[all-commits] [llvm/llvm-project] 7aecd7: [mlir][Vector] Add `vector.to_elements` op (#141457)

[Diego Caballero via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 7aecd7ecacb4b305b94149f3cfcef306a9da6beb
      https://github.com/llvm/llvm-project/commit/7aecd7ecacb4b305b94149f3cfcef306a9da6beb
  Author: Diego Caballero <dieg0ca6aller0 at gmail.com>
  Date:   2025-06-18 (Wed, 18 Jun 2025)

  Changed paths:
    M mlir/include/mlir/Dialect/Vector/IR/VectorOps.td
    M mlir/include/mlir/IR/OpBase.td
    M mlir/lib/TableGen/Operator.cpp
    M mlir/test/Dialect/Vector/invalid.mlir
    M mlir/test/Dialect/Vector/ops.mlir
    M mlir/tools/mlir-tblgen/OpFormatGen.cpp

  Log Message:
  -----------
  [mlir][Vector] Add `vector.to_elements` op (#141457)

This PR introduces the `vector.to_elements` op, which decomposes a
vector into its scalar elements. This operation is symmetrical to the
existing `vector.from_elements`.

Examples:

```
    // Decompose a 0-D vector.
    %0 = vector.to_elements %v0 : vector<f32>
    // %0 = %v0[0]

    // Decompose a 1-D vector.
    %0:2 = vector.to_elements %v1 : vector<2xf32>
    // %0#0 = %v1[0]
    // %0#1 = %v1[1]

    // Decompose a 2-D.
    %0:6 = vector.to_elements %v2 : vector<2x3xf32>
    // %0#0 = %v2[0, 0]
    // %0#1 = %v2[0, 1]
    // %0#2 = %v2[0, 2]
    // %0#3 = %v2[1, 0]
    // %0#4 = %v2[1, 1]
    // %0#5 = %v2[1, 2]
```

This op is aimed at reducing code size when modeling "structured" vector
extractions and simplifying canonicalizations of large sequences of
`vector.extract` and `vector.insert` ops into `vector.shuffle` and other
sophisticated ops that can re-arrange vector elements.



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