These test cases fail when the libcxx and libcxxabi runtimes are
built on Linux PowerPC. XFailing them until the issue is resolved.

This commit fixes a compilation warning caused by the printExpressionArg
function that previously returned LogicalResult instead of void.

The warning has been introduced by #73367.

Add:
* an Op for 'cp.async.mbarrier.arrive', targeting the
nvvm_cp_async_mbarrier_arrive* family of intrinsics.
* The 'noinc' intrinsic property is modelled as a default-valued-attr of
type I1.
* Test cases are added to verify the Op as well as the intrinsic
lowering.

Signed-off-by: Durgadoss R <durgadossr@nvidia.com>

Implement a selection of intrinsic module procedures that involve
exceptions.

 - IEEE_GET_FLAG
 - IEEE_GET_HALTING_MODE
 - IEEE_GET_MODES
 - IEEE_GET_STATUS
 - IEEE_LOGB
 - [f23] IEEE_MAX, IEEE_MAX_MAG, IEEE_MAX_NUM, IEEE_MAX_NUM_MAG
 - [f23] IEEE_MIN, IEEE_MIN_MAG, IEEE_MIN_NUM, IEEE_MIN_NUM_MAG
 - IEEE_QUIET_EQ, IEEE_QUIET_GE, IEEE_QUIET_GT,
 - IEEE_QUIET_LE, IEEE_QUIET_LT, IEEE_QUIET_NE
 - IEEE_SET_FLAG
 - IEEE_SET_HALTING_MODE
 - IEEE_SET_MODES
 - IEEE_SET_STATUS
 - IEEE_SIGNALING_EQ, IEEE_SIGNALING_GE, IEEE_SIGNALING_GT,
 - IEEE_SIGNALING_LE, IEEE_SIGNALING_LT, IEEE_SIGNALING_NE
 - IEEE_SUPPORT_FLAG
 - IEEE_SUPPORT_HALTING

Add spirv-dis (disassembler) and spirv-val (validator) from SPIRV-Tools
as external dependencies for testing the SPIR-V backend. These tools are
test dependencies only.

SPIR-V backend tests now have a dependency on the spirv-dis and
spirv-val targets when the `LLVM_INCLUDE_SPIRV_TOOLS_TESTS` cmake
variable is set, which allows additional test files with the `REQUIRES:
spirv-tools` constraint to run, along with additional `RUN: %if
spirv-tools ...` lines in existing tests. All other SPIR-V backend tests
will run normally when `LLVM_INCLUDE_SPIRV_TOOLS_TESTS` is not set.

Several tests are included to show these tools' use, however more tests
will be migrated and added later.
* OpVariable_order.ll shows how spirv-val can catch bugs in the backend.
* basic_int_types_spirvdis.ll shows how tests can be much shorter and
more readable by FileChecking the spirv-dis output.
* basic_int_types.ll shows how an additional RUN line can add validation
to existing tests.

RFC:
https://discourse.llvm.org/t/rfc-add-a-test-dependency-on-spirv-tools/75135

Add definitions for
broadcast, gather, receive, reduce, scatter, send and shift.

This patch removes the ArmSMETypeConverter, and instead updates
`populateArmSMEToLLVMConversionPatterns()` to add an ArmSME vector type
conversion to the existing LLVMTypeConverter. This makes it easier to
add these patterns to an existing `-to-llvm` lowering pass.

Following the discussion here:

  * https://github.com/llvm/llvm-project/pull/72105

this patch makes the `TransposeOpLowering` configurable so that one can select
whether to favour `vector.shape_cast` over `vector.transpose`.

As per the discussion in #72105, using `vector.shape_cast` is very beneficial
and desirable when targeting `LLVM IR` (CPU lowering), but won't work when
targeting `SPIR-V` today (GPU lowering). Hence the need for a mechanism to be
able to disable/enable the pattern introduced in #72105. This patch proposes one
such mechanism.

