Re: [TUHS] pcc in 8th edition

[Nemo Nusquam <cym224@gmail.com>]

On 2021-04-25 18:02, Norman Wilson wrote (in part):
> Some of the earliest work on lcc was done in 1127; Chris
> Fraser worked for the Labs for some years, Dave Hanson
> collaborated from his appointment at Princeton.  I believe
> there was a /usr/bin/lcc.  Some programs used it, either
> because they needed some part of the ISO syntax (pcc2 was
> pre-ISO) or just because.
>
> I don't think that version of lcc used Reiser's c2 optimizer;
> it generated reasonably good code by itself, including
> emitting auto-increment/decrement instructions.  Later
> versions of lcc (such as that I later adopted as cc in
> my personal V10 world) couldn't do that any more, so I
> had to keep c2, and in fact to modify it to turn
> 	addl3 a,b,(p)
> 	mova 4(p),p
> into
> 	addl3 a,b,(p)+
> (or maybe it was addl2 $4,p, I forget)
>
> But that's another story which I'll tell only if asked,
> and nothing to do with the original question.
Please consider yourself asked. #6-)

N.