From 29285882676388aacff123e8bdf025904abf8ea9 Mon Sep 17 00:00:00 2001 From: Eric Anholt Date: Thu, 24 Jun 2010 15:32:15 -0700 Subject: glsl2: Move the compiler to the subdirectory it will live in in Mesa. --- src/glsl/ir_expression_flattening.cpp | 172 ++++++++++++++++++++++++++++++++++ 1 file changed, 172 insertions(+) create mode 100644 src/glsl/ir_expression_flattening.cpp (limited to 'src/glsl/ir_expression_flattening.cpp') diff --git a/src/glsl/ir_expression_flattening.cpp b/src/glsl/ir_expression_flattening.cpp new file mode 100644 index 0000000000..5ba24e390b --- /dev/null +++ b/src/glsl/ir_expression_flattening.cpp @@ -0,0 +1,172 @@ +/* + * 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_expression_flattening.cpp + * + * Takes the leaves of expression trees and makes them dereferences of + * assignments of the leaves to temporaries, according to a predicate. + * + * This is used for automatic function inlining, where we want to take + * an expression containing a call and move the call out to its own + * assignment so that we can inline it at the appropriate place in the + * instruction stream. + */ + +#include "ir.h" +#include "ir_visitor.h" +#include "ir_expression_flattening.h" +#include "glsl_types.h" + +class ir_expression_flattening_visitor : public ir_hierarchical_visitor { +public: + ir_expression_flattening_visitor(ir_instruction *base_ir, + bool (*predicate)(ir_instruction *ir)) + { + this->base_ir = base_ir; + this->predicate = predicate; + } + + virtual ~ir_expression_flattening_visitor() + { + /* empty */ + } + + virtual ir_visitor_status visit_enter(ir_call *); + virtual ir_visitor_status visit_enter(ir_return *); + virtual ir_visitor_status visit_enter(ir_function_signature *); + virtual ir_visitor_status visit_enter(ir_if *); + virtual ir_visitor_status visit_enter(ir_loop *); + virtual ir_visitor_status visit_leave(ir_expression *); + virtual ir_visitor_status visit_leave(ir_swizzle *); + + bool (*predicate)(ir_instruction *ir); + ir_instruction *base_ir; +}; + +void +do_expression_flattening(exec_list *instructions, + bool (*predicate)(ir_instruction *ir)) +{ + foreach_iter(exec_list_iterator, iter, *instructions) { + ir_instruction *ir = (ir_instruction *)iter.get(); + + ir_expression_flattening_visitor v(ir, predicate); + ir->accept(&v); + } +} + + +static ir_rvalue * +operand_to_temp(ir_instruction *base_ir, ir_rvalue *ir) +{ + void *ctx = talloc_parent(base_ir); + ir_variable *var; + ir_assignment *assign; + + var = new(ctx) ir_variable(ir->type, "flattening_tmp"); + base_ir->insert_before(var); + + assign = new(ctx) ir_assignment(new(ctx) ir_dereference_variable(var), + ir, + NULL); + base_ir->insert_before(assign); + + return new(ctx) ir_dereference_variable(var); +} + +ir_visitor_status +ir_expression_flattening_visitor::visit_enter(ir_function_signature *ir) +{ + do_expression_flattening(&ir->body, this->predicate); + + return visit_continue_with_parent; +} + +ir_visitor_status +ir_expression_flattening_visitor::visit_enter(ir_loop *ir) +{ + do_expression_flattening(&ir->body_instructions, this->predicate); + + return visit_continue_with_parent; +} + +ir_visitor_status +ir_expression_flattening_visitor::visit_enter(ir_if *ir) +{ + ir->condition->accept(this); + + do_expression_flattening(&ir->then_instructions, this->predicate); + do_expression_flattening(&ir->else_instructions, this->predicate); + + return visit_continue_with_parent; +} + +ir_visitor_status +ir_expression_flattening_visitor::visit_leave(ir_expression *ir) +{ + unsigned int operand; + + for (operand = 0; operand < ir->get_num_operands(); operand++) { + /* If the operand matches the predicate, then we'll assign its + * value to a temporary and deref the temporary as the operand. + */ + if (this->predicate(ir->operands[operand])) { + ir->operands[operand] = operand_to_temp(base_ir, + ir->operands[operand]); + } + } + + return visit_continue; +} + +ir_visitor_status +ir_expression_flattening_visitor::visit_leave(ir_swizzle *ir) +{ + if (this->predicate(ir->val)) { + ir->val = operand_to_temp(this->base_ir, ir->val); + } + + return visit_continue; +} + +ir_visitor_status +ir_expression_flattening_visitor::visit_enter(ir_call *ir) +{ + /* FINISHME: Why not process the call parameters? (Same behavior as original + * FINISHME: code.) + */ + (void) ir; + return visit_continue_with_parent; +} + + +ir_visitor_status +ir_expression_flattening_visitor::visit_enter(ir_return *ir) +{ + /* FINISHME: Why not process the return value? (Same behavior as original + * FINISHME: code.) + */ + (void) ir; + return visit_continue_with_parent; +} -- cgit v1.2.3