[PATCH] D80778: [SelectionDAGBuilder][WebAssembly] Omit range checks on jump tables

[Hans Wennborg via Phabricator via llvm-commits]

hans added a comment.

Before digging into the code, would it be impractical to fold the range check into the br_table instruction in the wasm backend instead, "sniffing out the guard" and replacing it as suggested by that comment in WebAssemblyISelLowering.cpp?

Because I'm a little bit worried about this ipushing complexity up to the general switch lowering mechanism, for example breaking the invariant that jump tables have a size that matches their corresponding case range.


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https://reviews.llvm.org/D80778