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Now that fastcomp has been removed from Emscripten, there is no need
for the asm2wasm tool which it used to compile fastcomp's asm.js output
to wasm.
See emscripten-core/emscripten#11860
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`BinaryIndexes` was only used in two places (Print.cpp and
wasm-binary.h), so it didn't seem to be a great fit for
module-utils.h. This change moves it to wasm-binary.h and removes its
usage in Print.cpp. This means that function indexes are no longer
printed, but those were of limited utility and were the source of
annoying noise when updating tests, anyway.
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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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Automated renaming according to
https://github.com/WebAssembly/spec/issues/884#issuecomment-426433329.
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fixes kripken/emscripten#1718
The way fastcomp emits compareExchange is a little odd, we just need to ignore the shift.
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That is the correct order in the text format, wabt errors otherwise.
See AssemblyScript/assemblyscript#310
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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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Following WebAssembly/threads#58
e.g. (memory $0 23 256 shared) is now (memory $0 (shared 23 256))
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* translate asm.js atomics into wasm atomics
* fix wasm-builder atomic load emitting, the alignment is the loaded size, not the output size
* don't require code for each node type in vaccuum, for non-mentioned nodes, assume we can't optimize them out
* support atomics in hashing, comparing, and copying
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