diff --git a/src/relay/ir/alpha_equal.cc b/src/relay/ir/alpha_equal.cc
index 96517f8dd445..aa9336b29153 100644
--- a/src/relay/ir/alpha_equal.cc
+++ b/src/relay/ir/alpha_equal.cc
@@ -217,20 +217,20 @@ class AlphaEqualHandler:
     return false;
   }
 
-  bool VisitType_(const GlobalTypeVarNode* op, const Type& t2) final {
-    return GetRef<Type>(op) == t2;
+  bool VisitType_(const GlobalTypeVarNode* lhs, const Type& other) final {
+    return GetRef<Type>(lhs) == other;
   }
 
-  bool VisitType_(const TypeCallNode* op, const Type& t2) final {
-    const TypeCallNode* pt = t2.as<TypeCallNode>();
-    if (pt == nullptr
-        || op->args.size() != pt->args.size()
-        || !TypeEqual(op->func, pt->func)) {
+  bool VisitType_(const TypeCallNode* lhs, const Type& other) final {
+    const TypeCallNode* rhs = other.as<TypeCallNode>();
+    if (rhs == nullptr
+        || lhs->args.size() != rhs->args.size()
+        || !TypeEqual(lhs->func, rhs->func)) {
       return false;
     }
 
-    for (size_t i = 0; i < op->args.size(); ++i) {
-      if (!TypeEqual(op->args[i], pt->args[i])) {
+    for (size_t i = 0; i < lhs->args.size(); ++i) {
+      if (!TypeEqual(lhs->args[i], rhs->args[i])) {
         return false;
       }
     }
@@ -369,8 +369,8 @@ class AlphaEqualHandler:
     }
   }
 
-  bool VisitExpr_(const OpNode* op, const Expr& other) final {
-    return op == other.get();
+  bool VisitExpr_(const OpNode* lhs, const Expr& other) final {
+    return lhs == other.get();
   }
 
   bool VisitExpr_(const ConstantNode* lhs, const Expr& other) final {
@@ -389,80 +389,80 @@ class AlphaEqualHandler:
     }
   }
 
-  bool VisitExpr_(const RefCreateNode* op, const Expr& e2) final {
-    if (const RefCreateNode* nr = e2.as<RefCreateNode>()) {
-      return ExprEqual(op->value, nr->value);
+  bool VisitExpr_(const RefCreateNode* lhs, const Expr& other) final {
+    if (const RefCreateNode* rhs = other.as<RefCreateNode>()) {
+      return ExprEqual(lhs->value, rhs->value);
     } else {
       return false;
     }
   }
 
-  bool VisitExpr_(const RefReadNode* op, const Expr& e2) final {
-    if (const RefReadNode* r = e2.as<RefReadNode>()) {
-      return ExprEqual(op->ref, r->ref);
+  bool VisitExpr_(const RefReadNode* lhs, const Expr& other) final {
+    if (const RefReadNode* rhs = other.as<RefReadNode>()) {
+      return ExprEqual(lhs->ref, rhs->ref);
     } else {
       return false;
     }
   }
 
-  bool VisitExpr_(const RefWriteNode* op, const Expr& e2) final {
-    if (const RefWriteNode* r = e2.as<RefWriteNode>()) {
-      return ExprEqual(op->ref, r->ref) && ExprEqual(op->value, r->value);
+  bool VisitExpr_(const RefWriteNode* lhs, const Expr& other) final {
+    if (const RefWriteNode* rhs = other.as<RefWriteNode>()) {
+      return ExprEqual(lhs->ref, rhs->ref) && ExprEqual(lhs->value, rhs->value);
     } else {
       return false;
     }
   }
 
-  bool VisitExpr_(const ConstructorNode* op, const Expr& e2) final {
-    return GetRef<Expr>(op) == e2;
+  bool VisitExpr_(const ConstructorNode* lhs, const Expr& other) final {
+    return GetRef<Expr>(lhs) == other;
   }
 
-  bool ClauseEqual(const Clause& l, const Clause& r) {
-    return PatternEqual(l->lhs, r->lhs) && ExprEqual(l->rhs, r->rhs);
+  bool ClauseEqual(const Clause& lhs, const Clause& rhs) {
+    return PatternEqual(lhs->lhs, rhs->lhs) && ExprEqual(lhs->rhs, rhs->rhs);
   }
 
-  bool PatternEqual(const Pattern& l, const Pattern& r) {
-    return VisitPattern(l, r);
+  bool PatternEqual(const Pattern& lhs, const Pattern& rhs) {
+    return VisitPattern(lhs, rhs);
   }
 
-  bool VisitPattern_(const PatternWildcardNode* op, const Pattern& r) final {
-    return r.as<PatternWildcardNode>();
+  bool VisitPattern_(const PatternWildcardNode* lhs, const Pattern& other) final {
+    return other.as<PatternWildcardNode>();
   }
 
-  bool VisitPattern_(const PatternVarNode* op, const Pattern& e2) final {
-    if (const auto* r = e2.as<PatternVarNode>()) {
-      return MergeVarDecl(op->var, r->var);
+  bool VisitPattern_(const PatternVarNode* lhs, const Pattern& other) final {
+    if (const auto* rhs = other.as<PatternVarNode>()) {
+      return MergeVarDecl(lhs->var, rhs->var);
     }
     return false;
   }
 
-  bool VisitPattern_(const PatternConstructorNode* op, const Pattern& e2) final {
-    const auto* r = e2.as<PatternConstructorNode>();
-    if (r == nullptr
-        || !ExprEqual(op->constructor, r->constructor)
-        || op->patterns.size() != r->patterns.size()) {
+  bool VisitPattern_(const PatternConstructorNode* lhs, const Pattern& other) final {
+    const auto* rhs = other.as<PatternConstructorNode>();
+    if (rhs == nullptr
+        || !ExprEqual(lhs->constructor, rhs->constructor)
+        || lhs->patterns.size() != rhs->patterns.size()) {
       return false;
     }
 
-    for (size_t i = 0; i < op->patterns.size(); i++) {
-      if (!PatternEqual(op->patterns[i], r->patterns[i])) {
+    for (size_t i = 0; i < lhs->patterns.size(); i++) {
+      if (!PatternEqual(lhs->patterns[i], rhs->patterns[i])) {
         return false;
       }
     }
     return true;
   }
 
-  bool VisitExpr_(const MatchNode* op, const Expr& e2) final {
-    const MatchNode* r = e2.as<MatchNode>();
+  bool VisitExpr_(const MatchNode* lhs, const Expr& other) final {
+    const MatchNode* rhs = other.as<MatchNode>();
 
-    if (r == nullptr
-        || !ExprEqual(op->data, r->data)
-        || op->clauses.size() != r->clauses.size()) {
+    if (rhs == nullptr
+        || !ExprEqual(lhs->data, rhs->data)
+        || lhs->clauses.size() != rhs->clauses.size()) {
       return false;
     }
 
-    for (size_t i = 0; i < op->clauses.size(); ++i) {
-      if (!ClauseEqual(op->clauses[i], r->clauses[i])) {
+    for (size_t i = 0; i < lhs->clauses.size(); ++i) {
+      if (!ClauseEqual(lhs->clauses[i], rhs->clauses[i])) {
         return false;
       }
     }