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- /* $Id$ */
- /*
- * (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
- * See the copyright notice in the ACK home directory, in the file "Copyright".
- */
- /* C O N S T A N T P R O P A G A T I O N */
- line_p unique_def(line_p use, bblock_p b, short *defnr_out);
- /* See if there is a unique explicit definition
- * of the variable used by 'use' that
- * reaches 'use'.
- */
- bool value_known(line_p def, offset *val_out);
- /* See if the value stored by definition 'def'
- * is known statically (i.e. is a constant).
- */
- void fold_const(line_p l, bblock_p b, offset val);
- /* Perform the substitutions required for
- * constant folding.
- */
- bool is_use(line_p l);
- /* See if 'l' is a use of a variable.
- */
- bool affected(line_p use, short v, line_p l);
- /* See if the variable referenced by 'use' may
- * be changed by instruction l, which is
- * either a cal, cai or an indirect assignment.
- */
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