18 lines
706 B
C
18 lines
706 B
C
extern avail_p avails; /* The set of available expressions. */
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extern avail_p av_enter(); /* (avail_p avp, occur_p ocp, byte kind)
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* Puts the available expression in avp
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* in the list of available expressions,
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* if it is not already there. Add ocp to set of
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* occurrences of this expression.
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* If we have a new expression, we test whether
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* the result is saved. When this expression
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* recurs,we test if we can still use the
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* variable into which it was saved.
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* (Kind is the kind of the expression.)
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* Returns a pointer into the list.
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*/
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extern clr_avails(); /* Release all space occupied by the old list
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* of available expressions.
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*/
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