bool collectSymbolReferencesInNode(TR::Node *node,
TR::SparseBitVector &symbolReferencesInNode,
int32_t *numDeadSubNodes, vcount_t visitCount, TR::Compilation *comp,
bool *seenInternalPointer, bool *seenArraylet,
bool *cantMoveUnderBranch)
{
// The visit count in the node must be maintained by this method.
//
vcount_t oldVisitCount = node->getVisitCount();
if (oldVisitCount == visitCount || oldVisitCount == comp->getVisitCount())
return true;
node->setVisitCount(comp->getVisitCount());
//diagnostic("Walking node %p, height=%d, oldVisitCount=%d, visitCount=%d, compVisitCount=%d\n", node, *height, oldVisitCount, visitCount,comp->getVisitCount());
// For all other subtrees collect all symbols that could be killed between
// here and the next reference.
//
for (int32_t i = node->getNumChildren()-1; i >= 0; i--)
{
TR::Node *child = node->getChild(i);
if (child->getFutureUseCount() == 1 &&
child->getReferenceCount() > 1 &&
!child->getOpCode().isLoadConst())
*numDeadSubNodes = (*numDeadSubNodes) + 1;
collectSymbolReferencesInNode(child, symbolReferencesInNode, numDeadSubNodes, visitCount, comp,
seenInternalPointer, seenArraylet, cantMoveUnderBranch);
}
// detect if this is a direct load that shouldn't be moved under a branch (because an update was moved past
// this load by treeSimplification)
if (cantMoveUnderBranch &&
(node->getOpCode().isLoadVarDirect() || node->getOpCode().isLoadReg()) &&
node->isDontMoveUnderBranch())
*cantMoveUnderBranch = true;
if (seenInternalPointer && node->isInternalPointer() && node->getReferenceCount() > 1)
*seenInternalPointer = true;
if (seenArraylet)
{
if (node->getOpCode().hasSymbolReference() &&
node->getSymbolReference()->getSymbol()->isArrayletShadowSymbol() &&
node->getReferenceCount() > 1)
{
*seenArraylet = true;
}
}
// Add this node's symbol reference to the set
if (node->getOpCode().hasSymbolReference())
{
symbolReferencesInNode[node->getSymbolReference()->getReferenceNumber()]=true;
}
return true;
}
