xserver and mesa git update 28-12-2010

1 files changed, 0 insertions, 348 deletions

diff --git a/mesalib/src/glsl/ir_copy_propagation.cpp b/mesalib/src/glsl/ir_copy_propagation.cpp
deleted file mode 100644
index 0fe8fa6c4..000000000
--- a/mesalib/src/glsl/ir_copy_propagation.cpp
+++ /dev/null
@@ -1,348 +0,0 @@
-/*
- * 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_copy_propagation.cpp
- *
- * Moves usage of recently-copied variables to the previous copy of
- * the variable.
- *
- * This should reduce the number of MOV instructions in the generated
- * programs unless copy propagation is also done on the LIR, and may
- * help anyway by triggering other optimizations that live in the HIR.
- */
-
-#include "ir.h"
-#include "ir_visitor.h"
-#include "ir_basic_block.h"
-#include "ir_optimization.h"
-#include "glsl_types.h"
-
-class acp_entry : public exec_node
-{
-public:
-   acp_entry(ir_variable *lhs, ir_variable *rhs)
-   {
-      assert(lhs);
-      assert(rhs);
-      this->lhs = lhs;
-      this->rhs = rhs;
-   }
-
-   ir_variable *lhs;
-   ir_variable *rhs;
-};
-
-
-class kill_entry : public exec_node
-{
-public:
-   kill_entry(ir_variable *var)
-   {
-      assert(var);
-      this->var = var;
-   }
-
-   ir_variable *var;
-};
-
-class ir_copy_propagation_visitor : public ir_hierarchical_visitor {
-public:
-   ir_copy_propagation_visitor()
-   {
-      progress = false;
-      mem_ctx = talloc_new(0);
-      this->acp = new(mem_ctx) exec_list;
-      this->kills = new(mem_ctx) exec_list;
-   }
-   ~ir_copy_propagation_visitor()
-   {
-      talloc_free(mem_ctx);
-   }
-
-   virtual ir_visitor_status visit(class ir_dereference_variable *);
-   virtual ir_visitor_status visit_enter(class ir_loop *);
-   virtual ir_visitor_status visit_enter(class ir_function_signature *);
-   virtual ir_visitor_status visit_enter(class ir_function *);
-   virtual ir_visitor_status visit_leave(class ir_assignment *);
-   virtual ir_visitor_status visit_enter(class ir_call *);
-   virtual ir_visitor_status visit_enter(class ir_if *);
-
-   void add_copy(ir_assignment *ir);
-   void kill(ir_variable *ir);
-   void handle_if_block(exec_list *instructions);
-
-   /** List of acp_entry: The available copies to propagate */
-   exec_list *acp;
-   /**
-    * List of kill_entry: The variables whose values were killed in this
-    * block.
-    */
-   exec_list *kills;
-
-   bool progress;
-
-   bool killed_all;
-
-   void *mem_ctx;
-};
-
-ir_visitor_status
-ir_copy_propagation_visitor::visit_enter(ir_function_signature *ir)
-{
-   /* Treat entry into a function signature as a completely separate
-    * block.  Any instructions at global scope will be shuffled into
-    * main() at link time, so they're irrelevant to us.
-    */
-   exec_list *orig_acp = this->acp;
-   exec_list *orig_kills = this->kills;
-   bool orig_killed_all = this->killed_all;
-
-   this->acp = new(mem_ctx) exec_list;
-   this->kills = new(mem_ctx) exec_list;
-   this->killed_all = false;
-
-   visit_list_elements(this, &ir->body);
-
-   this->kills = orig_kills;
-   this->acp = orig_acp;
-   this->killed_all = orig_killed_all;
-
-   return visit_continue_with_parent;
-}
-
-ir_visitor_status
-ir_copy_propagation_visitor::visit_leave(ir_assignment *ir)
-{
-   kill(ir->lhs->variable_referenced());
-
-   add_copy(ir);
-
-   return visit_continue;
-}
-
-ir_visitor_status
-ir_copy_propagation_visitor::visit_enter(ir_function *ir)
-{
-   (void) ir;
-   return visit_continue;
-}
-
-/**
- * Replaces dereferences of ACP RHS variables with ACP LHS variables.
- *
- * This is where the actual copy propagation occurs.  Note that the
- * rewriting of ir_dereference means that the ir_dereference instance
- * must not be shared by multiple IR operations!
- */
-ir_visitor_status
-ir_copy_propagation_visitor::visit(ir_dereference_variable *ir)
-{
-   if (this->in_assignee)
-      return visit_continue;
-
-   ir_variable *var = ir->var;
-
-   foreach_iter(exec_list_iterator, iter, *this->acp) {
-      acp_entry *entry = (acp_entry *)iter.get();
-
-      if (var == entry->lhs) {
-	 ir->var = entry->rhs;
-	 this->progress = true;
-	 break;
-      }
-   }
-
-   return visit_continue;
-}
-
-
-ir_visitor_status
-ir_copy_propagation_visitor::visit_enter(ir_call *ir)
-{
-   /* Do copy propagation on call parameters, but skip any out params */
-   exec_list_iterator sig_param_iter = ir->get_callee()->parameters.iterator();
-   foreach_iter(exec_list_iterator, iter, ir->actual_parameters) {
-      ir_variable *sig_param = (ir_variable *)sig_param_iter.get();
-      ir_instruction *ir = (ir_instruction *)iter.get();
-      if (sig_param->mode != ir_var_out && sig_param->mode != ir_var_inout) {
-         ir->accept(this);
-      }
-      sig_param_iter.next();
-   }
-
-   /* Since we're unlinked, we don't (necssarily) know the side effects of
-    * this call.  So kill all copies.
