2003-05-22  Jeff Law  <law@redhat.com>

	* expr.c (convert_move): Avoid making silly copies.

--- gcc/expr.c.jj	2004-05-25 17:05:45.000000000 +0200

+++ gcc/expr.c	2004-08-03 17:40:55.114899943 +0200

@@ -531,6 +531,11 @@ convert_move (to, from, unsignedp)

   if (to_real != from_real)

     abort ();

+  /* If the source and destination are already the same, then there's

+     nothing to do.  */

+  if (to == from)

+    return;

+

   /* If FROM is a SUBREG that indicates that we have already done at least

      the required extension, strip it.  We don't handle such SUBREGs as

      TO here.  */