//===-- README.txt - Notes for WebAssembly code gen -----------------------===//
This WebAssembly backend is presently in a very early stage of development.
The code should build and not break anything else, but don't expect a lot more
at this point.
For more information on WebAssembly itself, see the design documents:
* https://github.com/WebAssembly/design/blob/master/README.md
The following documents contain some information on the planned semantics and
binary encoding of WebAssembly itself:
* https://github.com/WebAssembly/design/blob/master/AstSemantics.md
* https://github.com/WebAssembly/design/blob/master/BinaryEncoding.md
Interesting work that remains to be done:
* Write a pass to restructurize irreducible control flow. This needs to be done
before register allocation to be efficient, because it may duplicate basic
blocks and WebAssembly performs register allocation at a whole-function
level. Note that LLVM's GPU code has such a pass, but it linearizes control
flow (e.g. both sides of branches execute and are masked) which is undesirable
for WebAssembly.
* Basic relooper to expose control flow as an AST.
* Figure out how to properly use MC for virtual ISAs. This may require some
refactoring of MC.
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