Support delegate instruction and update other exception instructions
#223
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The spec now specifies that `catch_all` has a separate opcode from `else`.
The end of an unwind should check that the block was empty, but it needs to push the try block type as the result.
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Thanks! And yeah a submodule update would be great! That can be tricky sometimes though so let me know if there's any trouble |
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This PR adds support for the
delegateinstruction that's part of the exception handling proposal. It was previously left out because it didn't have an opcode assignment, but the latest spec explainer (WebAssembly/exception-handling#137 (comment)) includes it.It also updates/fixes support for other instructions to match recent spec updates. For example,
catch_allis no longer sharing an opcode withelse.With these patches, exception support should also match the behavior in wabt's tests (when including these pending PRs: WebAssembly/wabt#1608 and WebAssembly/wabt#1605). I can submit a PR later to enable exception handling tests that are currently disabled once wabt PRs are merged and the submodule can be updated.