[Unity][Transform] Extract partial-tuple-usage from FuseTIR - #16120
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Lunderberg
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All pre-requisite PRs have landed, and this is now ready for review. |
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Prior to this commit, the `FuseTIR` pass explicitly tracked usage of tuple arguments, to minimize the set of arguments provided to each kernel. The additional tgracking and handling of partially-used tuples makes it difficult to follow the primary changes being made by `FuseTIR`. This commit implements the same functionality in terms of the `ExpandTupleArguments` and `RemoveUnusedParameters` transforms, introduced in apache#16115 and apache#16116 respectively. By using these passes before the main `FuseOps` changes, partial tuple usage is already handled at that point. This commit is intended to minimize any changes to user-facing behavior, and so these pre-process passes are currently used internally by `FuseOps`. This may be avoided in the future by pulling this internal delegation out into a lowering pipeline.
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Rebased onto unity to avoid stale CI results. |
| out->push_back(Downcast<tir::Var>(var)); | ||
| } | ||
| } else { | ||
| ICHECK(false) << "TypeError: The param type of PrimFunc is expected to be Tensor, Tuple or " |
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Nitpick: tuples are no longer accepted, so the message is inaccurate (though a tuple would have been caught above).
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Good catch, and updated to remove Tuple from the list, and add PrimValue as it is now handled.
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| // Move all scalar params after buffer params. | ||
| std::stable_sort(prim_func_params.begin(), prim_func_params.end(), |
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I assume it's important for the relative ordering to be preserved (hence the stable sort), might be good to call that out.
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Good call, and updated the comment. It's mainly to make sure that the order is consistent and predictable for unit tests, not for any correctness of the output.
slyubomirsky
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slyubomirsky
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The changes seem to make sense. I'm not fully versed on FuseTIR so I'm not aware of all of the broader context, but the expansion of tuples makes this code a lot a simpler and the tests all pass. I had a couple of commenting nitpicks to make, but they shouldn't be blockers. Great work.
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Prior to this commit, the
FuseTIRpass explicitly tracked usage oftuple arguments, to minimize the set of arguments provided to each
kernel. The additional tgracking and handling of partially-used
tuples makes it difficult to follow the primary changes being made by
FuseTIR.This commit implements the same functionality in terms of the
ExpandTupleArgumentsandRemoveUnusedParameterstransforms,introduced in #16115 and
#16116 respectively. By using these
passes before the main
FuseOpschanges, partial tuple usage isalready handled at that point.
This commit is intended to minimize any changes to user-facing
behavior, and so these pre-process passes are currently used
internally by
FuseTIR. This may be avoided in the future by pullingthis internal delegation out into a lowering pipeline.