void TR_LocalLiveRangeReduction::populatePotentialDeps(TR_TreeRefInfo *treeRefInfo,TR::Node *node)
{
TR::ILOpCode &opCode = node->getOpCode();
if (node->getOpCode().hasSymbolReference())
{
TR::SymbolReference *symRef = node->getSymbolReference();
int32_t symRefNum = symRef->getReferenceNumber();
//set defSym - all symbols that might be written
if (opCode.isCall() || opCode.isResolveCheck()|| opCode.isStore() || node->mightHaveVolatileSymbolReference())
{
bool isCallDirect = false;
if (node->getOpCode().isCallDirect())
isCallDirect = true;
if (!symRef->getUseDefAliases(isCallDirect).isZero(comp()))
{
TR::SparseBitVector useDefAliases(comp()->allocator());
symRef->getUseDefAliases(isCallDirect).getAliases(useDefAliases);
TR::SparseBitVector::Cursor aliasCursor(useDefAliases);
for (aliasCursor.SetToFirstOne(); aliasCursor.Valid(); aliasCursor.SetToNextOne())
{
int32_t nextAlias = aliasCursor;
treeRefInfo->getDefSym()->set(nextAlias);
}
}
if (opCode.isStore())
treeRefInfo->getDefSym()->set(symRefNum);
}
//set useSym - all symbols that are used
if (opCode.canRaiseException())
{
TR::SparseBitVector useAliases(comp()->allocator());
symRef->getUseonlyAliases().getAliases(useAliases);
{
TR::SparseBitVector::Cursor aliasesCursor(useAliases);
for (aliasesCursor.SetToFirstOne(); aliasesCursor.Valid(); aliasesCursor.SetToNextOne())
{
int32_t nextAlias = aliasesCursor;
treeRefInfo->getUseSym()->set(nextAlias);
}
}
}
if (opCode.isLoadVar() || (opCode.getOpCodeValue() == TR::loadaddr))
{
treeRefInfo->getUseSym()->set(symRefNum);
}
}
for (int32_t i = 0; i < node->getNumChildren(); i++)
{
TR::Node *child = node->getChild(i);
//don't recurse over references (nodes which are not the first reference)
//
if (child->getReferenceCount()==1 || treeRefInfo->getFirstRefNodesList()->find(child))
populatePotentialDeps(treeRefInfo,child );
}
return;
}
