## Summary
Fixes crash when running `--eliminate-empty-tensors` on MLIR modules
containing `sparse_tensor.new` with a tensor input.
## Problem
The `sparse_tensor.new` operation was missing the
`bufferizesToMemoryRead`, `bufferizesToMemoryWrite`, and
`getAliasingValues` methods in its `BufferizableOpInterface`
implementation. This caused an `UNREACHABLE` crash with message
"bufferizesToMemoryRead not implemented".
## Solution
Implemented the missing methods in `NewOpInterface`:
- `bufferizesToMemoryRead`: returns `true` (reads from source tensor)
- `bufferizesToMemoryWrite`: returns `false` (doesn't write to source)
- `getAliasingValues`: returns empty (result is new allocation, not an
alias)
Also added a test case for `sparse_tensor.new` with tensor input.
Fixes#178419
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
fe9107fc73