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llvm / llvm-project / c6ff2446a4650f23afc9faffb55020aa68cf678c
commitc6ff2446a4650f23afc9faffb55020aa68cf678c[log] [tgz]
authorMatthias Springer <me@m-sp.org>Wed Jun 19 09:58:37 2024 +0200
committerGitHub <noreply@github.com>Wed Jun 19 09:58:37 2024 +0200
tree25e4e12975f4805b0946bcff7f48a2bb91fc5db5
parentbacbf26b4cb64dbf77819ff5a2b0f4c26d111c66 [diff]
[mlir][vector] Add `vector.from_elements` op (#95938)

This commit adds a new operation to the vector dialect:
`vector.from_elements`

The op constructs a new vector from a given list of scalar values. It is
similar to `tensor.from_elements`.
```mlir
%0 = vector.from_elements %a, %b, %c, %a, %a, %a : vector<2x3xf32>
```

Constructing a new vector from elements was tedious before this op
existed: a typical way was to define an `arith.constant ... :
vector<...>`, followed by a chain of `vector.insert`.

Folders/canonicalizations are added that can fold `vector.extract` ops
and convert the `vector.from_elements` op into a `vector.splat` op.

The LLVM lowering generates an `llvm.mlir.undef`, followed by a sequence
of scalar insertions in the form of `llvm.insertelement`. Only 0-D and
1-D vectors are currently supported in the LLVM lowering.
7 files changed
tree: 25e4e12975f4805b0946bcff7f48a2bb91fc5db5
  1. .ci/
  2. .github/
  3. bolt/
  4. clang/
  5. clang-tools-extra/
  6. cmake/
  7. compiler-rt/
  8. cross-project-tests/
  9. flang/
  10. libc/
  11. libclc/
  12. libcxx/
  13. libcxxabi/
  14. libunwind/
  15. lld/
  16. lldb/
  17. llvm/
  18. llvm-libgcc/
  19. mlir/
  20. offload/
  21. openmp/
  22. polly/
  23. pstl/
  24. runtimes/
  25. third-party/
  26. utils/
  27. .clang-format
  28. .clang-tidy
  29. .git-blame-ignore-revs
  30. .gitattributes
  31. .gitignore
  32. .mailmap
  33. CODE_OF_CONDUCT.md
  34. CONTRIBUTING.md
  35. LICENSE.TXT
  36. pyproject.toml
  37. README.md
  38. SECURITY.md
README.md

The LLVM Compiler Infrastructure

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