Intermediate Representation

simon_google@mookstar.co.uk (Simon)
10 Oct 2001 15:51:45 -0400

          From comp.compilers
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From: simon_google@mookstar.co.uk (Simon)
Newsgroups: comp.compilers
Date: 10 Oct 2001 15:51:45 -0400
Organization: http://groups.google.com/
Keywords: design, analysis
Posted-Date: 10 Oct 2001 15:51:45 EDT

Hi,


I'm not really a compiler man myself, but am trying to understand how
certain things would be represented at the intermediate representation
stage. Could someone please explain to me how a simple loop would be
represented in a [generic] intermediate representation, perhaps
demonstrating the two examples below. Is there infact a difference in
the way the two would be represented at this stage of the compiling
process due to the dependance within the loop?


// Example 1 - No Dependance on Loop Counter


int a = 0;
for(i=0; i<10; i++)
{
      a = a + 3;
}


// Example 2 - Uses Loop Counter Value


int a = 0;
for(i=0; i<10; i++)
{
      a = a + i;
}


Any references to good explanations available on the web would also be
very useful. Are there any nice [free!] front-end tools about that
will produce a clear and readable intermediate code so I can
experiment?


Thanks for your time,


Simon ;o)

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