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When printing Binaryen IR, we previously generated names for unnamed heap types
based on their structure. This was useful for seeing the structure of simple
types at a glance without having to separately go look up their definitions, but
it also had two problems:
1. The same name could be generated for multiple types. The generated names did
not take into account rec group structure or finality, so types that differed
only in these properties would have the same name. Also, generated type names
were limited in length, so very large types that shared only some structure
could also end up with the same names. Using the same name for multiple types
produces incorrect and unparsable output.
2. The generated names were not useful beyond the most trivial examples. Even
with length limits, names for nontrivial types were extremely long and visually
noisy, which made reading disassembled real-world code more challenging.
Fix these problems by emitting simple indexed names for unnamed heap types
instead. This regresses readability for very simple examples, but the trade off
is worth it.
This change also reduces the number of type printing systems we have by one.
Previously we had the system in Print.cpp, but we had another, more general and
extensible system in wasm-type-printing.h and wasm-type.cpp as well. Remove the
old type printing system from Print.cpp and replace it with a much smaller use
of the new system. This requires significant refactoring of Print.cpp so that
PrintExpressionContents object now holds a reference to a parent
PrintSExpression object that holds the type name state.
This diff is very large because almost every test output changed slightly. To
minimize the diff and ease review, change the type printer in wasm-type.cpp to
behave the same as the old type printer in Print.cpp except for the differences
in name generation. These changes will be reverted in much smaller PRs in the
future to generally improve how types are printed.
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Updates the JS API `Function` wrapper introduced in #3115 with bindings for more C API functions. Also adds additional comments to describe the inner workings of wrappers in more detail.
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Function signatures were previously redundantly stored on Function
objects as well as on FunctionType objects. These two signature
representations had to always be kept in sync, which was error-prone
and needlessly complex. This PR takes advantage of the new ability of
Type to represent multiple value types by consolidating function
signatures as a pair of Types (params and results) stored on the
Function object.
Since there are no longer module-global named function types,
significant changes had to be made to the printing and emitting of
function types, as well as their parsing and manipulation in various
passes.
The C and JS APIs and their tests also had to be updated to remove
named function types.
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Adds the ability to create multivalue types from vectors of concrete value
types. All types are transparently interned, so their representation is still a
single uint32_t. Types can be extracted into vectors of their component parts,
and all the single value types expand into vectors containing themselves.
Multivalue types are not yet used in the IR, but their creation and inspection
functionality is exposed and tested in the C and JS APIs.
Also makes common type predicates methods of Type and improves the ergonomics of
type printing.
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- Print `globals` array in the tracing mode like other arrays
(`functions`, `exports`, `imports`, ...)
- Add accessor functions for globals
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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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We can remove the memory/table (itself, or an import if imported) if they are not used. This is pretty minor on a large wasm file, but when reading small wasts it's very noticeable to have an unused memory and table all the time.
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* binaryen.js and wasm.js don't need filesystem support
* newest emscripten no longer uses Runtime.*
* build fixes for binaryen.js and wasm.js also move binaryen.js to use standard emscripten MODULARIZE
* run binaryen.js in all possible engines ; update js builds
* don't emit debug build to a different name, just emit binaryen.js. makes testing easier and safer
* remove volatile things from binaryen.js info printing in tests
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* Also other function utilities in C and JS APIs
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