Path: utzoo!attcan!uunet!husc6!mailrus!cornell!uw-beaver!uw-june!pardo
From: pardo@june.cs.washington.edu (David Keppel)
Newsgroups: comp.arch
Subject: Re: register save/restore
Message-ID: <6339@june.cs.washington.edu>
Date: 4 Nov 88 20:11:10 GMT
References: <3300037@m.cs.uiuc.edu> <5938@killer.DALLAS.TX.US> <7580@aw.sei.cmu.edu> <2601@alliant.Alliant.COM>
Reply-To: pardo@cs.washington.edu (David Keppel)
Organization: U of Washington, Computer Science, Seattle
Lines: 15
Disorganization: U of Washington, Computer Science, Seattle

cantrell@alliant.Alliant.COM (Paul Cantrell) writes:
>[ function inlining avoids leaf-register-allocation problems ]
>[ also saves procedure call costs! ]

If the leaf procedure is called often and the hardware has an I-cache,
then inlining the leaves may make the code *slower*.

At an extreme (cache-miss penalty is high and sequential instructions
are not prefetched), callee saves might win simply on the basis of
code and resulting miss-rate penalty.

	;-D on  ( The walking virus )  Pardo
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		    pardo@cs.washington.edu
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