Path: utzoo!utgpu!water!watmath!clyde!rutgers!rochester!cornell!batcomputer!pyramid!prls!mips!sjc
From: sjc@mips.COM (Steve "The" Correll)
Newsgroups: comp.arch
Subject: Re: RISC data alignment
Message-ID: <1506@quacky.mips.COM>
Date: 5 Feb 88 08:23:13 GMT
References: <2635@calmasd.GE.COM> <28200092@ccvaxa>
Lines: 13

In article <28200092@ccvaxa>, aglew@ccvaxa.UUCP writes:
) I have often wanted an optimizing compiler that could take
) struct { long a; int b; long c; char d; }
) which is usually mapped into bytes as AAAABBxxCCCCDxxx
) (on a machine where misaligned accesses are penalized)
) and make it into AAAACCCCBBDx.

Note that you'd want to be able to select this optimization independently
of others, since it violates the Kernighan & Ritchie statement that the
addresses of fields increase from left to right, and a particular program
may or may not care about the violation.
-- 
...decwrl!mips!sjc						Steve Correll