The Unix Heritage Society mailing list
 help / color / mirror / Atom feed
From: Paul Winalski <paul.winalski@gmail.com>
To: Clem Cole <clemc@ccc.com>
Cc: Noel Chiappa <jnc@mercury.lcs.mit.edu>, tuhs@tuhs.org
Subject: [TUHS] Re: I can't drive 55: "GOTO considered harmful" 55th anniversary
Date: Fri, 10 Mar 2023 12:54:21 -0500	[thread overview]
Message-ID: <CABH=_VSwui_phS0UMZ9VtqE3f=cvaEM5G-OTA5m+d0WB6Qh4Qw@mail.gmail.com> (raw)
In-Reply-To: <CAC20D2NNLwA_Hv2OrgG9+xXTNoBCKVvnuYk5v0j8GzP8h3u4Dg@mail.gmail.com>

On 3/10/23, Clem Cole <clemc@ccc.com> wrote:
>
> Arnold's observation about trying to be small is reasonable,
> although contemporaries like BLISS did have support. So the comparison
> should really be to BCPL, PL/360, BLISS, *et al*. for features/size
> [although Wulf cheated, the BLISS-11 compiler was not self-hosting and
> needed a PDP-10 to run it].

For what it's worth, BLISS does not have a GOTO expression (BLISS
doesn't have statements per se--everything is an expression and can be
used as a value).

Wulf was studying code optimization.  His BLISS-11 compiler, and its
successor at DEC, BLISS-16, implemented many advanced (for the day)
optimizations.  In the programming environments at CMU and DEC it was
easier to suffer the mild inconvenience of cross-compilation than to
try to shoehorn the compiler into a 16-bit address space.

It certainly would be possible to implement a native BLISS compiler
for the PDP-11, but you'd have to sacrifice either some of the
optimizations or take a big hit in compilation speed.

-Paul W.

  reply	other threads:[~2023-03-10 17:54 UTC|newest]

Thread overview: 42+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-03-10 11:51 Noel Chiappa
2023-03-10 14:16 ` Ronald Natalie
2023-03-10 14:39   ` John Cowan
2023-03-10 16:30   ` Phil Budne
2023-03-10 17:50     ` Steffen Nurpmeso
2023-03-10 17:57       ` Paul Winalski
2023-03-10 18:12         ` Lawrence Stewart
2023-03-10 17:28   ` Clem Cole
2023-03-10 17:54     ` Paul Winalski [this message]
  -- strict thread matches above, loose matches on Subject: below --
2023-03-10 15:37 Noel Chiappa
2023-03-10 15:46 ` Larry McVoy
2023-03-10 16:04 ` Dan Cross
2023-03-10 18:55 ` Ron Natalie
2023-03-10 19:04   ` Dan Cross
2023-03-10 19:35     ` segaloco via TUHS
2023-03-10 11:37 Noel Chiappa
2023-03-10 15:54 ` Dan Cross
2023-03-12  7:39   ` Anthony Martin
2023-03-12 11:40     ` Dan Cross
2023-03-12 16:40       ` Paul Winalski
2023-03-13  3:25       ` John Cowan
2023-03-13 10:40         ` Alejandro Colomar (man-pages)
2023-03-13 12:19           ` Dan Cross
2023-03-09 23:01 [TUHS] " Steffen Nurpmeso
2023-03-09 23:18 ` [TUHS] " segaloco via TUHS
2023-03-09 23:21   ` Warner Losh
2023-03-09 23:31     ` Luther Johnson
2023-03-09 23:44       ` josh
2023-03-09 23:54       ` Warner Losh
2023-03-10  0:54         ` segaloco via TUHS
2023-03-10  1:08           ` Warner Losh
2023-03-10 10:08             ` Ralph Corderoy
2023-03-10 11:37               ` arnold
2023-03-10 11:56                 ` Ralph Corderoy
2023-03-10 11:59                   ` arnold
2023-03-10 12:11                     ` Ralph Corderoy
2023-03-10  6:15     ` Dave Horsfall
2023-03-10 16:55       ` Steffen Nurpmeso
2023-03-10 17:02         ` Bakul Shah
2023-03-12 20:47         ` Dave Horsfall
2023-03-12 21:50           ` Warner Losh
2023-03-12 22:27             ` Steffen Nurpmeso
2023-03-10  1:31   ` Rich Morin

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to='CABH=_VSwui_phS0UMZ9VtqE3f=cvaEM5G-OTA5m+d0WB6Qh4Qw@mail.gmail.com' \
    --to=paul.winalski@gmail.com \
    --cc=clemc@ccc.com \
    --cc=jnc@mercury.lcs.mit.edu \
    --cc=tuhs@tuhs.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).