xserver libX11 libxcb mesa git update 15 Mar 2011

1 files changed, 120 insertions, 111 deletions

diff --git a/mesalib/src/glsl/opt_redundant_jumps.cpp b/mesalib/src/glsl/opt_redundant_jumps.cpp
index edf4bb6c2..eb60519e2 100644
--- a/mesalib/src/glsl/opt_redundant_jumps.cpp
+++ b/mesalib/src/glsl/opt_redundant_jumps.cpp
@@ -1,111 +1,120 @@
-/*
- * 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_redundant_jumps.cpp
- * Remove certain types of redundant jumps
- */
-
-#include "ir.h"
-
-class redundant_jumps_visitor : public ir_hierarchical_visitor {
-public:
-   redundant_jumps_visitor()
-   {
-      this->progress = false;
-   }
-
-   virtual ir_visitor_status visit_leave(ir_if *);
-   virtual ir_visitor_status visit_leave(ir_loop *);
-
-   bool progress;
-};
-
-
-ir_visitor_status
-redundant_jumps_visitor::visit_leave(ir_if *ir)
-{
-   /* If the last instruction in both branches is a 'break' or a 'continue',
-    * pull it out of the branches and insert it after the if-statment.  Note
-    * that both must be the same type (either 'break' or 'continue').
-    */
-   ir_instruction *const last_then =
-      (ir_instruction *) ir->then_instructions.get_tail();
-   ir_instruction *const last_else =
-      (ir_instruction *) ir->else_instructions.get_tail();
-
-   if ((last_then == NULL) || (last_else == NULL))
-      return visit_continue;
-
-   if ((last_then->ir_type != ir_type_loop_jump)
-       || (last_else->ir_type != ir_type_loop_jump))
-      return visit_continue;
-
-   ir_loop_jump *const then_jump = (ir_loop_jump *) last_then;
-   ir_loop_jump *const else_jump = (ir_loop_jump *) last_else;
-
-   if (then_jump->mode != else_jump->mode)
-      return visit_continue;
-
-   then_jump->remove();
-   else_jump->remove();
-   this->progress = true;
-
-   ir->insert_after(then_jump);
-
-   /* If both branchs of the if-statement are now empty, remove the
-    * if-statement.
-    */
-   if (ir->then_instructions.is_empty() && ir->else_instructions.is_empty())
-      ir->remove();
-
-   return visit_continue;
-}
-
-
-ir_visitor_status
-redundant_jumps_visitor::visit_leave(ir_loop *ir)
-{
-   /* If the last instruction of a loop body is a 'continue', remove it.
-    */
-   ir_instruction *const last =
-      (ir_instruction *) ir->body_instructions.get_tail();
-
-   if (last && (last->ir_type == ir_type_loop_jump)
-       && (((ir_loop_jump *) last)->mode == ir_loop_jump::jump_continue)) {
-      last->remove();
-      this->progress = true;
-   }
-
-   return visit_continue;
-}
-
-
-bool
-optimize_redundant_jumps(exec_list *instructions)
-{
-   redundant_jumps_visitor v;
-
-   v.run(instructions);
-   return v.progress;
-}
+/*

+ * 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_redundant_jumps.cpp

+ * Remove certain types of redundant jumps

+ */

+

+#include "ir.h"

+

+class redundant_jumps_visitor : public ir_hierarchical_visitor {

+public:

+   redundant_jumps_visitor()

+   {

+      this->progress = false;

+   }

+

+   virtual ir_visitor_status visit_leave(ir_if *);

+   virtual ir_visitor_status visit_leave(ir_loop *);

+   virtual ir_visitor_status visit_enter(ir_assignment *);

+

+   bool progress;

+};

+

+/* We only care about the top level instructions, so don't descend

+ * into expressions.

+ */

+ir_visitor_status

+redundant_jumps_visitor::visit_enter(ir_assignment *ir)

+{

+   return visit_continue_with_parent;

+}

+

+ir_visitor_status

+redundant_jumps_visitor::visit_leave(ir_if *ir)

+{

+   /* If the last instruction in both branches is a 'break' or a 'continue',

+    * pull it out of the branches and insert it after the if-statment.  Note

+    * that both must be the same type (either 'break' or 'continue').

+    */

+   ir_instruction *const last_then =

+      (ir_instruction *) ir->then_instructions.get_tail();

+   ir_instruction *const last_else =

+      (ir_instruction *) ir->else_instructions.get_tail();

+

+   if ((last_then == NULL) || (last_else == NULL))

+      return visit_continue;

+

+   if ((last_then->ir_type != ir_type_loop_jump)

+       || (last_else->ir_type != ir_type_loop_jump))

+      return visit_continue;

+

+   ir_loop_jump *const then_jump = (ir_loop_jump *) last_then;

+   ir_loop_jump *const else_jump = (ir_loop_jump *) last_else;

+

+   if (then_jump->mode != else_jump->mode)

+      return visit_continue;

+

+   then_jump->remove();

+   else_jump->remove();

+   this->progress = true;

+

+   ir->insert_after(then_jump);

+

+   /* If both branchs of the if-statement are now empty, remove the

+    * if-statement.

+    */

+   if (ir->then_instructions.is_empty() && ir->else_instructions.is_empty())

+      ir->remove();

+

+   return visit_continue;

+}

+

+

+ir_visitor_status

+redundant_jumps_visitor::visit_leave(ir_loop *ir)

+{

+   /* If the last instruction of a loop body is a 'continue', remove it.

+    */

+   ir_instruction *const last =

+      (ir_instruction *) ir->body_instructions.get_tail();

+

+   if (last && (last->ir_type == ir_type_loop_jump)

+       && (((ir_loop_jump *) last)->mode == ir_loop_jump::jump_continue)) {

+      last->remove();

+      this->progress = true;

+   }

+

+   return visit_continue;

+}

+

+

+bool

+optimize_redundant_jumps(exec_list *instructions)

+{

+   redundant_jumps_visitor v;

+

+   v.run(instructions);

+   return v.progress;

+}