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From: antispam@fricas.org (Waldek Hebisch)
Newsgroups: comp.os.vms
Subject: Re: ISO: The Eiffel OO programming language and IDE, on VMS
Date: Sat, 29 Mar 2025 20:47:57 -0000 (UTC)
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Chris Townley <news@cct-net.co.uk> wrote:
> On 29/03/2025 18:19, Waldek Hebisch wrote:
>> Simon Clubley <clubley@remove_me.eisner.decus.org-earth.ufp> wrote:
>>> On 2025-03-27, Arne Vajhøj <arne@vajhoej.dk> wrote:
>>>>
>>>> or:
>>>> - people use a different backend than LLVM (GCC, custom, whatever)
>>>>
>>>
>>> If anyone knows of a serious backend code generator other than LLVM
>>> or GCC, please feel free to point me at it. :-)
>>>
>>> Simon.
>>>
>>> PS: And no Bill, the Amsterdam Compiler Kit does not apply. :-)
>> 
>> Depends what you consider serious (and what "backend" means).
>> There is bunch of compilers that use their own backend,
>> for example optimized Ocaml or SBCL Lisp.  If you aim at
>> highest possible speed, regardless of language, then they
>> can not compete.  If you look at native performance for
>> relevant languages, then they are top performers (there are
>> Lisp compilers which generate code via translation to C,
>> resulting speed is lower than obtained using SBCL).
>> 
>> Note that context was porting languages, "classic"
>> languages are covered by VSI, so relevant things are
>> backends for more exotic languages.  There was recent
>> trend to adopt LLVM in such cases, and Julia seem to
>> be prominent example of language dependent on LLVM.
>> But more popular approach seem to be via custom
>> backend or via C.  For example Haskell folks some time
>> ago said that LLVM does not really give them advantages
>> compared to going via C, and C way is easier.
>> 
> 
> Isn't that what GNAT does for Ada?

I am not sure what you wanted to say.  GNAT is a native
compiler using GCC backend.  There were some talk about
interfacing it to LLVM, but I am not aware of anything
working in this direction.  GNAT does _not_ generate
C, it interfaces with the backend using constructs not
available in C.

-- 
                              Waldek Hebisch