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View of /sml/trunk/src/MLRISC/Doc/latex/backend-opt.tex

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Revision 651 - (download) (as text) (annotate)
Thu Jun 1 18:34:03 2000 UTC (19 years, 1 month ago) by monnier
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bring revisions from the vendor branch to the trunk
\section{Back End Optimizations}

  Once MLRisc trees have been generated, they are passed into a module
  that generates a flowgraph of target machine instructions. Again,
  this module and all subsequent optimization phases have been
  specialized to the front end.  
  \image{Back end optimizations}{pictures/png/optimization.png}{align=right} 
   Nearly all
  instruction selection modules provided by MLRISC use a simple tree
  pattern matching algorithm rather than the more heavy weight BURG
  tools --- including the x86 \begin{color}{#580000} It is important to
  emphasis that all optimizations are performed on the flowgraph of
  target machine instructions and \emph{not} MLRisc
  immediate IR. \end{color} There is complete flexibility in the order,
  and nature of the optimizations performed. 

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