[PassManager] Ensure destructors of cached AnalysisUsage objects are run

In 254760, I introduced the usage of a BumpPtrAllocator for the AnalysisUsage instances held by the PassManger.  This turns out to have been incorrect since a BumpPtrAllocator does not run the destructors of objects when deallocating memory.  Since a few of our SmallVector's had grown beyond their small size, we end up with some leaked memory.  We need to use a SpecificBumpPtrAllocator instead.

llvm-svn: 254803

1 files changed, 1 insertions, 1 deletions

diff --git a/llvm/lib/IR/LegacyPassManager.cpp b/llvm/lib/IR/LegacyPassManager.cpp
index 08e8906e88d..f2e0c7d32c0 100644
--- a/llvm/lib/IR/LegacyPassManager.cpp
+++ b/llvm/lib/IR/LegacyPassManager.cpp
@@ -589,7 +589,7 @@ AnalysisUsage *PMTopLevelManager::findAnalysisUsage(Pass *P) {
     if (auto *N = UniqueAnalysisUsages.FindNodeOrInsertPos(ID, IP))
       Node = N;
     else {
-      Node = new (AUFoldingSetNodeAllocator) AUFoldingSetNode(AU);
+      Node = new (AUFoldingSetNodeAllocator.Allocate()) AUFoldingSetNode(AU);
       UniqueAnalysisUsages.InsertNode(Node, IP);
     }
     assert(Node && "cached analysis usage must be non null");