Changes

[XCore][docs] Fix XCore compiler writer documentation links.

Fix links to XMOS website. Add link for XS2 architecture.

Reviewed By: jryans

Differential Revision: https://reviews.llvm.org/D92019

[lldb][import-std-module] Add a test for typedef'd std types

[SLP][X86] Extend PR46983 tests to include SSE2,SSE42,AVX512BW test coverage

Noticed while reviewing D92824

[clang][cli] Unify boolean marshalling

Use lambdas with captures to replace the redundant infrastructure for marshalling of two boolean flags that control the same keypath.

Reviewed By: dexonsmith

Differential Revision: https://reviews.llvm.org/D92773

Add rsqrt lowering from standard to NVVM

Differential Revision: https://reviews.llvm.org/D92838

[SVE] Fix crashes with inline assembly

All the crashes found compiling inline assembly are fixed in this
patch by changing AArch64TargetLowering::getRegForInlineAsmConstraint
to be more resilient to mismatched value and register types. For
example, it makes no sense to request a predicate register for
a nxv2i64 type and so on.

Tests have been added here:

  test/CodeGen/AArch64/inline-asm-constraints-bad-sve.ll

Differential Revision: https://reviews.llvm.org/D92554

[ARM] Remove dead instructions before creating VPT block bundles

We remove VPNOT instructions in VPT blocks as we create them, turning
them into else predicates. We don't remove the dead instructions until
after the block has been created though. Because the VPNOT will have
killed the vpr register it used, this makes finalizeBundle add internal
flags to the vpr uses of any instructions after the VPNOT. These
incorrect flags can then confuse what is alive and what is not, leading
to machine verifier problems.

This patch removes them earlier instead, before the bundle is finalized
so that kill flags remain valid.

Differential Revision: https://reviews.llvm.org/D92227

[MLIR][SPIRV] Add initial support for OpSpecConstantOp.

This commit adds initial support for SPIR-V OpSpecConstantOp
instruction. The following is introdcued:

- A new `spv.specConstantOperation` operation consisting of a single
region and of 2 operations within that regions (more details in the
docs of the op itself).
- A new `spv.yield` instruction that acts a terminator for
`spv.specConstantOperation`.

For now, the generic form of the new op is supported (i.e. no custom
parsing or printing). This will be done in a follow up patch.

Reviewed By: antiagainst

Differential Revision: https://reviews.llvm.org/D92232