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Introduced Int.iwordsize and used it in place of "Int.repr 32" or
"Int.repr (Z_of_nat wordsize)".



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  #pragma use_section.
Some clean-ups in Cil2Csyntax.
Separate mach-dep parts of extraction/extraction.v into
   <arch>/extractionMachdep.v


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Remove "-ccopt -g" options: not really useful and causing problems with flexdll in the Win32/mingw port of Caml.


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  nodes a la Appel and George.
Maps: in PTree.combine, compress useless subtrees.
Lattice: more efficient implementation of LPMap.
Makefile: build profiling version


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all x used as destination of a call [x = f(args)].  This wasn't true before
if x was a global C#minor variable.


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Refactoring of Constprop and Constpropproof into a machine-dependent part and a machine-independent part.



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Refactored Selection.v and Selectionproof.v into a machine-dependent part + a machine-independent part.


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Kildall: simplified the interface
Constprop, CSE, Allocation, Linearize: updated for the new Kildall
RTL, LTL: removed the well-formedness condition on the CFG, 
  it is no longer necessary with the new Kildall and it is problematic
  for validated optimizations.
Maps: more efficient implementation of PTree.fold.


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and reactive divergence.  As a consequence:
- Removed the Enilinf constructor from traceinf (values of traceinf
  type are always infinite traces).
- Traces are now uniquely defined.
- Adapted proofs big step -> small step for Clight and Cminor accordingly.
- Strengthened results in driver/Complements accordingly.
- Added common/Determinism to collect generic results about
  deterministic semantics.


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