SSA implementation

[Mark Mitchell]

>>>>> "Geoff" == Geoff Keating <geoffk@cygnus.com> writes:

    Geoff> It does turn the code into SSA form.  That's close to
    Geoff> everything we want it to do.  In the future there will be
    Geoff> other things done while the code is in SSA form, but they
    Geoff> will be separate passes.

We will be contributing a dead-code elimination pass in the very near
future that operates on the SSA form.  One big improvement is that
this algorithm is a) very fast and b) can eliminate loops in things
like:

  void f () { 
    int i;
    for (i = 0; i < 100; ++i)
      ;
  }

Jeffrey Oldham has a mostly working implementation of this algorithm.

--
Mark Mitchell                   mark@codesourcery.com
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