shreyasravi320 opened a new pull request, #18720:
URL: https://github.com/apache/tvm/pull/18720
# [Relax] Add Dead Parameter Elimination
This PR adds dead parameter elimination to
`src/relax/transform/dead_code_elimination.cc` to remove unused parameters from
Relax functions.
## Motivation
Functions often accumulate unused parameters due to:
- Deprecated model architectures (e.g., unused weight tensors)
- API evolution and backwards compatibility
- Refactoring artifacts
Eliminating these parameters reduces memory usage, speeds up compilation,
and simplifies the IR.
## Changes
- Algorithm:
1. Collect unused parameters across all functions in the module
2. Update signatures and call sites in topological order
3. Repeat while changes persist
- Tests in `tests/python/relax/test_transform_dead_param_elimination.py`
## Example Usage
Before:
```python
@R.function
def forward(x: R.Tensor, unused_weights: R.Tensor):
return x + 1
```
After:
```python
@R.function
def forward(x: R.Tensor):
return x + 1
```
## TODOs
- [ ] CI/CD checks
- [ ] Handle mutual recursion
- [ ] Fully benchmark compilation time and instruction count
- [ ] Documentation
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