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llvm / llvm-project / aeaf319b8c2207eb747079529f28d44d54bf1fd5
commitaeaf319b8c2207eb747079529f28d44d54bf1fd5[log] [tgz]
authorjeanPerier <jperier@nvidia.com>Wed Jun 25 09:41:33 2025 +0200
committerGitHub <noreply@github.com>Wed Jun 25 09:41:33 2025 +0200
tree8bbc9630b562aa63f4a6edb211081845476b8ba4
parent31545ca5f467fb0860ed3d09313451d547e41f5d [diff]
[flang] avoid useless rebox of polymorphic scalars (#145507)

Do not create new descriptor for polymorphic scalars when lowering
hlfir.declare.

hlfir.declare of box/class is lowered to a fir.rebox to ensure that
local lower bounds and descriptor attributes (Pointer/Allocatable/None)
are properly set-up in the descriptor associated to the symbol.

For polymorphic scalar, this created a useless temporary descriptor.
This was breaking invalid code #145256 that violates OPTIONAL usage
rules. I am not fixing it primarily to support this invalid code, but
rather because it is dumb to create a useless fir.rebox.
2 files changed
tree: 8bbc9630b562aa63f4a6edb211081845476b8ba4
  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. runtimes/
  25. third-party/
  26. utils/
  27. .clang-format
  28. .clang-format-ignore
  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

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