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