GitLab

* [Refactor] Clean up whitespace in CUDA-related files

- Removed unnecessary blank lines in `cuda.py`, `__init__.py`, and `cuda_driver.py` to improve code readability and maintainability.
- This change enhances the overall organization of the codebase without altering functionality.

* [Benchmark] Add FP8 Matrix Multiplication Benchmark Script

- Introduced a new benchmark script for FP8 matrix multiplication in `benchmark/matmul_fp8/benchmark_matmul.py`.
- The script includes functions for reference matrix multiplication, configuration generation for autotuning, and an autotuned kernel for performance measurement.
- Added command-line argument parsing for matrix dimensions and the option to enable BitBLAS roller for search space exploration.
- The benchmark computes and prints the best latency and performance metrics, enhancing the benchmarking capabilities for FP8 operations.

* lint fix

* Enhance variable creation by associating data types in IR and layout files, and introduce ExpandIndexDataType transformation

- Updated variable creation in `ir.cc`, `gemm_layouts.cc`, and `elem.cc` to include data types for better type safety.
- Added a new transformation `ExpandIndexDataType` to promote integer types to int64 where necessary, improving compatibility and performance.
- Integrated the new transformation into the optimization pipeline in `phase.py`.
- Documented the new transformation in `__init__.py` for clarity.

* lint fix

* Add configuration option for index bitwidth and remove ExpandIndexDataType transformation

- Introduced a new pass configuration option `kConfigIndexBitwidth` to allow customization of index bitwidth.
- Updated the optimization pipeline in `phase.py` to utilize the new configuration option instead of the removed `ExpandIndexDataType` transformation.
- Documented the new configuration option in the JIT compilation function's parameters for clarity.
- Removed the `ExpandIndexDataType` transformation implementation from the codebase to streamline the transformation process.

* lint fix

* Refactor index bitwidth configuration handling

- Updated the `ConfigIndexBitwidth` pass to only apply the bitwidth transformation if the configuration option is defined, preventing potential errors with undefined values.
- Changed the default value of `tl.config_index_bitwidth` in the JIT compilation function's parameters from 32 to None for better clarity and flexibility.

* lint fix

* lint fix

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Co-authored-by: LeiWang1999 <wyatuestc@gmail.com>