From 9c9891431be73d0476f4d4237853c5908820496b Mon Sep 17 00:00:00 2001
From: "Duncan P. N. Exon Smith" <dexonsmith@apple.com>
Date: Fri, 25 Apr 2014 04:38:40 +0000
Subject: [PATCH] blockfreq: Document assertion

<rdar://problem/14292693>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207194 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Analysis/BlockFrequencyInfoImpl.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/Analysis/BlockFrequencyInfoImpl.cpp b/lib/Analysis/BlockFrequencyInfoImpl.cpp
index a41ec4527e8..cb92e5bbb11 100644
--- a/lib/Analysis/BlockFrequencyInfoImpl.cpp
+++ b/lib/Analysis/BlockFrequencyInfoImpl.cpp
@@ -485,7 +485,7 @@ static void combineWeight(Weight &W, const Weight &OtherW) {
   }
   assert(W.Type == OtherW.Type);
   assert(W.TargetNode == OtherW.TargetNode);
-  assert(W.Amount < W.Amount + OtherW.Amount);
+  assert(W.Amount < W.Amount + OtherW.Amount && "Unexpected overflow");
   W.Amount += OtherW.Amount;
 }
 static void combineWeightsBySorting(WeightList &Weights) {