diff --git a/src/meta_schedule/analysis.cc b/src/meta_schedule/analysis.cc
index afb3b75213..31b5c6d69c 100644
--- a/src/meta_schedule/analysis.cc
+++ b/src/meta_schedule/analysis.cc
@@ -26,8 +26,12 @@
 namespace tvm {
 namespace meta_schedule {
 
+/**************** TIR Nodes ****************/
+using tir::BlockNode;
+using tir::ForNode;
+
 bool IsTrivialBinding(const tir::ScheduleState& self, const tir::StmtSRef& block_sref) {
-  const auto* block = TVM_SREF_TO_BLOCK(block, block_sref);
+  const BlockNode* block = TVM_SREF_TO_BLOCK(block, block_sref);
   tir::BlockRealize realize = tir::GetBlockRealize(block_sref);
   Array<tir::StmtSRef> loops = tir::GetLoops(block_sref);
   const Array<PrimExpr>& bindings = realize->iter_values;
@@ -37,7 +41,7 @@ bool IsTrivialBinding(const tir::ScheduleState& self, const tir::StmtSRef& block
   int n = loops.size();
   for (int i = 0; i < n; ++i) {
     const PrimExpr& bind = bindings[i];
-    const auto* loop = TVM_SREF_TO_FOR(loop, loops[i]);
+    const ForNode* loop = TVM_SREF_TO_FOR(loop, loops[i]);
     if (bind.as<tir::VarNode>() != loop->loop_var.get()) {
       return false;
     }
@@ -51,7 +55,7 @@ bool IsSubrootBlock(const tir::ScheduleState& self, const tir::StmtSRef& block_s
 }
 
 bool IsLeafBlock(const tir::ScheduleState& self, const tir::StmtSRef& block_sref) {
-  const auto* block = TVM_SREF_TO_BLOCK(block, block_sref);
+  const BlockNode* block = TVM_SREF_TO_BLOCK(block, block_sref);
   bool no_child = true;
   tir::PreOrderVisit(block->body, [&no_child](const ObjectRef& obj) -> bool {
     if (!no_child) {
@@ -67,7 +71,7 @@ bool IsLeafBlock(const tir::ScheduleState& self, const tir::StmtSRef& block_sref
 }
 
 Array<Integer> GetBlockVarTypes(const tir::ScheduleState& self, const tir::StmtSRef& block_sref) {
-  const auto* block = TVM_SREF_TO_BLOCK(block, block_sref);
+  const BlockNode* block = TVM_SREF_TO_BLOCK(block, block_sref);
   Array<Integer> result;
   for (const tir::IterVar& iter_var : block->iter_vars) {
     int iter_type = iter_var->iter_type;
@@ -77,7 +81,7 @@ Array<Integer> GetBlockVarTypes(const tir::ScheduleState& self, const tir::StmtS
 }
 
 bool IsSpatial(const tir::ScheduleState& self, const tir::StmtSRef& block_sref) {
-  const auto* block = TVM_SREF_TO_BLOCK(block, block_sref);
+  const BlockNode* block = TVM_SREF_TO_BLOCK(block, block_sref);
   for (const tir::IterVar& iter_var : block->iter_vars) {
     if (iter_var->iter_type != tir::IterVarType::kDataPar) {
       return false;
@@ -88,8 +92,8 @@ bool IsSpatial(const tir::ScheduleState& self, const tir::StmtSRef& block_sref)
 
 bool IsOutputBlock(const tir::ScheduleState& self, const tir::StmtSRef& block_sref) {
   tir::StmtSRef parent_sref = tir::GetScopeRoot(block_sref).value();
-  const auto* block = TVM_SREF_TO_BLOCK(block, block_sref);
-  const auto* parent = TVM_SREF_TO_BLOCK(parent, parent_sref);
+  const BlockNode* block = TVM_SREF_TO_BLOCK(block, block_sref);
+  const BlockNode* parent = TVM_SREF_TO_BLOCK(parent, parent_sref);
   if (parent_sref->parent == nullptr) {
     const tir::PrimFuncNode* func = tir::GetRootPrimFunc(self, parent_sref);
     for (const tir::BufferRegion& write : block->writes) {
@@ -112,7 +116,7 @@ bool IsOutputBlock(const tir::ScheduleState& self, const tir::StmtSRef& block_sr
 }
 
