[Mlir-commits] [mlir] [mlir][bufferize] Make buffer-results-to-out-params support only functions that are neither public nor extern (PR #162441)

[Matthias Springer]

matthias-springer wrote:

> The reason lies in the fact that during DeadCodeAnalysis, public and extern functions have unknown function calls, so we cannot modify the function signatures.

There are a few other passes that behave similarly: e.g., the ownership-based buffer deallocation pass changes function signatures only if the function os private:
```
    The `private-function-dynamic-ownership` pass option allows the pass to add
    additional arguments to private functions to dynamically give ownership of
    MemRefs to callees. This can enable earlier deallocations and allows the
    pass to by-pass the function boundary ABI and thus potentially leading to
    fewer MemRef clones being inserted.
```



https://github.com/llvm/llvm-project/pull/162441