From 7ab83427af0f77b59941ceba41d509d7d097b065 Mon Sep 17 00:00:00 2001 From: Dimitry Andric Date: Sat, 10 Jun 2017 13:44:06 +0000 Subject: Vendor import of llvm trunk r305145: https://llvm.org/svn/llvm-project/llvm/trunk@305145 --- lib/CodeGen/SelectionDAG/LegalizeDAG.cpp | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'lib/CodeGen/SelectionDAG/LegalizeDAG.cpp') diff --git a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp index da2fb72bec45a..e54eaa3b81bec 100644 --- a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp +++ b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp @@ -4598,6 +4598,14 @@ void SelectionDAG::Legalize() { AssignTopologicalOrder(); SmallPtrSet LegalizedNodes; + // Use a delete listener to remove nodes which were deleted during + // legalization from LegalizeNodes. This is needed to handle the situation + // where a new node is allocated by the object pool to the same address of a + // previously deleted node. + DAGNodeDeletedListener DeleteListener( + *this, + [&LegalizedNodes](SDNode *N, SDNode *E) { LegalizedNodes.erase(N); }); + SelectionDAGLegalize Legalizer(*this, LegalizedNodes); // Visit all the nodes. We start in topological order, so that we see -- cgit v1.2.3