expr.c (emit_move_insn_1): When moving complex values in several steps...

        * expr.c (emit_move_insn_1): When moving complex values in several
        steps, emit a CLOBBER to show the destination dies.
Re-add patch.

From-SVN: r20195

gcc/ChangeLog

+Tue Jun  2 22:28:31 1998  Bernd Schmidt <crux@ohara.Informatik.RWTH-Aachen.DE>
+
+	* expr.c (emit_move_insn_1): When moving complex values in several
+	steps, emit a CLOBBER to show the destination dies.
+
 Tue Jun  2 22:17:26 1998  Jeffrey A Law  (law@cygnus.com)
 
 	* expr.c (expand_expr, case ADDR_EXPR): Handle taking the

gcc/expr.c

@@ -2288,6 +2288,10 @@ emit_move_insn_1 (x, y)
 	}
       else
 	{
+	  /* Show the output dies here.  */
+	  if (x != y)
+	    emit_insn (gen_rtx (CLOBBER, VOIDmode, x));
+
 	  emit_insn (GEN_FCN (mov_optab->handlers[(int) submode].insn_code)
 		     (gen_realpart (submode, x), gen_realpart (submode, y)));
 	  emit_insn (GEN_FCN (mov_optab->handlers[(int) submode].insn_code)