rtlanal.c (reg_referenced_p): A CLOBBER of a MEM uses any REGs inside the MEM.

* rtlanal.c (reg_referenced_p): A CLOBBER of a MEM uses any REGs
inside the MEM.

From-SVN: r31509

gcc/ChangeLog

+2000-01-19  Geoff Keating  <geoffk@cygnus.com>
+
+	* rtlanal.c (reg_referenced_p): A CLOBBER of a MEM uses any REGs
+	inside the MEM.
+
 2000-01-20  Michael Hayes  <m.hayes@elec.canterbury.ac.nz>
 
 	* loop.c (loop_optimize): Allocate loop_info structure for each loop

gcc/rtlanal.c

@@ -422,6 +422,12 @@ reg_referenced_p (x, body)
 	  return 1;
       return 0;
       
+    case CLOBBER:
+      if (GET_CODE (XEXP (body, 0)) == MEM)
+	if (reg_overlap_mentioned_p (x, XEXP (XEXP (body, 0), 0)))
+	  return 1;
+      return 0;
+
     default:
       return 0;
     }