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

Git repository change summary for qt/clang/llvm-project
Pushed by mirror-service into branch 'upstream/users/pierre-vh/add-splitmodule-caching'.
Changed from 0000000000000000000000000000000000000000 to 73246d0ae26a2adcd9673168e8dae76ea9317ec3
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-project/-/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-project/-/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-project/-/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-project/-/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-project/-/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-project/-/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-project/-/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-project/-/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-project/-/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-project/-/commit/5c0a7212c8c8c46969489ae1ee85df1141a76bbb

Git commit 73246d0ae26a2adcd9673168e8dae76ea9317ec3 by pvanhout on 27/07/2026 at 08:57..
[lld] Add caching for `--lto-partitions`

Add an opt-in cache for the (full) LTO partitions generated via `--lto-partitions=N` when `N > 1`.
This is primarily for AMDGPU but implemented in a target-agnostic way. The goal is to avoid recompiling entire very large modules (can be hundreds of megabytes of bitcode) if someone just changed a single function or two, which don't affect most partitions.

This uses the LTO Config hash + a hash of the bitcode module itself. This is a very conservative approach, we may be able to fine-tune it to improve cache hits if it turns out the hit rate is poor.

Solves LCOMPILER-59
https://invent.kde.org/qt/clang/llvm-project/-/commit/73246d0ae26a2adcd9673168e8dae76ea9317ec3