[SparseTIR] SparseBlock on C++/Python side (#11)

* Fix a bug in the last commit

* SparseBlock on C++ & Python side

include/tvm/tir/stmt.h

@@ -327,28 +327,6 @@ class BufferStore : public Stmt {
   TVM_DEFINE_OBJECT_REF_COW_METHOD(BufferStoreNode);
 };
 
-/*!
- * \brief Sparse Block node.
- */
-class SparseBlockNode : public StmtNode {
- public:
-  /*! \brief The sparse iteration variables of the block. */
-  Array<SpIterVar> sp_iter_vars;
-  /*! \brief The sparse buffers defined in the block. */
-  Array<SparseBuffer> sp_buffers;
-  /*! \brief The body of the block */
-  Stmt body;
-
-  static constexpr const char* _type_key = "tir.SparseBlock";
-  TVM_DECLARE_FINAL_OBJECT_INFO(SparseBlockNode, StmtNode);
-};
-
-class SparseBlock : public Stmt {
- public:
-  TVM_DEFINE_OBJECT_REF_METHODS(SparseBlock, Stmt, SparseBlockNode);
-};
-
-
 /*!
  * \brief Store value to the high dimension sparse buffer.
  *
@@ -1300,6 +1278,61 @@ class BlockRealize : public Stmt {
   TVM_DEFINE_OBJECT_REF_COW_METHOD(BlockRealizeNode);
 };
 
+/*!
+ * \brief Sparse Block node.
+ */
+class SparseBlockNode : public StmtNode {
+ public:
+  /*! \brief The sparse iteration variables of the block. */
+  Array<SpIterVar> sp_iter_vars;
+  /*! \brief The sparse buffers defined in the block. */
+  Array<SparseBuffer> sp_buffers;
+  /*! \brief The name of the block */
+  String name;
+  /*! \brief The body of the block */
+  Stmt body;
+  /*! \brief The init statement of the block */
+  Optional<Stmt> init;
+
+  void VisitAttrs(AttrVisitor* v) {
+    v->Visit("sp_iter_vars", &sp_iter_vars);
+    v->Visit("sp_buffers", &sp_buffers);
+    v->Visit("name", &name);
+    v->Visit("body", &body);
+    v->Visit("init", &init);
+  }
+
+  bool SEqualReduce(const SparseBlockNode* other, SEqualReducer equal) const {
+    return equal(sp_iter_vars, other->sp_iter_vars) && equal(sp_buffers, other->sp_buffers) &&
+           equal(name, other->name) && equal(body, other->body) && equal(init, other->init);
+  }
+
+  void SHashReduce(SHashReducer hash_reduce) const {
+    hash_reduce(sp_iter_vars);
+    hash_reduce(sp_buffers);
+    hash_reduce(name);
+    hash_reduce(body);
+    hash_reduce(init);
+  }
+
+  static constexpr const char* _type_key = "tir.SparseBlock";
+  TVM_DECLARE_FINAL_OBJECT_INFO(SparseBlockNode, StmtNode);
+};
+
+/*!
+ * \brief Managed reference to SparseBufferNode
+ * \sa SparseBufferNode
+ */
+class SparseBlock : public Stmt {
+ public:
+  TVM_DLL explicit SparseBlock(Array<SpIterVar> sp_iter_vars, Array<SparseBuffer> sp_buffers,
+                               String name, Stmt body, Optional<Stmt> init = NullOpt,
+                               Span span = Span());
+
+  TVM_DEFINE_OBJECT_REF_METHODS(SparseBlock, Stmt, SparseBlockNode);
+  TVM_DEFINE_OBJECT_REF_COW_METHOD(SparseBlockNode);
+};
+
 /*! \brief namespace of possible attribute sin AttrStmt.attr_key */
 namespace attr {
 // The above attr does not pass to ir stage.

python/tvm/tir/sparse.py

@@ -236,7 +236,7 @@ class SpIterVar(Object):
     SparseFixed = 2
     SparseVariable = 3
 
-    def __init__(self, var, max_extent, kind, axis=None):
+    def __init__(self, var, max_extent, kind, is_reduction, axis=None):
         self.__init_handle_by_constructor__(
             _ffi_api.SpIterVar, var, max_extent, kind, is_reduction, axis  # type: ignore
         )

python/tvm/tir/stmt.py

@@ -36,6 +36,7 @@
 from . import _ffi_api
 from .buffer import Buffer
 from .expr import IterVar
+from .sparse import SpIterVar, SparseBuffer
 
 
 class Stmt(Object):
@@ -614,6 +615,58 @@ def __init__(
         )  # type: ignore
 
