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Superoptimizer for WebAssembly

Intro to superoptimization

Given a C program compiled to Wasm, SLUMPs superoptimizer generates a new Wasm program which is smaller in size, and potentially faster, as we show in the image below.

pass

See paper Superoptimization of WebAssembly Bytecode (doi:10.1145/3397537.3397567)

Execute

superopt.sh <program.c> 4 #Enumerative synthesis

To use a docker container

docker run -it --rm --entrypoint=/bin/bash -v $(pwd):/inputs slumps/superoptimizer:latest #CEGIS

# inside the docker container
bash pipeline.sh /inputs/<input_file.c> 4 #enumerative synthesis

Build

dependency

For Ubuntu 18.04, we use apt to install dependencies:

apt install git subversion cmake gcc-multilib g++-multilib clang llvm-8 re2c z3

slumps

git clone https://github.com/KTH/slumps.git
cd slumps
git submodule update --init

souper

Dependencies

  • subversion (svn)
  • re2c
  • make
  • doxygen
  • dot (optional)
cd souper
./build_deps.sh
mkdir build && cd build
cmake ..
make
cd ../..

wabt

cd wabt
git submodule update --init
mkdir build && cd build
cmake ..
cmake --build .
cd ../..

Requirements

  • Python >= 3.6
  • LLVM >= 8.0
  • Build souper
  • export ROOT variable with the absolute path to slumps project. For example export ROOT=/Users/javierca/Documents/Develop/slumps