binaryen

binaryen copied to clipboard

Avoid hosting allocations (especially array allocations) out of conditional paths

2

We have for example this Dart code ```dart const _codeUnitsCacheSize = 512; final _codeUnitsCache = WasmArray(_codeUnitsCacheSize); JSStringImpl _jsStringFromAsciiBytes(U8List source, int start, int end) { final length = end - start;...

mkustermann

NaN flip a sign bit on ARM(el)

1

As can be seen [in this build log](https://buildd.debian.org/status/fetch.php?pkg=binaryen&arch=armel&ver=122-3&stamp=1738986751&raw=0) -[LoggingExternalInterface logging nan:0x7fff82] +[LoggingExternalInterface logging -nan:0x7fff82] [The best I could find about this](https://github.com/dart-lang/sdk/issues/49423#issuecomment-1178979421).

kapouer

Lower WASM exceptions to MVP (or maybe GC)

4

Many C++ libraries require exceptions, like [`libriscv`](https://github.com/libriscv/libriscv) and Binaryen itself. Compiling them to WASI would work (as `wasi-sdk`, iirc, supports WASM exceptions), but some WASM parsers (like [my fork of...

gkgoat1

``` BinaryenAddFunctionImport(module, internalName, "env", "externalBaseName", params, result); BinaryenFunctionRef func = BinaryenGetFunction(module, ret); func->setExplicitName(internalName); ``` i think add and Get , It's a bit wasteful. why not return BinaryenFunctionRef on BinaryenAddFunctionImport?...

primstar-cool

How to get a call stack when wasm-ctor-eval stops?

6

Hello, Apologies if this is already documented somewhere, but I was unable to find it. I'm trying to find out how I can easily find _where_ a particular call to...

rdb

wasm-opt: Optimize out store of load with traps-never-happen

4

Such WebAssembly code snippet will not be optimized by `wasm-opt` ```wasm (local $var i32) ... local.tee $var local.get $var i32.load i32.store ``` However, this equals ```c *var = *var ```...

Anonymity20202

Memory packing is not safe with imported memory

1

The MemoryPacking pass assumes that the initial memory is zero, so it is free to remove spans of zeroes from active segments. This is not technically true with an imported...

tlively

Is it possible avoid c++ exeptions?

33

I mean build binaryen with emscripten with "-fno-exceptions" for asmjs / wasm. But I guess other build targets without exceptions will be also benefits for it's size. As I know...

MaxGraey

Silence some error output in the presence of multi-step commands

2

I am calling `wasm-merge`, `wasm-metadce`, and `wasm-opt` in sequence and the output of the first two steps both errors with "Some VMs may not accept this binary because it has...

rickyvetter

Use wasm customSections, to fix Binaryen WASM to text format round tripping failing for side module

2

I have been investigating building a dynarec for an emulator using dynamic linking. The hope was that i could manually modify WASM text and compile the side module using binaryen.js...

kevodwyer