From: Daniel Berlin <dberlin@dberlin.org>
Date: Fri, 20 Mar 2015 18:05:49 +0000 (+0000)
Subject: Small optimization to avoid getting pass info when we will not run loop
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=e7cec1e8539e8b5166932ede537fa6c6940823d0;p=oota-llvm.git

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
---

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;