StackSlotManager.cpp

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/* src/vm/jit/compiler2/StackSlotManager.cpp - StackSlotManager

   Copyright (C) 2013
   CACAOVM - Verein zur Foerderung der freien virtuellen Maschine CACAO

   This file is part of CACAO.

   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 2, 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.

*/

#include <algorithm>

#include "vm/jit/compiler2/StackSlotManager.hpp"
#include "vm/jit/compiler2/MachineOperand.hpp"
#include "vm/jit/executionstate.hpp"

namespace cacao {
namespace jit {
namespace compiler2 {

StackSlotManager::~StackSlotManager() {
    while (!slots.empty()) {
        ManagedStackSlot *slot = slots.back();
        slots.pop_back();
        delete slot;
    }

    while (!argument_slots.empty()) {
        ManagedStackSlot *slot = argument_slots.back();
        argument_slots.pop_back();
        delete slot;
    }
}

ManagedStackSlot* StackSlotManager::create_slot(Type::TypeID type) {
    slots.push_back(new ManagedStackSlot(this, type));
    return slots.back();
}

ManagedStackSlot* StackSlotManager::create_argument_slot(Type::TypeID type, u4 index) {
    number_of_machine_argument_slots = std::max(number_of_machine_argument_slots, index + 1);
    auto slot = new ManagedStackSlot(this, type);
    slot->set_index(index);
    argument_slots.push_back(slot);
    return slot;
}

void StackSlotManager::finalize() {
    u4 next_index = number_of_machine_argument_slots;
    for (auto slot : slots) {
        slot->set_index(next_index++);
    }
}

u4 StackSlotManager::get_frame_size() const {
    return get_number_of_machine_slots() * SIZE_OF_STACKSLOT;
}

u4 StackSlotManager::get_number_of_machine_slots() const {
    return number_of_machine_argument_slots + slots.size();
}

} // end namespace compiler2
} // end namespace jit
} // end namespace cacao


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