Contributing to WebAssembly

Also, please be sure to read the README.md for this repository.

Adding support for new instructions

Use this handy checklist to make sure your new instructions are fully supported:

[ ] Instruction class or opcode added to src/wasm.h
[ ] Instruction class added to src/wasm-builder.h
[ ] Instruction class added to src/wasm-traversal.h
[ ] Validation added to src/wasm/wasm-validator.cpp
[ ] Interpretation added to src/wasm-interpreter.h
[ ] Effects handled in src/ir/effects.h
[ ] Precomputing handled in src/passes/Precompute.cpp
[ ] Hashing and comparing in src/ir/ExpressionAnalyzer.cpp
[ ] Parsing added in scripts/gen-s-parser.py, src/wasm-s-parser.h and src/wasm/wasm-s-parser.cpp
[ ] Printing added in src/passes/Print.cpp
[ ] Decoding added in src/wasm-binary.h and src/wasm/wasm-binary.cpp
[ ] Binary writing added in src/wasm-stack.h and src/wasm/wasm-stack.cpp
[ ] Support added in various classes inheriting OverriddenVisitor (and possibly other non-OverriddenVisitor classes as necessary)
[ ] Support added to src/tools/fuzzing.h
[ ] C API support added in src/binaryen-c.h and src/binaryen-c.cpp
[ ] JS API support added in src/js/binaryen.js-post.js
[ ] C API tested in test/example/c-api-kitchen-sink.c
[ ] JS API tested in test/binaryen.js/kitchen-sink.js
[ ] Tests added in test/spec
[ ] Tests added in top-level test/