src/glsl/ir_equals.cpp

   1 /*
   2  * Copyright © 2013 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  * Helper for checking equality when one instruction might be NULL, since you
  28  * can't access a's vtable in that case.
  29  */
  30 static bool
  31 possibly_null_equals(ir_instruction *a, ir_instruction *b)
  32 {
  33    if (!a || !b)
  34       return !a && !b;
  35
  36    return a->equals(b);
  37 }
  38
  39 /**
  40  * The base equality function: Return not equal for anything we don't know
  41  * about.
  42  */
  43 bool
  44 ir_instruction::equals(ir_instruction *ir)
  45 {
  46    return false;
  47 }
  48
  49 bool
  50 ir_constant::equals(ir_instruction *ir)
  51 {
  52    const ir_constant *other = ir->as_constant();
  53    if (!other)
  54       return false;
  55
  56    if (type != other->type)
  57       return false;
  58
  59    for (unsigned i = 0; i < type->components(); i++) {
  60       if (value.u[i] != other->value.u[i])
  61          return false;
  62    }
  63
  64    return true;
  65 }
  66
  67 bool
  68 ir_dereference_variable::equals(ir_instruction *ir)
  69 {
  70    const ir_dereference_variable *other = ir->as_dereference_variable();
  71    if (!other)
  72       return false;
  73
  74    return var == other->var;
  75 }
  76
  77 bool
  78 ir_dereference_array::equals(ir_instruction *ir)
  79 {
  80    const ir_dereference_array *other = ir->as_dereference_array();
  81    if (!other)
  82       return false;
  83
  84    if (type != other->type)
  85       return false;
  86
  87    if (!array->equals(other->array))
  88       return false;
  89
  90    if (!array_index->equals(other->array_index))
  91       return false;
  92
  93    return true;
  94 }
  95
  96 bool
  97 ir_swizzle::equals(ir_instruction *ir)
  98 {
  99    const ir_swizzle *other = ir->as_swizzle();
 100    if (!other)
 101       return false;
 102
 103    if (type != other->type)
 104       return false;
 105
 106    if (mask.x != other->mask.x ||
 107        mask.y != other->mask.y ||
 108        mask.z != other->mask.z ||
 109        mask.w != other->mask.w) {
 110       return false;
 111    }
 112
 113    return val->equals(other->val);
 114 }
 115
 116 bool
 117 ir_texture::equals(ir_instruction *ir)
 118 {
 119    const ir_texture *other = ir->as_texture();
 120    if (!other)
 121       return false;
 122
 123    if (type != other->type)
 124       return false;
 125
 126    if (op != other->op)
 127       return false;
 128
 129    if (!possibly_null_equals(coordinate, other->coordinate))
 130       return false;
 131
 132    if (!possibly_null_equals(projector, other->projector))
 133       return false;
 134
 135    if (!possibly_null_equals(shadow_comparitor, other->shadow_comparitor))
 136       return false;
 137
 138    if (!possibly_null_equals(offset, other->offset))
 139       return false;
 140
 141    if (!sampler->equals(other->sampler))
 142       return false;
 143
 144    switch (op) {
 145    case ir_tex:
 146    case ir_lod:
 147    case ir_query_levels:
 148       break;
 149    case ir_txb:
 150       if (!lod_info.bias->equals(other->lod_info.bias))
 151          return false;
 152       break;
 153    case ir_txl:
 154    case ir_txf:
 155    case ir_txs:
 156       if (!lod_info.lod->equals(other->lod_info.lod))
 157          return false;
 158       break;
 159    case ir_txd:
 160       if (!lod_info.grad.dPdx->equals(other->lod_info.grad.dPdx) ||
 161           !lod_info.grad.dPdy->equals(other->lod_info.grad.dPdy))
 162          return false;
 163       break;
 164    case ir_txf_ms:
 165       if (!lod_info.sample_index->equals(other->lod_info.sample_index))
 166          return false;
 167       break;
 168    case ir_tg4:
 169       if (!lod_info.component->equals(other->lod_info.component))
 170          return false;
 171       break;
 172    default:
 173       assert(!"Unrecognized texture op");
 174    }
 175
 176    return true;
 177 }
 178
 179 bool
 180 ir_expression::equals(ir_instruction *ir)
 181 {
 182    const ir_expression *other = ir->as_expression();
 183    if (!other)
 184       return false;
 185
 186    if (type != other->type)
 187       return false;
 188
 189    if (operation != other->operation)
 190       return false;
 191
 192    for (unsigned i = 0; i < get_num_operands(); i++) {
 193       if (!operands[i]->equals(other->operands[i]))
 194          return false;
 195    }
 196
 197    return true;
 198 }