Add fast-path for memset, memcpy, and memmove#33
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The additional "calls" to __klee_handle_mem* are intercepted by the klee SpecialFunctionHandler and implement the intended functionality directly in concrete cases.
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The additional "calls" to
__klee_handle_mem{set|cpy|move}are intercepted by the kleeSpecialFunctionHandlerand implement the intended functionality directly inconcrete cases. The associated PR in klee is at klee/klee#1341 which needs to go in before this gets merged.