RTL definition

[Jim Wilson]

Fran Baena wrote:
> RTL represents a low-level language, machine-independent. But I didn't
> find any especification of such language represented. This is, I found
> no document where the language represented were described or defined
> in a grammar way.

RTL isn't a programming language, and hence has no grammar.  It is 
merely one of the internal representations that gcc uses for optimizing 
and generating code.  We do have gcc internals documentation that you 
have already been pointed at.

Jim