diff --git a/src/jit/impl/fusion_pass.cpp b/src/jit/impl/fusion_pass.cpp
index 4a606711..1887b938 100644
--- a/src/jit/impl/fusion_pass.cpp
+++ b/src/jit/impl/fusion_pass.cpp
@@ -33,16 +33,16 @@ class JITFusionPass::Impl final {
     CompNode::UnorderedMap<size_t> m_cn2max_nr_input;
 
     SubGraph::Rewriter m_rewriter;
-    SmallVector<std::unique_ptr<InternalGraphGenrator>> m_igraph_gen_storage;
-    ThinHashMap<VarNode*, InternalGraphGenrator*> m_var2igraph_gen;
+    SmallVector<std::unique_ptr<InternalGraphGenerator>> m_igraph_gen_storage;
+    ThinHashMap<VarNode*, InternalGraphGenerator*> m_var2igraph_gen;
 
     //! map from var to its reader oprs and the corresponding dependency types
     ThinHashMap<VarNode*, SmallVector<std::pair<OperatorNodeBase*, DepType>>>
             m_var_readers;
     ThinHashSet<VarNode*> m_endpoint_set;
 
-    //! create a new InternalGraphGenrator rooted at given opr
-    InternalGraphGenrator* create_new_igraph_gen(OperatorNodeBase* opr);
+    //! create a new InternalGraphGenerator rooted at given opr
+    InternalGraphGenerator* create_new_igraph_gen(OperatorNodeBase* opr);
 
     //! process a single operator, maintaining m_var2igraph_gen
     void process_opr(OperatorNodeBase* opr);
@@ -51,11 +51,11 @@ class JITFusionPass::Impl final {
 
     //! check whether all oprs which depend on the var are in i_graph
     bool test_all_readers_in_the_graph(VarNode* var,
-                                       InternalGraphGenrator* i_graph);
+                                       InternalGraphGenerator* i_graph);
 
     //! check shape to determine whether the opr should be added to the internal
     //! graph
-    bool check_shape(cg::OperatorNodeBase* opr, InternalGraphGenrator* i_graph);
+    bool check_shape(cg::OperatorNodeBase* opr, InternalGraphGenerator* i_graph);
 
     //! use m_rewriter to update graph
     void update_graph();
@@ -155,7 +155,7 @@ void JITFusionPass::Impl::update_graph() {
 }
 
 bool JITFusionPass::Impl::test_all_readers_in_the_graph(
-        VarNode* var, InternalGraphGenrator* ig_gen) {
+        VarNode* var, InternalGraphGenerator* ig_gen) {
     for (auto&& reader : m_var_readers.at(var)) {
         if (reader.second & DepType::DEV_VALUE) {
             if (ig_gen->opr_set().count(reader.first) == 0) {
@@ -167,7 +167,7 @@ bool JITFusionPass::Impl::test_all_readers_in_the_graph(
 }
 
 bool JITFusionPass::Impl::check_shape(cg::OperatorNodeBase* opr,
-                                      InternalGraphGenrator* ig_gen) {
+                                      InternalGraphGenerator* ig_gen) {
     if (!cg::is_static_var_shape(opr->output(0))) {
         // currently we do not handle dynamic shape in JIT
         return false;
@@ -249,9 +249,9 @@ bool JITFusionPass::Impl::check_shape(cg::OperatorNodeBase* opr,
     }
 }
 
-InternalGraphGenrator* JITFusionPass::Impl::create_new_igraph_gen(
+InternalGraphGenerator* JITFusionPass::Impl::create_new_igraph_gen(
         OperatorNodeBase* opr) {
-    auto uptr = std::make_unique<InternalGraphGenrator>(opr);
+    auto uptr = std::make_unique<InternalGraphGenerator>(opr);
     auto ptr = uptr.get();
     m_igraph_gen_storage.emplace_back(std::move(uptr));
     m_var2igraph_gen[opr->output(0)] = ptr;
@@ -267,7 +267,7 @@ void JITFusionPass::Impl::process_opr(OperatorNodeBase* opr) {
     }
     // dimshuffle should not be an endpoint, because megbrain has lazy
     // dimshuffle machanism
-    InternalGraphGenrator* ig_gen = nullptr;
+    InternalGraphGenerator* ig_gen = nullptr;
     if (m_var2igraph_gen.count(opr->output(0)) == 0) {
         // because of the reverse traversal, when an operator is being
         // processed but not in m_var2igraph_gen, means it is a endpoint of a
diff --git a/src/jit/impl/internal_graph.cpp b/src/jit/impl/internal_graph.cpp
index 6a726e4e..4c257170 100644
--- a/src/jit/impl/internal_graph.cpp
+++ b/src/jit/impl/internal_graph.cpp
@@ -81,12 +81,12 @@ InternalGraphPtr expand_executor_opr(const InternalGraphPtr& prev_igraph) {
 
