function.c (purge_addressof_1): For ADDRESSOF...

	* function.c (purge_addressof_1): For ADDRESSOF, see if SUB is a
	hard or virtual register and copy into pseudo if replacement fails.

From-SVN: r65798

gcc/ChangeLog

 2003-04-18  Richard Kenner  <kenner@vlsi1.ultra.nyu.edu>
 
-	* cfgcleanup.c (flow_find_cross_jump): Use INSN_P,not active_insn_p.
+	* function.c (purge_addressof_1): For ADDRESSOF, see if SUB is a
+	hard or virtual register and copy into pseudo if replacement fails.
+
+	* cfgcleanup.c (flow_find_cross_jump): Use INSN_P, not active_insn_p.
 
 	* expmed.c (mask_rtx): Avoid undefined shifts for BITSIZE of 0.
 

gcc/function.c

@@ -3052,7 +3052,15 @@ purge_addressof_1 (loc, insn, force, store, may_postpone, ht)
 	return true;
 
       start_sequence ();
-      sub = force_operand (sub, NULL_RTX);
+
+      /* If SUB is a or virtual register, try it as a pseudo-register. 
+	 Otherwise, perhaps SUB is an expression, so generate code to compute
+	 it.  */
+      if (GET_CODE (sub) == REG && REGNO (sub) <= LAST_VIRTUAL_REGISTER)
+	sub = copy_to_reg (sub);
+      else
+	sub = force_operand (sub, NULL_RTX);
+
       if (! validate_change (insn, loc, sub, 0)
 	  && ! validate_replace_rtx (x, sub, insn))
 	abort ();