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llvm / llvm-project / f01364ebc88d875fbfc0e00413538465aaa8a2b3
commitf01364ebc88d875fbfc0e00413538465aaa8a2b3[log] [tgz]
authorSirraide <aeternalmail@gmail.com>Tue Oct 08 13:34:00 2024 +0200
committerGitHub <noreply@github.com>Tue Oct 08 13:34:00 2024 +0200
tree5f5e41ceab9a3410f615a91520afc639c7942267
parent235067b222e4734839b963e152b6554e20413d11 [diff]
[Clang] Instantiate the correct lambda call operator (#110446)

This is a fix for the following issue: when a lambda’s class type is
merged across modules (e.g. because it is defined in a template in the
GMF of some module `A`, and some other module `B` both imports `A` and
has the same template in its GMF), then `getLambdaCallOperator()` might
return the wrong operator (e.g. while compiling `B`, the lambda’s class
type would be the one attached to `B`’s GMF, but the call operator ends
up being the one attached to `A`’s GMF).

This causes issues in situations where the call operator is in a
template and accesses declarations in the surrounding context: when
those declarations are instantated, a mapping is introduced from the
original node in the template to that of the instantiation. If such an
instantiation happens in `B`, and we then try to instantiate `A`’s call
operator, any nodes in that call operator refer to declarations in the
template in `A`, but the `LocalInstantiationScope` only contains
mappings for declarations in `B`! This causes the following assertion
(for godbolt links and more, see the issue below):

```
Assertion `isa<LabelDecl>(D) && "declaration not instantiated in this scope"' failed.
```

We now walk the redecl chain of the call operator to find the
one that is in the same module as the record decl.

This fixes #110401.
3 files changed
tree: 5f5e41ceab9a3410f615a91520afc639c7942267
  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

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