-    */
-   acp->make_empty();
-   this->killed_all = true;
-
-   return visit_continue_with_parent;
-}
-
-void
-ir_copy_propagation_visitor::handle_if_block(exec_list *instructions)
-{
-   exec_list *orig_acp = this->acp;
-   exec_list *orig_kills = this->kills;
-   bool orig_killed_all = this->killed_all;
-
-   this->acp = new(mem_ctx) exec_list;
-   this->kills = new(mem_ctx) exec_list;
-   this->killed_all = false;
-
-   /* Populate the initial acp with a copy of the original */
-   foreach_iter(exec_list_iterator, iter, *orig_acp) {
-      acp_entry *a = (acp_entry *)iter.get();
-      this->acp->push_tail(new(this->mem_ctx) acp_entry(a->lhs, a->rhs));
-   }
-
-   visit_list_elements(this, instructions);
-
-   if (this->killed_all) {
-      orig_acp->make_empty();
-   }
-
-   exec_list *new_kills = this->kills;
-   this->kills = orig_kills;
-   this->acp = orig_acp;
-   this->killed_all = this->killed_all || orig_killed_all;
-
-   foreach_iter(exec_list_iterator, iter, *new_kills) {
-      kill_entry *k = (kill_entry *)iter.get();
-      kill(k->var);
-   }
-}
-
-ir_visitor_status
-ir_copy_propagation_visitor::visit_enter(ir_if *ir)
-{
-   ir->condition->accept(this);
-
-   handle_if_block(&ir->then_instructions);
-   handle_if_block(&ir->else_instructions);
-
-   /* handle_if_block() already descended into the children. */
-   return visit_continue_with_parent;
-}
-
-ir_visitor_status
-ir_copy_propagation_visitor::visit_enter(ir_loop *ir)
-{
-   exec_list *orig_acp = this->acp;
-   exec_list *orig_kills = this->kills;
-   bool orig_killed_all = this->killed_all;
-
-   /* FINISHME: For now, the initial acp for loops is totally empty.
-    * We could go through once, then go through again with the acp
-    * cloned minus the killed entries after the first run through.
-    */
-   this->acp = new(mem_ctx) exec_list;
-   this->kills = new(mem_ctx) exec_list;
-   this->killed_all = false;
-
-   visit_list_elements(this, &ir->body_instructions);
-
-   if (this->killed_all) {
-      orig_acp->make_empty();
-   }
-
-   exec_list *new_kills = this->kills;
-   this->kills = orig_kills;
-   this->acp = orig_acp;
-   this->killed_all = this->killed_all || orig_killed_all;
-
-   foreach_iter(exec_list_iterator, iter, *new_kills) {
-      kill_entry *k = (kill_entry *)iter.get();
-      kill(k->var);
-   }
-
-   /* already descended into the children. */
-   return visit_continue_with_parent;
-}
-
-void
-ir_copy_propagation_visitor::kill(ir_variable *var)
-{
-   assert(var != NULL);
-
-   /* Remove any entries currently in the ACP for this kill. */
-   foreach_iter(exec_list_iterator, iter, *acp) {
-      acp_entry *entry = (acp_entry *)iter.get();
-
-      if (entry->lhs == var || entry->rhs == var) {
-	 entry->remove();
-      }
-   }
-
-   /* Add the LHS variable to the list of killed variables in this block.
-    */
-   this->kills->push_tail(new(this->mem_ctx) kill_entry(var));
-}
-
-/**
- * Adds an entry to the available copy list if it's a plain assignment
- * of a variable to a variable.
- */
-void
-ir_copy_propagation_visitor::add_copy(ir_assignment *ir)
-{
-   acp_entry *entry;
-
-   if (ir->condition) {
-      ir_constant *condition = ir->condition->as_constant();
-      if (!condition || !condition->value.b[0])
-	 return;
-   }
-
-   ir_variable *lhs_var = ir->whole_variable_written();
-   ir_variable *rhs_var = ir->rhs->whole_variable_referenced();
-
-   if ((lhs_var != NULL) && (rhs_var != NULL)) {
-      if (lhs_var == rhs_var) {
-	 /* This is a dumb assignment, but we've conveniently noticed
-	  * it here.  Removing it now would mess up the loop iteration
-	  * calling us.  Just flag it to not execute, and someone else
-	  * will clean up the mess.
-	  */
-	 ir->condition = new(talloc_parent(ir)) ir_constant(false);
-	 this->progress = true;
-      } else {
-	 entry = new(this->mem_ctx) acp_entry(lhs_var, rhs_var);
-	 this->acp->push_tail(entry);
-      }
-   }
-}
-
-/**
- * Does a copy propagation pass on the code present in the instruction stream.
- */
-bool
-do_copy_propagation(exec_list *instructions)
-{
-   ir_copy_propagation_visitor v;
-
-   visit_list_elements(&v, instructions);
-
-   return v.progress;
-}