26 Apr
2021
26 Apr
'21
6:18 a.m.
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.