Patch to fix reload abort while compiling hpux-x-m68k-aout gdb.

	* reload1.c (calculate_needs_all_insns): When ignore equivalence
	setting insn, clear need_elim, need_reload, and need_operand_change.

From-SVN: r25728

gcc/ChangeLog

+Fri Mar 12 12:35:01 1999  Jim Wilson  <wilson@cygnus.com>
+
+	* reload1.c (calculate_needs_all_insns): When ignore equivalence
+	setting insn, clear need_elim, need_reload, and need_operand_change.
+
 Fri Mar 12 07:54:43 1999  Bruce Korb <korb@datadesign.com>
 
 	* fixinc/fixinc.*: Some changes from the fixincl-branch

gcc/reload1.c

@@ -1387,7 +1387,14 @@ calculate_needs_all_insns (global)
 	  if (set && GET_CODE (SET_DEST (set)) == REG
 	      && reg_renumber[REGNO (SET_DEST (set))] < 0
 	      && reg_equiv_constant[REGNO (SET_DEST (set))])
-	    continue;
+	    {
+	      /* Must clear out the shortcuts, in case they were set last
+		 time through.  */
+	      chain->need_elim = 0;
+	      chain->need_reload = 0;
+	      chain->need_operand_change = 0;
+	      continue;
+	    }
 
 	  /* If needed, eliminate any eliminable registers.  */
 	  if (num_eliminable || num_eliminable_invariants)