From f93109a9b6843fcbe759e69f360b6e079d46c55e Mon Sep 17 00:00:00 2001
From: Michael Gottesman <mgottesman@apple.com>
Date: Mon, 7 Jan 2013 00:04:56 +0000
Subject: [PATCH] [ObjCARC Debug Message] - Added debug message when we zap a
 matching retain/autorelease pair in ObjCARCOpt::OptimizeReturns.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171678 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Transforms/Scalar/ObjCARC.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/Transforms/Scalar/ObjCARC.cpp b/lib/Transforms/Scalar/ObjCARC.cpp
index 86b99c9eb15..1c1273ca379 100644
--- a/lib/Transforms/Scalar/ObjCARC.cpp
+++ b/lib/Transforms/Scalar/ObjCARC.cpp
@@ -3753,6 +3753,9 @@ void ObjCARCOpt::OptimizeReturns(Function &F) {
           // If so, we can zap the retain and autorelease.
           Changed = true;
           ++NumRets;
+          DEBUG(dbgs() << "ObjCARCOpt::OptimizeReturns: Erasing: " << *Retain
+                       << "\n                             Erasing: "
+                       << *Autorelease << "\n");
           EraseInstruction(Retain);
           EraseInstruction(Autorelease);
         }