SSA renumber local names; local def-use chains; emit local dead registers annotations using Sudeep's EFLAGS arrays.

Add SMPFunction::FindAllocPoint method to find end of stack frame allocation when it is done by pushes, e.g. in strpbrk().

Provide SMPInstr methods to access uses and defs externally; add methods EmitAnnotations and MDUsesCalleeSavedReg.