---- Original Message ----
> From: Micha Nelissen <mi...@neli.hopto.org>
> To: FPC developers' list <fpc-devel@lists.freepascal.org>
> Sent: Mon, November 16, 2009 12:03:27 PM
> Subject: Re: [fpc-devel] Source Code Optimization
>
> Dariusz Mazur wrote:
> > Maybe it is something interesting
> >
> >
> http://www.linux-kongress.org/2009/slides/compiler_survey_felix_von_leitner.pdf
>
>
> Seems that LLVM doesn't do so well, but not as bad as Microsoft :P. GCC seems
> to
> be quite good.
>
That same link was sent to the LLVM Developers' mailing list. You'd better
believe they're working on it. Some of those tricks are actually rather "low
hanging fruit" for the LLVM optimizer. Also, the SUN compiler did even worse
than Microsoft so don't be too negative about LLVM.
LLVM is mediocre for the tests given but it's also the newest and most
maintainable codebase of any of them. It was written for readability,
maintainability, and overall hackability. That was the point of the whole
slideshow linked above.
When the Mattathias BASIC project was started, our team looked at GCC because
it already had a backend for the 68k and PowerPC Amiga computers. It seemed to
be the natural choice but when it came to finding documentation for writing a
GCC frontend, the task suddenly jumped to a higher energy requirement. We
chose LLVM even though it means having to write our own 68k backend because
LLVM is MUCH better documented code.
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