[all-commits] [llvm/llvm-project] 464dfe: [mlir][tensor][bufferize] `tensor.empty` bufferize...

[Matthias Springer via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 464dfeba440bc1199e1a91e0c04b2dcfa8362f86
      https://github.com/llvm/llvm-project/commit/464dfeba440bc1199e1a91e0c04b2dcfa8362f86
  Author: Matthias Springer <me at m-sp.org>
  Date:   2023-10-03 (Tue, 03 Oct 2023)

  Changed paths:
    M mlir/lib/Dialect/Tensor/Transforms/BufferizableOpInterfaceImpl.cpp
    M mlir/test/Dialect/Tensor/bufferize.mlir

  Log Message:
  -----------
  [mlir][tensor][bufferize] `tensor.empty` bufferizes to an allocation (#68080)

Make `tensor.empty` bufferizable, so that the
`-empty-tensor-to-alloc-tensor` pass becomes optional. This makes the
bufferization easier to use. `tensor.empty` used to be non-bufferizable,
so that there two separate ops, one that can be optimized away
(`tensor.empty`) and one that is guaranteed to bufferize to an
allocation (`bufferization.alloc_tensor`). With the recent improvements
of "empty tensor elimination" this is no longer needed and
`bufferization.alloc_tensor` can be phased out.