[qt/clang/llvm]: Summary of bulk changes made

Git repository change summary for qt/clang/llvm
Pushed by mirror-service into branch 'upstream/users/cchen/flang-metadirective-loop-default-none'.
Changed from e5f3ebe2e8a21877d8b91c4690ffd24c6f16ca04 to 3b80cd45daebaa1a898aed97356f8810e954c52f
Acknowledgement was received that this change introduces only existing code that has been pushed to another public open source repository.

This change contains the following new commits:

Git commit 83ba8addf60668a971453eed207f9bfdaa379f97 by GitHub (on behalf of Andrew Haberlandt) on 20/07/2026 at 17:18..
[compiler-rt] Move sanitizer ignorelists to sanitizer-ignorelists target (#200518)

This adds a `sanitizer-ignorelists` target to compiler-rt, allowing the
ignorelists to be built independently of the sanitizer runtimes. The
ignorelists are still built by default, but this change is not quite
NFC: when any of the sanitizers are built, all of the ignorelists will
be included (rather than the individual runtime ignorelists being built
with their respective runtimes).

For _why_ we want to be able to build these independently of the
runtimes, see
https://github.com/llvm/llvm-project/pull/195690#issuecomment-4384573223

I did not move the dfsan abilist to this new target because it is not as
straightforward as a copying a static file.

Assisted-by: Claude

rdar://175962064
https://invent.kde.org/qt/clang/llvm/-/commit/83ba8addf60668a971453eed207f9bfdaa379f97

Git commit d2e70aa7e546f7f2bbcf398b42151e464ce1098e by GitHub (on behalf of Alex Langford) on 20/07/2026 at 17:29..
[lldb] Remove unused method DynamicLoaderDarwin::ImageInfo::FindSegment (#210155)

This method is unused.
https://invent.kde.org/qt/clang/llvm/-/commit/d2e70aa7e546f7f2bbcf398b42151e464ce1098e

Git commit b559a53427f926a603a1755f60d98e06e2b7e1d2 by GitHub (on behalf of A. Jiang) on 20/07/2026 at 17:29..
[libc++][docs] Avoid talking about other implementations on DR status (#210637)

Standard library implementations consistently treat (or will
consistently treat) some LWG papers as Defect Reports that are also
applied to old modes, despite that they are not officially listed as
Defect Reports in WG21 meeting minutes. We used to say "other
implementations (namely MSVC STL and libstdc++) will do the same" for
some of them.

However, such sentences will become outdated soon when other
implementations actually do so. It is possibly better to avoid saying
so, which potentially requires synchronizing our documentation with
other implementations.
https://invent.kde.org/qt/clang/llvm/-/commit/b559a53427f926a603a1755f60d98e06e2b7e1d2

Git commit 3b80cd45daebaa1a898aed97356f8810e954c52f by chichunchen on 20/07/2026 at 17:33..
[flang][OpenMP] Check DEFAULT(NONE) on metadirective loop variants

Flang does not enforce `DEFAULT(NONE)` for variables referenced in a loop
associated with a standalone METADIRECTIVE. Consequently, it accepts invalid
programs when a potentially selectable loop variant specifies DEFAULT(NONE) but
omits a referenced variable from its data-sharing clauses. This change checks the
associated loop for each potentially selectable `DEFAULT(NONE)` variant and
diagnoses missing data-sharing attributes as it does for ordinary OpenMP loop
constructs.

Standalone metadirectives and their associated loops are separate parse-tree
nodes. For example:

```fortran
!$omp metadirective &
!$omp& when(implementation={vendor(llvm)}: &
!$omp& parallel do default(none) shared(n, a)) default(nothing)
do i = 1, n
  a(i) = x
end do
```

Unlike an ordinary `PARALLEL DO`, the loop is not nested under the directive:

```text
METADIRECTIVE
`-- WHEN
    `-- PARALLEL DO DEFAULT(NONE) SHARED(n, a)

DO
`-- a(i) = x
```

Name resolution therefore leaves the variant context before visiting the loop and
does not diagnose the missing data-sharing attribute for `x`.

After associating a metadirective with its loop, validate DEFAULT(NONE) for each
potentially selectable loop variant. Preserve the existing rules for
predetermined and explicit data-sharing attributes, static locals, nested
constructs, specification expressions, and statically inapplicable variants.

Assisted with codex.
https://invent.kde.org/qt/clang/llvm/-/commit/3b80cd45daebaa1a898aed97356f8810e954c52f