[MLIR] Re-enable multithreaded compilation in MLIR

[erick-xanadu]

This is a trivial change. Instead of having a call to ctx.disableMultiThreading() call ctx.enableMultiThreading(). To close this ticket, we should also clean up the printing infrastructure. At the very least, CatalystIRPrinterConfig's definition should be deleted as it is no longer used. Please also delete the comment. The way printing is done has changed and the comment is outdated.

catalyst/mlir/lib/Driver/CompilerDriver.cpp

Lines 409 to 411 in c559403

	// TODO: FIXME:
	// Let's try to enable multithreading. Do not forget to protect the printing.
	ctx.disableMultithreading();

[josh146]

@erick-xanadu do you have more context here for this issue?

[erick-xanadu]

@josh146 there was originally an issue with the printing mechanism. Looking a little bit closer, it looks like the error is no longer there. If I remember correctly, the issue was with CatalystIRPrinterConfig but this struct is no longer used since October 13. So, I think this can be an easy fix / cleanup of code.

[josh146]

Thanks! do you mind updating the original comment in the issue with the full context?