Changes

[clangd][remote] Add flag to set idletimeout

By default gRPC has no idletimeout and some firewalls might drop idle
connections after a certain period. This results in idle clients
shouting into void until server resets the connection.

Differential Revision: https://reviews.llvm.org/D97536

[libcxxabi] Fewer assumptions about path from libcxx to libcxxabi

This is useful for projects that pull in libcxx and libcxxabi and build
them using out-of-tree build files, but don't make them sibling
directories (or don't call the sibling directories libcxx and libcxxabi
for some reason).

Fixes PR49313.

Differential Revision: https://reviews.llvm.org/D97379

[mlir] Silence some deprecation warnings after dffc487b07d9a50f8c65eccb9241f72af3486c79

[mlir][linalg] Allow TC ops taking an unused shaped operand.

If one operand is not used in the formula, it will be considered a
shaped operand. And the result of indexing map of the operand will be the first
reduction dims.

Depends On D97383

Reviewed By: nicolasvasilache

Differential Revision: https://reviews.llvm.org/D97384

[Utils] collectBitParts - bail for integers > 128-bits

collectBitParts uses int8_t for the bit indices, leaving a 128-bit limit.

We already test for this before calling collectBitParts, but rGb94c215592bd added truncate handling which meant we could end up processing wider integers.

Thanks to @manojgupta for the repro.

[mlir][linalg] Add pooling ops to Linalg TC ops.

- Add EDSC builders for std_cmpf_ogt and std_cmpf_olt.
- Add pooling_nhwc_min/max/sum ops

Depends On D97384

Reviewed By: nicolasvasilache

Differential Revision: https://reviews.llvm.org/D97385

[libc++] Remove the now unused macos-trunk and macos-backdeployment CI scripts

We use the run-buildbot script everywhere now.

[ADT][NFC] Add extra typedefs to `ArrayRef` and `MutableArrayRef`

* `value_type`
* `pointer`
* `const_pointer`
* `reference`
* `const_reference`
* `const_reverse_iterator`
* `size_type`
* `difference_type`

It makes `ArrayRef` and `MutableArrayRef` types fully compliant with STL Container concept.

Reviewed By: lattner, courbet

Differential Revision: https://reviews.llvm.org/D95611

[lldb] Add deref support to libc++ unique_ptr synthetic

Add frame variable dereference suppport to libc++ `std::unique_ptr`.

This change allows for commands like `v *thing_up` and `v thing_up->m_id`. These commands now work the same way they would with raw pointers, and as they would with expression. This is done by adding an unaccounted for child member named `$$dereference$$`.

Without this change, the command would have to be written as `v *thing_up.__value_` or v thing_up.__value_->m_id` which exposes internal structure and is more clumsy to type.

Additionally, the existing tests were updated. See also https://reviews.llvm.org/D97165 which added deref support for `std::shared_ptr`.

Differential Revision: https://reviews.llvm.org/D97524

[llvm][utils] Support dereferencing llvm::Optional lldb formatter

Add deref support to `llvm::Optional` in `lldbDataFormatters.py`.

This creates a synthetic provider that adds dereference support, but otherwise proxies all access to the underlying value.

With this change, an optional value can be displayed by running `v *someOptional`, and its contents can be accessed with the arrow `operator->`, for example `v someOpt->HasThing`. This matches expressions usable from expression evaluation.

See also D97165 and D97524.

Differential Revision: https://reviews.llvm.org/D97525

[llvm][utils] Rename lldb dict variables to internal_dict

Most lldb scripts use `internal_dict`. Also, `dict` is a builtin constructor,
it's good habit to avoid using it as a variable name.

[AMDGPU] Better codegen for i64 bitreverse

Differential Revision: https://reviews.llvm.org/D97547

Fix assert to use getTypeStoreSize instead of getPrimitiveSizeInBits,
per comment on D97223.

[llvm][utils] Fix innocuous off by one in lldb formatters

num_children is "last_index" + 1, thus
    num_children + 1 = "last_index" + 2

this worked anyway because the index of `$$dereference$$` would work as long as
it was past the last index.