 }  // namespace
 
-InternalGraphGenrator::InternalGraphGenrator(cg::OperatorNodeBase* opr)
+InternalGraphGenerator::InternalGraphGenerator(cg::OperatorNodeBase* opr)
         : m_output{opr->output(0)} {
     add_opr(opr);
 }
 
-VarNode* InternalGraphGenrator::replace_graph_by_placeholder() {
+VarNode* InternalGraphGenerator::replace_graph_by_placeholder() {
     ThinHashMap<VarNode*, VarNode*> old2new;
     auto cpu_default = CompNode::default_cpu();
     auto igraph_copy_opr_shallow = [cpu_default](OperatorNodeBase* opr,
@@ -163,7 +163,7 @@ VarNode* InternalGraphGenrator::replace_graph_by_placeholder() {
     return old2new.at(m_output);
 }
 
-InternalGraphPtr InternalGraphGenrator::generate() {
+InternalGraphPtr InternalGraphGenerator::generate() {
     m_input_idx = 0;
 
     auto new_nd = replace_graph_by_placeholder();
@@ -172,7 +172,7 @@ InternalGraphPtr InternalGraphGenrator::generate() {
     return expand_executor_opr(igraph);
 }
 
-size_t InternalGraphGenrator::get_cnt_input_if_add(
+size_t InternalGraphGenerator::get_cnt_input_if_add(
         cg::OperatorNodeBase* opr) const {
     // minus 1 first because this opr should be removed from subgraph's input
     size_t new_cnt_input = m_graph_input_set.size() - 1;
@@ -183,7 +183,7 @@ size_t InternalGraphGenrator::get_cnt_input_if_add(
     return new_cnt_input;
 }
 
-void InternalGraphGenrator::add_opr(cg::OperatorNodeBase* opr) {
+void InternalGraphGenerator::add_opr(cg::OperatorNodeBase* opr) {
     if (m_opr_set.count(opr)) {
         // ignore duplicated oprs (which occur in tests)
         return;
@@ -253,7 +253,7 @@ void InternalGraphGenrator::add_opr(cg::OperatorNodeBase* opr) {
     }
 }
 
-void InternalGraphGenrator::find_reduce_opr_deps(cg::OperatorNodeBase* opr) {
+void InternalGraphGenerator::find_reduce_opr_deps(cg::OperatorNodeBase* opr) {
     mgb_assert(opr->same_type<opr::Reduce>() ||
                (opr->same_type<jit::JITExecutor>() &&
                 try_cast_as_op<jit::JITExecutor>(opr)->has_reduce()));
@@ -264,7 +264,7 @@ void InternalGraphGenrator::find_reduce_opr_deps(cg::OperatorNodeBase* opr) {
     cg::DepOprIter{cb}.add(opr);
 }
 
-void InternalGraphGenrator::find_oprs_depended_by_dimshuffle(
+void InternalGraphGenerator::find_oprs_depended_by_dimshuffle(
         cg::OperatorNodeBase* dimshuffle) {
     mgb_assert(
             dimshuffle->same_type<opr::Dimshuffle>() ||
@@ -287,7 +287,7 @@ void InternalGraphGenrator::find_oprs_depended_by_dimshuffle(
     cg::DepOprIter{cb}.add(dimshuffle);
 }
 
-PlaceholderArray InternalGraphGenrator::to_placeholder_opr_arr(
+PlaceholderArray InternalGraphGenerator::to_placeholder_opr_arr(
         const VarNodeArray& vars) {
     PlaceholderArray ret(vars.size());
     for (size_t i = 0; i < vars.size(); ++i) {
diff --git a/src/jit/include/megbrain/jit/internal_graph.h b/src/jit/include/megbrain/jit/internal_graph.h
index 489bfcd6..5b41d0df 100644
--- a/src/jit/include/megbrain/jit/internal_graph.h
+++ b/src/jit/include/megbrain/jit/internal_graph.h
@@ -76,12 +76,12 @@ private:
  * This object stores intermediate state during visiting the computing graph in
  * JITFusionPass.
  *
- * The graph is iterated in reverse topological order. InternalGraphGenrator
+ * The graph is iterated in reverse topological order. InternalGraphGenerator
  * starts with a single operator (i.e. the output node of the fused opr), and
  * new oprs are gradually added into it. Thus the process is expanding a tree
  * rooted at the output node.
  */
-class InternalGraphGenrator {
+class InternalGraphGenerator {
     //! replace oprs in the graph of m_output and populate m_orig_inps,
     //! m_placeholders
     VarNode* replace_graph_by_placeholder();
@@ -95,7 +95,7 @@ class InternalGraphGenrator {
     void find_oprs_depended_by_dimshuffle(cg::OperatorNodeBase* opr);
 
