mirror of https://gitlab.freedesktop.org/mesa/mesa
531 lines
12 KiB
C++
531 lines
12 KiB
C++
/*
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* Copyright © 2010 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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/**
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* \file ir_function_inlining.cpp
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*
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* Replaces calls to functions with the body of the function.
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*/
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#define NULL 0
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#include "ir.h"
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#include "ir_visitor.h"
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#include "ir_function_inlining.h"
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#include "ir_expression_flattening.h"
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#include "glsl_types.h"
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class variable_remap : public exec_node {
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public:
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variable_remap(const ir_variable *old_var, ir_variable *new_var)
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: old_var(old_var), new_var(new_var)
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{
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/* empty */
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}
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const ir_variable *old_var;
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ir_variable *new_var;
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};
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class ir_function_cloning_visitor : public ir_visitor {
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public:
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ir_function_cloning_visitor(ir_variable *retval)
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: retval(retval)
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{
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/* empty */
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}
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virtual ~ir_function_cloning_visitor()
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{
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/* empty */
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}
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void remap_variable(const ir_variable *old_var, ir_variable *new_var) {
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variable_remap *remap = new variable_remap(old_var, new_var);
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this->remap_list.push_tail(remap);
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}
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ir_variable *get_remapped_variable(ir_variable *var) {
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foreach_iter(exec_list_iterator, iter, this->remap_list) {
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variable_remap *remap = (variable_remap *)iter.get();
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if (var == remap->old_var)
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return remap->new_var;
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}
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/* Not a reapped variable, so a global scoped reference, for example. */
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return var;
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}
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/* List of variable_remap for mapping from original function body variables
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* to inlined function body variables.
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*/
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exec_list remap_list;
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/* Return value for the inlined function. */
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ir_variable *retval;
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/**
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* \name Visit methods
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*
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* As typical for the visitor pattern, there must be one \c visit method for
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* each concrete subclass of \c ir_instruction. Virtual base classes within
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* the hierarchy should not have \c visit methods.
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*/
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/*@{*/
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virtual void visit(ir_variable *);
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virtual void visit(ir_loop *);
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virtual void visit(ir_loop_jump *);
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virtual void visit(ir_function_signature *);
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virtual void visit(ir_function *);
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virtual void visit(ir_expression *);
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virtual void visit(ir_swizzle *);
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virtual void visit(ir_dereference *);
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virtual void visit(ir_assignment *);
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virtual void visit(ir_constant *);
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virtual void visit(ir_call *);
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virtual void visit(ir_return *);
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virtual void visit(ir_if *);
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/*@}*/
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ir_instruction *result;
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};
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void
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ir_function_cloning_visitor::visit(ir_variable *ir)
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{
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ir_variable *new_var = ir->clone();
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this->result = new_var;
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this->remap_variable(ir, new_var);
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}
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void
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ir_function_cloning_visitor::visit(ir_loop *ir)
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{
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/* FINISHME: Implement loop cloning. */
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assert(0);
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(void)ir;
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this->result = NULL;
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}
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void
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ir_function_cloning_visitor::visit(ir_loop_jump *ir)
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{
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/* FINISHME: Implement loop cloning. */
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assert(0);
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(void) ir;
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this->result = NULL;
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}
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void
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ir_function_cloning_visitor::visit(ir_function_signature *ir)
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{
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assert(0);
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(void)ir;
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this->result = NULL;
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}
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void
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ir_function_cloning_visitor::visit(ir_function *ir)
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{
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assert(0);
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(void) ir;
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this->result = NULL;
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}
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void
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ir_function_cloning_visitor::visit(ir_expression *ir)
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{
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unsigned int operand;
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ir_rvalue *op[2] = {NULL, NULL};
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for (operand = 0; operand < ir->get_num_operands(); operand++) {
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ir->operands[operand]->accept(this);
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op[operand] = this->result->as_rvalue();
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assert(op[operand]);
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}
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this->result = new ir_expression(ir->operation, ir->type, op[0], op[1]);
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}
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void
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ir_function_cloning_visitor::visit(ir_swizzle *ir)
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{
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ir->val->accept(this);
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this->result = new ir_swizzle(this->result->as_rvalue(), ir->mask);
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}
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void
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ir_function_cloning_visitor::visit(ir_dereference *ir)
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{
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if (ir->mode == ir_dereference::ir_reference_variable) {
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ir_variable *old_var = ir->var->as_variable();
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/* If it's a deref of a real variable, then we need to remap it if
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* it was local to the function.
