1 files changed, 200 insertions, 200 deletions
diff --git a/mesalib/src/glsl/lower_if_to_cond_assign.cpp b/mesalib/src/glsl/lower_if_to_cond_assign.cpp
index 9212ae21e..e3a1065d9 100644
--- a/mesalib/src/glsl/lower_if_to_cond_assign.cpp
+++ b/mesalib/src/glsl/lower_if_to_cond_assign.cpp
@@ -1,200 +1,200 @@
-/*
- * 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 lower_if_to_cond_assign.cpp
- *
- * This attempts to flatten if-statements to conditional assignments for
- * GPUs with limited or no flow control support.
- *
- * It can't handle other control flow being inside of its block, such
- * as calls or loops.  Hopefully loop unrolling and inlining will take
- * care of those.
- *
- * Drivers for GPUs with no control flow support should simply call
- *
- *    lower_if_to_cond_assign(instructions)
- *
- * to attempt to flatten all if-statements.
- *
- * Some GPUs (such as i965 prior to gen6) do support control flow, but have a
- * maximum nesting depth N.  Drivers for such hardware can call
- *
- *    lower_if_to_cond_assign(instructions, N)
- *
- * to attempt to flatten any if-statements appearing at depth > N.
- */
-
-#include "glsl_types.h"
-#include "ir.h"
-
-class ir_if_to_cond_assign_visitor : public ir_hierarchical_visitor {
-public:
-   ir_if_to_cond_assign_visitor(unsigned max_depth)
-   {
-      this->progress = false;
-      this->max_depth = max_depth;
-      this->depth = 0;
-   }
-
-   ir_visitor_status visit_enter(ir_if *);
-   ir_visitor_status visit_leave(ir_if *);
-
-   bool progress;
-   unsigned max_depth;
-   unsigned depth;
-};
-
-bool
-lower_if_to_cond_assign(exec_list *instructions, unsigned max_depth)
-{
-   ir_if_to_cond_assign_visitor v(max_depth);
-
-   visit_list_elements(&v, instructions);
-
-   return v.progress;
-}
-
-void
-check_control_flow(ir_instruction *ir, void *data)
-{
-   bool *found_control_flow = (bool *)data;
-   switch (ir->ir_type) {
-   case ir_type_call:
-   case ir_type_discard:
-   case ir_type_loop:
-   case ir_type_loop_jump:
-   case ir_type_return:
-      *found_control_flow = true;
-      break;
-   default:
-      break;
-   }
-}
-
-void
-move_block_to_cond_assign(void *mem_ctx,
-			  ir_if *if_ir, ir_variable *cond_var, bool then)
-{
-   exec_list *instructions;
-
-   if (then) {
-      instructions = &if_ir->then_instructions;
-   } else {
-      instructions = &if_ir->else_instructions;
-   }
-
-   foreach_iter(exec_list_iterator, iter, *instructions) {
-      ir_instruction *ir = (ir_instruction *)iter.get();
-
-      if (ir->ir_type == ir_type_assignment) {
-	 ir_assignment *assign = (ir_assignment *)ir;
-	 ir_rvalue *cond_expr;
-	 ir_dereference *deref = new(mem_ctx) ir_dereference_variable(cond_var);
-
-	 if (then) {
-	    cond_expr = deref;
-	 } else {
-	    cond_expr = new(mem_ctx) ir_expression(ir_unop_logic_not,
-						   glsl_type::bool_type,
-						   deref,
-						   NULL);
-	 }
-
-	 if (!assign->condition) {
-	    assign->condition = cond_expr;
-	 } else {
