| 0,0 → 1,113 |
|---|
| /* |
| * Copyright © 2010 Intel Corporation |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice (including the next |
| * paragraph) shall be included in all copies or substantial portions of the |
| * Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
| * DEALINGS IN THE SOFTWARE. |
| */ |
| |
| /** |
| * \file ir_variable_refcount.cpp |
| * |
| * Provides a visitor which produces a list of variables referenced, |
| * how many times they were referenced and assigned, and whether they |
| * were defined in the scope. |
| */ |
| |
| #include "ir.h" |
| #include "ir_visitor.h" |
| #include "ir_variable_refcount.h" |
| #include "glsl_types.h" |
| |
| |
| // constructor |
| variable_entry::variable_entry(ir_variable *var) |
| { |
| this->var = var; |
| assign = NULL; |
| assigned_count = 0; |
| declaration = false; |
| referenced_count = 0; |
| } |
| |
| |
| variable_entry * |
| ir_variable_refcount_visitor::get_variable_entry(ir_variable *var) |
| { |
| assert(var); |
| foreach_iter(exec_list_iterator, iter, this->variable_list) { |
| variable_entry *entry = (variable_entry *)iter.get(); |
| if (entry->var == var) |
| return entry; |
| } |
| |
| variable_entry *entry = new(mem_ctx) variable_entry(var); |
| assert(entry->referenced_count == 0); |
| this->variable_list.push_tail(entry); |
| return entry; |
| } |
| |
| |
| ir_visitor_status |
| ir_variable_refcount_visitor::visit(ir_variable *ir) |
| { |
| variable_entry *entry = this->get_variable_entry(ir); |
| if (entry) |
| entry->declaration = true; |
| |
| return visit_continue; |
| } |
| |
| |
| ir_visitor_status |
| ir_variable_refcount_visitor::visit(ir_dereference_variable *ir) |
| { |
| ir_variable *const var = ir->variable_referenced(); |
| variable_entry *entry = this->get_variable_entry(var); |
| |
| if (entry) |
| entry->referenced_count++; |
| |
| return visit_continue; |
| } |
| |
| |
| ir_visitor_status |
| ir_variable_refcount_visitor::visit_enter(ir_function_signature *ir) |
| { |
| /* We don't want to descend into the function parameters and |
| * dead-code eliminate them, so just accept the body here. |
| */ |
| visit_list_elements(this, &ir->body); |
| return visit_continue_with_parent; |
| } |
| |
| |
| ir_visitor_status |
| ir_variable_refcount_visitor::visit_leave(ir_assignment *ir) |
| { |
| variable_entry *entry; |
| entry = this->get_variable_entry(ir->lhs->variable_referenced()); |
| if (entry) { |
| entry->assigned_count++; |
| if (entry->assign == NULL) |
| entry->assign = ir; |
| } |
| |
| return visit_continue; |
| } |