diff --git a/llvm/lib/Analysis/LazyValueInfo.cpp b/llvm/lib/Analysis/LazyValueInfo.cpp
index a673b6d..87e7f9b 100644
--- a/llvm/lib/Analysis/LazyValueInfo.cpp
+++ b/llvm/lib/Analysis/LazyValueInfo.cpp
@@ -302,7 +302,7 @@
 ///   contradictory.  If this happens, we return some valid lattice value so as
 ///   not confuse the rest of LVI.  Ideally, we'd always return Undefined, but
 ///   we do not make this guarantee.  TODO: This would be a useful enhancement.
-static LVILatticeVal intersect(LVILatticeVal A, LVILatticeVal B) {
+static LVILatticeVal intersect(const LVILatticeVal &A, const LVILatticeVal &B) {
   // Undefined is the strongest state.  It means the value is known to be along
   // an unreachable path.
   if (A.isUndefined())