glsl: move to compiler/

Signed-off-by: Emil Velikov <[email protected]>
Acked-by: Matt Turner <[email protected]>
Acked-by: Jose Fonseca <[email protected]>

1 files changed, 0 insertions, 126 deletions

diff --git a/src/glsl/opt_if_simplification.cpp b/src/glsl/opt_if_simplification.cpp
deleted file mode 100644
index e05f03190aa..00000000000
--- a/src/glsl/opt_if_simplification.cpp
+++ /dev/null
@@ -1,126 +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 opt_if_simplification.cpp
- *
- * Moves constant branches of if statements out to the surrounding
- * instruction stream, and inverts if conditionals to avoid empty
- * "then" blocks.
- */
-
-#include "ir.h"
-
-namespace {
-
-class ir_if_simplification_visitor : public ir_hierarchical_visitor {
-public:
-   ir_if_simplification_visitor()
-   {
-      this->made_progress = false;
-   }
-
-   ir_visitor_status visit_leave(ir_if *);
-   ir_visitor_status visit_enter(ir_assignment *);
-
-   bool made_progress;
-};
-
-} /* unnamed namespace */
-
-/* We only care about the top level "if" instructions, so don't
- * descend into expressions.
- */
-ir_visitor_status
-ir_if_simplification_visitor::visit_enter(ir_assignment *ir)
-{
-   (void) ir;
-   return visit_continue_with_parent;
-}
-
-bool
-do_if_simplification(exec_list *instructions)
-{
-   ir_if_simplification_visitor v;
-
-   v.run(instructions);
-   return v.made_progress;
-}
-
-
-ir_visitor_status
-ir_if_simplification_visitor::visit_leave(ir_if *ir)
-{
-   /* If the if statement has nothing on either side, remove it. */
-   if (ir->then_instructions.is_empty() &&
-       ir->else_instructions.is_empty()) {
-      ir->remove();
-      this->made_progress = true;
-      return visit_continue;
-   }
-
-   /* FINISHME: Ideally there would be a way to note that the condition results
-    * FINISHME: in a constant before processing both of the other subtrees.
-    * FINISHME: This can probably be done with some flags, but it would take
-    * FINISHME: some work to get right.
-    */
-   ir_constant *condition_constant = ir->condition->constant_expression_value();
-   if (condition_constant) {
-      /* Move the contents of the one branch of the conditional
-       * that matters out.
-       */
-      if (condition_constant->value.b[0]) {
-         ir->insert_before(&ir->then_instructions);
-      } else {
-         ir->insert_before(&ir->else_instructions);
-      }
-      ir->remove();
-      this->made_progress = true;
-      return visit_continue;
-   }
-
-   /* Turn:
-    *
-    *     if (cond) {
-    *     } else {
-    *         do_work();
-    *     }
-    *
-    * into :
-    *
-    *     if (!cond)
-    *         do_work();
-    *
-    * which avoids control flow for "else" (which is usually more
-    * expensive than normal operations), and the "not" can usually be
-    * folded into the generation of "cond" anyway.
-    */
-   if (ir->then_instructions.is_empty()) {
-      ir->condition = new(ralloc_parent(ir->condition))
-	 ir_expression(ir_unop_logic_not, ir->condition);
-      ir->else_instructions.move_nodes_to(&ir->then_instructions);
-      this->made_progress = true;
-   }
-
-   return visit_continue;
-}