This one seems really bizarre, so I wouldn’t be surprised if the answer is just :person_shrugging:, but I’ve started getting an intermittent build failure in the Swift bindings since I updated MLIR last. I’m betting this is a Swift bug (and I filed a ticket here ), but figured it couldn’t hurt to ask…

That is really bizarre - no ideas from me.

I haven’t diagnosed the root issue, but removing any reference to MlirDialectRegistrationHooks seems to have reliably fixed the issue. I’ve added a slightly-nasty workaround in MLIRSwift to accomplish this. My best guess is that clang uses some kind of hashing scheme to determine when two types defi…

I’ve done some more digging and here is my completely uneducated guess (emphasis on “completely”, “uneducated” and “guess”) as to what is going on: If you have two clang modules, ModuleA and ModuleB, they might reference the same type SameStruct defined in some header file. In order for these two m…

I don’t love not really understanding the root cause, but glancing at the patch, it seems reasonable either way. Afk, but will review in detail tmw. (Also, sorry something that should have been simple was so costly – super annoying)

Yeah, to be clear I think we should evaluate the patch outside of the context of this issue. And no worries, I’m pretty sure dealing with seemingly innocuous things that end up causing outsized problems is what we do for a living :slight_smile:

Strange Swift issues with Dialect Registration Hooks

MLIR

mehdi_amini February 6, 2021, 12:50am 3

Sorry no suggestion to help: that looks like an issue with the Swift importer to me…

Topic		Replies	Views
Swift and MLIR MLIR	24	2865	May 1, 2021
Dialects and the C API MLIR	16	1478	January 10, 2021
[RFC] In-tree Swift Bindings MLIR	27	2009	July 15, 2022
Modeling LLVM IR Struct Types MLIR	9	2985	September 28, 2020
[RFC] Dialect::registerDependentDialects MLIR	30	1541	November 9, 2021

Strange Swift issues with Dialect Registration Hooks

Related topics