(struct inline_remap): Add integrating field.

From-SVN: r4454

gcc/integrate.h

@@ -31,6 +31,10 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
 
 struct inline_remap
 {
+  /* True if we are doing function integration, false otherwise.
+     Used to control whether RTX_UNCHANGING bits are copied by
+     copy_rtx_and_substitute. */
+  int integrating;
   /* Definition of function be inlined.  */
   union tree_node *fndecl;
   /* Place to put insns needed at start of function.  */