From 817d4e942bf7e7ef51002eb905e5751b44c51223 Mon Sep 17 00:00:00 2001
From: Michael Gottesman <mgottesman@apple.com>
Date: Sun, 6 Jan 2013 23:39:09 +0000
Subject: [PATCH] [ObjCARC Debug Message] - Added debug message when we add a
 tail keyword to a function which can never be passed stack args.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171675 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 d4e151c02ef..c840e6e4c8c 100644
--- a/lib/Transforms/Scalar/ObjCARC.cpp
+++ b/lib/Transforms/Scalar/ObjCARC.cpp
@@ -2443,6 +2443,9 @@ void ObjCARCOpt::OptimizeIndividualCalls(Function &F) {
     // a tail keyword.
     if (IsAlwaysTail(Class)) {
       Changed = true;
+      DEBUG(dbgs() << "ObjCARCOpt::OptimizeIndividualCalls: Adding tail keyword"
+            " to function since it can never be passed stack args: " << *Inst <<
+            "\n");
       cast<CallInst>(Inst)->setTailCall();
     }