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[/] [openrisc/] [trunk/] [gnu-stable/] [binutils-2.20.1/] [gold/] [icf.h] - Rev 816
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// icf.h -- Identical Code Folding // Copyright 2009 Free Software Foundation, Inc. // Written by Sriraman Tallam <tmsriram@google.com>. // This file is part of gold. // This program is free software; you can redistribute it and/or modify // it under the terms of the GNU General Public License as published by // the Free Software Foundation; either version 3 of the License, or // (at your option) any later version. // This program is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // You should have received a copy of the GNU General Public License // along with this program; if not, write to the Free Software // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, // MA 02110-1301, USA. #ifndef GOLD_ICF_H #define GOLD_ICF_H #include <vector> #include "elfcpp.h" #include "symtab.h" namespace gold { class Object; class Input_objects; class Symbol_table; typedef std::pair<Object*, unsigned int> Section_id; class Icf { public: struct Section_id_hash { size_t operator()(const Section_id& loc) const { return reinterpret_cast<uintptr_t>(loc.first) ^ loc.second; } }; typedef std::vector<Section_id> Sections_reachable_list; typedef std::vector<Symbol*> Symbol_info; typedef std::vector<std::pair<long long, long long> > Addend_info; typedef Unordered_map<Section_id, Sections_reachable_list, Section_id_hash> Section_list; typedef Unordered_map<Section_id, Symbol_info, Section_id_hash> Symbol_list; typedef Unordered_map<Section_id, Addend_info, Section_id_hash> Addend_list; typedef Unordered_map<Section_id, unsigned int, Section_id_hash> Uniq_secn_id_map; Icf() : id_section_(), section_id_(), kept_section_id_(), num_tracked_relocs(NULL), icf_ready_(false), section_reloc_list_(), symbol_reloc_list_(), addend_reloc_list_() { } // Returns the kept folded identical section corresponding to // dup_obj and dup_shndx. Section_id get_folded_section(Object* dup_obj, unsigned int dup_shndx); // Forms groups of identical sections where the first member // of each group is the kept section during folding. void find_identical_sections(const Input_objects* input_objects, Symbol_table* symtab); // This is set when ICF has been run and the groups of // identical sections have been formed. void icf_ready() { this->icf_ready_ = true; } // Returns true if ICF has been run. bool is_icf_ready() { return this->icf_ready_; } // Unfolds the section denoted by OBJ and SHNDX if folded. void unfold_section(Object* obj, unsigned int shndx); // Returns the kept section corresponding to the // given section. bool is_section_folded(Object* obj, unsigned int shndx); // Returns a map of a section to a list of all sections referenced // by its relocations. Section_list& section_reloc_list() { return this->section_reloc_list_; } // Returns a map of a section to a list of all symbols referenced // by its relocations. Symbol_list& symbol_reloc_list() { return this->symbol_reloc_list_; } // Returns a maps of a section to a list of symbol values and addends // of its relocations. Addend_list& addend_reloc_list() { return this->addend_reloc_list_; } // Returns a mapping of each section to a unique integer. Uniq_secn_id_map& section_to_int_map() { return this->section_id_; } private: // Maps integers to sections. std::vector<Section_id> id_section_; // Does the reverse. Uniq_secn_id_map section_id_; // Given a section id, this maps it to the id of the kept // section. If the id's are the same then this section is // not folded. std::vector<unsigned int> kept_section_id_; unsigned int* num_tracked_relocs; // Flag to indicate if ICF has been run. bool icf_ready_; // These lists are populated by gc_process_relocs in gc.h. Section_list section_reloc_list_; Symbol_list symbol_reloc_list_; Addend_list addend_reloc_list_; }; } // End of namespace gold. #endif
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