Initial revision

util/ego/cs/cs_avail.h

@@ -0,0 +1,18 @@
+extern avail_p	avails;		/* The set of available expressions. */
+
+extern avail_p	av_enter();	/* (avail_p avp, occur_p ocp, byte kind)
+				 * Puts the available expression in avp
+				 * in the list of available expressions,
+				 * if it is not already there. Add ocp to set of
+				 * occurrences of this expression.
+				 * If we have a new expression, we test whether
+				 * the result is saved. When this expression
+				 * recurs,we test if we can still use the 
+				 * variable into which it was saved.
+				 * (Kind is the kind of the expression.)
+				 * Returns a pointer into the list.
+				 */
+
+extern		clr_avails();	/* Release all space occupied by the old list
+				 * of available expressions.
+				 */