[all-commits] [llvm/llvm-project] 204eb7: [mlir][Vector] Canonicalize empty `vector.mask` in...

[Diego Caballero via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 204eb70af894770fb4b9107fbcf3003cb3f9cb72
      https://github.com/llvm/llvm-project/commit/204eb70af894770fb4b9107fbcf3003cb3f9cb72
  Author: Diego Caballero <dieg0ca6aller0 at gmail.com>
  Date:   2025-05-23 (Fri, 23 May 2025)

  Changed paths:
    M mlir/include/mlir/Dialect/Vector/IR/VectorOps.td
    M mlir/lib/Dialect/Vector/IR/VectorOps.cpp
    M mlir/test/Dialect/Vector/canonicalize.mlir

  Log Message:
  -----------
  [mlir][Vector] Canonicalize empty `vector.mask` into `arith.select` (#140976)

This PR adds a missing canonicalization for empty `vector.mask` ops with
a passthru value.

```
   %0 = vector.mask %mask, %passthru { vector.yield %a : vector<8xf32> } :
     vector<8xi1> -> vector<8xf32>

 becomes:

   %0 = arith.select %mask, %a, %passthru : vector<8xf32>
```



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