From 24a692ce832161d3b794110dd82b1508d38a0887 Mon Sep 17 00:00:00 2001 From: marha Date: Mon, 12 Sep 2011 08:58:44 +0200 Subject: git update 12 sep 2011 --- mesalib/src/glsl/opt_if_simplification.cpp | 189 +++++++++++++++-------------- 1 file changed, 95 insertions(+), 94 deletions(-) (limited to 'mesalib/src/glsl/opt_if_simplification.cpp') diff --git a/mesalib/src/glsl/opt_if_simplification.cpp b/mesalib/src/glsl/opt_if_simplification.cpp index 2d8858e49..940dd08d5 100644 --- a/mesalib/src/glsl/opt_if_simplification.cpp +++ b/mesalib/src/glsl/opt_if_simplification.cpp @@ -1,94 +1,95 @@ -/* - * 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. - */ - -#include "ir.h" - -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; -}; - -/* 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) -{ - 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) -{ - /* 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]) { - foreach_iter(exec_list_iterator, then_iter, ir->then_instructions) { - ir_instruction *then_ir = (ir_instruction *)then_iter.get(); - ir->insert_before(then_ir); - } - } else { - foreach_iter(exec_list_iterator, else_iter, ir->else_instructions) { - ir_instruction *else_ir = (ir_instruction *)else_iter.get(); - ir->insert_before(else_ir); - } - } - ir->remove(); - this->made_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 opt_if_simplification.cpp + * + * Moves constant branches of if statements out to the surrounding + * instruction stream. + */ + +#include "ir.h" + +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; +}; + +/* 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) +{ + /* 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]) { + foreach_iter(exec_list_iterator, then_iter, ir->then_instructions) { + ir_instruction *then_ir = (ir_instruction *)then_iter.get(); + ir->insert_before(then_ir); + } + } else { + foreach_iter(exec_list_iterator, else_iter, ir->else_instructions) { + ir_instruction *else_ir = (ir_instruction *)else_iter.get(); + ir->insert_before(else_ir); + } + } + ir->remove(); + this->made_progress = true; + } + + return visit_continue; +} -- cgit v1.2.3