Re: local arrays and stack

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From	Keith Thompson <kst-u@mib.org>
Newsgroups	comp.lang.c
Subject	Re: local arrays and stack
Date	Mon, 23 Mar 2015 14:34:25 -0700
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Bartc <bc@freeuk.com> writes:
[...]
> But if a simple pointer is to be used, then just using malloc and free
> starts to sound attractive, if chkstk_ms() needs to be called anyway.

If we're counting CPU instructions, compare the number of instructions
executed to allocate a VLA on the stack vs. the number of instructions
executed for a call to malloc() followed by a call to free().

Figuring out how to generate code to allocate VLAs correctly might be a
little tricky -- but that work has already been done.

-- 
Keith Thompson (The_Other_Keith) kst-u@mib.org  <http://www.ghoti.net/~kst>
Working, but not speaking, for JetHead Development, Inc.
"We must do something.  This is something.  Therefore, we must do this."
    -- Antony Jay and Jonathan Lynn, "Yes Minister"

Thread

local arrays and stack fir <profesor.fir@gmail.com> - 2015-03-22 01:51 -0700
  local arrays and stack asetofsymbols@gmail.com - 2015-03-22 02:23 -0700
  Re: local arrays and stack Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-03-22 13:22 -0700
    Re: local arrays and stack fir <profesor.fir@gmail.com> - 2015-03-23 01:55 -0700
  Re: local arrays and stack Xcott Craver <xcottcraver@gmail.com> - 2015-03-22 15:07 -0700
    Re: local arrays and stack fir <profesor.fir@gmail.com> - 2015-03-23 01:50 -0700
      Re: local arrays and stack Robert Wessel <robertwessel2@yahoo.com> - 2015-03-23 04:26 -0500
        Re: local arrays and stack fir <profesor.fir@gmail.com> - 2015-03-23 06:53 -0700
        Re: local arrays and stack Xcott Craver <xcottcraver@gmail.com> - 2015-03-23 07:29 -0700
          Re: local arrays and stack fir <profesor.fir@gmail.com> - 2015-03-23 08:34 -0700
          Re: local arrays and stack Robert Wessel <robertwessel2@yahoo.com> - 2015-03-23 19:57 -0500
          Re: local arrays and stack fir <profesor.fir@gmail.com> - 2015-03-24 04:01 -0700
            Re: local arrays and stack fir <profesor.fir@gmail.com> - 2015-03-24 04:37 -0700
            Re: local arrays and stack David Brown <david.brown@hesbynett.no> - 2015-03-24 13:04 +0100
              Re: local arrays and stack glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-03-24 17:29 +0000
                Re: local arrays and stack David Brown <david.brown@hesbynett.no> - 2015-03-24 20:01 +0100
        Re: local arrays and stack Keith Thompson <kst-u@mib.org> - 2015-03-23 08:24 -0700
          Re: local arrays and stack fir <profesor.fir@gmail.com> - 2015-03-23 08:42 -0700
            Re: local arrays and stack Bartc <bc@freeuk.com> - 2015-03-23 16:07 +0000
              Re: local arrays and stack fir <profesor.fir@gmail.com> - 2015-03-23 09:15 -0700
              Re: local arrays and stack Keith Thompson <kst-u@mib.org> - 2015-03-23 09:16 -0700
                Re: local arrays and stack Bartc <bc@freeuk.com> - 2015-03-23 16:34 +0000
                Re: local arrays and stack Xcott Craver <xcottcraver@gmail.com> - 2015-03-23 10:12 -0700
                Re: local arrays and stack Bartc <bc@freeuk.com> - 2015-03-23 17:44 +0000
                Re: local arrays and stack fir <profesor.fir@gmail.com> - 2015-03-23 11:47 -0700
                Re: local arrays and stack Xcott Craver <xcottcraver@gmail.com> - 2015-03-23 12:06 -0700
                Re: local arrays and stack Bartc <bc@freeuk.com> - 2015-03-23 20:25 +0000
                Re: local arrays and stack Xcott Craver <xcottcraver@gmail.com> - 2015-03-23 14:10 -0700
                Re: local arrays and stack Bartc <bc@freeuk.com> - 2015-03-23 22:22 +0000
                Re: local arrays and stack fir <profesor.fir@gmail.com> - 2015-03-23 23:57 -0700
                Re: local arrays and stack David Brown <david.brown@hesbynett.no> - 2015-03-24 10:28 +0100
                Re: local arrays and stack Bartc <bc@freeuk.com> - 2015-03-24 10:44 +0000
                Re: local arrays and stack Martin Shobe <martin.shobe@yahoo.com> - 2015-03-24 06:38 -0500
