rtlanal.c (reg_overlap_mentioned_p): Handle CONCAT.

1999-12-15  David S. Miller  <davem@redhat.com>

	* rtlanal.c (reg_overlap_mentioned_p): Handle CONCAT.

From-SVN: r30956

gcc/ChangeLog

+1999-12-15  David S. Miller  <davem@redhat.com>
+
+	* rtlanal.c (reg_overlap_mentioned_p): Handle CONCAT.
+
 Wed Dec 15 15:05:30 MET 1999  Jan Hubicka  <hubicka@freesoft.cz>
 
 	* flow.c (calculate_loop_depth): Make global, remove prototype,

gcc/rtlanal.c

@@ -964,6 +964,13 @@ reg_overlap_mentioned_p (x, in)
 	  return 1;
       return 0;
     }
+  else if (GET_CODE (x) == CONCAT)
+    {
+      if (reg_overlap_mentioned_p (XEXP (x, 0), in)
+	  || reg_overlap_mentioned_p (XEXP (x, 1), in))
+	return 1;
+      return 0;
+    }
   else
     abort ();