir_visitor_status s = v->visit_enter(this);
 113    if (s != visit_continue)
 114       return (s == visit_continue_with_parent) ? visit_continue : s;
 115
 116    s = visit_list_elements(v, &this->parameters);
 117    if (s == visit_stop)
 118       return s;
 119
 120    s = visit_list_elements(v, &this->body);
 121    return (s == visit_stop) ? s : v->visit_leave(this);
 122 }
 123
 124
 125 ir_visitor_status
 126 ir_function::accept(ir_hierarchical_visitor *v)
 127 {
 128    ir_visitor_status s = v->visit_enter(this);
 129    if (s != visit_continue)
 130       return (s == visit_continue_with_parent) ? visit_continue : s;
 131
 132    s = visit_list_elements(v, &this->signatures);
 133    return (s == visit_stop) ? s : v->visit_leave(this);
 134 }
 135
 136
 137 ir_visitor_status
 138 ir_expression::accept(ir_hierarchical_visitor *v)
 139 {
 140    ir_visitor_status s = v->visit_enter(this);
 141
 142    if (s != visit_continue)
 143       return (s == visit_continue_with_parent) ? visit_continue : s;
 144
 145    for (unsigned i = 0; i < this->get_num_operands(); i++) {
 146       switch (this->operands[i]->accept(v)) {
 147       case visit_continue:
 148          break;
 149
 150       case visit_continue_with_parent:
 151          // I wish for Java's labeled break-statement here.
 152          goto done;
 153
 154       case visit_stop:
 155          return s;
 156       }
 157    }
 158
 159 done:
 160    return v->visit_leave(this);
 161 }
 162
 163 ir_visitor_status
 164 ir_texture::accept(ir_hierarchical_visitor *v)
 165 {
 166    ir_visitor_status s = v->visit_enter(this);
 167    if (s != visit_continue)
 168       return (s == visit_continue_with_parent) ? visit_continue : s;
 169
 170    s = this->sampler->accept(v);
 171    if (s != visit_continue)
 172       return (s == visit_continue_with_parent) ? visit_continue : s;
 173
 174    s = this->coordinate->accept(v);
 175    if (s != visit_continue)
 176       return (s == visit_continue_with_parent) ? visit_continue : s;
 177
 178    if (this->projector) {
 179       s = this->projector->accept(v);
 180       if (s != visit_continue)
 181          return (s == visit_continue_with_parent) ? visit_continue : s;
 182    }
 183
 184    if (this->shadow_comparitor) {
 185       s = this->shadow_comparitor->accept(v);
 186       if (s != visit_continue)
 187          return (s == visit_continue_with_parent) ? visit_continue : s;
 188    }
 189
 190    if (this->offset) {
 191       s = this->offset->accept(v);
 192       if (s != visit_continue)
 193          return (s == visit_continue_with_parent) ? visit_continue : s;
 194    }
 195
 196    switch (this->op) {
 197    case ir_tex:
 198       break;
 199    case ir_txb:
 200       s = this->lod_info.bias->accept(v);
 201       if (s != visit_continue)
 202          return (s == visit_continue_with_parent) ? visit_continue : s;
 203       break;
 204    case ir_txl:
 205    case ir_txf:
 206       s = this->lod_info.lod->accept(v);
 207       if (s != visit_continue)
 208          return (s == visit_continue_with_parent) ? visit_continue : s;
 209       break;
 210    case ir_txd:
 211       s = this->lod_info.grad.dPdx->accept(v);
 212       if (s != visit_continue)
 213          return (s == visit_continue_with_parent) ? visit_continue : s;
 214
 215       s = this->lod_info.grad.dPdy->accept(v);
 216       if (s != visit_continue)
 217          return (s == visit_continue_with_parent) ? visit_continue : s;
 218       break;
 219    }
 220
 221    return (s == visit_stop) ? s : v->visit_leave(this);
 222 }
 223
 224
 225 ir_visitor_status
 226 ir_swizzle::accept(ir_hierarchical_visitor *v)
 227 {
 228    ir_visitor_status s = v->visit_enter(this);
 229    if (s != visit_continue)
 230       return (s == visit_continue_with_parent) ? visit_continue : s;
 231
 232    s = this->val->accept(v);
 233    return (s == visit_stop) ? s : v->visit_leave(this);
 234 }
 235
 236
 237 ir_visitor_status
 238 ir_dereference_variable::accept(ir_hierarchical_visitor *v)
 239 {
 240    return v->visit(this);
 241 }
 242
 243
 244 ir_visitor_status
 245 ir_dereference_array::accept(ir_hierarchical_visitor *v)
 246 {
 247    ir_visitor_status s = v->visit_enter(this);
 248    if (s != visit_continue)
 249       return (s == visit_continue_with_parent) ? visit_continue : s;
 250
 251    /* The array index is not the target of the assignment, so clear the
 252     * 'in_assignee' flag.  Restore it after returning from the array index.
