Small optimization to avoid getting pass info when we will not run loop

llvm-svn: 232826

diff --git a/llvm/lib/Analysis/BasicAliasAnalysis.cpp b/llvm/lib/Analysis/BasicAliasAnalysis.cpp
index 1514e78..be2282f 100644 (file)
--- a/llvm/lib/Analysis/BasicAliasAnalysis.cpp
+++ b/llvm/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;