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llvm / llvm-project / d28ed29d6bd9f0389092775406fff7e6205d4d5f
commitd28ed29d6bd9f0389092775406fff7e6205d4d5f[log] [tgz]
authorSam Parker <sam.parker@arm.com>Wed Jul 17 09:21:52 2024 +0100
committerGitHub <noreply@github.com>Wed Jul 17 09:21:52 2024 +0100
treebe650c3abc641b4da02f1fcdb94c4a125881a691
parentcaaf8099efa87a7ebca8920971b7d7f719808591 [diff]
[TTI][WebAssembly] Pairwise reduction expansion (#93948)

WebAssembly doesn't support horizontal operations nor does it have a way
of expressing fast-math or reassoc flags, so runtimes are currently
unable to use pairwise operations when generating code from the existing
shuffle patterns.

This patch allows the backend to select which, arbitary, shuffle pattern
to be used per reduction intrinsic. The default behaviour is the same as
the existing, which is by splitting the vector into a top and bottom
half. The other pattern introduced is for a pairwise shuffle.

WebAssembly enables pairwise reductions for int/fp add/sub.
9 files changed
tree: be650c3abc641b4da02f1fcdb94c4a125881a691
  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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