[all-commits] [llvm/llvm-project] 060137: Reapply "[Clang][CWG1815] Support lifetime extensi...

[yronglin via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 060137038ab9246b377e190ae3c6f272fa57cbfc
      https://github.com/llvm/llvm-project/commit/060137038ab9246b377e190ae3c6f272fa57cbfc
  Author: yronglin <yronglin777 at gmail.com>
  Date:   2024-09-12 (Thu, 12 Sep 2024)

  Changed paths:
    M clang/docs/ReleaseNotes.rst
    M clang/include/clang/Basic/DiagnosticSemaKinds.td
    M clang/include/clang/Sema/Sema.h
    M clang/lib/Parse/ParseDecl.cpp
    M clang/lib/Sema/CheckExprLifetime.cpp
    M clang/lib/Sema/SemaExpr.cpp
    M clang/lib/Sema/SemaExprCXX.cpp
    M clang/lib/Sema/SemaInit.cpp
    M clang/lib/Sema/SemaTemplateInstantiateDecl.cpp
    M clang/lib/Sema/TreeTransform.h
    M clang/test/AST/ast-dump-default-init-json.cpp
    M clang/test/AST/ast-dump-default-init.cpp
    M clang/test/Analysis/lifetime-extended-regions.cpp
    M clang/test/CXX/drs/cwg16xx.cpp
    M clang/test/CXX/drs/cwg18xx.cpp
    M clang/test/CXX/special/class.temporary/p6.cpp
    A clang/test/SemaCXX/PR97308.cpp
    M clang/test/SemaCXX/constexpr-default-arg.cpp
    M clang/test/SemaCXX/cxx11-default-member-initializers.cpp
    M clang/test/SemaCXX/eval-crashes.cpp
    M clang/www/cxx_dr_status.html

  Log Message:
  -----------
  Reapply "[Clang][CWG1815] Support lifetime extension of temporary created by aggregate initialization using a default member initializer" (#108039)

The PR reapply https://github.com/llvm/llvm-project/pull/97308. 

- Implement [CWG1815](https://wg21.link/CWG1815): Support lifetime
extension of temporary created by aggregate initialization using a
default member initializer.

- Fix crash that introduced in
https://github.com/llvm/llvm-project/pull/97308. In
`InitListChecker::FillInEmptyInitForField`, when we enter
rebuild-default-init context, we copy all the contents of the parent
context to the current context, which will cause the `MaybeODRUseExprs`
to be lost. But we don't need to copy the entire context, only the
`DelayedDefaultInitializationContext` was required, which is used to
build `SourceLocExpr`, etc.

---------

Signed-off-by: yronglin <yronglin777 at gmail.com>



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