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Is there single AST representation in GCC


Hello,

I want to know that is GCC use different AST
representation for different languages. If no, then
what is the need for AST. Why cann't GCC directly
built RTL representation.

My second doubt is that what are the advantages of RTL
over Three address code.

Thanks in advance.

Nitin

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Nitin Jain,                       
H-8 ,Room No: 24
I.I.T.Bombay, Powai, Mumbai.
Mail-id: nitin-mbm@yahoo.com 
         nitinj@cse.iitb.ac.in
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