+2000-02-25 John Wehle (john@feith.com)
+
+ * rtlanal.c (find_last_value): Allow NULL_RTX for valid_to.
+
2000-02-25 Anthony Green <green@cygnus.com>
* toplev.c (rest_of_compilation): Rebuild jump labels if
return 0;
}
\f
-/* Return the last thing that X was assigned from before *PINSN. Verify that
- the object is not modified up to VALID_TO. If it was, if we hit
- a partial assignment to X, or hit a CODE_LABEL first, return X. If we
- found an assignment, update *PINSN to point to it.
- ALLOW_HWREG is set to 1 if hardware registers are allowed to be the src. */
+/* Return the last thing that X was assigned from before *PINSN. If VALID_TO
+ is not NULL_RTX then verify that the object is not modified up to VALID_TO.
+ If the object was modified, if we hit a partial assignment to X, or hit a
+ CODE_LABEL first, return X. If we found an assignment, update *PINSN to
+ point to it. ALLOW_HWREG is set to 1 if hardware registers are allowed to
+ be the src. */
rtx
find_last_value (x, pinsn, valid_to, allow_hwreg)
if (note && GET_CODE (XEXP (note, 0)) != EXPR_LIST)
src = XEXP (note, 0);
- if (! modified_between_p (src, PREV_INSN (p), valid_to)
+ if ((valid_to == NULL_RTX
+ || ! modified_between_p (src, PREV_INSN (p), valid_to))
/* Reject hard registers because we don't usually want
to use them; we'd rather use a pseudo. */
&& (! (GET_CODE (src) == REG