                Re: local arrays and stack Martin Shobe <martin.shobe@yahoo.com> - 2015-03-24 09:57 -0500
                Re: local arrays and stack David Brown <david.brown@hesbynett.no> - 2015-03-24 13:22 +0100
                Re: local arrays and stack Bartc <bc@freeuk.com> - 2015-03-25 16:07 +0000
                Re: local arrays and stack David Brown <david.brown@hesbynett.no> - 2015-03-25 17:42 +0100
                Re: local arrays and stack Bartc <bc@freeuk.com> - 2015-03-25 19:06 +0000
                Re: local arrays and stack fir <profesor.fir@gmail.com> - 2015-03-25 12:26 -0700
                Re: local arrays and stack fir <profesor.fir@gmail.com> - 2015-03-25 13:20 -0700
                Re: local arrays and stack Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-03-25 12:28 -0700
                Re: local arrays and stack David Brown <david.brown@hesbynett.no> - 2015-03-25 21:45 +0100
                Re: local arrays and stack Keith Thompson <kst-u@mib.org> - 2015-03-25 12:50 -0700
                Re: local arrays and stack Bartc <bc@freeuk.com> - 2015-03-25 22:33 +0000
                Re: local arrays and stack David Brown <david.brown@hesbynett.no> - 2015-03-25 23:57 +0100
                Re: local arrays and stack David Brown <david.brown@hesbynett.no> - 2015-03-25 21:42 +0100
                Re: local arrays and stack fir <profesor.fir@gmail.com> - 2015-03-25 09:55 -0700
                Re: local arrays and stack Keith Thompson <kst-u@mib.org> - 2015-03-25 12:36 -0700
                Re: local arrays and stack fir <profesor.fir@gmail.com> - 2015-03-25 13:04 -0700
                Re: local arrays and stack David Brown <david.brown@hesbynett.no> - 2015-03-25 21:52 +0100
                Re: local arrays and stack Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-03-25 15:18 -0700
                Re: local arrays and stack David Brown <david.brown@hesbynett.no> - 2015-03-26 00:02 +0100
                Re: local arrays and stack Melzzzzz <mel@zzzzz.com> - 2015-03-26 00:47 +0100
                Re: local arrays and stack Mel <mel@zzzzz.com> - 2015-03-24 14:58 +0100
                Re: local arrays and stack Xcott Craver <xcottcraver@gmail.com> - 2015-03-24 06:58 -0700
                Re: local arrays and stack Keith Thompson <kst-u@mib.org> - 2015-03-23 14:34 -0700
                Re: local arrays and stack David Brown <david.brown@hesbynett.no> - 2015-03-24 10:16 +0100
                Re: local arrays and stack David Brown <david.brown@hesbynett.no> - 2015-03-24 09:55 +0100
                Re: local arrays and stack Noob <root@127.0.0.1> - 2015-03-24 10:23 +0100
                Re: local arrays and stack Tim Rentsch <txr@alumni.caltech.edu> - 2015-03-24 12:18 -0700
                Re: local arrays and stack Keith Thompson <kst-u@mib.org> - 2015-03-24 13:42 -0700
                Re: local arrays and stack Tim Rentsch <txr@alumni.caltech.edu> - 2015-03-25 08:47 -0700
            Re: local arrays and stack Xcott Craver <xcottcraver@gmail.com> - 2015-03-23 09:32 -0700
              Re: local arrays and stack fir <profesor.fir@gmail.com> - 2015-03-23 09:57 -0700
              Re: local arrays and stack Keith Thompson <kst-u@mib.org> - 2015-03-23 10:37 -0700
                Re: local arrays and stack Xcott Craver <xcottcraver@gmail.com> - 2015-03-23 10:49 -0700
                Re: local arrays and stack Keith Thompson <kst-u@mib.org> - 2015-03-23 12:48 -0700
                Re: local arrays and stack jt@toerring.de (Jens Thoms Toerring) - 2015-03-23 22:29 +0000
                Re: local arrays and stack James Kuyper <jameskuyper@verizon.net> - 2015-03-23 19:03 -0400
                Re: local arrays and stack jt@toerring.de (Jens Thoms Toerring) - 2015-03-23 23:36 +0000
                Re: local arrays and stack fir <profesor.fir@gmail.com> - 2015-03-24 02:17 -0700
                Re: local arrays and stack Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-03-23 11:56 -0700
          Re: local arrays and stack Robert Wessel <robertwessel2@yahoo.com> - 2015-03-23 20:00 -0500
            Re: local arrays and stack David Brown <david.brown@hesbynett.no> - 2015-03-24 10:39 +0100

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