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

Git repository change summary for qt/clang/llvm
Pushed by mirror-service into branch 'upstream/users/wangpc-pp/spr/riscvmc-support-experimental-zilx-extension'.
Changed from aea6a243752cb844c9cc5701f3d524dc01e30052 to 71bf7bd5dbc87e2390dc40a6db8b85bf4bd9d457
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 13706f1c73b91f74a8a555748b68362fbb5d698f by GitHub (on behalf of Matt Arsenault) on 27/07/2026 at 05:46..
AMDGPU: Migrate misc. tests to subarch triples (#211585)
https://invent.kde.org/qt/clang/llvm/-/commit/13706f1c73b91f74a8a555748b68362fbb5d698f

Git commit 5271fd9e65fb235fedd484cfc3710679744bdf46 by GitHub (on behalf of Lang Hames) on 27/07/2026 at 06:17..
[orc-rt] Session::HandlerTag -> orc_rt_ControllerHandlerTag (#212173)

Replace the `Session::HandlerTag = void*` type alias with
orc_rt_ControllerHandlerTag. The intent is both to make this type
accessible to the C API, and to rename it to clarify its role as a tag
for handlers in the controller that are callable by the executor.
https://invent.kde.org/qt/clang/llvm/-/commit/5271fd9e65fb235fedd484cfc3710679744bdf46

Git commit 820b5cb6d9fe8feda01fbb8b86d68aea10c63130 by GitHub (on behalf of Cullen Rhodes) on 27/07/2026 at 06:37..
[AArch64] Mark ZT0 register class as non-allocatable (#211750)

ZT0 is not available for register allocation, define it with the other
non-allocatable SME register classes and avoid an unnecessary pressure
set.

Assisted-by: codex
https://invent.kde.org/qt/clang/llvm/-/commit/820b5cb6d9fe8feda01fbb8b86d68aea10c63130

Git commit ed3470ffd1222be4aa4d6f938e6ba0fae5a2fad7 by GitHub (on behalf of Fangrui Song) on 27/07/2026 at 07:21..
[ELF] Fix -Wc++11-narrowing error in addPltEntry (#212185)

PR #212161 passes the `uint8_t isPreemptible : 1` bit-field straight
into a braced-init-list slot whose parameter type is `bool`.
Older clang (<20 ?) incorrectly rejects it.

```
error: non-constant-expression cannot be narrowed from type 'uint8_t' (aka 'unsigned char') to 'bool' in initializer list [-Wc++11-narrowing]
```
https://invent.kde.org/qt/clang/llvm/-/commit/ed3470ffd1222be4aa4d6f938e6ba0fae5a2fad7

Git commit 0cc7159125eacd3abdff94eb7e634c1a8f889d1e by GitHub (on behalf of Rainer Orth) on 27/07/2026 at 07:54..
[sanitizer_common][tests] Skip MemoryMapping::ParseUnixMemoryProfile … (#212114)

…etc. on NetBSD

The `Sanitizer-x86_64-Test` test doesn't link on NetBSD/amd64 10.1:

```
/usr/bin/ld: /usr/bin/ld: DWARF error: invalid or unhandled FORM value: 0x25
SANITIZER_TEST_OBJECTS.sanitizer_procmaps_test.cpp.x86_64.o: in function `__sanitizer::MemoryMapping_ParseUnixMemoryProfile_Test::TestBody()':
sanitizer_procmaps_test.cpp:(.text._ZN11__sanitizer41MemoryMapping_ParseUnixMemoryProfile_Test8TestBodyEv+0x52): undefined reference to `__sanitizer::ParseUnixMemoryProfile(void (*)(unsigned long, unsigned long, bool, unsigned long*), unsigned long*, char*, unsigned long)'
/usr/bin/ld: SANITIZER_TEST_OBJECTS.sanitizer_procmaps_test.cpp.x86_64.o: in function `__sanitizer::MemoryMapping_ParseUnixMemoryProfileTruncated_Test::TestBody()':
sanitizer_procmaps_test.cpp:(.text._ZN11__sanitizer50MemoryMapping_ParseUnixMemoryProfileTruncated_Test8TestBodyEv+0x17a): undefined reference to `__sanitizer::ParseUnixMemoryProfile(void (*)(unsigned long, unsigned long, bool, unsigned long*), unsigned long*, char*, unsigned long)'

```

Fixed by skipping the affected subtest.