 253     */
 254    const bool was_in_assignee = v->in_assignee;
 255    v->in_assignee = false;
 256    s = this->array_index->accept(v);
 257    v->in_assignee = was_in_assignee;
 258
 259    if (s != visit_continue)
 260       return (s == visit_continue_with_parent) ? visit_continue : s;
 261
 262    s = this->array->accept(v);
 263    return (s == visit_stop) ? s : v->visit_leave(this);
 264 }
 265
 266
 267 ir_visitor_status
 268 ir_dereference_record::accept(ir_hierarchical_visitor *v)
 269 {
 270    ir_visitor_status s = v->visit_enter(this);
 271    if (s != visit_continue)
 272       return (s == visit_continue_with_parent) ? visit_continue : s;
 273
 274    s = this->record->accept(v);
 275    return (s == visit_stop) ? s : v->visit_leave(this);
 276 }
 277
 278
 279 ir_visitor_status
 280 ir_assignment::accept(ir_hierarchical_visitor *v)
 281 {
 282    ir_visitor_status s = v->visit_enter(this);
 283    if (s != visit_continue)
 284       return (s == visit_continue_with_parent) ? visit_continue : s;
 285
 286    v->in_assignee = true;
 287    s = this->lhs->accept(v);
 288    v->in_assignee = false;
 289    if (s != visit_continue)
 290       return (s == visit_continue_with_parent) ? visit_continue : s;
 291
 292    s = this->rhs->accept(v);
 293    if (s != visit_continue)
 294       return (s == visit_continue_with_parent) ? visit_continue : s;
 295
 296    if (this->condition)
 297       s = this->condition->accept(v);
 298
 299    return (s == visit_stop) ? s : v->visit_leave(this);
 300 }
 301
 302
 303 ir_visitor_status
 304 ir_constant::accept(ir_hierarchical_visitor *v)
 305 {
 306    return v->visit(this);
 307 }
 308
 309
 310 ir_visitor_status
 311 ir_call::accept(ir_hierarchical_visitor *v)
 312 {
 313    ir_visitor_status s = v->visit_enter(this);
 314    if (s != visit_continue)
 315       return (s == visit_continue_with_parent) ? visit_continue : s;
 316
 317    s = visit_list_elements(v, &this->actual_parameters);
 318    if (s == visit_stop)
 319       return s;
 320
 321    return v->visit_leave(this);
 322 }
 323
 324
 325 ir_visitor_status
 326 ir_return::accept(ir_hierarchical_visitor *v)
 327 {
 328    ir_visitor_status s = v->visit_enter(this);
 329    if (s != visit_continue)
 330       return (s == visit_continue_with_parent) ? visit_continue : s;
 331
 332    ir_rvalue *val = this->get_value();
 333    if (val) {
 334       s = val->accept(v);
 335       if (s != visit_continue)
 336          return (s == visit_continue_with_parent) ? visit_continue : s;
 337    }
 338
 339    return v->visit_leave(this);
 340 }
 341
 342
 343 ir_visitor_status
 344 ir_discard::accept(ir_hierarchical_visitor *v)
 345 {
 346    ir_visitor_status s = v->visit_enter(this);
 347    if (s != visit_continue)
 348       return (s == visit_continue_with_parent) ? visit_continue : s;
 349
 350    if (this->condition != NULL) {
 351       s = this->condition->accept(v);
 352       if (s != visit_continue)
 353          return (s == visit_continue_with_parent) ? visit_continue : s;
 354    }
 355
 356    return v->visit_leave(this);
 357 }
 358
 359
 360 ir_visitor_status
 361 ir_if::accept(ir_hierarchical_visitor *v)
 362 {
 363    ir_visitor_status s = v->visit_enter(this);
 364    if (s != visit_continue)
 365       return (s == visit_continue_with_parent) ? visit_continue : s;
 366
 367    s = this->condition->accept(v);
 368    if (s != visit_continue)
 369       return (s == visit_continue_with_parent) ? visit_continue : s;
 370
 371    if (s != visit_continue_with_parent) {
 372       s = visit_list_elements(v, &this->then_instructions);
 373       if (s == visit_stop)
 374          return s;
 375    }
 376
 377    if (s != visit_continue_with_parent) {
 378       s = visit_list_elements(v, &this->else_instructions);
 379       if (s == visit_stop)
 380          return s;
 381    }
 382
 383    return v->visit_leave(this);
 384 }