src/glsl/ir_rvalue_visitor.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 /**
  25  * \file ir_rvalue_visitor.cpp
  26  *
  27  * Generic class to implement the common pattern we have of wanting to
  28  * visit each ir_rvalue * and possibly change that node to a different
  29  * class.
  30  */
  31
  32 #include "ir.h"
  33 #include "ir_visitor.h"
  34 #include "ir_rvalue_visitor.h"
  35 #include "ir_print_visitor.h"
  36 #include "glsl_types.h"
  37
  38 ir_visitor_status
  39 ir_rvalue_visitor::visit_leave(ir_expression *ir)
  40 {
  41    unsigned int operand;
  42
  43    for (operand = 0; operand < ir->get_num_operands(); operand++) {
  44       handle_rvalue(&ir->operands[operand]);
  45    }
  46
  47    return visit_continue;
  48 }
  49
  50 ir_visitor_status
  51 ir_rvalue_visitor::visit_leave(ir_texture *ir)
  52 {
  53    handle_rvalue(&ir->coordinate);
  54    handle_rvalue(&ir->projector);
  55    handle_rvalue(&ir->shadow_comparitor);
  56    handle_rvalue(&ir->offset);
  57
  58    switch (ir->op) {
  59    case ir_tex:
  60       break;
  61    case ir_txb:
  62       handle_rvalue(&ir->lod_info.bias);
  63       break;
  64    case ir_txf:
  65    case ir_txl:
  66    case ir_txs:
  67       handle_rvalue(&ir->lod_info.lod);
  68       break;
  69    case ir_txd:
  70       handle_rvalue(&ir->lod_info.grad.dPdx);
  71       handle_rvalue(&ir->lod_info.grad.dPdy);
  72       break;
  73    }
  74
  75    return visit_continue;
  76 }
  77
  78 ir_visitor_status
  79 ir_rvalue_visitor::visit_leave(ir_swizzle *ir)
  80 {
  81    handle_rvalue(&ir->val);
  82    return visit_continue;
  83 }
  84
  85 ir_visitor_status
  86 ir_rvalue_visitor::visit_leave(ir_dereference_array *ir)
  87 {
  88    /* The array index is not the target of the assignment, so clear the
  89     * 'in_assignee' flag.  Restore it after returning from the array index.
  90     */
  91    const bool was_in_assignee = this->in_assignee;
  92    this->in_assignee = false;
  93    handle_rvalue(&ir->array_index);
  94    this->in_assignee = was_in_assignee;
  95
  96    handle_rvalue(&ir->array);
  97    return visit_continue;
  98 }
  99
 100 ir_visitor_status
 101 ir_rvalue_visitor::visit_leave(ir_dereference_record *ir)
 102 {
 103    handle_rvalue(&ir->record);
 104    return visit_continue;
 105 }
 106
 107 ir_visitor_status
 108 ir_rvalue_visitor::visit_leave(ir_assignment *ir)
 109 {
 110    handle_rvalue(&ir->rhs);
 111    handle_rvalue(&ir->condition);
 112
 113    return visit_continue;
 114 }
 115
 116 ir_visitor_status
 117 ir_rvalue_visitor::visit_leave(ir_call *ir)
 118 {
 119    foreach_iter(exec_list_iterator, iter, *ir) {
 120       ir_rvalue *param = (ir_rvalue *)iter.get();
 121       ir_rvalue *new_param = param;
 122       handle_rvalue(&new_param);
 123
 124       if (new_param != param) {
 125          param->replace_with(new_param);
 126       }
 127    }
 128    return visit_continue;
 129 }
 130
 131 ir_visitor_status
 132 ir_rvalue_visitor::visit_leave(ir_return *ir)
 133 {
 134    handle_rvalue(&ir->value);;
 135    return visit_continue;
 136 }
 137
 138 ir_visitor_status
 139 ir_rvalue_visitor::visit_leave(ir_if *ir)
 140 {
 141    handle_rvalue(&ir->condition);
 142    return visit_continue;
 143 }