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From: jss@hector..UUCP (Jerry Schwarz)
Newsgroups: comp.lang.c
Subject: Re: Porting PCC
Message-ID: <2663@ulysses.homer.nj.att.com>
Date: Wed, 17-Jun-87 17:49:52 EDT
Article-I.D.: ulysses.2663
Posted: Wed Jun 17 17:49:52 1987
Date-Received: Sun, 21-Jun-87 10:35:21 EDT
References: <2082@dg_rtp.UUCP> <5975@brl-smoke.ARPA> <6604@ism780c.UUCP> <21214@sun.uucp> <801@omepd>
Sender: daemon@ulysses.homer.nj.att.com
Reply-To: jss@hector (Jerry Schwarz)
Organization: AT&T Bell Labs, Murray Hill
Lines: 16

In article <801@omepd> mcg@omepd.UUCP (Steven McGeady) writes:
>
>QCC and RCC are almost the same thing.  They differ in the exact algorithm
>used for instruction selection.  RCC does a complex (and time-expensive)
>cost comparison among certain alternatives.  QCC operates on an
>ordered list of alternatives, and simply picks the first one that applies.
>The only files that would differ between the two versions are scommon/cost.c
>and scommon/match.c.
>

McGeady is confusing rcc with pcc2.  Pcc2 was the version that
did the code selection based on costs. The "r" in rcc stands for 
"register".  

Jerry Schwarz
Former member of AT&T UNIX Language Department