1. [DSE] Add test for potential caching bug (NFC) (details)
  2. [mlir] Add canonicalization from `tensor_cast` to `dim` op. (details)
  3. [mlir][Linalg] Define a linalg.init_tensor operation. (details)
Commit 3d56644f18eefe30e353e7fae3cb5e5daf0a0ffb by nikita.ppv
[DSE] Add test for potential caching bug (NFC)

This one would miscompile if read-clobber checks switched to using
the EarlierAccess location, but the read cache was retained.
The file was modifiedllvm/test/Transforms/DeadStoreElimination/MSSA/overlap.ll
Commit de031216bf1755e61418a1515f2b0db0a9cfeddc by ravishankarm
[mlir] Add canonicalization from `tensor_cast` to `dim` op.

Fold a `tensor_cast` -> `dim` to take the `dim` of the original tensor.

Differential Revision:
The file was modifiedmlir/test/Dialect/Standard/canonicalize.mlir
The file was modifiedmlir/lib/Dialect/StandardOps/IR/Ops.cpp
Commit 118a71565462db41cab1dbb0349200627d6e8524 by ravishankarm
[mlir][Linalg] Define a linalg.init_tensor operation.

This operation is used to materialize a tensor of a particular
shape. The shape could be specified as a mix of static and dynamic

The use of this operation is to be an `init` tensor for Linalg
structured operation on tensors where the bounds of the computation
depends on the shape of the output of the linalg operation. The result
of this operation will be used as the `init` tensor of such Linalg
operations. To note,

1) The values in the tensor materialized is not used. Any operation to
   which this is an init tensor is expected to overwrite the entire
2) The tensor is materialized only for the shape of the output and to
   make the loop bounds depend only on operands of the structured

Based on (1) and (2) it is assumed that these operations eventually go
away since they are only used in `dim` operations that can be
canonicalized to make this operation dead. Such canonicalization are
added here too.

Differential Revision:
The file was modifiedmlir/lib/Interfaces/ViewLikeInterface.cpp
The file was modifiedmlir/include/mlir/Interfaces/ViewLikeInterface.h
The file was modifiedmlir/test/Dialect/Linalg/canonicalize.mlir
The file was modifiedmlir/lib/Dialect/Linalg/IR/LinalgOps.cpp
The file was modifiedmlir/test/Dialect/Linalg/roundtrip.mlir
The file was modifiedmlir/include/mlir/Dialect/Linalg/IR/