Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sun-barr!apple!snorkelwacker.mit.edu!spool.mu.edu!news.cs.indiana.edu!arizona.edu!arizona!dave
From: dave@cs.arizona.edu (Dave P. Schaumann)
Newsgroups: comp.lang.c
Subject: Re: Heroic constant folding (was micro-optimizing
Message-ID: <992@caslon.cs.arizona.edu>
Date: 2 Mar 91 05:00:57 GMT
References: <10191@dog.ee.lbl.gov> <14522@ganymede.inmos.co.uk> <10450@dog.ee.lbl.gov> <1991Mar2.010049.21044@grebyn.com>
Organization: U of Arizona CS Dept, Tucson
Lines: 24

In article <1991Mar2.010049.21044@grebyn.com> ckp@grebyn.com (Checkpoint Technologies) writes:
|[...]I'd sure like to see a compiler that
|could change the following:
|
|int fib_array[1024];
|[code deleted]
|
|...into...
|
|int fib_array[1024] = {1, 1, 2, 3, 5, 8, 13, 21, /* you get the idea */
|
|I know, this is asking a LOT. But hey, I can ask, can't I?

Do you have any idea what the value of fib_array[1024] is??!!!!!
You're asking more than just "a LOT" from the compiler...

A quick calculation reveals fib_array[1024] is approximately 2.7 E 213.
You'd need a seriously capacious int type to hold that...

-- 
		Dave Schaumann		dave@cs.arizona.edu
'Dog Gang'!  Where do they get off calling us the 'Dog Gang'?  I'm beginning to
think the party's over.  I'm beginning to think maybe we don't need a dog.  Or
maybe we need a *new* dog.  Or maybe we need a *cat*! - Amazing Stories