[all-commits] [llvm/llvm-project] 5feaef: [TBAA] Generate tbaa.struct single field with char...

[Florian Hahn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 5feaef63c08b6fefb6b0eaff2270ccb14740cca2
      https://github.com/llvm/llvm-project/commit/5feaef63c08b6fefb6b0eaff2270ccb14740cca2
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2024-03-11 (Mon, 11 Mar 2024)

  Changed paths:
    M clang/lib/CodeGen/CodeGenTBAA.cpp
    M clang/test/CodeGen/tbaa-struct.cpp

  Log Message:
  -----------
  [TBAA] Generate tbaa.struct single field with char tag for unions. (#84370)

At the moment,distinct fields for each union member are generated. When
copying a union, we don't know which union member is active, so there's
no benefit from recording the different fields. It can result in
converting tbaa.struct fields to incorrect tbaa nodes when extracting
fields.

PR: https://github.com/llvm/llvm-project/pull/84370



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