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This allows me to run tests on a system where the default
installed node is not recent enough.
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Previously the relooper would do some optimizations when deciding when to use an if vs a switch, how to group blocks, etc. This PR adds an additional pre-optimization phase with some basic but useful simplify-cfg style passes,
* Skip empty blocks when they have just one exit.
* Merge exiting branches when they are equivalent.
* Canonicalize block contents to make such comparisons more useful.
* Turn a trivial one-target switch into a simple branch.
This can help in noticeable ways when running the rereloop pass, e.g. on LLVM wasm backend output.
Also:
* Binaryen C API changes to the relooper, which now gets a Module for its constructor. It needs it for the optimizations, as it may construct new nodes.
* Many relooper-fuzzer improvements.
* Clean up HashType usage.
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Fixes #1649
This moves us to a single object for functions, which can be imported or nor, and likewise for globals (as a result, GetGlobals do not need to check if the global is imported or not, etc.). All imported things now inherit from Importable, which has the module and base of the import, and if they are set then it is an import.
For convenient iteration, there are a few helpers like
ModuleUtils::iterDefinedGlobals(wasm, [&](Global* global) {
.. use global ..
});
as often iteration only cares about imported or defined (non-imported) things.
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Remove executable bit and #! from scripts that don't have
entry point.
Add missing licence test.
Move arg parsing into a function.
Remove legacy --only_prepare (with underscrore) argument.
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flake8 starts warning on bare "except:" in python scripts, and all CI job is failing for that.
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* support switches in relooper and c api
* update relooper fuzzer for switches
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