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Fix the dominates method to return true if the two nodes are the same. Add
a new properlyDominates method to do what the old one did. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24407 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -306,16 +306,24 @@ public:
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inline Node *getIDom() const { return IDom; }
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inline const std::vector<Node*> &getChildren() const { return Children; }
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/// dominates - Returns true iff this dominates N. Note that this is not a
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/// constant time operation!
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/// properlyDominates - Returns true iff this dominates N and this != N.
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/// Note that this is not a constant time operation!
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///
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inline bool dominates(const Node *N) const {
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bool properlyDominates(const Node *N) const {
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const Node *IDom;
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while ((IDom = N->getIDom()) != 0 && IDom != this)
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N = IDom; // Walk up the tree
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return IDom != 0;
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}
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/// dominates - Returns true iff this dominates N. Note that this is not a
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/// constant time operation!
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///
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inline bool dominates(const Node *N) const {
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if (N == this) return true; // A node trivially dominates itself.
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return properlyDominates(N);
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}
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private:
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inline Node(BasicBlock *BB, Node *iDom) : TheBB(BB), IDom(iDom) {}
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inline Node *addChild(Node *C) { Children.push_back(C); return C; }
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