-	    assign->condition = new(mem_ctx) ir_expression(ir_binop_logic_and,
-							   glsl_type::bool_type,
-							   cond_expr,
-							   assign->condition);
-	 }
-      }
-
-      /* Now, move from the if block to the block surrounding it. */
-      ir->remove();
-      if_ir->insert_before(ir);
-   }
-}
-
-ir_visitor_status
-ir_if_to_cond_assign_visitor::visit_enter(ir_if *ir)
-{
-   (void) ir;
-   this->depth++;
-   return visit_continue;
-}
-
-ir_visitor_status
-ir_if_to_cond_assign_visitor::visit_leave(ir_if *ir)
-{
-   /* Only flatten when beyond the GPU's maximum supported nesting depth. */
-   if (this->depth <= this->max_depth)
-      return visit_continue;
-
-   this->depth--;
-
-   bool found_control_flow = false;
-   ir_variable *cond_var;
-   ir_assignment *assign;
-   ir_dereference_variable *deref;
-
-   /* Check that both blocks don't contain anything we can't support. */
-   foreach_iter(exec_list_iterator, then_iter, ir->then_instructions) {
-      ir_instruction *then_ir = (ir_instruction *)then_iter.get();
-      visit_tree(then_ir, check_control_flow, &found_control_flow);
-   }
-   foreach_iter(exec_list_iterator, else_iter, ir->else_instructions) {
-      ir_instruction *else_ir = (ir_instruction *)else_iter.get();
-      visit_tree(else_ir, check_control_flow, &found_control_flow);
-   }
-   if (found_control_flow)
-      return visit_continue;
-
-   void *mem_ctx = talloc_parent(ir);
-
-   /* Store the condition to a variable so the assignment conditions are
-    * simpler.
-    */
-   cond_var = new(mem_ctx) ir_variable(glsl_type::bool_type,
-				       "if_to_cond_assign_condition",
-				       ir_var_temporary);
-   ir->insert_before(cond_var);
-
-   deref = new(mem_ctx) ir_dereference_variable(cond_var);
-   assign = new(mem_ctx) ir_assignment(deref,
-				       ir->condition, NULL);
-   ir->insert_before(assign);
-
-   /* Now, move all of the instructions out of the if blocks, putting
-    * conditions on assignments.
-    */
-   move_block_to_cond_assign(mem_ctx, ir, cond_var, true);
-   move_block_to_cond_assign(mem_ctx, ir, cond_var, false);
-
-   ir->remove();
-
-   this->progress = true;
-
-   return visit_continue;
-}
+/*
+ * 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 lower_if_to_cond_assign.cpp
+ *
+ * This attempts to flatten if-statements to conditional assignments for
+ * GPUs with limited or no flow control support.
+ *
+ * It can't handle other control flow being inside of its block, such
+ * as calls or loops.  Hopefully loop unrolling and inlining will take
+ * care of those.
+ *
+ * Drivers for GPUs with no control flow support should simply call
+ *
+ *    lower_if_to_cond_assign(instructions)
+ *
+ * to attempt to flatten all if-statements.
+ *
+ * Some GPUs (such as i965 prior to gen6) do support control flow, but have a
+ * maximum nesting depth N.  Drivers for such hardware can call
+ *
+ *    lower_if_to_cond_assign(instructions, N)
+ *
+ * to attempt to flatten any if-statements appearing at depth > N.
