BFUnscheduleFromBody.cc

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/*
    Copyright (c) 2002-2014 Tampere University.
 
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/**
 * @file BFUnscheduleFromBody.cc
 *
 * Definition of BFUnscheduleFromBody class
 *
 * Unschedules a move from the loop body but leaves it to the prolog/epilog.
 *
 * @author Heikki Kultala 2014-2020(heikki.kultala-no.spam-tuni.fi)
 * @note rating: red
 */
 
 
#include "BFUnscheduleFromBody.hh"
#include "Move.hh"
#include "DataDependenceGraph.hh"
#include "Bus.hh"
#include "POMDisassembler.hh"
#include "SimpleResourceManager.hh"
#include "Instruction.hh"
#include "MoveNodeDuplicator.hh"
#include "Terminal.hh"
#include "BF2Scheduler.hh"
 
void BFUnscheduleFromBody::unscheduleOriginal() {
    oldCycle_ = mn_.cycle();
    oldBus_ = &mn_.move().bus();
 
    if (mn_.isSourceOperation()) {
        srcFU_ = &mn_.move().source().functionUnit();
    }
 
    if (mn_.isDestinationOperation()) {
        dstFU_ = &mn_.move().destination().functionUnit();
    }
 
    if (mn_.move().source().isImmediateRegister()) {
        oldImmWriteCycle_ = rm().immediateWriteCycle(mn_);
        immRegIndex_ = mn_.move().source().index();
        immu_ = &mn_.move().source().immediateUnit();
    }
 
#ifdef DEBUG_BUBBLEFISH_SCHEDULER
    for (int i = 0; i < recurseCounter_*2; i++)
        std::cerr << "\t";
 
    std::cerr << "\t\tUnscheduling original: " << mn_.toString()
              << " bus: " << oldBus_->name() << std::endl;
#endif
    rm().unassign(mn_);
#ifdef DEBUG_BUBBLEFISH_SCHEDULER
    if (!rm().canAssign(oldCycle_, mn_, oldBus_, srcFU_, dstFU_,
                   oldImmWriteCycle_)) {
        for (int i = 0; i < recurseCounter_*2; i++)
            std::cerr << "\t";
 
        std::cerr << "\t\tCannot assign to old cycle: " << mn_.toString()
                  << " old cycle: " << oldCycle_ << std::endl;
        ddg().writeToDotFile("cannot_assign_old_cycle.dot");
        if (mn_.isSourceOperation()) {
            std::cerr << "\t\twhole src PO: "
                      << mn_.sourceOperation().toString() << std::endl;
        }
        if (mn_.isDestinationOperation()) {
            std::cerr << "\t\twhole dst PO: "
                      << mn_.destinationOperation().toString() << std::endl;
        }
        assert(false);
    }
#endif
}
 
void BFUnscheduleFromBody::returnOriginal() {
#ifdef DEBUG_BUBBLEFISH_SCHEDULER
    for (int i = 0; i < recurseCounter_*2; i++)
        std::cerr << "\t";
 
    std::cerr << "\t\treturning original: " <<mn_.toString()<<" current bus: "
              << mn_.move().bus().name() << " old bus: " << oldBus_->name()
              << " cycle: " << oldCycle_ << std::endl;
#endif
 
#ifdef DEBUG_BUBBLEFISH_SCHEDULER
    if (!rm().canAssign(oldCycle_, mn_, oldBus_, srcFU_, dstFU_,
                        oldImmWriteCycle_, immu_, immRegIndex_)) {
        std::cerr << "Cannot return to old cycle: " << mn_.toString()
                  << " cycle: " << oldCycle_  << std::endl;
        if (mn_.isDestinationOperation()) {
            std::cerr << "dstPO: " << mn_.destinationOperation().toString()
                      << std::endl;
        }
        if (mn_.isSourceOperation()) {
            std::cerr << "srcPO: " << mn_.sourceOperation().toString()
                      << std::endl;
        }
        std::cerr << "Original bus: " << oldBus_->name() << std::endl;
        ddg().writeToDotFile("cannot_return_old_cycle.dot");
        TTAProgram::Instruction* ins = rm().instruction(oldCycle_);
        for (int i = 0; i < ins->moveCount(); i++) {
            std::cerr << "\t" << POMDisassembler::disassemble(ins->move(i))
                      << " bus: " << ins->move(i).bus().name()
                      << std::endl;
        }
        std::cerr << "ins contains " << ins->immediateCount()
                  << " immediates." << std::endl;
        assert(false);
    }
#endif
    rm().assign(oldCycle_, mn_, oldBus_, srcFU_, dstFU_,
       oldImmWriteCycle_, immu_, immRegIndex_);
}
 
void BFUnscheduleFromBody::undoOnlyMe() {
#ifdef DEBUG_BUBBLEFISH_SCHEDULER
    std::cerr << "BFUnscheudleMove undo" << std::endl;
#endif
    returnOriginal();
}
 
bool
BFUnscheduleFromBody::operator()() {
    unscheduleOriginal();
    return true;
}
 
int BFUnscheduleFromBody::recurseCounter_ = 0;