[CPU][SVE] Enable scalable vectorization and tiling for non-padded matmuls (#15108)

This patch implements a "vertical slice" that allows for the scalable
vectorization of matmuls on AArch64 targets with SVE. This only updates
lowerings along that path, so more is needed to enable scalable
vectorization everywhere.

This required a few changes:

- The default vector sizes of matmuls on AArch64+SVE are now (8, [32],
16)
   * That is a middle scalable dimension (i.e. 32 x vscale)
- `iree-llvmcpu-tile-and-fuse` now generates vscale bounded loops for
scalable tiles
- `TilingConfig` now returns a pair of tile sizes and scalable flags
(`SizesAndScalableFlags`) for vector sizes
* This allows connecting the scalable sizes to the generic vectorizer
(which passes them down to the linalg vectorizer)

A few unit tests have been added for this, but a complete e2e test is
not possible without SVE testing infrastructure.
15 files changed
tree: 892dbed0e383a991a6d4a83b109c96aabb0d48ef
  1. .devcontainer/
  2. .github/
  3. build_tools/
  4. compiler/
  5. docs/
  6. experimental/
  7. integrations/
  8. lib/
  9. llvm-external-projects/
  10. runtime/
  11. samples/
  12. tests/
  13. third_party/
  14. tools/
  15. .bazel_to_cmake.cfg.py
  16. .bazelignore
  17. .bazelrc
  18. .bazelversion
  19. .clang-format
  20. .dockerignore
  21. .git-blame-ignore-revs
  22. .gitignore
  23. .gitmodules
  24. .yamllint.yml
  25. AUTHORS
  26. BUILD.bazel
  27. CITATION.cff
  28. CMakeLists.txt
  29. configure_bazel.py
  30. CONTRIBUTING.md
  31. LICENSE
  32. README.md
  33. WORKSPACE
README.md

IREE: Intermediate Representation Execution Environment

IREE (Intermediate Representation Execution Environment, pronounced as “eerie”) is an MLIR-based end-to-end compiler and runtime that lowers Machine Learning (ML) models to a unified IR that scales up to meet the needs of the datacenter and down to satisfy the constraints and special considerations of mobile and edge deployments.

See our website for project details, user guides, and instructions on building from source.

CI Status

Project Status

IREE is still in its early phase. We have settled down on the overarching infrastructure and are actively improving various software components as well as project logistics. It is still quite far from ready for everyday use and is made available without any support at the moment. With that said, we welcome any kind of feedback on any communication channels!

Communication Channels

Related Project Channels

  • MLIR topic within LLVM Discourse: IREE is enabled by and heavily relies on MLIR. IREE sometimes is referred to in certain MLIR discussions. Useful if you are also interested in MLIR evolution.

Architecture Overview

IREE Architecture IREE Architecture

See our website for more information.

Presentations and Talks

License

IREE is licensed under the terms of the Apache 2.0 License with LLVM Exceptions. See LICENSE for more information.