 int CountOp(const tir::ScheduleState& self, const tir::StmtSRef& block_sref, const Op& op) {
-  const auto* block = TVM_SREF_TO_BLOCK(block, block_sref);
+  const BlockNode* block = TVM_SREF_TO_BLOCK(block, block_sref);
   int count = 0;
   tir::PostOrderVisit(block->body, [&count, &op](const ObjectRef& obj) {
     if (const auto* call = obj.as<tir::CallNode>()) {
@@ -125,7 +129,7 @@ int CountOp(const tir::ScheduleState& self, const tir::StmtSRef& block_sref, con
 }
 
 bool HasBranch(const tir::ScheduleState& self, const tir::StmtSRef& block_sref) {
-  const auto* block = TVM_SREF_TO_BLOCK(block, block_sref);
+  const BlockNode* block = TVM_SREF_TO_BLOCK(block, block_sref);
   bool has_branch = false;
   arith::Analyzer analyzer;
   auto f_visit = [&has_branch, &analyzer](const ObjectRef& obj) -> bool {
@@ -214,8 +218,8 @@ bool IsElementWiseMatch(const tir::ScheduleState& self, const tir::StmtSRef& pro
                         const tir::StmtSRef& consumer_sref) {
   // Assume consumer is the only consumer of the producer
   tir::StmtSRef parent_sref = tir::GetScopeRoot(producer_sref).value();
-  const auto* producer = TVM_SREF_TO_BLOCK(producer, producer_sref);
-  const auto* consumer = TVM_SREF_TO_BLOCK(consumer, consumer_sref);
+  const BlockNode* producer = TVM_SREF_TO_BLOCK(producer, producer_sref);
+  const BlockNode* consumer = TVM_SREF_TO_BLOCK(consumer, consumer_sref);
   if (producer->writes.empty()) {
     return false;
   }
@@ -285,7 +289,7 @@ bool NeedsMultiLevelTiling(const tir::ScheduleState& self, const tir::StmtSRef&
   if (!IsTrivialBinding(self, block_sref)) {
     return false;
   }
-  const auto* block = TVM_SREF_TO_BLOCK(block, block_sref);
+  const BlockNode* block = TVM_SREF_TO_BLOCK(block, block_sref);
   // Assume complete/reduction block
   if (block->writes.size() != 1) {
     return false;
@@ -333,7 +337,7 @@ bool NeedsMultiLevelTiling(const tir::ScheduleState& self, const tir::StmtSRef&
 
 bool IsStrictlyInlineable(const tir::ScheduleState& self, const tir::StmtSRef& block_sref) {
   static const Op& op_tir_exp = Op::Get("tir.exp");
-  const auto* block = TVM_SREF_TO_BLOCK(block, block_sref);
+  const BlockNode* block = TVM_SREF_TO_BLOCK(block, block_sref);
   // Const tensors are strictly inlineable
   if (block->reads.empty()) {
     return true;
@@ -764,7 +768,7 @@ bool NeedsRFactorOrCrossThreadReduction(const tir::ScheduleState& self,
                                         const tir::StmtSRef& block_sref,
                                         int64_t max_parallel_extent,
                                         int64_t basic_parallel_extent) {
-  const auto* block = TVM_SREF_TO_BLOCK(block, block_sref);
+  const BlockNode* block = TVM_SREF_TO_BLOCK(block, block_sref);
   Array<tir::StmtSRef> loops = tir::GetLoops(block_sref);
 
   // Cond 1. The block is a reduction block and has trivial binding.
@@ -791,9 +795,9 @@ bool NeedsRFactorOrCrossThreadReduction(const tir::ScheduleState& self,
     }
 
