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llvm / llvm-project / 4a4987be360ac7e4caad65bed54de4ed1d9342ed
commit4a4987be360ac7e4caad65bed54de4ed1d9342ed[log] [tgz]
authorUlrich Weigand <ulrich.weigand@de.ibm.com>Sat Mar 15 18:14:54 2025 +0100
committerUlrich Weigand <ulrich.weigand@de.ibm.com>Sat Mar 15 18:28:44 2025 +0100
tree935989e4fc96a42738e014cb452ead5d4196c65e
parentcdc786498650c028c9c8ce23dfbff81bf2780d14 [diff]
[SystemZ] Optimize vector zero/sign extensions

Generate more efficient code for zero or sign extensions where
the source is a subvector generated via SHUFFLE_VECTOR.

Specifically, recognize patterns corresponding to (series of)
VECTOR UNPACK instructions, or the VECTOR SIGN EXTEND TO
DOUBLEWORD instruction.

As a special case, also handle zero or sign extensions of a
vector element to i128.

Fixes: https://github.com/llvm/llvm-project/issues/129576
Fixes: https://github.com/llvm/llvm-project/issues/129899
10 files changed
tree: 935989e4fc96a42738e014cb452ead5d4196c65e
  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. libunwind/
  16. lld/
  17. lldb/
  18. llvm/
  19. llvm-libgcc/
  20. mlir/
  21. offload/
  22. openmp/
  23. polly/
  24. pstl/
  25. runtimes/
  26. third-party/
  27. utils/
  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. pyproject.toml
  38. README.md
  39. SECURITY.md
README.md

The LLVM Compiler Infrastructure

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