Tested on `amd64-pc-netbsd10.1` and `x86_64-pc-linux-gnu`.
https://invent.kde.org/qt/clang/llvm/-/commit/0cc7159125eacd3abdff94eb7e634c1a8f889d1e

Git commit b66306c2419ecbb5e02e63728c54814647f0e06c by GitHub (on behalf of Nikita Popov) on 27/07/2026 at 07:54..
[SelectionDAG] Stop forming minnum/maxnum in SDAGBuilder (#187738)

The right place to form these is DAGCombine, not SDAGBuilder. This
removes the SPNB_RETURNS_ANY case, the SPNB_RETURNS_OTHER is left to a
followup. We need to propagate FMF flags in a few more places to make
this work.
https://invent.kde.org/qt/clang/llvm/-/commit/b66306c2419ecbb5e02e63728c54814647f0e06c

Git commit 102f572188c5dbf89d92bf533a4bdc4fed1d89bd by GitHub (on behalf of Rainer Orth) on 27/07/2026 at 07:55..
[llvm][cas] Fix OnDiskCASLoggerTest.cpp compilation on NetBSD (#212113)

`CAS/OnDiskCASLoggerTest.cpp` doesn't compile on NetBSD/amd64:

```
In member function `virtual void OnDiskCASLoggerTest_MultiProcess_Test::TestBody()':
llvm/unittests/CAS/OnDiskCASLoggerTest.cpp:230:19: error: reference to `Wait' is ambiguous
  230 |     auto Result = Wait(PI, /*Timeout=*/15, &Error);
      |                   ^~~~
In file included from llvm/unittests/CAS/OnDiskCASLoggerTest.cpp:15:
llvm/include/llvm/Support/Program.h:212:22: note: candidates are: `llvm::sys::ProcessInfo llvm::sys::Wait(const llvm::sys::ProcessInfo&, std::optional<unsigned int>, std::string*, std::optional<llvm::sys::ProcessStatistics>*, bool)'
  212 | LLVM_ABI ProcessInfo Wait(
      |                      ^~~~
In file included from llvm/include/llvm/Support/RWMutex.h:17,
                 from llvm/include/llvm/Support/ThreadPool.h:21,
                 from llvm/unittests/CAS/OnDiskCASLoggerTest.cpp:16:
llvm/include/llvm/Support/Threading.h:60:40: note:                 `llvm::InitStatus llvm::Wait'
   60 |   enum InitStatus { Uninitialized = 0, Wait = 1, Done = 2 };
      |                                        ^~~~
```

This patch removes the ambiguity, matching other uses.

Tested on `amd64-pc-netbsd10.1` and `x86_64-pc-linux-gnu`.
https://invent.kde.org/qt/clang/llvm/-/commit/102f572188c5dbf89d92bf533a4bdc4fed1d89bd

Git commit f91647a732298131e86fc4f465b20b80105f35d6 by GitHub (on behalf of Rainer Orth) on 27/07/2026 at 07:56..
[llvm][release] Build openmp as runtime in test-release.sh (#212111)

`test_release.sh` tries to build `openmp` as a project, which breaks the
build:

```
CMake Error at CMakeLists.txt:155 (message):

  Support for the LLVM_ENABLE_PROJECTS=openmp build mode has been removed.
  Please switch to the bootstrapping build

      cmake -S <llvm-project>/llvm -B build -DLLVM_ENABLE_PROJECTS=clang -DLLVM_ENABLE_RUNTIMES=openmp

  or to the runtimes default build

      cmake -S <llvm-project>/runtimes -B build -DLLVM_ENABLE_RUNTIMES=openmp
```

This patch switches it to a runtime to match.