+ */
+
+#include "glsl_types.h"
+#include "ir.h"
+
+class ir_if_to_cond_assign_visitor : public ir_hierarchical_visitor {
+public:
+   ir_if_to_cond_assign_visitor(unsigned max_depth)
+   {
+      this->progress = false;
+      this->max_depth = max_depth;
+      this->depth = 0;
+   }
+
+   ir_visitor_status visit_enter(ir_if *);
+   ir_visitor_status visit_leave(ir_if *);
+
+   bool progress;
+   unsigned max_depth;
+   unsigned depth;
+};
+
+bool
+lower_if_to_cond_assign(exec_list *instructions, unsigned max_depth)
+{
+   ir_if_to_cond_assign_visitor v(max_depth);
+
+   visit_list_elements(&v, instructions);
+
+   return v.progress;
+}
+
+void
+check_control_flow(ir_instruction *ir, void *data)
+{
+   bool *found_control_flow = (bool *)data;
+   switch (ir->ir_type) {
+   case ir_type_call:
+   case ir_type_discard:
+   case ir_type_loop:
+   case ir_type_loop_jump:
+   case ir_type_return:
+      *found_control_flow = true;
+      break;
+   default:
+      break;
+   }
+}
+
+void
+move_block_to_cond_assign(void *mem_ctx,
+			  ir_if *if_ir, ir_variable *cond_var, bool then)
+{
+   exec_list *instructions;
+
+   if (then) {
+      instructions = &if_ir->then_instructions;
+   } else {
+      instructions = &if_ir->else_instructions;
+   }
+
+   foreach_iter(exec_list_iterator, iter, *instructions) {
+      ir_instruction *ir = (ir_instruction *)iter.get();
+
+      if (ir->ir_type == ir_type_assignment) {
+	 ir_assignment *assign = (ir_assignment *)ir;
+	 ir_rvalue *cond_expr;
+	 ir_dereference *deref = new(mem_ctx) ir_dereference_variable(cond_var);
+
+	 if (then) {
+	    cond_expr = deref;
+	 } else {
+	    cond_expr = new(mem_ctx) ir_expression(ir_unop_logic_not,
+						   glsl_type::bool_type,
+						   deref,
+						   NULL);
+	 }
+
+	 if (!assign->condition) {
+	    assign->condition = cond_expr;
+	 } else {
+	    assign->condition = new(mem_ctx) ir_expression(ir_binop_logic_and,
+							   glsl_type::bool_type,
+							   cond_expr,
+							   assign->condition);
+	 }
+      }
+
+      /* Now, move from the if block to the block surrounding it. */
+      ir->remove();
+      if_ir->insert_before(ir);
+   }
+}
+
+ir_visitor_status
+ir_if_to_cond_assign_visitor::visit_enter(ir_if *ir)
+{
+   (void) ir;
+   this->depth++;
+   return visit_continue;
+}
+
+ir_visitor_status
+ir_if_to_cond_assign_visitor::visit_leave(ir_if *ir)
+{
+   /* Only flatten when beyond the GPU's maximum supported nesting depth. */
+   if (this->depth <= this->max_depth)
+      return visit_continue;
+
+   this->depth--;
+
+   bool found_control_flow = false;
+   ir_variable *cond_var;
+   ir_assignment *assign;
+   ir_dereference_variable *deref;
+
+   /* Check that both blocks don't contain anything we can't support. */
+   foreach_iter(exec_list_iterator, then_iter, ir->then_instructions) {
+      ir_instruction *then_ir = (ir_instruction *)then_iter.get();
+      visit_tree(then_ir, check_control_flow, &found_control_flow);
+   }
+   foreach_iter(exec_list_iterator, else_iter, ir->else_instructions) {
+      ir_instruction *else_ir = (ir_instruction *)else_iter.get();
+      visit_tree(else_ir, check_control_flow, &found_control_flow);
+   }
+   if (found_control_flow)
+      return visit_continue;
+
+   void *mem_ctx = ralloc_parent(ir);
+
+   /* Store the condition to a variable so the assignment conditions are
+    * simpler.
+    */
+   cond_var = new(mem_ctx) ir_variable(glsl_type::bool_type,
+				       "if_to_cond_assign_condition",
+				       ir_var_temporary);
+   ir->insert_before(cond_var);
+
+   deref = new(mem_ctx) ir_dereference_variable(cond_var);
+   assign = new(mem_ctx) ir_assignment(deref,
+				       ir->condition, NULL);
+   ir->insert_before(assign);
+
+   /* Now, move all of the instructions out of the if blocks, putting
+    * conditions on assignments.
+    */
+   move_block_to_cond_assign(mem_ctx, ir, cond_var, true);
+   move_block_to_cond_assign(mem_ctx, ir, cond_var, false);
+
+   ir->remove();
+
+   this->progress = true;
+
+   return visit_continue;
+}