This patch adds a new transform operation `transform.loop.fuse_sibling`,
which given two loops, fuses them, assuming that they are independent.
The transform operation itself performs very basic checks to ensure
IR legality, and leaves the responsibility of ensuring independence on the user.

Reviewed By: ftynse

Differential Revision: https://reviews.llvm.org/D157069

Reviewed By: SixWeining

Differential Revision: https://reviews.llvm.org/D157574

Reviewed By: SixWeining

Differential Revision: https://reviews.llvm.org/D157573

The testcases mainly cover three situations:
- the arguments which should be immediates are non immediates.
- the immediate is out of upper limit of the argument type.
- the immediate is out of lower limit of the argument type.

Depends on D155830

Reviewed By: SixWeining

Differential Revision: https://reviews.llvm.org/D157571

Depends on D155830

Reviewed By: SixWeining

Differential Revision: https://reviews.llvm.org/D155835

Depends on D155829

Reviewed By: SixWeining

Differential Revision: https://reviews.llvm.org/D155834

This patch is similar to D155829.

Depends on D155829

Reviewed By: SixWeining

Differential Revision: https://reviews.llvm.org/D155830

For handling intrinsics, our approach is not simply to match them
one-to-one with instructions. Instead, we lower some intrinsics
to common nodes and then perform matching. The advantage of this
approach is that it allows us to fully utilize the passes available
at the common layer for optimizing purposes.

We perform error checks on the immediate operand of all intrinsics,
rather than waiting until the end to throw exceptions.

Reviewed By: SixWeining

Differential Revision: https://reviews.llvm.org/D155829

Targets may lose some optimization opportunities for certain vector operation
if we reduce BUILD_VECTOR to BITCAST early.

And if VT is not legal, reduce BUILD_VECTOR to BITCAST before LegailizeTypes
can get benefit. Because type-legalizer often scalarizes illegal type of vectors.

Reviewed By: sebastian-ne

Differential Revision: https://reviews.llvm.org/D156645

If we know the thread count statically and it is a constant, we can set
the "amdgpu-flat-work-group-size" kernel attribute.

Fixes https://github.com/llvm/llvm-project/issues/64816 in parts.

All of them have prefix 'X' in DecoderNamespace.

HI/LO registers have been removed in MIPSr6. Save and restore them only for pre-R6.

We keep the memory space for the registers so that we can use the same register indexes for
r6 and pre-r6.

Fixes: #60682

Reviewed By: compnerd

Differential Revision: https://reviews.llvm.org/D156283

Reviewed By: myhsu

Differential Revision: https://reviews.llvm.org/D116993

Fixes https://github.com/clangd/clangd/issues/1734

Differential Revision: https://reviews.llvm.org/D158249

The previous behaviour is to try to parse such files, and in some
cases assert or hang in components that don't expect these forms of
input, like TokenBuffer.

Fixes https://github.com/llvm/llvm-project/issues/62090

Differential Revision: https://reviews.llvm.org/D149236

This patch focuses on power of 2 bytes up to 2x XLen with and without alignment. Other cases will be handled in future patches.

Reviewed By: nitinjohnraj

Differential Revision: https://reviews.llvm.org/D157828

Plus bonus typo fix

Differential Revision: https://reviews.llvm.org/D158248

This CL includes two changes:
1. moved clang backend-warnings test cases from Driver/ to CodeGen/.
2. removed multiple `cd "$(dirname "%t")"` and replaced with `-o %t`.

Reviewed By: maskray (Fangrui Song)
Differential Revision: https://reviews.llvm.org/D157565

Refactor the getFixIts function for better readability.

Reviewed by: NoQ (Artem Dergachev), t-rasmud (Rashmi Mudduluru)

Differential revision: https://reviews.llvm.org/D156762

Add records, serialization for global function templates and their specializations

Depends on D157350

Reviewed By: dang

Differential Revision: https://reviews.llvm.org/D157579

RISC-V doesn't have flag registers, we need to implement these
with add/sub and compares.

Remove the untested legalization for the signed versions. We can
add it back when we write tests.

Reviewed By: nitinjohnraj

Differential Revision: https://reviews.llvm.org/D157772

cast PredefinedExpr such as `__func__` to const char* should be accpetted.

Reviewed By: PiotrZSL

Differential Revision: https://reviews.llvm.org/D158244

Thread sanitizer reports a data race in Process.cpp in the usage of
m_process_input_reader. Fix this data race by introducing a mutex
guarding the access to this variable.

Differential Revision: https://reviews.llvm.org/D157648

ThreadSanitizer reports the following issue:

```
  Write of size 8 at 0x00010a70abb0 by thread T3 (mutexes: write M0):
    #0 lldb_private::ThreadList::Update(lldb_private::ThreadList&) ThreadList.cpp:741 (liblldb.18.0.0git.dylib:arm64+0x5dedf4) (BuildId: 9bced2aafa373580ae9d750d9cf79a8f32000000200000000100000000000e00)
    #1 lldb_private::Process::UpdateThreadListIfNeeded() Process.cpp:1212 (liblldb.18.0.0git.dylib:arm64+0x53bbec) (BuildId: 9bced2aafa373580ae9d750d9cf79a8f32000000200000000100000000000e00)

  Previous read of size 8 at 0x00010a70abb0 by main thread (mutexes: write M1):
    #0 lldb_private::ThreadList::GetMutex() const ThreadList.cpp:785 (liblldb.18.0.0git.dylib:arm64+0x5df138) (BuildId: 9bced2aafa373580ae9d750d9cf79a8f32000000200000000100000000000e00)
    #1 lldb_private::ThreadList::DidResume() ThreadList.cpp:656 (liblldb.18.0.0git.dylib:arm64+0x5de5c0) (BuildId: 9bced2aafa373580ae9d750d9cf79a8f32000000200000000100000000000e00)
    #2 lldb_private::Process::PrivateResume() Process.cpp:3130 (liblldb.18.0.0git.dylib:arm64+0x53cd7c) (BuildId: 9bced2aafa373580ae9d750d9cf79a8f32000000200000000100000000000e00)
```

Fix this by only using the mutex in ThreadList and removing the one in
process entirely.

Differential Revision: https://reviews.llvm.org/D158034

AAIndirectCallInfo will collect information and specialize indirect call
sites. It is similar to our IndirectCallPromotion but runs as part of
the Attributor (so with assumed callee information). It also expands
more calls and let's the rest of the pipeline figure out what is UB, for
now. We use existing call promotion logic to improve the result,
otherwise we rely on the (implicit) function pointer cast.

This effectively "fixes" #60327 as it will undo the type punning early
enough for the inliner to work with the (now specialized, thus direct)
call.

Fixes: https://github.com/llvm/llvm-project/issues/60327

To work around an address sanitizer issue on macOS where
environment_check prints a spurious stderr msg when executing,

environment_check(41292,0x113e7a600) malloc: nano zone abandoned due to inability to preallocate reserved vm space.

And TestClient::Continue() which intends to continue to exit
instead sees the stderr output streamed, and doesn't handle that
unexpected output.  Easiest to disable stdin/stdout for this
one test case to avoid this corner case issue with this TestClient.cpp
way of expecting a stop reply packet after continuing.

Differential Revision: https://reviews.llvm.org/D158237

Reviewed By: mehdi_amini

Differential Revision: https://reviews.llvm.org/D158212

Obsoleted by target=