From: pronesto@gmail.com   
      
   Usually we do not see many virtuals with different sizes. I have some   
   numbers in here:   
      
   http://www2.dcc.ufmg.br/laboratorios/llp/wiki/doku.php?id=benchmarkpzanalysis   
      
   This page above talks about register allocation by puzzle solving,   
   i.e, we use this abstraction called puzzles:   
      
   http://compilers.cs.ucla.edu/fernando/projects/puzzles/tutorial/   
      
   If a puzzle has pieces of different sizes, then it means that you are   
   using virtuals of different sizes, i.e, 32 and 64-bit floating point   
   values, for instance. But most of the floating point benchmarks that I   
   know are too homogeneous: either all the pieces are 32-bits, or 64-   
   bits.   
      
   best,   
      
   Fernando   
      
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