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From: chris@umcp-cs.UUCP (Chris Torek)
Newsgroups: net.lang.c,net.bugs.4bsd
Subject: Re: VAX 4.2BSD cc compiler bug
Message-ID: <3000@umcp-cs.UUCP>
Date: Sat, 1-Feb-86 22:22:05 EST
Article-I.D.: umcp-cs.3000
Posted: Sat Feb  1 22:22:05 1986
Date-Received: Mon, 3-Feb-86 05:40:49 EST
References: <22@vaxine.UUCP>
Organization: U of Maryland, Computer Science Dept., College Park, MD
Lines: 11
Xref: watmath net.lang.c:7743 net.bugs.4bsd:1949

This has been fixed for ages.  The problem is in /lib/c2, where it
folds cvt[bw]l+bicl instruction pairs into extzv instructions: it
should not do this if the left operand of the cvt instruction
contains an auto increment or decrement.  The easiest way to fix
/lib/c2 is to disable the optimisation completely.  A better fix
is no doubt already in the Mt. Xinu bug list and is already in the
4.3 c2.
-- 
In-Real-Life: Chris Torek, Univ of MD Comp Sci Dept (+1 301 454 1415)
UUCP:	seismo!umcp-cs!chris
CSNet:	chris@umcp-cs		ARPA:	chris@mimsy.umd.edu