[Mlir-commits] [mlir] [mlir][mem2reg] Promote buffers accessed via dynamic subviews and memref.copy (PR #217793)

[Jianhui Li]

Jianhui-Li wrote:

@rengolin  @banach-space  I reduce the scope of this PR to ease the review process. 
The support for expand_shape and collapse_shape was taken out by the latest commit [[mlir][mem2reg] Defer expand_shape/collapse_shape support to a follow-up](https://github.com/llvm/llvm-project/pull/217793/changes/ccaf73d3df8798d22ef28191b15b2463a3981ecd)

https://github.com/llvm/llvm-project/pull/217793