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Re: wip-rtl, solstice edition

From: Ludovic Courtès
Subject: Re: wip-rtl, solstice edition
Date: Fri, 29 Jun 2012 13:59:17 +0200
User-agent: Gnus/5.130005 (Ma Gnus v0.5) Emacs/24.1 (gnu/linux)


Andy Wingo <address@hidden> skribis:

> Yes I see what you are saying.  It was only recently that things came
> together enough to be testable at all (to have the circle between
> assembler, linker, and loader).  However, the instructions themselves
> are fairly well documented; do see
> So for this purpose, writing tests should be possible.  WDYT?

Yes, probably.

>> Seriously though, that seems like a good plan.  I wonder what Noah’s
>> attempts at JITing the 2.0 bytecode would have achieved, though, if we
>> think of both JIT and the new VM as an “interim solution” before AOT
>> native compilation.
> It would have been possible but not ideal.  Rewriting the VM to
> e.g. have fixed-size stack frames, only two virtual registers, separate
> debugging information, statically allocate constants, etc. would still
> be necessary, and at that point a refactor to the VM would be more
> difficult.

Yes, good point.

And it’s true that the work on ELF and DWARF is definitely valuable for
the future.



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