     // Cond 4.
-    const auto* loop_i = TVM_SREF_TO_FOR(loop_i, loops[i]);
+    const ForNode* loop_i = TVM_SREF_TO_FOR(loop_i, loops[i]);
     if (i < static_cast<int>(loops.size()) - 1) {
-      const auto* loop_i1 = TVM_SREF_TO_FOR(loop_i1, loops[i + 1]);
+      const ForNode* loop_i1 = TVM_SREF_TO_FOR(loop_i1, loops[i + 1]);
       if (loop_i->body.get() != loop_i1) {
         return false;
       }
diff --git a/src/meta_schedule/space/search_rule.cc b/src/meta_schedule/space/search_rule.cc
index 7956f7f002..406740cbb3 100644
--- a/src/meta_schedule/space/search_rule.cc
+++ b/src/meta_schedule/space/search_rule.cc
@@ -26,6 +26,10 @@
 namespace tvm {
 namespace meta_schedule {
 
+/**************** TIR Nodes ****************/
+using tir::ForNode;
+using tir::BlockNode;
+
 /********** Constructors **********/
 
 SearchRule::SearchRule(String name, SearchRuleNode::FApply apply) {
@@ -962,7 +966,7 @@ class RuleAddRFactor {
                         const BlockRV& block_rv) const {
     // Check the conditions of the rule.
     tir::StmtSRef block_sref = sch->GetSRef(block_rv);
-    const auto* block = TVM_SREF_TO_BLOCK(block, block_sref);
+    const BlockNode* block = TVM_SREF_TO_BLOCK(block, block_sref);
     if (HasAnyAnn(block_sref)) {
       return {sch};
     }
@@ -1041,7 +1045,7 @@ class RuleCrossThreadReduction {
 
     // Check the conditions of the rule.
     const tir::StmtSRef& block_sref = sch->GetSRef(block_rv);
-    const auto* block = TVM_SREF_TO_BLOCK(block, block_sref);
+    const BlockNode* block = TVM_SREF_TO_BLOCK(block, block_sref);
     if (HasAnyAnn(block_sref)) {
       return {sch};
     }
diff --git a/src/meta_schedule/utils.h b/src/meta_schedule/utils.h
index 03b5490d0b..8a5a2420fe 100644
--- a/src/meta_schedule/utils.h
+++ b/src/meta_schedule/utils.h
@@ -42,6 +42,9 @@ using tir::AsArray;
 using tir::AsOptArray;
 using tir::AsVector;
 
+/**************** TIR Nodes ****************/
+using tir::ForNode;
+
 /*!
  * \brief Compute mean of a FloatImm array.
  * Taken from Ansor
@@ -179,7 +182,7 @@ inline Optional<tir::StmtSRef> FindBlockSRef(const tir::ScheduleState& sch, FPre
 /**************** TIR Annotation ****************/
 
 inline bool HasBinding(const tir::StmtSRef& loop_sref, const String& thread_tag) {
-  const auto* loop = TVM_SREF_TO_FOR(loop, loop_sref);
+  const ForNode* loop = TVM_SREF_TO_FOR(loop, loop_sref);
   if (!loop->thread_binding.defined()) {
     return false;
   }
@@ -191,7 +194,7 @@ inline bool HasBinding(const tir::StmtSRef& loop_sref, const String& thread_tag)
 }
 
