[TIR] Fix PlanAndUpdateBufferAllocationLocation not visiting constant…

… buffer (#13605)

* Fix PlanAndUpdateBufferAllocationLocation not visiting constant buffer

* add comment

src/tir/transforms/plan_update_buffer_allocation_location.cc

@@ -61,24 +61,35 @@ class BufferAllocateOrderCollector : public StmtExprVisitor {
   }
 
  private:
+  bool find(const Buffer& buf) {
+    return std::find(buffer_alloc_recorder_.begin(), buffer_alloc_recorder_.end(), buf) !=
+           buffer_alloc_recorder_.end();
+  }
+
   void VisitStmt_(const BlockNode* op) final {
     for (const Buffer& buffer : op->alloc_buffers) {
       buffer_alloc_recorder_.push_back(buffer);
     }
+    // Also visit match_buffers to collect constant buffers associated with AllocateConst nodes.
+    // These buffers only appear in read and match_buffer regions.
+    for (const auto& region : op->match_buffers) {
+      if (!find(region->source->buffer)) {
+        buffer_alloc_recorder_.push_back(region->source->buffer);
+      }
+    }
+
     StmtExprVisitor::VisitStmt_(op);
   }
 
   void VisitExpr_(const BufferLoadNode* op) final {
-    if (std::find(buffer_alloc_recorder_.begin(), buffer_alloc_recorder_.end(), op->buffer) ==
-        buffer_alloc_recorder_.end()) {
+    if (!find(op->buffer)) {
       buffer_alloc_recorder_.push_back(op->buffer);
     }
     StmtExprVisitor::VisitExpr_(op);
   }
 
   void VisitStmt_(const BufferStoreNode* op) final {
-    if (std::find(buffer_alloc_recorder_.begin(), buffer_alloc_recorder_.end(), op->buffer) ==
-        buffer_alloc_recorder_.end()) {
+    if (!find(op->buffer)) {
       buffer_alloc_recorder_.push_back(op->buffer);
     }
     StmtExprVisitor::VisitStmt_(op);