 
+@tvm._ffi.register_object("tir.SparseBlock")
+class SparseBlock(Stmt):
+    """SparseBlock node.
+
+    Parameters
+    ----------
+    sp_iter_vars : List[SpIterVar]
+        The sparse iteration variables of the block.
+
+    sp_buffers : List[SparseBuffer]
+        The sparse buffers defined in the block.
+
+    name : str
+        The name of the block.
+
+    body : Stmt
+        The body of the block.
+
+    init : Optional[Stmt]
+        The init statement of the block.
+
+    span : Optional[Span]
+        The location of this block in the source code.
+    """
+
+    sp_iter_vars: List[SpIterVar]
+    sp_buffers: List[SparseBuffer]
+    name: str
+    body: Stmt
+    init: Optional[Stmt]
+    span: Optional[Span]
+
+    def __init__(
+        self,
+        sp_iter_vars: List[SpIterVar],
+        sp_buffers: List[SparseBuffer],
+        name: str,
+        body: Stmt,
+        init: Optional[Stmt] = None,
+        span: Optional[Span] = None,
+    ):
+        self.__init_handle_by_constructor__(
+            _ffi_api.SparseBlock,  # type: ignore
+            sp_iter_vars,
+            sp_buffers,
+            name,
+            body,
+            init,
+            span,
+        )  # type: ignore
+
+
 @tvm._ffi.register_object("tir.BlockRealize")
 class BlockRealize(Stmt):
     """BlockRealize node.

src/tir/ir/stmt.cc

@@ -876,17 +876,21 @@ void PrintBlockSignature(const BlockNode* op, ReprPrinter* p) {
   }
 }
 
-void PrintBlockBody(const BlockNode* op, ReprPrinter* p) {
-  // Print init
-  if (op->init.defined()) {
+void PrintInitStmt(const Optional<Stmt>& init, ReprPrinter* p) {
+  if (init.defined()) {
     p->PrintIndent();
     p->stream << "with init() {\n";
     p->indent += 2;
-    p->Print(op->init.value());
+    p->Print(init.value());
     p->indent -= 2;
     p->PrintIndent();
     p->stream << "}\n";
   }
+}
+
+void PrintBlockBody(const BlockNode* op, ReprPrinter* p) {
+  // Print init
+  PrintInitStmt(op->init, p);
   // Print body
   p->Print(op->body);
 }
@@ -964,6 +968,59 @@ TVM_STATIC_IR_FUNCTOR(ReprPrinter, vtable)
       p->stream << "}\n";
     });
 
+SparseBlock::SparseBlock(Array<SpIterVar> sp_iter_vars, Array<SparseBuffer> sp_buffers, String name,
+                         Stmt body, Optional<Stmt> init, Span span) {
+  ObjectPtr<SparseBlockNode> node = make_object<SparseBlockNode>();
+  node->sp_iter_vars = std::move(sp_iter_vars);
+  node->sp_buffers = std::move(sp_buffers);
+  node->name = std::move(name);
+  node->body = std::move(body);
+  node->init = std::move(init);
+  node->span = std::move(span);
+  data_ = std::move(node);
+}
+
+TVM_REGISTER_GLOBAL("tir.SparseBlock")
+    .set_body_typed([](Array<SpIterVar> sp_iter_vars, Array<SparseBuffer> sp_buffers, String name,
+                       Stmt body, Optional<Stmt> init, Span span) {
+      return SparseBlock(sp_iter_vars, sp_buffers, name, body, init, span);
+    });
+
+TVM_REGISTER_NODE_TYPE(SparseBlockNode);
+
+void PrintSparseBlockTitle(const SparseBlockNode* op, ReprPrinter* p) {
+  p->stream << "sparse_block " << op->name << "(";
+  for (int i = 0; i < static_cast<int>(op->sp_iter_vars.size()); ++i) {
+    p->Print(op->sp_iter_vars[i]);
+    if (i < static_cast<int>(op->sp_iter_vars.size()) - 1) {
+      p->stream << ", ";
+    }
+  }
+  p->stream << ")";
+}
+
+void PrintSparseBlockBody(const SparseBlockNode* op, ReprPrinter* p) {
+  // Print init
+  PrintInitStmt(op->init, p);
+  // Print body
+  p->Print(op->body);
+}
+
+TVM_STATIC_IR_FUNCTOR(ReprPrinter, vtable)
+    .set_dispatch<SparseBlockNode>([](const ObjectRef& node, ReprPrinter* p) {
+      auto* op = static_cast<const SparseBlockNode*>(node.get());
+      p->PrintIndent();
+      PrintSparseBlockTitle(op, p);
+      p->stream << " {\n";
+      p->indent += 2;
+
+      PrintSparseBlockBody(op, p);
+
+      p->indent -= 2;
+      p->PrintIndent();
+      p->stream << "}\n";
+    });
+
 PrimExpr TypeAnnotation(DataType dtype, Span span) {
   static auto op = Op::Get("tir.type_annotation");
   return tir::Call(dtype, op, {}, span);