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WebAssembly: add some TODO

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Reviewers: sunfish

Subscribers: llvm-commits, jfb

Differential Revision: http://reviews.llvm.org/D10971

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241513 91177308-0d34-0410-b5e6-96231b3b80d8
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JF Bastien 2015-07-06 21:41:59 +00:00
parent fa2ca74300
commit 610992baca
1 changed files with 11 additions and 0 deletions
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lib/Target/WebAssembly/README.txt
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@ -12,4 +12,15 @@ 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.
//===---------------------------------------------------------------------===//