This reverts commit dbe9f0914fcfd8444fd9656821af0f1a34a27e7a.
The flang-x86_64-windows buildbot has been failing since this has been merged:
* https://lab.llvm.org/buildbot/#/builders/172/builds/9124
Similar failure was reported by the pre-commit CI.
Add support for extensible dialects, which are dialects that can be
extended at runtime with new operations and types.
These operations and types cannot at the moment implement traits
or interfaces.
Differential Revision: https://reviews.llvm.org/D104554
The majority of dialects reimplement the same boilerplate over and over,
switching the default makes it for better discoverability and make it simpler
to implement new dialects.
Differential Revision: https://reviews.llvm.org/D117524
The new form of printing attribute in the declarative assembly is eliding the `#dialect.mnemonic` prefix to only keep the `<....>` part.
Differential Revision: https://reviews.llvm.org/D113873
