[PATCH] Add Forward-Edge Control-Flow Integrity support

[Tom Roeder]

I just realized that there are two independent concerns here, and I'd like to separate them.

The first is the core implementation of CFI; there are some remaining comments to address, and then I'd like to be able to commit that part with x86 backend support.

The second is the comments and questions about ARM performance of jumptables and the exact details of the instructions needed to implement ARM backend support. I'm currently looking into this, based on the comments and questions from JF, and I will continue doing that. But I'd like to not block the core CFI work and the x86 backend on those questions.

Are the reviewers amenable to me splitting this into two pieces: one that deals with CFI and the x86 backend code, and one that deals with ARM?

http://reviews.llvm.org/D4167