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[NFC][mlir][AMDGPU] Partition dialect .td into multiple files (#178562)

Follow the style of other dialects by having a distiinct .td file for
each category of thing (type, attribdut, operation, enum) generated for
the AMDGPU dialect.

Nothing has changed, but a lot of things have been copy-pasted.

[clang][docs] Add documentation for EH codegen (#176236)

This adds a document describing the implementation of LLVM IR generation
for exceptions and C++ cleanup handling. This will be used as a point of
reference for future CIR exception handling design work.

This document was generated using AI, with some manual modifications
afterwards.

[mlir][tensor] Fix return type for ExtractSlice canonicalizer (#178118)

The `OpWithOffsetSizesAndStridesConstantArgumentFolder` pattern for
tensor.extract_slice was incorrectly using
`inferCanonicalRankReducedResultType()` to compute the result type after
folding constant offsets. This function infers a canonical rank
reduction (dropping the first N unit dimensions), which breaks when the
original operation used a non-canonical rank reduction. This change is
similar to the existing correct behavior in
`SubViewReturnTypeCanonicalizer` for `memref.subview`.

For example, extracting `tensor<1x4xf16>` from `tensor<1x1x8x1xf16>` by
dropping dims 0 and 3 would incorrectly produce tensor<4x1xf16>
(canonical: drop dims 0 and 1).

---------

Signed-off-by: Ian Wood <ianwood at u.northwestern.edu>

Rebase

Created using spr 1.3.6-beta.1

[𝘀𝗽𝗿] changes introduced through rebase

Created using spr 1.3.6-beta.1

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Rebase

Created using spr 1.3.6-beta.1

[𝘀𝗽𝗿] changes introduced through rebase

Created using spr 1.3.6-beta.1

[skip ci]

Rebase

Created using spr 1.3.6-beta.1

[𝘀𝗽𝗿] changes introduced through rebase

Created using spr 1.3.6-beta.1

[skip ci]

[𝘀𝗽𝗿] changes introduced through rebase

Created using spr 1.3.6-beta.1

[skip ci]

Rebase

Created using spr 1.3.6-beta.1

Rebase

Created using spr 1.3.6-beta.1

[𝘀𝗽𝗿] changes introduced through rebase

Created using spr 1.3.6-beta.1

[skip ci]

Rebase

Created using spr 1.3.6-beta.1

[𝘀𝗽𝗿] changes introduced through rebase

Created using spr 1.3.6-beta.1

[skip ci]

Address review comments

Created using spr 1.3.6-beta.1

[CIR] Upstream ClearCacheOp support for __builtin___clear_cache (#178260)

Adds CIR `ClearCacheOp` and lowers `__builtin___clear_cache` through CIR
to the LLVM `llvm.clear_cache` intrinsic. Includes codegen + lowering
support and a test.

InstCombine: Handle multiple use copysign

Handle multiple use copysign in SimplifyDemandedFPClass

Address comments

InstCombine: Handle nsz in copysign SimplifyDemandedFPClass

If the only sign bit difference is for 0, fold through the source.

InstCombine: Add baseline tests for SimplifyDemandedFPClass copysign improvements

Prepare to support more folds and multiple uses.

One use check

[MLIR][Python] Remove partial LLVM APIs in python bindings (2/n) (#178529)

This PR continues work from #178290.
Cleaned up LLVM utilities in IRCore.cpp: `enumerate`, `zip`, `ArrayRef`,
`hash_value`.

[scudo] Add missing space to getStats (#178537)

[mlir][memref] Add non-atomic RMW option for emulated memref.store. (#178498)

The revision follows
https://github.com/llvm/llvm-project/commit/f0e1857c84186263ab3bd8b9420b54c8c5810136
to add an option for supporting non-atomic RMW emulation. The 0D case
uses non-atomic option unconditionally because it writes the entire
value.

Signed-off-by: hanhanW <hanhan0912 at gmail.com>

Fix formatting

Created using spr 1.3.7

Rebase, add identity/bswap loads support

Created using spr 1.3.7

[clang][lit] Disable spirv-tools-err.c on Windows (#178751)

Seems to fail when run from PowerShell, and we
[shouldn't](https://github.com/llvm/llvm-project/pull/173313) use
`REQUIRES: shell` anymore.

Signed-off-by: Nick Sarnie <nick.sarnie at intel.com>

[CIR] Add MemChrOp for __builtin_char_memchr and __builtin_memchr (#175234)

This PR adds support for the memchr builtin functions:

## Changes

- Define `CIR_MemChrOp` (`cir.libc.memchr`) operation in CIROps.td
- Add builtin handling for `__builtin_char_memchr` and
`__builtin_memchr` in CIRGenBuiltin.cpp
- Add LLVM lowering to call the `memchr` library function
- Add CodeGen and IR tests with CIR, LLVM, and OGCG checks

The operation searches for a pattern byte in a memory region and returns
a pointer to the first occurrence or null.

[clang][driver][darwin] Prefer DarwinSDKInfo for platform identification and compatibility over the -isysroot path (#176541)

Using the file system path to identify the SDK platform, and determine
which platforms the SDK supports, is unreliable. In particular, the
SDK's file name prefix is usually significant, and dropping it usually
gives incorrect results. Instead, use information from SDKinfo to
positively identify its platform/environment, and to identify which
triples are compatible.