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* Add interpreter support for exnref values.
* Fix optimization passes to support try_table.
* Enable the interpreter (but not in V8, see code) on exceptions.
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This renames all existing EH lit tests with filenames `*eh*` to
`*eh-old*`. This is a prep work so that we can add tests for the new EH
spec using `*eh*`. The reason I'm trying to split old and new EH test
files is we don't support fuzzing for the new EH yet and I wouldn't want
to exclude old EH tests from fuzzing too because of that.
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We previously supported a non-standard `(func "name" ...` syntax for declaring
functions exported with the quoted name. Since that is not part of the standard
text format, drop support for it, replacing it with the standard `(func $name
(export "name") ...` syntax instead.
Also replace our other usage of the quoted form in our text output, which was
where we quoted names containing characters that are not allowed to appear in
standard names. To handle that case, adjust our output from `"$name"` to
`$"name"`, which is the standards-track way of supporting such names. Also fix
how we detect non-standard name characters to match the spec.
Update the lit test output generation script to account for these changes,
including by making the `$` prefix on names mandatory. This causes the script to
stop interpreting declarative element segments with the `(elem declare ...`
syntax as being named "declare", so prevent our generated output from regressing
by counting "declare" as a name in the script.
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When a wasm exception is thrown and uncaught in the interpreter, it
caused the whole interpreter to crash, rather than gracefully reporting
it. This fixes the problem, and also compares whether an uncaught
exception happened when comparing the results before and after
optimizations in `--fuzz-exec`. To do that, when `--fuzz-exec` is given,
we now compare results even when the function does not have return
values. Logs for some existing test have changed because of this.
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