diff options
| -rw-r--r-- | include/llvm/iPHINode.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/include/llvm/iPHINode.h b/include/llvm/iPHINode.h index 93b6e7c..4e217e9 100644 --- a/include/llvm/iPHINode.h +++ b/include/llvm/iPHINode.h @@ -65,7 +65,14 @@ public: /// removeIncomingValue - Remove an incoming value. This is useful if a /// predecessor basic block is deleted. The value removed is returned. - Value *removeIncomingValue(const BasicBlock *BB); + /// + /// If the last incoming value for a PHI node is removed (and DeletePHIIfEmpty + /// is true), the PHI node is destroyed and any uses of it are replaced with + /// dummy values. The only time there should be zero incoming values to a PHI + /// node is when the block is dead, so this strategy is sound. + /// + Value *removeIncomingValue(const BasicBlock *BB, + bool DeletePHIIfEmpty = true); /// getBasicBlockIndex - Return the first index of the specified basic /// block in the value list for this PHI. Returns -1 if no instance. |