[PATCH] D86203: [GlobalISel][TableGen] Add handling of unannotated dst pattern ops

[Matt Arsenault via Phabricator via llvm-commits]

arsenm added a comment.

In D86203#2445098 <https://reviews.llvm.org/D86203#2445098>, @bjope wrote:

> But if I understand this patch correctly it has tried to derive the type from "some_isnt" when it is omitted, rather than reusing the type from the source pattern. Would it make more sense to infer the type from the source pattern instead of from the target instruction when it is omitted? Is that possible?

The problem isn't the type, it's the register class. It can be ambiguous to go from the target instruction back to the source bank if the target register class supports multiple banks


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  https://reviews.llvm.org/D86203/new/

https://reviews.llvm.org/D86203