[TIR][Transform] Introduce new InjectPermutedLayout
pass
#16070
Merged
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
This PR introduces the new
InjectPermutedLayout
pass, partially adapted from the old version.This pass will permute the visiting indices of the shared memory with xor operations to avoid bank conflicts. For permutation details see p39 of these slides.
The current interface is:
The load/store operation could be:
And the InjectPermutedLayout pass is injected in the lowering process in
driver_api.cc
. So after this pass in the building stage, the visiting indices will be permuted.Notably this pass works after the
CompactBufferAllocation
pass because it relies on the shape of the shared memory in every threadblock.cc @spectrometerHBH @vinx13 @Hzfengsy