From fe3c2e006d632a6058e848d16821cdf772785487 Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Tue, 8 Oct 2002 21:31:56 +0000 Subject: [PATCH] By default PHINode::removeIncomingValue will delete the phi node if the last incoming value is deleted! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4076 91177308-0d34-0410-b5e6-96231b3b80d8 --- include/llvm/iPHINode.h | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/include/llvm/iPHINode.h b/include/llvm/iPHINode.h index 93b6e7cc80e..4e217e971e8 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. -- 2.34.1