vector<int> maOrderingFast(const vector<SplitEdge> &g, int s)
{
int addOne = cG(s, g) == 0 ? 1 : 0;
int maxNodeInd = 0;
for (unsigned i = 0; i < g.size(); i++)
maxNodeInd = max(g[i].end0, max(g[i].end1, maxNodeInd));
maxNodeInd++;
vector<bool> usedNodes(maxNodeInd, false);
for (unsigned i = 0; i < g.size(); i++)
{
usedNodes[g[i].end0] = true;
usedNodes[g[i].end1] = true;
}
int numNodes = 0;
for (unsigned i = 0; i < usedNodes.size(); i++)
numNodes += usedNodes[i];
vector<int> ordering;
vector<bool> inOrdering;
for (int i = 0; i < maxNodeInd; i++)
inOrdering.push_back(false);
ordering.push_back(s);
inOrdering[s] = true;
while (ordering.size() != numNodes + addOne)
{
vector<int> dels(maxNodeInd, 0);
for (unsigned i = 0; i < g.size(); i++)
{
if (!inOrdering[g[i].end0] && inOrdering[g[i].end1])
dels[g[i].end0] += g[i].weight;
if (!inOrdering[g[i].end1] && inOrdering[g[i].end0])
dels[g[i].end1] += g[i].weight;
}
for (int i = 0; i < maxNodeInd; i++)
{
if (!usedNodes[i])
dels[i] = -1;
}
int loc = -1;
int maxDel = -1;
for (unsigned i = 0; i < dels.size(); i++)
{
if (dels[i] > maxDel)
{
maxDel = dels[i];
loc = i;
}
}
ordering.push_back(loc);
inOrdering[loc] = true;
}
//verifyMAOrdering(g, ordering);
return ordering;
}
void
TR::RegDepCopyRemoval::processRegDeps(TR::Node *deps, TR::TreeTop *depTT)
{
if (trace())
traceMsg(comp(), "processing GlRegDeps n%un\n", deps->getGlobalIndex());
TR_ASSERT(deps->getOpCodeValue() == TR::GlRegDeps, "processDeps: deps is not GlRegDeps\n");
_treetop = depTT;
_regDeps = deps;
clearRegDepInfo();
readRegDeps();
TR::NodeChecklist usedNodes(comp());
selectNodesToReuse(usedNodes);
selectNodesToCopy(usedNodes);
updateRegDeps(usedNodes);
}
vector<int> maOrderingHeap(const vector<SplitEdge> &g, int s)
{
vector<pair<int, int>> heap; //fst is key/incidence, snd is node ind (matched in MACompare)
int addOne = cG(s, g) == 0 ? 1 : 0;
int maxNodeInd = 0;
for (unsigned i = 0; i < g.size(); i++)
maxNodeInd = max(g[i].end0, max(g[i].end1, maxNodeInd));
maxNodeInd++;
vector<bool> usedNodes(maxNodeInd, false);
for (unsigned i = 0; i < g.size(); i++)
{
usedNodes[g[i].end0] = true;
usedNodes[g[i].end1] = true;
}
int numNodes = 0;
for (unsigned i = 0; i < usedNodes.size(); i++)
numNodes += usedNodes[i];
vector<int> ordering;
vector<bool> inOrdering(maxNodeInd, false);
ordering.push_back(s);
inOrdering[s] = true;
vector<vector<pair<int, int>>> adjacency;
adjacency.reserve(maxNodeInd);
for (int i = 0; i < maxNodeInd; i++)
adjacency.push_back(vector<pair<int, int>>());
for (unsigned i = 0; i < g.size(); i++)
{
adjacency[g[i].end0].push_back(pair<int, int>(g[i].end1, g[i].weight));
adjacency[g[i].end1].push_back(pair<int, int>(g[i].end0, g[i].weight));
}
heap.reserve(maxNodeInd);
for (int i = 0; i < maxNodeInd; i++)
heap.push_back(pair<int, int>(0, i));
for (unsigned i = 0; i < g.size(); i++)
{
if (g[i].end0 == s)
heap[g[i].end1].first += g[i].weight;
else if (g[i].end1 == s)
heap[g[i].end0].first += g[i].weight;
}
vector<int>realValue;
for (unsigned i = 0; i < heap.size(); i++)
realValue.push_back(heap[i].first);
make_heap(heap.begin(), heap.end(), MACompare());
while (ordering.size() != numNodes + addOne)
{
pair<int, int> next = heap.front();
pop_heap(heap.begin(), heap.end());
heap.pop_back();
while (realValue[next.second] != next.first || inOrdering[next.second] || !usedNodes[next.second]) //i.e. this value was changed.
{
next = heap.front();
pop_heap(heap.begin(), heap.end());
heap.pop_back();
}
ordering.push_back(next.second);
inOrdering[next.second] = true;
for (unsigned i = 0; i < adjacency[next.second].size(); i++)
{
int n = adjacency[next.second][i].first;
if (!inOrdering[n])
{
realValue[n] += adjacency[next.second][i].second;
pair<int, int> p(realValue[n], n);
heap.push_back(p);
push_heap(heap.begin(), heap.end());
}
}
}
//verifyMAOrdering(g, ordering);
return ordering;
}