[llvm] Cleanup header dependencies in ADT and Support

The cleanup was manual, but assisted by "include-what-you-use". It consists in

1. Removing unused forward declaration. No impact expected.
2. R

[llvm] Cleanup header dependencies in ADT and Support

The cleanup was manual, but assisted by "include-what-you-use". It consists in

1. Removing unused forward declaration. No impact expected.
2. Removing unused headers in .cpp files. No impact expected.
3. Removing unused headers in .h files. This removes implicit dependencies and
is generally considered a good thing, but this may break downstream builds.
I've updated llvm, clang, lld, lldb and mlir deps, and included a list of the
modification in the second part of the commit.
4. Replacing header inclusion by forward declaration. This has the same impact
as 3.

Notable changes:

- llvm/Support/TargetParser.h no longer includes llvm/Support/AArch64TargetParser.h nor llvm/Support/ARMTargetParser.h
- llvm/Support/TypeSize.h no longer includes llvm/Support/WithColor.h
- llvm/Support/YAMLTraits.h no longer includes llvm/Support/Regex.h
- llvm/ADT/SmallVector.h no longer includes llvm/Support/MemAlloc.h nor llvm/Support/ErrorHandling.h

You may need to add some of these headers in your compilation units, if needs be.

As an hint to the impact of the cleanup, running

clang++ -E -Iinclude -I../llvm/include ../llvm/lib/Support/*.cpp -std=c++14 -fno-rtti -fno-exceptions | wc -l

before: 8000919 lines
after: 7917500 lines

Reduced dependencies also helps incremental rebuilds and is more ccache
friendly, something not shown by the above metric :-)

Discourse thread on the topic: https://llvm.discourse.group/t/include-what-you-use-include-cleanup/5831

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[mlir][ods] AttrOrTypeGen uses Class

AttrOrType def generator uses `Class` code gen helper,
instead of naked raw_ostream.

Depends on D113714 and D114807

Reviewed By: rriddle

Differential Revision

[mlir][ods] AttrOrTypeGen uses Class

AttrOrType def generator uses `Class` code gen helper,
instead of naked raw_ostream.

Depends on D113714 and D114807

Reviewed By: rriddle

Differential Revision: https://reviews.llvm.org/D113715

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[drr] Enable specifying range in NativeCodeCall replacement.

This enables creating a replacement rule where range of positional replacements
need not be spelled out, or are not known (e.g., enable h

[drr] Enable specifying range in NativeCodeCall replacement.

This enables creating a replacement rule where range of positional replacements
need not be spelled out, or are not known (e.g., enable having a rewrite that
forward all operands to a call generically).

Differential Revision: https://reviews.llvm.org/D104955

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[mlir][ODS] Get rid of limitations in rewriters generator

Do not limit the number of arguments in rewriter pattern.

Introduce separate `FmtStrVecObject` class to handle
format of variadic `std::str

[mlir][ODS] Get rid of limitations in rewriters generator

Do not limit the number of arguments in rewriter pattern.

Introduce separate `FmtStrVecObject` class to handle
format of variadic `std::string` array.

Reviewed By: mehdi_amini

Differential Revision: https://reviews.llvm.org/D97839

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Import llvm::StringSwitch into mlir namespace.

Reviewed By: rriddle

Differential Revision: https://reviews.llvm.org/D88971

[MLIR][NFC] Remove tblgen:: prefix in TableGen/*.cpp files

- Add "using namespace mlir::tblgen" in several of the TableGen/*.cpp files and
eliminate the tblgen::prefix to reduce code clutter.

Dif

[MLIR][NFC] Remove tblgen:: prefix in TableGen/*.cpp files

- Add "using namespace mlir::tblgen" in several of the TableGen/*.cpp files and
eliminate the tblgen::prefix to reduce code clutter.

Differential Revision: https://reviews.llvm.org/D85800

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Mass update the MLIR license header to mention "Part of the LLVM project"

This is an artifact from merging MLIR into LLVM, the file headers are
now aligned with the rest of the project.

Adjust License.txt file to use the LLVM license

PiperOrigin-RevId: 286906740

NFC: Add a missing include for std::isalnum and std::digit.

--

PiperOrigin-RevId: 250085298

[TableGen] Better support for predicate and rewrite rule specification

Currently predicates are written with positional placeholders `{N}` and rely on
`formatv` as the engine to do substitut

[TableGen] Better support for predicate and rewrite rule specification

Currently predicates are written with positional placeholders `{N}` and rely on
`formatv` as the engine to do substitution. The problem with this approach is that
the definitions of those positional placeholders are not consistent; they are
entirely up to the defining predicate of question. For example, `{0}` in various
attribute constraints is used to mean the attribute, while it is used to main the
builder for certain attribute transformations. This can become very confusing.

This CL introduces `tgfmt` as a new mechanism to better support for predicate and
rewrite rule specification. Instead of entirely relying on positional placeholders,
`tgfmt` support both positional and special placeholders. The former is used for
DAG operands. The latter, including $_builder, $_op, $_self, are used as special
"hooks" to entities in the context. With this, the predicate and rewrite rules
specification can be more consistent is more readable.

--

PiperOrigin-RevId: 243249671

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