[all-commits] [llvm/llvm-project] 5a0075: [mlir][Vector] Generate poison vectors in vector.s...

[Diego Caballero via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 5a0075adbb623c8661862b9af1272b8f430d9e5c
      https://github.com/llvm/llvm-project/commit/5a0075adbb623c8661862b9af1272b8f430d9e5c
  Author: Diego Caballero <dieg0ca6aller0 at gmail.com>
  Date:   2025-02-07 (Fri, 07 Feb 2025)

  Changed paths:
    M mlir/lib/Dialect/Vector/Transforms/LowerVectorShapeCast.cpp
    M mlir/test/Conversion/ConvertToSPIRV/vector-unroll.mlir
    M mlir/test/Dialect/Vector/vector-contract-to-matrix-intrinsics-transforms.mlir
    M mlir/test/Dialect/Vector/vector-shape-cast-lowering-scalable-vectors.mlir
    M mlir/test/Dialect/Vector/vector-shape-cast-lowering-transforms.mlir

  Log Message:
  -----------
  [mlir][Vector] Generate poison vectors in vector.shape_cast lowering (#125613)

This is the first PR that introduces `ub.poison` vectors as part of a
rewrite/conversion pattern in the Vector dialect. It replaces the
`arith.constant dense<0>` vector initialization for
`vector.insert_slice` ops with a poison vector.

This PR depends on all the previous PRs that introduced support for
poison in Vector operations such as `vector.shuffle`, `vector.extract`,
`vector.insert`, including ODS, canonicalization and lowering support.

This PR may improve end-to-end compilation time through LLVM, depending
on the workloads.



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