 public:
-    explicit InternalGraphGenrator(cg::OperatorNodeBase* opr);
+    explicit InternalGraphGenerator(cg::OperatorNodeBase* opr);
 
     //! generate the graph; this method can be called multiple times
     InternalGraphPtr generate();
diff --git a/src/jit/test/codegen.cpp b/src/jit/test/codegen.cpp
index 9e823089..bcafdc35 100644
--- a/src/jit/test/codegen.cpp
+++ b/src/jit/test/codegen.cpp
@@ -54,7 +54,7 @@ void run<simple>(Backend backend, CompNode cn) {
 
     VarNodeArray inputs{a.node(), b.node(), c.node()}, outputs{y.node()};
     auto ig_gen =
-            std::make_unique<InternalGraphGenrator>(y.node()->owner_opr());
+            std::make_unique<InternalGraphGenerator>(y.node()->owner_opr());
 
     for (auto i : get_rev_topo_order(y)) {
         if (!i->same_type<opr::Host2DeviceCopy>()) {
@@ -91,7 +91,7 @@ void run<grad>(Backend backend, CompNode cn) {
 
     VarNodeArray inputs{a.node(), b.node(), c.node()}, outputs{y.node()};
     auto ig_gen =
-            std::make_unique<InternalGraphGenrator>(y.node()->owner_opr());
+            std::make_unique<InternalGraphGenerator>(y.node()->owner_opr());
 
     for (auto i : get_rev_topo_order(y)) {
         if (!i->same_type<opr::Host2DeviceCopy>()) {
diff --git a/src/jit/test/fusion.cpp b/src/jit/test/fusion.cpp
index 2130bae5..60a4a7ac 100644
--- a/src/jit/test/fusion.cpp
+++ b/src/jit/test/fusion.cpp
@@ -540,7 +540,7 @@ void run<expand_jit_executor>(Backend backend, CompNode cn) {
 
     auto make_jit = [](SymbolVar target, const SymbolVarArray& inputs) {
         auto y = target.node();
-        auto ig_gen = std::make_unique<InternalGraphGenrator>(y->owner_opr());
+        auto ig_gen = std::make_unique<InternalGraphGenerator>(y->owner_opr());
         auto inputs_vptr = cg::to_var_node_array(inputs);
         for (auto i : get_rev_topo_order(
                      target, {inputs_vptr.begin(), inputs_vptr.end()})) {
@@ -830,9 +830,9 @@ TEST(TestJITFusionHalide, JITExecutor) {
          y = opr::reduce_sum(a + b, shape_of_b),
          z = opr::reduce_sum(a * b, shape_of_a);
     auto ig_gen_1 =
-            std::make_unique<InternalGraphGenrator>(y.node()->owner_opr());
+            std::make_unique<InternalGraphGenerator>(y.node()->owner_opr());
     auto ig_gen_2 =
-            std::make_unique<InternalGraphGenrator>(z.node()->owner_opr());
+            std::make_unique<InternalGraphGenerator>(z.node()->owner_opr());
     {
         ThinHashSet<VarNode*> nd_set;
         nd_set.insert(a.node());
diff --git a/src/jit/test/helper.cpp b/src/jit/test/helper.cpp
index e9ada456..6889c04d 100644
--- a/src/jit/test/helper.cpp
+++ b/src/jit/test/helper.cpp
@@ -85,7 +85,7 @@ void FusionChecker::ensure_init_graph() {
 
     SymbolVar jit_y;
     if (m_direct_build) {
-        auto ig_gen = std::make_unique<InternalGraphGenrator>(
+        auto ig_gen = std::make_unique<InternalGraphGenerator>(
                 m_truth_y.node()->owner_opr());
         ThinHashSet<VarNode*> endpoints_set;
         for (size_t i = 0; i < m_nr_input; ++i) {