chore: import upstream snapshot with attribution

2026-07-13 13:36:25 +08:00
commit 26446540fa
3151 changed files with 974126 additions and 0 deletions
@@ -0,0 +1,88 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+"""Define SBlockDependenceInfoNode that uses the SBlockScope and StmtSRef objects
+to store the block level dependences"""
+
+from tvm_ffi import register_object
+
+from tvm.ir.module import IRModule
+from tvm.runtime import Object
+from tvm.tirx import PrimFunc, SBlock
+
+from . import _ffi_api
+from .sblock_scope import SBlockScope, StmtSRef
+
+
+@register_object("s_tir.SBlockDependenceInfo")
+class SBlockDependenceInfo(Object):
+    """
+    SBlockDependenceInfo
+    An object that helps build and query block level dependences using the 2 core objects
+    SBlockScope and StmtSRef
+
+    The data structures exposed are:
+    1) sref2scope: Mapping from the srefs to its corresponding SBlockScope
+    2) stmt2ref: Mapping from blocks to corresponding StmtSRefs
+
+    Note that this object does not store SRefs to loops as the purpose is only to expose block level
+    dependences. This provides the advantage that the scope block (parent block) for a given block
+    sref can be directly accessed as sref->parent
+    """
+
+    mod: IRModule
+
+    def __init__(self, mod: IRModule | PrimFunc):
+        if isinstance(mod, PrimFunc):
+            mod = IRModule({"main": mod})
+        if not isinstance(mod, IRModule):
+            raise TypeError(f"Expected `mod` to be PrimFunc or IRModule, but gets: {mod}")
+        self.__init_handle_by_constructor__(
+            _ffi_api.SBlockDependenceInfo,  # type: ignore # pylint: disable=no-member
+            mod,
+        )
+
+    def get_sref(self, block: SBlock) -> StmtSRef | None:
+        """Return the corresponding sref that points to the block
+
+        Parameters
+        ----------
+        block : SBlock
+            The block for which the sref is to be retrieved
+
+        Returns
+        -------
+        sref : StmtSRef
+            The corresponding sref
+        """
+        return _ffi_api.SBlockDependenceInfoGetSRef(self, block)  # type: ignore # pylint: disable=no-member
+
+    def get_sblock_scope(self, block_sref: StmtSRef) -> SBlockScope:
+        """Get the SBlockScope correpsonding to the block sref
+
+        Parameters
+        ----------
+        block_sref : StmtSRef
+            The block sref to be retrieved
+
+        Returns
+        -------
+        scope : SBlockScope
+            The corresponding SBlockScope
+        """
+        return _ffi_api.SBlockDependenceInfoGetSBlockScope(  # type: ignore # pylint: disable=no-member
+            self, block_sref
+        )