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llvm / llvm-project / 307713aafc011844acdcb18ca6acbf3f2de29f5f
commit307713aafc011844acdcb18ca6acbf3f2de29f5f[log] [tgz]
authorDavid Green <david.green@arm.com>Sat Sep 07 15:31:26 2024 +0100
committerGitHub <noreply@github.com>Sat Sep 07 15:31:26 2024 +0100
tree01b3e3a4db7ca33dfaf80c19a502c4772ed8d9bc
parent3ba0755d3e50c62d27ac9c37a0250f525dcad28d [diff]
[AArch64] Do not generate uitofp(ld4) where and/shift can be used. (#107538)

After #107201 and #107367 the codegen for zext(ld4) can use and / shift
to extract the lanes out of the original vectors elements. This avoids
the need for the expensive ld4 operations, so can lead to performance
improvements over using the interleaving loads and ushll.

This patch stops the generation of ld4 for uitofp(ld4) that would become
uitofp(zext(ld4)). It doesn't handle zext yet to make sure that widening
instructions like mull and addl are not adversely affected.
2 files changed
tree: 01b3e3a4db7ca33dfaf80c19a502c4772ed8d9bc
  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.

C-like languages use the Clang frontend. This component compiles C, C++, Objective-C, and Objective-C++ code into LLVM bitcode -- and from there into object files, using LLVM.

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

Getting the Source Code and Building LLVM

Consult the Getting Started with LLVM page for information on building and running LLVM.

For information on how to contribute to the LLVM project, please take a look at the Contributing to LLVM guide.

Getting in touch

Join the LLVM Discourse forums, Discord chat, LLVM Office Hours or Regular sync-ups.

The LLVM project has adopted a code of conduct for participants to all modes of communication within the project.