workbench/libs/mesa/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       handle_rvalue(&ir->lod_info.lod);
  67       break;
  68    case ir_txd:
  69       handle_rvalue(&ir->lod_info.grad.dPdx);
  70       handle_rvalue(&ir->lod_info.grad.dPdy);
  71       break;
  72    }
  73
  74    return visit_continue;
  75 }
  76
  77 ir_visitor_status
  78 ir_rvalue_visitor::visit_leave(ir_swizzle *ir)
  79 {
  80    handle_rvalue(&ir->val);
  81    return visit_continue;
  82 }
  83
  84 ir_visitor_status
  85 ir_rvalue_visitor::visit_leave(ir_dereference_array *ir)
  86 {
  87    /* The array index is not the target of the assignment, so clear the
  88     * 'in_assignee' flag.  Restore it after returning from the array index.
  89     */
  90    const bool was_in_assignee = this->in_assignee;
  91    this->in_assignee = false;
  92    handle_rvalue(&ir->array_index);
  93    this->in_assignee = was_in_assignee;
  94
  95    handle_rvalue(&ir->array);
  96    return visit_continue;
  97 }
  98
  99 ir_visitor_status
 100 ir_rvalue_visitor::visit_leave(ir_dereference_record *ir)
 101 {
 102    handle_rvalue(&ir->record);
 103    return visit_continue;
 104 }
 105
 106 ir_visitor_status
 107 ir_rvalue_visitor::visit_leave(ir_assignment *ir)
 108 {
 109    handle_rvalue(&ir->rhs);
 110    handle_rvalue(&ir->condition);
 111
 112    return visit_continue;
 113 }
 114
 115 ir_visitor_status
 116 ir_rvalue_visitor::visit_leave(ir_call *ir)
 117 {
 118    foreach_iter(exec_list_iterator, iter, *ir) {
 119       ir_rvalue *param = (ir_rvalue *)iter.get();
 120       ir_rvalue *new_param = param;
 121       handle_rvalue(&new_param);
 122
 123       if (new_param != param) {
 124          param->replace_with(new_param);
 125       }
 126    }
 127    return visit_continue;
 128 }
 129
 130 ir_visitor_status
 131 ir_rvalue_visitor::visit_leave(ir_return *ir)
 132 {
 133    handle_rvalue(&ir->value);;
 134    return visit_continue;
 135 }
 136
 137 ir_visitor_status
 138 ir_rvalue_visitor::visit_leave(ir_if *ir)
 139 {
 140    handle_rvalue(&ir->condition);
 141    return visit_continue;
 142 }