Is there an alternative to InstBuilder::fallthrough_return(...)

[ptitSeb]

InstBuilder::fallthrough_return(...) as been removed. What could be the alternative to it in current Codegen?

[bjorn3]

There isn't any alternative right now. It existed only for the purpose of an integration with Spidermonkey (Baldrdash), which required Spidermonkey to create the function prologue and epilogue. fallthrough_return only worked with the Baldrdash calling convention AFAIK. Baldrdash has since been removed from Spidermonkey and in response the Cranelift side of the integration has been removed too in #4571.

[bjorn3]

Could you tell a bit about the use case you have? Maybe there is an alternative? Or if not this could help with coming up with a design that isn't Spidermonkey specific.

[ptitSeb]

I don't think we are actually using this. But ReturnMode::FallthroughReturn still exist, so it was in a match arm.

[bjorn3]

I can't find it anywhere in the Cranelift source.

[ptitSeb]

Oh, yeah, you are right, sorry. I mixed up different code origins. I'll close the issue.