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From: chris@umcp-cs.UUCP (Chris Torek)
Newsgroups: net.bugs.4bsd
Subject: Re: 4.?BSD C fails to optimize a function's last expression--who has fix?
Message-ID: <1492@umcp-cs.UUCP>
Date: Thu, 5-Sep-85 21:29:54 EDT
Article-I.D.: umcp-cs.1492
Posted: Thu Sep  5 21:29:54 1985
Date-Received: Sat, 7-Sep-85 06:02:54 EDT
References: <5216@elsie.UUCP>
Organization: U of Maryland, Computer Science Dept., College Park, MD
Lines: 12
Keywords: C optimizer

Probably the simplest way to fix this would be to get some aid from
the compiler.  The compiler knows when an expression is complete
and the value no longer needed; if it dumped a comment into the
assembly file, c2 could pick that up and know that r0 was no longer
"live".

Of course, the *best* way to fix it would probably be to use a real
optimizing compiler....
-- 
In-Real-Life: Chris Torek, Univ of MD Comp Sci Dept (+1 301 454 4251)
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