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*/
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if (old_var) {
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ir_variable *new_var;
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new_var = this->get_remapped_variable(old_var);
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this->result = new ir_dereference(new_var);
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} else {
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ir->var->accept(this);
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this->result = new ir_dereference(this->result);
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}
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} else if (ir->mode == ir_dereference::ir_reference_array) {
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ir_instruction *variable;
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ir_rvalue *index;
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ir->var->accept(this);
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variable = this->result;
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ir->selector.array_index->accept(this);
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index = this->result->as_rvalue();
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this->result = new ir_dereference(variable, index);
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} else {
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assert(ir->mode == ir_dereference::ir_reference_record);
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/* FINISHME: inlining of structure references */
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assert(0);
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}
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}
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void
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ir_function_cloning_visitor::visit(ir_assignment *ir)
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{
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ir_rvalue *lhs, *rhs, *condition = NULL;
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ir->lhs->accept(this);
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lhs = this->result->as_rvalue();
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ir->rhs->accept(this);
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rhs = this->result->as_rvalue();
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if (ir->condition) {
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ir->condition->accept(this);
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condition = this->result->as_rvalue();
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}
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this->result = new ir_assignment(lhs, rhs, condition);
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}
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void
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ir_function_cloning_visitor::visit(ir_constant *ir)
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{
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this->result = ir->clone();
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}
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void
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ir_function_cloning_visitor::visit(ir_call *ir)
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{
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exec_list parameters;
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foreach_iter(exec_list_iterator, iter, *ir) {
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ir_rvalue *param = (ir_rvalue *)iter.get();
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param->accept(this);
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parameters.push_tail(this->result);
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}
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this->result = new ir_call(ir->get_callee(), ¶meters);
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}
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void
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ir_function_cloning_visitor::visit(ir_return *ir)
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{
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ir_rvalue *rval;
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assert(this->retval);
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rval = ir->get_value();
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rval->accept(this);
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rval = this->result->as_rvalue();
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assert(rval);
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result = new ir_assignment(new ir_dereference(this->retval),
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ir->get_value(), NULL);
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}
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void
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ir_function_cloning_visitor::visit(ir_if *ir)
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{
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/* FINISHME: Implement if cloning. */
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assert(0);
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(void) ir;
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result = NULL;
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}
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bool
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automatic_inlining_predicate(ir_instruction *ir)
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{
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ir_call *call = ir->as_call();
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if (call && can_inline(call))
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return true;
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return false;
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}
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bool
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do_function_inlining(exec_list *instructions)
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{
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bool progress = false;
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do_expression_flattening(instructions, automatic_inlining_predicate);
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foreach_iter(exec_list_iterator, iter, *instructions) {
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ir_instruction *ir = (ir_instruction *)iter.get();
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ir_assignment *assign = ir->as_assignment();
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ir_call *call;
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if (assign) {
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call = assign->rhs->as_call();
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if (!call || !can_inline(call))
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continue;
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/* generates the parameter setup, function body, and returns the return
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* value of the function
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*/
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ir_rvalue *rhs = call->generate_inline(ir);
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assert(rhs);
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assign->rhs = rhs;
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progress = true;
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} else if ((call = ir->as_call()) && can_inline(call)) {
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(void)call->generate_inline(ir);
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ir->remove();
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progress = true;
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} else {
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ir_function_inlining_visitor v;
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ir->accept(&v);
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}
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}
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return progress;
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}
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ir_rvalue *
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ir_call::generate_inline(ir_instruction *next_ir)
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{
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ir_variable **parameters;
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int num_parameters;
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int i;
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ir_variable *retval = NULL;
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num_parameters = 0;
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foreach_iter(exec_list_iterator, iter_sig, this->callee->parameters)
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num_parameters++;
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parameters = new ir_variable *[num_parameters];
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/* Generate storage for the return value. */
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if (this->callee->return_type) {
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retval = new ir_variable(this->callee->return_type, "__retval");
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next_ir->insert_before(retval);
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}
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ir_function_cloning_visitor v = ir_function_cloning_visitor(retval);
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/* Generate the declarations for the parameters to our inlined code,
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* and set up the mapping of real function body variables to ours.
