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[VPlan] Use PSE to construct SCEVs in getSCEVExprForVPValue (NFCI).

getSCEVExprForVPValue is used to create SCEVs for expressions from the
original loop, which may be predicated. Use PSE to construct predicated
SCEVs if possible. This matches the legacy LV code behavior.

Currently should be NFC, but will enable migrating more SCEV/cost-based
computations to VPlan.

The patch requires exposing a new getPredicatedSCEV helper to
PredicatedScalarEvolution which just takes a SCEV, to avoid needing to
go through IR values, which isn't an option for getSCEVExprForVPValue.

readability-identifier-naming should add universal default options (#171686)

Adds a `DefaultCase` (and other options, but `DefaultPrefix/Suffix` is
probably not useful), which is used as a base in the override hierarchy.

Resolves #75688

massage cmake

massage cmake

[libcxx] Remove comment about manually installing ninja

This comment was addressed in 789ef89860e991f536b7ab896bf0562029804f58 but I
forgot to remove the comment. This PR addresses that.

[clang-tidy] Add C support to `misc-use-internal-linkage`

[SLP][NFC]Add parens to silence a warning message, NFC

[clang-tidy] Add C support to `misc-use-internal-linkage`

[LLDB] Improve error handling in TypeSystemClang::GetChildCompilerTypeAtIndex (#170932)

Convert the function to early exits, and add sensible error messages for
all failing checks.

TMP

TMP

[clang-tidy][NFC] Migrate away from `make_*` functions (#173191)

These seem to always have a better alternative (CTAD, braced init-list,
etc.)

[SLP]Enable float point math ops as copyables elements.

Patch enables support for float point math operations as base
instructions for copyable elements. It also fixes some scheduling
issues, found during testing

Reviewers: hiraditya, RKSimon

Pull Request: https://github.com/llvm/llvm-project/pull/169857

[NPM] Remove unused includes for CodeGenPassBuilder (#172575)

There are a couple around. Remove them to better comply with IWYU.

[Matrix][HLSL] Implement Matrix single constant index swizzle (#173044)

fixes #172805

For the constant case if we know the row index then we can compute the
offsets via `E->getEncodedElementAccess(Elts)`. We had to also add
column and row sizes to LValue so that we could compute the right index.
the emitter for `MatrixSingleSubscriptExpr` collects the sizes off the
type and passes it to `MakeMatrixRow`.

---------

Co-authored-by: Justin Bogner <mail at justinbogner.com>

TMP

Revert "[offload] Fix CUDA args size by subtracting tail padding (#172249)"

This reverts commit 35315a84b4a3b78deb876f0ac767696ad7e8aa50.

TMP

[SLP]Skip buildvector tree, if all scalars are used externally and remain scalar

If the buildvector is going to be vector with threshold cost < 0 and all
buildvector scalars are externally used and remain scalar, such a tree
should not be vectorized, it may lead to a compiler hang because same
scalars remain in the function and will be vectorized once again.

Fixes #172609

[clang-tidy] Add first-class C support to `misc-use-internal-linkage`

[LegalizeDAG] Return after replacing ISD::POISON with ISD::UNDEF. (#173173)

We already replaced the node, we shouldn't run the rest of the code that
still uses the old node.

[clang-tidy] Add first-class C support to `misc-use-internal-linkage`

[libc++] Mini-cleanup for `[[nodiscard]]` (#172275)

1. Remove incorrect `[[nodiscard]]` from compound assignment operators
in `<__filesystem/copy_options.h>`. Also add regression tests.
2. Add missing `[[nodiscard]]` mark for `mdspan::size` in
`<__mdspan/mdspan.h>` and test it.
3. Enable verifying `[[nodiscard]]` in C++03 for various components.
These components are either present in C++03 or backported by libc++
from C++11/17.

[llvm][unittests] Silence warning when building with MSVC

Fixes:
```
[836/1441] Building CXX object unittests\ExecutionEngine\Orc\CMakeFiles\OrcJITTests.dir\CallableTraitsHelperTest.cpp.obj
C:\git\llvm-project\llvm\unittests\ExecutionEngine\Orc\CallableTraitsHelperTest.cpp(25): warning C4551: function call missing argument list
C:\git\llvm-project\llvm\unittests\ExecutionEngine\Orc\CallableTraitsHelperTest.cpp(34): warning C4551: function call missing argument list
```

[Hexagon] Silence warnings with MSVC

Fixes:
```
[3400/4469] Building CXX object lib\Target\Hexagon\CMakeFiles\LLVMHexagonCodeGen.dir\HexagonVectorCombine.cpp.obj
C:\git\llvm-project\llvm\lib\Target\Hexagon\HexagonVectorCombine.cpp(2698): warning C4334: '<<': result of 32-bit shift implicitly converted to 64 bits (was 64-bit shift intended?)
C:\git\llvm-project\llvm\lib\Target\Hexagon\HexagonVectorCombine.cpp(2724): warning C4334: '<<': result of 32-bit shift implicitly converted to 64 bits (was 64-bit shift intended?)
```

InstCombine: Handle canonicalize in SimplifyDemandedFPClass

Doesn't try to handle PositiveZero flushing mode, but I
don't believe it is incorrect with it.

InstCombine: Add baseline test for canonicalize SimplifyDemandedFPClass

[LLVM][ADT] Make `scope-exit` CTAD-capable (#173131)

This enables using it like

```cpp
llvm::scope_exit Cleanup([] { ... });
```
instead of
```cpp
auto Cleanup = llvm::make_scope_exit([] { ... });
```

[MLIR][NVPTX] Add intrinsics and Ops to read smem-sizes (#173089)

This patch adds three intrinsics and their corresponding Ops
representing the PTX special-register read instructions
that report various configurations of shared-memory sizes.

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

InstCombine: Handle canonicalize in SimplifyDemandedFPClass

Doesn't try to handle PositiveZero flushing mode, but I
don't believe it is incorrect with it.