[IR] Prefer use_empty() to !hasNUsesOrMore(1) for clarity.

llvm-svn: 303218
diff --git a/llvm/lib/Transforms/Scalar/Reassociate.cpp b/llvm/lib/Transforms/Scalar/Reassociate.cpp
index ef29d41..53320bf 100644
--- a/llvm/lib/Transforms/Scalar/Reassociate.cpp
+++ b/llvm/lib/Transforms/Scalar/Reassociate.cpp
@@ -1922,7 +1922,7 @@
 
   // User must be a binary operator with one or more uses.
   Instruction *User = I->user_back();
-  if (!isa<BinaryOperator>(User) || !User->hasNUsesOrMore(1))
+  if (!isa<BinaryOperator>(User) || User->use_empty())
     return nullptr;
 
   unsigned UserOpcode = User->getOpcode();