 inline Optional<String> GetBinding(const tir::StmtSRef& loop_sref) {
-  const auto* loop = TVM_SREF_TO_FOR(loop, loop_sref);
+  const ForNode* loop = TVM_SREF_TO_FOR(loop, loop_sref);
   if (!loop->thread_binding.defined()) {
     return NullOpt;
   }
diff --git a/src/tir/schedule/analysis/analysis.cc b/src/tir/schedule/analysis/analysis.cc
index a70ee0f7e3..4409a4d05c 100644
--- a/src/tir/schedule/analysis/analysis.cc
+++ b/src/tir/schedule/analysis/analysis.cc
@@ -111,7 +111,7 @@ bool IsCompleteBlock(const ScheduleState& self, const StmtSRef& block_sref,
                      const StmtSRef& scope_root) {
   BlockScope scope = self->GetBlockScope(scope_root);
   // Cond 1. All block vars are data parallel
-  const auto* block = TVM_SREF_TO_BLOCK(block, block_sref);
+  const BlockNode* block = TVM_SREF_TO_BLOCK(block, block_sref);
   for (const IterVar& iter_var : block->iter_vars) {
     if (iter_var->iter_type != kDataPar) {
       return false;
@@ -307,7 +307,7 @@ bool RegionCoveredConsumer(const ScheduleState& self, const StmtSRef& consumer_b
   if (consumer_block_sref->parent == nullptr) {
     return true;
   }
-  const auto* consumer_block = TVM_SREF_TO_BLOCK(consumer_block, consumer_block_sref);
+  const BlockNode* consumer_block = TVM_SREF_TO_BLOCK(consumer_block, consumer_block_sref);
   BlockScope scope = self->GetBlockScope(scope_root);
   // Step 1. Gather all the producers
   struct Producer {
@@ -326,7 +326,7 @@ bool RegionCoveredConsumer(const ScheduleState& self, const StmtSRef& consumer_b
     // i.e. the RAW predecessor is producer
     if (edge->kind == DepKind::kRAW) {
       const StmtSRef& producer_block_sref = edge->src;
-      const auto* producer_block = TVM_SREF_TO_BLOCK(producer_block, producer_block_sref);
+      const BlockNode* producer_block = TVM_SREF_TO_BLOCK(producer_block, producer_block_sref);
       for (const BufferRegion& output_region : producer_block->writes) {
         const VarNode* buffer_var = output_region->buffer->data.get();
         buffer_producers[buffer_var].emplace_back(producer_block_sref, output_region);
@@ -600,7 +600,7 @@ bool CompleteBlock(const ScheduleState& self, const StmtSRef& block_sref,
                    const StmtSRef& scope_root) {
   BlockScope scope = self->GetBlockScope(scope_root);
   // Cond 2. Check if all the block vars are data parallel
-  const auto* block = TVM_SREF_TO_BLOCK(block, block_sref);
+  const BlockNode* block = TVM_SREF_TO_BLOCK(block, block_sref);
   for (const IterVar& iter_var : block->iter_vars) {
     if (iter_var->iter_type != kDataPar) {
       return false;
@@ -631,7 +631,7 @@ bool ReductionBlock(const ScheduleState& self, const StmtSRef& block_sref,
   //   return false;
   // }
   // Cond 4. Check whether the block body has the init statement.