While this should solve the problem that we are facing today, it's understood to
be a temporary workaround. It should be removed once support for lowering
`vector.shape_cast` to SPIR-V is added. Also, (once implemented) the following
proposal might make this workaround redundant:

  * https://discourse.llvm.org/t/improving-handling-of-unit-dimensions-in-the-vector-dialect/

The minimum GCC version was bumped from 7.1 to 7.4 so garbage collect
the 7.2 workarounds.

https://reviews.llvm.org/D156286

Before this PR, readability-container-contains fix-its did not handle
integer literal suffixes correctly. It e.g. changed
```
  MyMap.count(2) != 0U;
```
into
```
  MyMap.contains(2)U;
```

With this PR, it correctly changes it to
```
  MyMap.contains(2);
```

This commit extends the class `SValBuilder` with the methods
`getMinValue()` and `getMaxValue()` to that work like
`SValBuilder::getKnownValue()` but return the minimal/maximal possible
value the `SVal` is not perfectly constrained.

This extension of the ConstraintManager API is discussed at:
https://discourse.llvm.org/t/expose-the-inferred-range-information-in-warning-messages/75192

As a simple proof-of-concept application of this new API, this commit
extends a message from `core.BitwiseShift` with some range information
that reports the assumptions of the analyzer.

My main motivation for adding these methods is that I'll also want to
use them in `ArrayBoundCheckerV2` to make the error messages less
awkward, but I'm starting with this simpler and less important usecase
because I want to avoid merge conflicts with my other commit
https://github.com/llvm/llvm-project/pull/72107 which is currently under
review.

The testcase `too_large_right_operand_compound()` shows a situation
where querying the range information does not work (and the extra
information is not added to the error message). This also affects the
debug utility `clang_analyzer_value()`, so the problem isn't in the
fresh code. I'll do some investigations to resolve this, but I think
that this commit is a step forward even with this limitation.

In commit b0533598 ("[X86InstrInfo] support memfold on spillable
inline asm
(#70832)"), I had a last minute fix to update the memoperands. I
originally
did this in the parent foldInlineAsmMemOperand call, updated the mir
test via
update_mir_test_checks.py, but then decided to move it to the child call
of
foldInlineAsmMemOperand.

But I forgot to rerun update_mir_test_checks.py. That last minute change
caused
the same memoperand to be added twice when recursion occurred (for tied
operands). I happened to get lucky that trailing content omitted from
the
CHECK line doesn't result in test failure.

But rerunning update_mir_test_checks.py on the mir test added in that
commit
produces updated output. This is resulting in updates to the test that:
1. conflate additions to the test in child commits with simply updating
the
   test as it should have been when first committed.
2. look wrong because the same memoperand is specified twice (we don't
   deduplicate memoperands when added). Example:

INLINEASM ... :: (load (s32) from %stack.0) (load (s32) from %stack.0)

Fix the bug, so that in child commits, we don't have additional
unrelated test
changes (which would be wrong anyways) from simply running
update_mir_test_checks.py.

Link: #20571

Fixes #41439

The documentation is update to say it is allowed to have omitted
parameter names if the variable is not used

Most addresses in SystemZ instructions take two registers,
an index register and a base register.  However, either of
those can be omitted.  If there is just a single register,
this usually is taken as the base register - however, there
are certain rare cases where you specifically want to use
an index register but no base register.  This is currently
not handled consistently by the assembler / disassembler.

Fix this by
 - always emitting a dummy 0 as base register for index-
   only addresses
 - correctly handle dummy 0 as indicating no base register
   when parsing an address

This is compatible with current GNU binutils behavior.

The __builtin_s390_vceq* family of builtins currently take
signed arguments with clang, but unsigned with GCC.  Update
clang to match existing GCC precendent.

The builtins that expand to the vlrl/vlrlr and vstrl/vstrlr
instructions are currently named inconsistently between GCC
and clang.  Rename the clang versions to match GCC.

Clang currently implements a set of vector rotate builtins
(__builtin_s390_verll*) in terms of platform-specific LLVM
intrinsics.  To simplify the IR (and allow for common code
optimizations if applicable), this patch removes those LLVM
intrinsics and implements the builtins in terms of the
platform-independent funnel shift intrinsics instead.

