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   6 <TITLE>The SUIF Version 1 Library - Variable Symbols</TITLE>
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  17 <H2><A NAME="SEC55" HREF="suif1_toc.html#TOC55">Variable Symbols</A></H2>
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  25 In SUIF, variable symbols represent data objects.  Variable symbols
  26 are represented by objects of the <CODE>var_sym</CODE> class.  This class
  27 adds a field to specify the type of the variable as well as some
  28 additional flags.  Unlike procedures and labels, variables may be
  29 defined in any scope.
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  33 SUIF provides optional <STRONG>sub-variables</STRONG> to make it easier to deal
  34 with pieces of aggregate objects that may or may not overlap, in
  35 particular Fortran equivalences and reshaped common blocks.  Instead of
  36 referring to a piece of an aggregate by an offset combined with the
  37 aggregate symbol, a sub-variable can be created to represent the data at
  38 a particular offset within the aggregate, so that it can be referenced
  39 in the same way as if it were not contained within an aggregate
  40 structure.
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  43
  44 <UL>
  45 <LI><A HREF="suif1_56.html#SEC56">Variable Features</A>: Basic features of variables.
  46 <LI><A HREF="suif1_57.html#SEC57">Sub-Variables</A>: Variables contained within aggregates.
  47 <LI><A HREF="suif1_58.html#SEC58">Variable Definitions</A>: Definitions of global and static variables.
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