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llvm / llvm-project / cfd13cbac12b73069c79c89bb37294f77938bb3f
commitcfd13cbac12b73069c79c89bb37294f77938bb3f[log] [tgz]
authorCraig Topper <craig.topper@sifive.com>Mon Aug 05 16:02:57 2024 -0700
committerCraig Topper <craig.topper@sifive.com>Mon Aug 05 16:02:57 2024 -0700
tree9b5f23c88551179d1dbdde74864a07299e950dc1
parent4745bb3e7db6d9cf5588171a433f534e5b488c70 [diff]
[RISCV] Improve variable scoping in custom isel for ISD::AND.

Give the (and (srl/shl X, C2), C1) handling its owns private `C1` variable
it can modify using known zeros. This may be out of sync with
N1C->getZExtValue().

Add a separate const C1 for (and (sra X, C2), C1) and (and X, C).
This copy will always be in sync with N1C->getZExtValue().

Remove the IsC1Mask and IsC1ANDI variables and compute them at their
usage.

Use N1C->getSExtValue() when calling isInt. This shouldn't be a
functional change since we already checked that it was a mask. In
order for it to be a mask and a negative number, it would need to be -1
which should have been removed by DAG combine.
1 file changed
tree: 9b5f23c88551179d1dbdde74864a07299e950dc1
  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.

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