From e7cec1e8539e8b5166932ede537fa6c6940823d0 Mon Sep 17 00:00:00 2001
From: Daniel Berlin <dberlin@dberlin.org>
Date: Fri, 20 Mar 2015 18:05:49 +0000
Subject: [PATCH] Small optimization to avoid getting pass info when we will
 not run loop

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@232826 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Analysis/BasicAliasAnalysis.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/Analysis/BasicAliasAnalysis.cpp b/lib/Analysis/BasicAliasAnalysis.cpp
index 1514e78010e..be2282f299f 100644
--- a/lib/Analysis/BasicAliasAnalysis.cpp
+++ b/lib/Analysis/BasicAliasAnalysis.cpp
@@ -1526,6 +1526,9 @@ bool BasicAliasAnalysis::isValueEqualInPotentialCycles(const Value *V,
   if (!Inst)
     return true;
 
+  if (VisitedPhiBBs.empty())
+    return true;
+
   if (VisitedPhiBBs.size() > MaxNumPhiBBsValueReachabilityCheck)
     return false;
 
-- 
2.40.0