[PATCH] Protection against stack-based memory corruption errors using SafeStack

[Kostya Serebryany]

I am curious why you are doing transformations in CodeGen as opposed to LLVM IR?

Note that AddressSanitizer has similar transformation done as an LLVM IR pass (i.e. 'opt', not 'llc')
which makes testing much simpler (IMHO) and not x86-dependent. 
See FunctionStackPoisoner::poisonStack in lib/Transforms/Instrumentation/AddressSanitizer.cpp

http://reviews.llvm.org/D6094