Re: 'conservative' GC == 'risky' GC (Hans Boehm)
Mon, 13 Jun 1994 18:49:07 GMT

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Newsgroups: comp.compilers
From: (Hans Boehm)
Keywords: GC
Organization: Xerox Palo Alto Research Center
References: 94-05-084 94-06-061
Date: Mon, 13 Jun 1994 18:49:07 GMT (Richard A. O'Keefe) writes:
>[sp must be valid at all times.]
>If there are other restrictions on the use of SPARC registers,
>please tell me what they are.

The other restriction is that o and l register values are indeterminate
after a save instruction. A restore followed by a save does not get your
old register values back, since the kermel (or some other process) may
have scribbled over them in the meantime.

Hans-J. Boehm

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