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Posted to discuss-archive@tvm.apache.org by jinkun via Apache TVM Discuss <no...@discuss.tvm.ai> on 2021/11/26 06:58:48 UTC

[Apache TVM Discuss] [Questions] Why do reduction's init predicate and its main body have different boundary checking behavior


When doing reduction the predicate guarding the [initialization](https://github.com/apache/tvm/blob/adf560ebed8465c22bf58f406d0a8d20663cdd1d/src/te/operation/compute_op.cc#L488) skips the boundary checking of the original itervars, by setting `skip_ivar_domain` argument in [MakeBoundCheck](https://github.com/apache/tvm/blob/adf560ebed8465c22bf58f406d0a8d20663cdd1d/src/te/schedule/message_passing.cc#L526-L580) to true (assuming `stage->rolling_buffer==false`), but [main body](https://github.com/apache/tvm/blob/adf560ebed8465c22bf58f406d0a8d20663cdd1d/src/te/operation/compute_op.cc#L447) checks it. I wonder why they are different?





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