Tested on `x86_64-pc-linux-gnu`.
https://invent.kde.org/qt/clang/llvm/-/commit/f91647a732298131e86fc4f465b20b80105f35d6

Git commit 30a1b346f5c84504e5e998cb45e6551d21645e21 by GitHub (on behalf of Jared Wyles) on 27/07/2026 at 08:08..
[orc-rt] Add StringExtras::join from llvm/adt and tests (#212179)

Tests are appropriate to the use cases that will follow in a PR to
follow.
https://invent.kde.org/qt/clang/llvm/-/commit/30a1b346f5c84504e5e998cb45e6551d21645e21

Git commit 5c0a7212c8c8c46969489ae1ee85df1141a76bbb by GitHub (on behalf of Felipe de Azevedo Piovezan) on 27/07/2026 at 08:11..
[lldb][NFC] Add documentation for OperatingSystem methods (#210968)
https://invent.kde.org/qt/clang/llvm/-/commit/5c0a7212c8c8c46969489ae1ee85df1141a76bbb

Git commit 3deca05e273382820a164e7acf3efe0c0e441a23 by GitHub (on behalf of Cullen Rhodes) on 27/07/2026 at 08:20..
[AArch64] Remove unused GPR32arg register class (NFC) (#211778)

GPR32arg was added alongside GPR64arg in fcbec02ea6fb, but has no users
outside the register info generated by TableGen.

Assisted-by: codex
https://invent.kde.org/qt/clang/llvm/-/commit/3deca05e273382820a164e7acf3efe0c0e441a23

Git commit bb75638cb7fa090bb6e4c4c3e6e15e693a69b1d1 by GitHub (on behalf of Utkarsh Saxena) on 27/07/2026 at 08:23..
[LifetimeSafety][NFC] Refactor AccessPath and Loan representations
 (#180369)

This patch refactors the internal representations of `AccessPath` and
`Loan` to support path elements, preparing for field-sensitive and
interior-sensitive lifetime tracking.
* Introduces `PathElement` representing a field or interior dereference.
* Refactors `AccessPath` to contain a base and a list of `PathElement`s.
* Updates `Loan` and `LoanManager` to use the new `AccessPath`
structure.

---
Old PR description:

Refactor loan representation to use structured access paths, enabling
more precise borrow tracking and detection of use-after-invalidation.

Previously, loans were associated only with top-level storage (e.g., a
variable `x`, temporary `t`). This was insufficient for reasoning about
borrows of sub-objects (interior memory regions), such as fields (`x.f`)
or container elements (`vec[0]`), or for modelling views like
`string_view` which borrow the interior of an object.

We modify `AccessPath`, which now consists of a `base` (a _variable_,
_temporary_, or _placeholder_ for _parameters/'this'_) and a sequence of
`PathElements`. A `PathElement` can be a field access (`.field`) or an
interior access (denoted as `.*`), representing an unnamed interior
memory region of an object, like the character buffer of a
`std::string`.

High-level changes:
* `PathLoan` and `PlaceholderLoan` are merged into a single Loan class,
containing an `AccessPath`.
* **Path-Based Expiry**: `ExpireFact` is changed from expiring a single
loan to expiring an `AccessPath`. If `x` goes out of scope, any loan
whose path starts with `x` (e.g., loans to `x`, `x.field`, `x.field.*`)
is now considered expired. The checker uses `isPrefixOf` to detect this.
* **Path Extension in Flows**: `OriginFlowFact` now supports extending
loan paths:
* Field access like for expression `obj.field` extends loans to `obj`
into loans to `obj.field`.
* Owner-to-view conversions like `std::string_view s(str)` extend loans
to `str` into loans to `str.*`.
* **Invalidation**: Container invalidation methods (e.g.,
`vec.push_back()`) invalidate loans whose path is a strict extension of
the container's path (e.g., loans to `vec.*` but not loans to `vec`).
The checker uses `isStrictPrefixOf`.
* **Move-Tracking**: Moves are now tracked based on path prefixes via
`isPrefixOf`.

This refactoring enables detection of use-after-invalidation bugs for
STL containers specially when the container appears as fields.
https://invent.kde.org/qt/clang/llvm/-/commit/bb75638cb7fa090bb6e4c4c3e6e15e693a69b1d1

Git commit a6633d1631c72da496fd25ac21cd1a6b8e2400b0 by Pengcheng Wang on 27/07/2026 at 09:18..
Change asm syntax

Created using spr 1.3.6-beta.1
https://invent.kde.org/qt/clang/llvm/-/commit/a6633d1631c72da496fd25ac21cd1a6b8e2400b0

Git commit 71bf7bd5dbc87e2390dc40a6db8b85bf4bd9d457 by Pengcheng Wang on 27/07/2026 at 09:31..
Use let append

Created using spr 1.3.6-beta.1
https://invent.kde.org/qt/clang/llvm/-/commit/71bf7bd5dbc87e2390dc40a6db8b85bf4bd9d457