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llvm / llvm-project / 858afe90aad9ca45165d64baec9249dd680c85d5
commit858afe90aad9ca45165d64baec9249dd680c85d5[log] [tgz]
authorHans Wennborg <hans@chromium.org>Fri Aug 23 16:42:04 2024 +0200
committerHans Wennborg <hans@chromium.org>Fri Aug 23 16:42:04 2024 +0200
tree685d9571373f8856ec801943bc61e122d97a1fe0
parentdab19dac94eee19483ba1a7c37bdec4b8501acc3 [diff]
Revert "[RISCV] Add isel optimization for (and (sra y, c2), c1) to recover regression from #101751. (#104114)"

This caused an assert to fire:

  llvm/include/llvm/Support/Casting.h:566:
  decltype(auto) llvm::cast(const From &) [To = llvm::ConstantSDNode, From = llvm::SDValue]:
  Assertion `isa<To>(Val) && "cast<Ty>() argument of incompatible type!"' failed.

see comment on the PR.

> If c1 is a shifted mask with c3 leading zeros and c4 trailing zeros. If
> c2 is greater than c3, we can use (srli (srai y, c2 - c3), c3 + c4)
> followed by a SHXADD with c4 as the X amount.
>
> Without Zba we can use (slli (srli (srai y, c2 - c3), c3 + c4), c4).
> Alive2: https://alive2.llvm.org/ce/z/AwhheR

This reverts commit 514481736cf943464125ef34570a7df0a19290de.
2 files changed
tree: 685d9571373f8856ec801943bc61e122d97a1fe0
  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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Welcome to the LLVM project!

This repository contains the source code for LLVM, a toolkit for the construction of highly optimized compilers, optimizers, and run-time environments.

The LLVM project has multiple components. The core of the project is itself called “LLVM”. This contains all of the tools, libraries, and header files needed to process intermediate representations and convert them into object files. Tools include an assembler, disassembler, bitcode analyzer, and bitcode optimizer.

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Other components include: the libc++ C++ standard library, the LLD linker, and more.

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