[all-commits] [llvm/llvm-project] 895c61: [clang] fix merging of UsingShadowDecl

[Matheus Izvekov via All-commits]

  Branch: refs/heads/users/mizvekov/bug/clang-merge-usingshadowdecl
  Home:   https://github.com/llvm/llvm-project
  Commit: 895c615a354d540c4e4404fa728bfad2a962c7bf
      https://github.com/llvm/llvm-project/commit/895c615a354d540c4e4404fa728bfad2a962c7bf
  Author: Matheus Izvekov <mizvekov at gmail.com>
  Date:   2024-02-01 (Thu, 01 Feb 2024)

  Changed paths:
    M clang/docs/ReleaseNotes.rst
    M clang/test/Modules/cxx20-decls.cppm

  Log Message:
  -----------
  [clang] fix merging of UsingShadowDecl

Previously, when deciding if two UsingShadowDecls where mergeable,
we would incorrectly only look for both pointing to the exact redecla
ration, whereas the correct thing is to look for declarations to the
same entity.

This problem has existed as far back as 2013, introduced in commit
fd8634a09de71.

This problem could manifest itself as ODR check false positives
when importing modules.

Fixes: #80252