Related articles |
---|
[12 earlier articles] |
Re: Unsafe Optimizations (formerly Compiler Design in C...) chip@tct.uucp (1990-06-20) |
Re: Unsafe Optimizations (formerly Compiler Design in C...) grunwald@foobar.Colorado.EDU (Dirk Grunwald) (1990-06-20) |
Re: Unsafe Optimizations (formerly Compiler Design in C...) marti@inf.ethz.ch (1990-06-21) |
Re: Unsafe Optimizations (formerly Compiler Design in C...) pardo@june.cs.washington.edu (1990-06-21) |
Re: Unsafe Optimizations (formerly Compiler Design in C...) kend%mrloog.wr.tek.com@RELAY.CS.NET (Ken Dickey) (1990-06-21) |
Re: Unsafe Optimizations (formerly Compiler Design in C...) chittamu@dino.cs.umass.edu (1990-06-22) |
Re: Unsafe Optimizations (formerly Compiler Design in C...) harrison@necssd.NEC.COM (1990-06-23) |
Newsgroups: | comp.compilers |
From: | harrison@necssd.NEC.COM (Mark Harrison) |
Posted-Date: | 22 Jun 90 14:57:19 GMT |
Keywords: | code, optimize, vector |
Organization: | NEC America Inc. SSD, Irving, TX |
References: | <1990Jun12.163959.2593@esegue.segue.boston.ma.us> <1990Jun15.051349.3016@esegue.segue.boston.ma.us> |
Date: | Sat, 23 Jun 90 04:19:07 GMT |
In article <1990Jun15.051349.3016@esegue.segue.boston.ma.us>, pardo@june.cs.washington.edu (David Keppel) writes:
> while (*d++ = *s++)
> ; /* VOID */
> while (d[i] = s[i])
> ++i;
I interviewed at Convex Computers once, and during my coding test they
asked me what approach I would take to optimize my code. I mentioned
converting array references to pointers, and everyone laughed. Their
vectorizing code generator was able to vectorize array references,
but there wasn't much they could do with pointers. I thought it
was interesting that one computer's optimization was another computer's
de-optimization.
--
Mark Harrison harrison@necssd.NEC.COM
(214)518-5050 {necntc, cs.utexas.edu}!necssd!harrison
standard disclaimers apply...
--
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