void
TR::RegDepCopyRemoval::updateSingleRegDep(TR_GlobalRegisterNumber reg, TR::Node *newValueNode)
{
RegDepInfo &dep = getRegDepInfo(reg);
TR_ASSERT(_treetop->getNode()->getOpCodeValue() != TR::BBStart, "attempted to change %s in incoming GlRegDeps on BBStart n%un\n", registerName(reg), _treetop->getNode()->getGlobalIndex());
TR::Node *prevChild = _regDeps->getChild(dep.childIndex);
TR_ASSERT(prevChild == dep.node, "childIndex and node inconsistent in RegDepInfo for %s\n", registerName(reg));
TR_ASSERT(prevChild->getGlobalRegisterNumber() == reg, "childIndex and reg inconsistent in RegDepInfo for %s\n", registerName(reg));
if (newValueNode->getOpCode().isLoadReg()
&& newValueNode->getGlobalRegisterNumber() == reg)
{
_regDeps->setAndIncChild(dep.childIndex, newValueNode);
}
else
{
TR::Node *newOutgoingPassThroughNode = TR::Node::create(TR::PassThrough, 1, newValueNode);
newOutgoingPassThroughNode->setGlobalRegisterNumber(reg);
_regDeps->setAndIncChild(dep.childIndex, newOutgoingPassThroughNode);
}
prevChild->recursivelyDecReferenceCount();
rememberNodeChoice(reg, newValueNode);
}
