[PATCH] CodeGen: introduce support for Windows SSP on x86/x64

[Reid Kleckner]

I don't think calling llvm.read_register("esp/rsp") in LLVM IR is going to work. There's no guarantee that the results of those calls will be the same in the prologue and the epilogue due to dynamic allocas.

If we want to get the right SP, we need to get CodeGen so we can put the check at the right point in the epilogue, prologue, and tail call sequence.


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  rL LLVM

http://reviews.llvm.org/D6751

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