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On Mon, Jul 11, 2005 at 11:47:01AM -0700, Marcel Moolenaar wrote:Given that registers are available when a value has been supplied, it's logical to assume (a priori) that a register is unavailable when no value has been supplied.
You are talking about a completely different meaning of unavailable than Andrew was. He's talking about unwinding, i.e. registers which have been modified but not saved by an intervening stack frame.
Ah, I see. Wouldn't this apply only to caller-saved registers? And wouldn't it be reasonable to mark them as unavailable unless proven otherwise?
-- Marcel Moolenaar USPA: A-39004 marcel@xcllnt.net
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