We created a new compiler front end that allowed LLVM to
understand ActionScript 3 and used its existing ARM back end to
output native ARM assembly code. We call this Ahead of Time (AOT)
compilation—in contrast to the way Adobe Flash Player and Adobe
AIR function on the desktop using Just in Time (JIT) compilation.
Since we are able to compile ActionScript to ARM ahead of time,
the application gets all the performance benefits that the JIT
would offer and the license compliance of not requiring a runtime
in the final application.