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*/
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i = 0;
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exec_list_iterator sig_param_iter = this->callee->parameters.iterator();
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exec_list_iterator param_iter = this->actual_parameters.iterator();
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for (i = 0; i < num_parameters; i++) {
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const ir_variable *const sig_param = (ir_variable *) sig_param_iter.get();
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ir_rvalue *param = (ir_rvalue *) param_iter.get();
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/* Generate a new variable for the parameter. */
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parameters[i] = sig_param->clone();
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next_ir->insert_before(parameters[i]);
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v.remap_variable(sig_param, parameters[i]);
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/* Move the actual param into our param variable if it's an 'in' type. */
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if (parameters[i]->mode == ir_var_in ||
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parameters[i]->mode == ir_var_inout) {
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ir_assignment *assign;
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assign = new ir_assignment(new ir_dereference(parameters[i]),
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param, NULL);
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next_ir->insert_before(assign);
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}
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sig_param_iter.next();
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param_iter.next();
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}
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/* Generate the inlined body of the function. */
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foreach_iter(exec_list_iterator, iter, callee->body) {
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ir_instruction *ir = (ir_instruction *)iter.get();
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ir->accept(&v);
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assert(v.result);
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next_ir->insert_before(v.result);
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}
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/* Generate the declarations for the parameters to our inlined code,
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* and set up the mapping of real function body variables to ours.
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*/
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i = 0;
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param_iter = this->actual_parameters.iterator();
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for (i = 0; i < num_parameters; i++) {
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ir_instruction *const param = (ir_instruction *) param_iter.get();
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/* Move the actual param into our param variable if it's an 'in' type. */
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if (parameters[i]->mode == ir_var_out ||
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parameters[i]->mode == ir_var_inout) {
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ir_assignment *assign;
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assign = new ir_assignment(param->as_rvalue(),
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new ir_dereference(parameters[i]),
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NULL);
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next_ir->insert_before(assign);
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}
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param_iter.next();
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}
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delete(parameters);
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if (retval)
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return new ir_dereference(retval);
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else
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return NULL;
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}
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void
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ir_function_inlining_visitor::visit(ir_variable *ir)
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{
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(void) ir;
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}
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void
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ir_function_inlining_visitor::visit(ir_loop *ir)
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{
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do_function_inlining(&ir->body_instructions);
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}
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void
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ir_function_inlining_visitor::visit(ir_loop_jump *ir)
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{
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(void) ir;
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}
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void
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ir_function_inlining_visitor::visit(ir_function_signature *ir)
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{
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do_function_inlining(&ir->body);
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}
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void
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ir_function_inlining_visitor::visit(ir_function *ir)
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{
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foreach_iter(exec_list_iterator, iter, *ir) {
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ir_function_signature *const sig = (ir_function_signature *) iter.get();
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sig->accept(this);
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}
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}
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void
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ir_function_inlining_visitor::visit(ir_expression *ir)
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{
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unsigned int operand;
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for (operand = 0; operand < ir->get_num_operands(); operand++) {
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ir->operands[operand]->accept(this);
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}
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}
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void
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ir_function_inlining_visitor::visit(ir_swizzle *ir)
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{
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ir->val->accept(this);
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}
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void
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ir_function_inlining_visitor::visit(ir_dereference *ir)
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{
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if (ir->mode == ir_dereference::ir_reference_array) {
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ir->selector.array_index->accept(this);
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}
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ir->var->accept(this);
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}
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void
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ir_function_inlining_visitor::visit(ir_assignment *ir)
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{
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ir->rhs->accept(this);
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}
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void
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ir_function_inlining_visitor::visit(ir_constant *ir)
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{
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(void) ir;
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}
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void
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ir_function_inlining_visitor::visit(ir_call *ir)
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{
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(void) ir;
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}
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void
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ir_function_inlining_visitor::visit(ir_return *ir)
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{
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(void) ir;
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}
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void
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ir_function_inlining_visitor::visit(ir_if *ir)
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{
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ir->condition->accept(this);
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do_function_inlining(&ir->then_instructions);
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do_function_inlining(&ir->else_instructions);
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}
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