From 6242c6f724c9b011b38eb835b2ef2eeb265623e9 Mon Sep 17 00:00:00 2001
From: "Duncan P. N. Exon Smith" <dexonsmith@apple.com>
Date: Sat, 27 Jun 2015 00:15:32 +0000
Subject: [PATCH] Plug a leak introduced by r240848

Apparently this obvious leak was never exercised before, but r240848
exposed it.  Plug it.

http://lab.llvm.org:8011/builders/sanitizer-x86_64-linux-fast/builds/5075

llvm-svn: 240865
---
 lib/IR/AsmWriter.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/lib/IR/AsmWriter.cpp b/lib/IR/AsmWriter.cpp
index 7efb8e2bc7b..fdfed9ee5ad 100644
--- a/lib/IR/AsmWriter.cpp
+++ b/lib/IR/AsmWriter.cpp
@@ -1941,8 +1941,11 @@ static void WriteAsOperandInternal(raw_ostream &Out, const Metadata *MD,
                                    SlotTracker *Machine, const Module *Context,
                                    bool FromValue) {
   if (const MDNode *N = dyn_cast<MDNode>(MD)) {
-    if (!Machine)
-      Machine = new SlotTracker(Context);
+    std::unique_ptr<SlotTracker> MachineStorage;
+    if (!Machine) {
+      MachineStorage = make_unique<SlotTracker>(Context);
+      Machine = MachineStorage.get();
+    }
     int Slot = Machine->getMetadataSlot(N);
     if (Slot == -1)
       // Give the pointer value instead of "badref", since this comes up all