automated verification of clobbers

[edef1c]

I'd like to have some form of automated verification that we're not unintentionally modifying processor state that we're not declaring as clobbered. Preferably, we would automatically generate a list of processor state from a third-party source (such as Capstone) and use this to generate our clobber lists.

Additionally, we could pattern-match the stack-swap code in real programs, and use this to statically check for state being carried across contexts.

[Amanieu]

A good start would be to look at the list of clobbers supported by clang for each architecture: https://github.com/llvm-mirror/clang/blob/master/lib/Basic/Targets.cpp (search for GCCRegNames)