1b232fa0e9
Adds an option to `mlir-tblgen -gen-op-defs` `op-shard-count=N` that
divides the
op class definitions and op list into N segments, e.g.
```
// mlir-tblgen -gen-op-defs -op-shard-count=2
void FooDialect::initialize() {
addOperations<
>();
addOperations<
>();
}
```
When split across multiple source files, this can help significantly
improve
dialect compile time for dialects with a large opset.