optabs.c (expand_binop): In multi-word add cases, ensure XTARGET is copied to…

optabs.c (expand_binop): In multi-word add cases, ensure XTARGET is copied to TARGET if they are different.

	* optabs.c (expand_binop): In multi-word add cases, ensure
	XTARGET is copied to TARGET if they are different.

From-SVN: r65632

gcc/ChangeLog

+2003-04-15  Richard Kenner  <kenner@vlsi1.ultra.nyu.edu>
+
+	* optabs.c (expand_binop): In multi-word add cases, ensure
+	XTARGET is copied to TARGET if they are different.
+
 2003-04-15  Olivier Hainque <hainque@act-europe.fr>
 
 	* except.c (resolve_fixup_regions): Avoid dereferencing null pointer

gcc/optabs.c

@@ -1299,7 +1299,8 @@ expand_binop (mode, binoptab, op0, op1, target, unsignedp, methods)
 
       if (i == GET_MODE_BITSIZE (mode) / (unsigned) BITS_PER_WORD)
 	{
-	  if (mov_optab->handlers[(int) mode].insn_code != CODE_FOR_nothing)
+	  if (mov_optab->handlers[(int) mode].insn_code != CODE_FOR_nothing
+	      || ! rtx_equal_p (target, xtarget))
 	    {
 	      rtx temp = emit_move_insn (target, xtarget);