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Add a helper function to PHI node
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@1113 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -48,6 +48,9 @@ public:
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inline BasicBlock *getIncomingBlock(unsigned i) {
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return cast<BasicBlock>(Operands[i*2+1]);
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}
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inline void setIncomingBlock(unsigned i, BasicBlock *BB) {
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Operands[i*2+1] = BB;
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}
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// addIncoming - Add an incoming value to the end of the PHI list
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void addIncoming(Value *D, BasicBlock *BB);
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@ -56,6 +59,14 @@ public:
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// predecessor basic block is deleted. The value removed is returned.
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Value *removeIncomingValue(const BasicBlock *BB);
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// getBasicBlockIndex - Return the first index of the specified basic
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// block in the value list for this PHI. Returns -1 if no instance.
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//
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int getBasicBlockIndex(const BasicBlock *BB) const {
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for (unsigned i = 0; i < Operands.size()/2; ++i)
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if (getIncomingBlock(i) == BB) return i;
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return -1;
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}
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// Methods for support type inquiry through isa, cast, and dyn_cast:
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static inline bool classof(const PHINode *) { return true; }
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