Remove HMF from IL_Throw/IL_ThrowExact/IL_Rethrow

[filipnavara]

Seems like reusing the SoftwareExceptionFrame from FEATURE_EH_FUNCLETS is quite a minimal change.

Contributes to #95695

[am11]

Once #113576 is completed and FEATURE_EH_FUNCLETS is enabled everywhere (incl. x86), would we be able to delete all #ifdef !FEATURE_EH_FUNCLETS branches? If so, would be nice to aim for it for .NET 10 (if possible).

[filipnavara]

would we be able to delete all #ifdef !FEATURE_EH_FUNCLETS branches?

Yes, already have a branch with the cleanups ready...

If so, would be nice to aim for it for .NET 10 (if possible).

I don't think there's much that I can do at the moment. It needs to be validated against the non-public diagnostic/debugger tests.

[filipnavara]

@jkotas @janvorli Thoughts?

[jkotas]

Is the idea that this may allow us to delete the HMF infrastructure before we get a chance to turn pn FEATURE_EH_FUNCLETS for x86?

[filipnavara]

Is the idea that this may allow us to delete the HMF infrastructure before we get a chance to turn pn FEATURE_EH_FUNCLETS for x86?

Yep.

[jkotas]

Ok, we can give this a shot