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Improve error messages when parsing an incorrect type. Before: ``` invalid kind of type specified ``` After: ``` invalid kind of type specified: expected builtin.tensor, but found 'tensor<*xi32>' ``` This error message is produced when a certain operand/result type is expected according to an op's TableGen definition, but a different type is parsed. Type constraints (which may have nice error messages) are checked after parsing a type. If an incorrect type is parsed, we never get to the point of printing type constraint error messages. This may discourage users from specifying C++ classes with type constraints. (Explicitly specifying C++ classes is beneficial because the auto-generated C++ code will have richer type information; explicit casts are unnecessary, etc.) See #134981 for an example where specifying additional type information with type constraints (e.g., `LLVM_AnyVector`) lead to worse error messages. Note: In order to generate a better error message, the parser must retrieve a type's name from the C++ class. TableGen-generated type classes always have a `name` field, but hand-written C++ type classes may not. The `HasStaticName` template was copied from `DialectImplementation.h` (`HasStaticDialectName`).
Multi-Level Intermediate Representation
See https://mlir.llvm.org/ for more information.