[TIRx][CUDA] Allow launch bounds with required block size - #20226
Merged
spectrometerHBH merged 1 commit intoAug 29, 2026
Merged
Conversation
tqchen
approved these changes
Aug 29, 2026
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
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Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be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 change allows
tirx.required_block_sizeto be combined with CUDA launch-bounds attributes while preserving the existing incompatibility withtirx.max_registers.The combination is needed for kernels that require exact block/cluster dimensions and also need a minimum blocks-per-SM launch bound. The CUDA code generator now emits both attributes, and SplitHostDevice retains the supported combination.
Tests:
python -m pytest -q tests/python/tirx-transform/test_tir_transform_split_host_device.py tests/python/tirx/codegen/test_codegen_cuda.py(225 passed)pre-commit run --files src/backend/cuda/codegen/codegen_cuda.cc src/tirx/transform/split_host_device.cc tests/python/tirx-transform/test_tir_transform_split_host_device.py tests/python/tirx/codegen/test_codegen_cuda.py