-  const auto* block = TVM_SREF_TO_BLOCK(block, block_sref);
+  const BlockNode* block = TVM_SREF_TO_BLOCK(block, block_sref);
   if (!block->init.defined()) {
     return false;
   }
@@ -677,8 +677,8 @@ bool ReductionBlock(const ScheduleState& self, const StmtSRef& block_sref,
 bool CanMergeReduction(const ScheduleState& self, const StmtSRef& init_block_sref,
                        const StmtSRef& update_block_sref, const StmtSRef& scope_root) {
   BlockScope scope = self->GetBlockScope(scope_root);
-  const auto* init = TVM_SREF_TO_BLOCK(init, init_block_sref);
-  const auto* update = TVM_SREF_TO_BLOCK(update, update_block_sref);
+  const BlockNode* init = TVM_SREF_TO_BLOCK(init, init_block_sref);
+  const BlockNode* update = TVM_SREF_TO_BLOCK(update, update_block_sref);
   // Cond 1. Check the binding of update block is valid
   if (!self->IsAffineBlockBinding(update_block_sref)) {
     return false;
@@ -731,7 +731,7 @@ IterVarType GetLoopIterType(const ScheduleState& self, const StmtSRef& loop_sref
   int n_spatial = 0;
   int n_reduce = 0;
   int n_other = 0;
-  const auto* loop = TVM_SREF_TO_FOR(loop, loop_sref);
+  const ForNode* loop = TVM_SREF_TO_FOR(loop, loop_sref);
   const Var& loop_var = loop->loop_var;
   auto f_visit = [&loop_var, &n_spatial, &n_reduce, &n_other](const ObjectRef& obj) -> bool {
     if (const auto* realize = obj.as<BlockRealizeNode>()) {
@@ -785,7 +785,7 @@ Array<StmtSRef> CollectComputeLocation(const ScheduleState& self, const StmtSRef
   result.reserve(loop_srefs.size());
   bool visited_reduce = false;
   for (const StmtSRef& loop_sref : loop_srefs) {
-    const auto* loop = TVM_SREF_TO_FOR(loop, loop_sref);
+    const ForNode* loop = TVM_SREF_TO_FOR(loop, loop_sref);
     IterVarType iter_type = GetLoopIterType(self, loop_sref);
     if (iter_type == IterVarType::kDataPar) {
       if (visited_reduce) {
diff --git a/src/tir/schedule/concrete_schedule.cc b/src/tir/schedule/concrete_schedule.cc
index 59067986ed..2b536832dc 100644
--- a/src/tir/schedule/concrete_schedule.cc
+++ b/src/tir/schedule/concrete_schedule.cc
@@ -339,7 +339,7 @@ Array<LoopRV> ConcreteScheduleNode::Split(const LoopRV& loop_rv,
   TVM_TIR_SCHEDULE_BEGIN();
   // Prepare for the splitting
   StmtSRef loop_sref = this->GetSRef(loop_rv);
-  const auto* loop = TVM_SREF_TO_FOR(loop, loop_sref);
+  const ForNode* loop = TVM_SREF_TO_FOR(loop, loop_sref);
   PrimExpr len = loop->extent;
   // Find out the None
   int n = factor_rvs.size();
diff --git a/src/tir/schedule/concrete_schedule.h b/src/tir/schedule/concrete_schedule.h
index 2db0273dd4..3384d6394e 100644
--- a/src/tir/schedule/concrete_schedule.h
+++ b/src/tir/schedule/concrete_schedule.h
@@ -214,13 +214,13 @@ class ConcreteScheduleNode : public ScheduleNode {
 
