本文整理汇总了C++中DomTreeNode::getLevel方法的典型用法代码示例。如果您正苦于以下问题：C++ DomTreeNode::getLevel方法的具体用法？C++ DomTreeNode::getLevel怎么用？C++ DomTreeNode::getLevel使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类DomTreeNode的用法示例。
在下文中一共展示了DomTreeNode::getLevel方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: while
void IDFCalculator<NodeTy>::calculate(
SmallVectorImpl<BasicBlock *> &PHIBlocks) {
// Use a priority queue keyed on dominator tree level so that inserted nodes
// are handled from the bottom of the dominator tree upwards.
typedef std::pair<DomTreeNode *, unsigned> DomTreeNodePair;
typedef std::priority_queue<DomTreeNodePair, SmallVector<DomTreeNodePair, 32>,
less_second> IDFPriorityQueue;
IDFPriorityQueue PQ;
for (BasicBlock *BB : *DefBlocks) {
if (DomTreeNode *Node = DT.getNode(BB))
PQ.push({Node, Node->getLevel()});
}
SmallVector<DomTreeNode *, 32> Worklist;
SmallPtrSet<DomTreeNode *, 32> VisitedPQ;
SmallPtrSet<DomTreeNode *, 32> VisitedWorklist;
while (!PQ.empty()) {
DomTreeNodePair RootPair = PQ.top();
PQ.pop();
DomTreeNode *Root = RootPair.first;
unsigned RootLevel = RootPair.second;
// Walk all dominator tree children of Root, inspecting their CFG edges with
// targets elsewhere on the dominator tree. Only targets whose level is at
// most Root's level are added to the iterated dominance frontier of the
// definition set.
Worklist.clear();
Worklist.push_back(Root);
VisitedWorklist.insert(Root);
while (!Worklist.empty()) {
DomTreeNode *Node = Worklist.pop_back_val();
BasicBlock *BB = Node->getBlock();
// Succ is the successor in the direction we are calculating IDF, so it is
// successor for IDF, and predecessor for Reverse IDF.
for (auto *Succ : children<NodeTy>(BB)) {
DomTreeNode *SuccNode = DT.getNode(Succ);
// Quickly skip all CFG edges that are also dominator tree edges instead
// of catching them below.
if (SuccNode->getIDom() == Node)
continue;
const unsigned SuccLevel = SuccNode->getLevel();
if (SuccLevel > RootLevel)
continue;
if (!VisitedPQ.insert(SuccNode).second)
continue;
BasicBlock *SuccBB = SuccNode->getBlock();
if (useLiveIn && !LiveInBlocks->count(SuccBB))
continue;
PHIBlocks.emplace_back(SuccBB);
if (!DefBlocks->count(SuccBB))
PQ.push(std::make_pair(SuccNode, SuccLevel));
}
for (auto DomChild : *Node) {
if (VisitedWorklist.insert(DomChild).second)
Worklist.push_back(DomChild);
}
}
}
}