Author: Vincent Diepeveen
Date: 06:29:40 12/23/02
Go up one level in this thread
On December 21, 2002 at 23:47:48, Robert Hyatt wrote: >On December 21, 2002 at 21:20:26, Vincent Diepeveen wrote: > >>On December 21, 2002 at 17:45:43, Matt Taylor wrote: >> >>>On December 21, 2002 at 17:29:11, Vincent Diepeveen wrote: >>> >>>>On December 21, 2002 at 14:32:18, Matt Taylor wrote: >>>> >>>>checkout the compiler faq at : >>>> >>>>http://www.cs.strath.ac.uk/~hl/classes/52.358/FAQ/passes.html >>>> >>>>[off topic nonsense removed] >>> >>>Ok, the FAQ explains to me principles which were self-evident. When you read the >>>FAQ, you realize that an optimizing single-pass C compiler is not possible. >>> >>>"Optimization: Only really possible with a multi-pass compiler" >>> >>>It also reaffirms what I'd already stated -- multi-pass compilers are EASIER to >>>write because the code is more modular and has less coupling. Just about the >>>only data structure that you're going to rely on to go between stages is the >>>AST, and that's not that difficult. >>> >>>This is quite familiar for me as I've been working on a compiler implementation >>>for a C-like language. (Actually it's more like C++, but it lacks multiple >>>inheritance and templates.) >>> >>>-Matt >> >>If you have 'so much' experience with compilers, whereas i consider myself >>a layman; i just wrote a few very very primitif compilers (and no assembly >>output of them even); i wonder why you do not know what 'single pass >>compiler' means. It has to do with how many times a compiler reads >>the source code. Not so much how many high level optimizations >>you apply to it. >> >>So now you learned again something. >> >>Best regards, >>Vincent. > >No... _you_ have learned _nothing_. You are using a totally twisted definition >of "single-pass". A pass is a pass over the program. Whether it be the source >code, the intermediate output from pass 1 as is gone over by pass 2. Etc. > >Please read something _first_. > >I _have_ written compilers. I _have_ taught a compiler course multiple times. Then you should know clearly that there is a big difference between the original compilers that perform simple tasks and the definitions when applied to todays high level languages.
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