LiveRange.cc

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/*
    Copyright (c) 2002-2009 Tampere University.
 
    This file is part of TTA-Based Codesign Environment (TCE).
 
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    copy of this software and associated documentation files (the "Software"),
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    The above copyright notice and this permission notice shall be included in
    all copies or substantial portions of the Software.
 
    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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/**
 * @file LiveRange.cc
 *
 * LiveRange is used to mark one liverange for register renaming purposes.
 *
 * @author Heikki Kultala 2011 (heikki.kultala-no.spam-tut.fi)
 * @note rating: red
 */
 
#include "LiveRange.hh"
 
bool
LiveRange::noneScheduled() const {
    for (DataDependenceGraph::NodeSet::iterator i = writes.begin();
         i != writes.end(); i++) {
        if ((*i)->isScheduled()) {
            return false;
        }
    }
    for (DataDependenceGraph::NodeSet::iterator i = reads.begin();
         i != reads.end(); i++) {
        if ((*i)->isScheduled()) {
            return false;
        }
    }
    for (DataDependenceGraph::NodeSet::iterator i = guards.begin();
         i != guards.end(); i++) {
        if ((*i)->isScheduled()) {
            return false;
        }
    }
    return true;
}
 
TCEString 
LiveRange::toString() const {
    TCEString rv;
    for (DataDependenceGraph::NodeSet::iterator i = writes.begin();
         i != writes.end(); i++) {
        rv << (*i)->toString() << " ";
    }
    for (DataDependenceGraph::NodeSet::iterator i = reads.begin();
         i != reads.end(); i++) {
        rv << (*i)->toString() << " ";
    }
    for (DataDependenceGraph::NodeSet::iterator i = guards.begin();
         i != guards.end(); i++) {
        rv << (*i)->toString() << " ";
    }
    return rv;
}    
 
int
LiveRange::firstCycle() const {
    int fc = INT_MAX;
    for (DataDependenceGraph::NodeSet::iterator i = writes.begin();
         i != writes.end(); i++) {
        if ((*i)->isScheduled()) {
            fc = std::min(fc, (*i)->cycle());
        }
    }
    for (DataDependenceGraph::NodeSet::iterator i = reads.begin();
         i != reads.end(); i++) {
        if ((*i)->isScheduled()) {
            fc = std::min(fc, (*i)->cycle());
 
        }
    }
    for (DataDependenceGraph::NodeSet::iterator i = guards.begin();
         i != guards.end(); i++) {
        if ((*i)->isScheduled()) {
            fc = std::min(fc, (*i)->cycle());
 
        }
    }
    return fc;
}
 
int
LiveRange::lastCycle() const {
    int fc = -1;
    for (DataDependenceGraph::NodeSet::iterator i = writes.begin();
         i != writes.end(); i++) {
        if ((*i)->isScheduled()) {
            fc = std::max(fc, (*i)->cycle());
        }
    }
    for (DataDependenceGraph::NodeSet::iterator i = reads.begin();
         i != reads.end(); i++) {
        if ((*i)->isScheduled()) {
            fc = std::max(fc, (*i)->cycle());
 
        }
    }
    for (DataDependenceGraph::NodeSet::iterator i = guards.begin();
         i != guards.end(); i++) {
        if ((*i)->isScheduled()) {
            fc = std::max(fc, (*i)->cycle());
 
        }
    }
    return fc;
}
 
void
LiveRange::clear() {
    writes.clear();
    reads.clear();
    guards.clear();
}