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llvm / llvm-project / f059d2bac034acca39ad60a1b13aaec6afa0a3d6
commitf059d2bac034acca39ad60a1b13aaec6afa0a3d6[log] [tgz]
authorTomer Shafir <tomer.shafir8@gmail.com>Wed Sep 10 08:32:51 2025 +0300
committerGitHub <noreply@github.com>Wed Sep 10 08:32:51 2025 +0300
treec7e08c01e8753411ae891fab0214da628c2383f0
parent127d77d279de6547324c87f393164c604297c4d4 [diff]
[AArch64] Lower zero cycle FPR zeroing (#156261)

Lower FPR64, FPR32, FPR16 from `fmov` zeroing into NEON zeroing if the
target supports zero cycle zeroing of NEON registers but not for the
narrower classes.

It handles 2 cases: one in `AsmPrinter` where a FP zeroing from
immediate has been captured by pattern matching on instruction
selection, and second post RA in `AArch64InstrInfo::copyPhysReg` for
uncaptured/later-generated WZR/XZR fmovs.

Adds a subtarget feature called FeatureZCZeroingFPR128 that enables to
query wether the target supports zero cycle zeroing for FPR128 NEON
registers, and updates the appropriate processors.
15 files changed
tree: c7e08c01e8753411ae891fab0214da628c2383f0
  1. .ci/
  2. .github/
  3. bolt/
  4. clang/
  5. clang-tools-extra/
  6. cmake/
  7. compiler-rt/
  8. cross-project-tests/
  9. flang/
  10. flang-rt/
  11. libc/
  12. libclc/
  13. libcxx/
  14. libcxxabi/
  15. libsycl/
  16. libunwind/
  17. lld/
  18. lldb/
  19. llvm/
  20. llvm-libgcc/
  21. mlir/
  22. offload/
  23. openmp/
  24. orc-rt/
  25. polly/
  26. runtimes/
  27. third-party/
  28. utils/
  29. .clang-format
  30. .clang-format-ignore
  31. .clang-tidy
  32. .git-blame-ignore-revs
  33. .gitattributes
  34. .gitignore
  35. .mailmap
  36. CODE_OF_CONDUCT.md
  37. CONTRIBUTING.md
  38. LICENSE.TXT
  39. pyproject.toml
  40. README.md
  41. 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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