Also, fix the prototype of the __builtin_s390_verll*
builtins for full compatibility with GCC.

This PR introduce `nvvm.fence.proxy` OP for the following cases:

```
nvvm.fence.proxy { kind = #nvvm.proxy_kind<alias>}
nvvm.fence.proxy { kind = #nvvm.proxy_kind<async>}
nvvm.fence.proxy { kind = #nvvm.proxy_kind<async.global>}
nvvm.fence.proxy { kind = #nvvm.proxy_kind<async.shared>, space = #nvvm.shared_space<cta>}
nvvm.fence.proxy { kind = #nvvm.proxy_kind<async.shared>, space = #nvvm.shared_space<cluster>}
```

GPU dialect has `#gpu.address_space<workgroup>` for shared memory of
NVGPU (address space =3). Howeverm when IR combine NVGPU and GPU
dialect, `nvgpu-to-nvvm` pass fails due to missing attribute conversion.

This PR adds `populateGpuMemorySpaceAttributeConversions` to
nvgou-to-nvvm lowering, so we can use `#gpu.address_space<workgroup>`
`nvgpu-to-nvvm` pass

MinBWs contains entries that specify the minimum required bitwidth. In
some cases, the old and new bitwidths can be equal (see test case) and
in those cases no truncations are needed, so skip those cases.

Fixes #74307.

We can use Intrinsic::getDeclaration() here, we just have to pass
the correct arguments. This function accepts only the mangled types,
not all argument types.

Enable by default for optimization levels higher than 0 (same behavior
as clang).

For simplicity, only forward the flag to the frontend driver when it
contradicts what is implied by the optimization level.

This was first landed in
https://github.com/llvm/llvm-project/pull/73111 but was later reverted
due to a performance regression. That regression was fixed by
https://github.com/llvm/llvm-project/pull/74065.

In preparation for running clang-format on the whole code base, we are
also removing mentions of the legacy _LIBCPP_INLINE_VISIBILITY macro in
favor of the newer _LIBCPP_HIDE_FROM_ABI.

We're still leaving the definition of _LIBCPP_INLINE_VISIBILITY to avoid
creating needless breakage in case some older patches are checked-in
with mentions of the old macro. After we branch for LLVM 18, we can do
another pass to clean up remaining uses of the macro that might have
gotten introduced by mistake (if any) and remove the macro itself at the
same time. This is just a minor convenience to smooth out the transition
as much as possible.

See
https://discourse.llvm.org/t/rfc-clang-formatting-all-of-libc-once-and-for-all
for the clang-format proposal.

Fix ppc build bot

This PR introduces DIGlobalVariableAttr and
DIGlobalVariableExpressionAttr so that ModuleTranslation can emit the
required metadata needed for debug information about global variable.
The translator implementation for debug metadata needed to be refactored
in order to allow translation of nodes based on MDNode
(DIGlobalVariableExpressionAttr and DIExpression) in addition to
DINode-based nodes.

A DIGlobalVariableExpressionAttr can now be passed to the GlobalOp
operation directly and ModuleTranslation will create the respective
DIGlobalVariable and DIGlobalVariableExpression nodes. The compile unit
that DIGlobalVariable is expected to be configured with will be updated
with the created DIGlobalVariableExpression.

Make a modernize version of abseil-string-find-startswith using the
available C++20 `std::string::starts_with` and
`std::string_view::starts_with`. Following up from
https://github.com/llvm/llvm-project/pull/72283.

This patch continues the work started with ea5b1ef0. See that commit and its corresponding PR for details.

This patch changes the bounds generation code shared between OpenMP and OpenACC to always attach an extent to the bounds generation. This is
currently required for OpenMP descriptor lowering but may not
necessarily be required in the case of OpenACC.

Split off live-in printing to VPlan::printLiveIns and use it to print
Live-ins when printing in the DOT format.