mirror of https://gitlab.freedesktop.org/mesa/mesa
126 lines
3.9 KiB
C++
126 lines
3.9 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_import_prototypes.cpp
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* Import function prototypes from one IR tree into another.
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*
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* \author Ian Romanick
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*/
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#include "ir.h"
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#include "glsl_symbol_table.h"
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namespace {
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/**
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* Visitor used to import function prototypes
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*
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* Normally the \c clone method of either \c ir_function or
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* \c ir_function_signature could be used. However, we don't want a complete
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* clone of the \c ir_function_signature. We want everything \b except the
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* body of the function.
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*/
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class import_prototype_visitor : public ir_hierarchical_visitor {
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public:
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/**
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*/
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import_prototype_visitor(exec_list *list, glsl_symbol_table *symbols,
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void *mem_ctx)
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{
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this->mem_ctx = mem_ctx;
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this->list = list;
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this->symbols = symbols;
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this->function = NULL;
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}
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virtual ir_visitor_status visit_enter(ir_function *ir)
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{
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assert(this->function == NULL);
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this->function = this->symbols->get_function(ir->name);
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if (!this->function) {
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this->function = new(this->mem_ctx) ir_function(ir->name);
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list->push_tail(this->function);
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/* Add the new function to the symbol table.
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*/
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this->symbols->add_function(this->function);
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}
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return visit_continue;
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}
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virtual ir_visitor_status visit_leave(ir_function *ir)
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{
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(void) ir;
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assert(this->function != NULL);
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this->function = NULL;
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return visit_continue;
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}
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ir_visitor_status visit_enter(ir_function_signature *ir)
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{
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assert(this->function != NULL);
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ir_function_signature *copy = ir->clone_prototype(mem_ctx, NULL);
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this->function->add_signature(copy);
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/* Do not process child nodes of the ir_function_signature. There can
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* never be any nodes inside the ir_function_signature that we care
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* about. Instead continue with the next sibling.
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*/
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return visit_continue_with_parent;
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}
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private:
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exec_list *list;
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ir_function *function;
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glsl_symbol_table *symbols;
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void *mem_ctx;
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};
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} /* anonymous namespace */
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/**
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* Import function prototypes from one IR tree into another
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*
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* \param source Source instruction stream containing functions whose
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* prototypes are to be imported
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* \param dest Destination instruction stream where new \c ir_function and
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* \c ir_function_signature nodes will be stored
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* \param symbols Symbol table where new functions will be stored
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* \param mem_ctx ralloc memory context used for new allocations
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*/
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void
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import_prototypes(const exec_list *source, exec_list *dest,
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glsl_symbol_table *symbols, void *mem_ctx)
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{
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import_prototype_visitor v(dest, symbols, mem_ctx);
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/* Making source be const is just extra documentation.
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*/
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v.run(const_cast<exec_list *>(source));
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}
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