 inline Block ConcreteScheduleNode::Get(const BlockRV& block_rv) const {
   StmtSRef sref = this->GetSRef(block_rv);
-  const auto* block = TVM_SREF_TO_BLOCK(block, sref);
+  const BlockNode* block = TVM_SREF_TO_BLOCK(block, sref);
   return GetRef<Block>(block);
 }
 
 inline For ConcreteScheduleNode::Get(const LoopRV& loop_rv) const {
   StmtSRef sref = this->GetSRef(loop_rv);
-  const auto* loop = TVM_SREF_TO_FOR(loop, sref);
+  const ForNode* loop = TVM_SREF_TO_FOR(loop, sref);
   return GetRef<For>(loop);
 }
 
diff --git a/src/tir/schedule/primitive/reduction.cc b/src/tir/schedule/primitive/reduction.cc
index 369e723963..f02e2876f7 100644
--- a/src/tir/schedule/primitive/reduction.cc
+++ b/src/tir/schedule/primitive/reduction.cc
@@ -390,7 +390,7 @@ StmtSRef RFactor(ScheduleState self, const StmtSRef& loop_sref, int factor_axis)
   std::unordered_map<const VarNode*, For> loop_vars;
   Array<StmtSRef> loops = GetLoops(block_sref);
   for (const StmtSRef& l_sref : loops) {
-    const auto* l = TVM_SREF_TO_FOR(l, l_sref);
+    const ForNode* l = TVM_SREF_TO_FOR(l, l_sref);
     if (l == loop) {
       CHECK(!data_par_iters.count(l->loop_var.get()))
           << "ValueError: The rfactor loop cannot be touched by data parallel block vars";
@@ -598,7 +598,7 @@ StmtSRef RFactor(ScheduleState self, const StmtSRef& loop_sref, int factor_axis)
   // IR replacement later.
   Optional<StmtSRef> replace_top = NullOpt;
   for (int i = static_cast<int>(loops.size()) - 1; i >= 0; --i) {
-    const auto* l = TVM_SREF_TO_FOR(l, loops[i]);
+    const ForNode* l = TVM_SREF_TO_FOR(l, loops[i]);
     if (l->body->IsInstance<SeqStmtNode>()) {
       ICHECK_NE(i, static_cast<int>(loops.size()) - 1)
           << "ValueError: The body of the innermost loop must not be a SeqStmt";
diff --git a/src/tir/schedule/primitive/sampling.cc b/src/tir/schedule/primitive/sampling.cc
index c024c6626c..abebc69469 100644
--- a/src/tir/schedule/primitive/sampling.cc
+++ b/src/tir/schedule/primitive/sampling.cc
@@ -26,7 +26,7 @@ std::vector<int64_t> SamplePerfectTile(tir::ScheduleState self, Sampler* sampler
                                        const tir::StmtSRef& loop_sref, int n,
                                        int max_innermost_factor,
                                        Optional<Array<Integer>>* decision) {
-  const auto* loop = TVM_SREF_TO_FOR(loop, loop_sref);
+  const ForNode* loop = TVM_SREF_TO_FOR(loop, loop_sref);
   int64_t extent = GetLoopIntExtent(loop);
   std::vector<int64_t> result;
   if (extent == -1) {
diff --git a/src/tir/schedule/state.cc b/src/tir/schedule/state.cc
index fa2fe4404e..6116eb2294 100644
--- a/src/tir/schedule/state.cc
+++ b/src/tir/schedule/state.cc
@@ -1046,7 +1046,7 @@ void ScheduleStateNode::DebugVerify() const {
 /**************** BlockInfo-related ****************/
 
 BlockInfo ScheduleStateNode::GetBlockInfo(const StmtSRef& block_sref) const {
-  const auto* block = TVM_SREF_TO_BLOCK(block, block_sref);
+  const BlockNode* block = TVM_SREF_TO_BLOCK(block, block_sref);
   auto it = this->block_info.find(block_sref);
   CHECK(it != this->block_info.end())
       << "IndexError: Cannot find the corresponding BlockScope to the block sref:\n"
diff --git a/src/tir/schedule/utils.cc b/src/tir/schedule/utils.cc
index 726ac65d34..357a363bdf 100644
--- a/src/tir/schedule/utils.cc
+++ b/src/tir/schedule/utils.cc
@@ -173,7 +173,7 @@ BufferRegion SubstituteBufferRegion(const BufferRegion& buffer_region,
 }
 
 BlockRealize GetBlockRealize(const StmtSRef& block_sref) {
-  const auto* block = TVM_SREF_TO_BLOCK(block, block_sref);
+  const BlockNode* block = TVM_SREF_TO_BLOCK(block, block_sref);
   // We cannot support getting the BlockRealize of the root block, since the parent sref of the root
   // block sref is `nullptr`.
   CHECK(block_sref->parent != nullptr)
@@ -443,7 +443,7 @@ void UpdateAffineFlag(ScheduleState self, const StmtSRef& block_sref) {
     return;
   }
   BlockRealize realize = GetBlockRealize(block_sref);
-  const auto* block = TVM_SREF_TO_BLOCK(block, block_sref);
+  const BlockNode* block = TVM_SREF_TO_BLOCK(block, block_sref);
   Map<Var, Range> loop_var_ranges;
   for (StmtSRefNode* loop_sref = block_sref->parent; loop_sref != nullptr;
        loop_sref = loop_sref->parent) {
diff --git a/src/tir/schedule/utils.h b/src/tir/schedule/utils.h
index 4eeb19ca04..c6e0806a94 100644
--- a/src/tir/schedule/utils.h
+++ b/src/tir/schedule/utils.h
@@ -610,7 +610,7 @@ inline int64_t GetLoopIntExtent(const ForNode* loop) {
 }
 
 inline int64_t GetLoopIntExtent(const StmtSRef& loop_sref) {
-  const auto* loop = TVM_SREF_TO_FOR(loop, loop_sref);
+  const ForNode* loop = TVM_SREF_TO_FOR(loop, loop_sref);
   return GetLoopIntExtent(loop);
 }