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llvm / llvm-project / a356e6ccada87d6bfc4513fba4b1a682305e094a
commita356e6ccada87d6bfc4513fba4b1a682305e094a[log] [tgz]
authorPiJoules <6019989+PiJoules@users.noreply.github.com>Tue Jan 30 13:58:55 2024 -0800
committerGitHub <noreply@github.com>Tue Jan 30 13:58:55 2024 -0800
tree17a8ea238f7aeb9c5e160e446d6e40f886f95fa4
parent648560062af8deb4e6478130deb1dd8fa62929a8 [diff]
[SelectionDAG] Expand fixed point multiplication into libcall (#79352)

32-bit ARMv6 with thumb doesn't support MULHS/MUL_LOHI as legal/custom
nodes during expansion which will cause fixed point multiplication of
_Accum types to fail with fixed point arithmetic. Prior to this, we just
happen to use fixed point multiplication on platforms that happen to
support these MULHS/MUL_LOHI.

This patch attempts to check if the multiplication can be done via
libcalls, which are provided by the arm runtime. These libcall attempts
are made elsewhere, so this patch refactors that libcall logic into its
own functions and the fixed point expansion calls and reuses that logic.
7 files changed
tree: 17a8ea238f7aeb9c5e160e446d6e40f886f95fa4
  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. openmp/
  21. polly/
  22. pstl/
  23. runtimes/
  24. third-party/
  25. utils/
  26. .arcconfig
  27. .arclint
  28. .clang-format
  29. .clang-tidy
  30. .git-blame-ignore-revs
  31. .gitattributes
  32. .gitignore
  33. .mailmap
  34. CODE_OF_CONDUCT.md
  35. CONTRIBUTING.md
  36. LICENSE.TXT
  37. README.md
  38. SECURITY.md
README.md

The LLVM Compiler Infrastructure

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Welcome to the LLVM project!

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