(instantiate_decl): Always store addr back into x.

From-SVN: r12842

gcc/function.c

@@ -2684,9 +2684,8 @@ instantiate_decl (x, size, valid_only)
 
   instantiate_virtual_regs_1 (&addr, NULL_RTX, 0);
 
-  if (! valid_only)
-    return;
-
+  if (valid_only)
+    {
       /* Now verify that the resulting address is valid for every integer or
 	 floating-point mode up to and including SIZE bytes long.  We do this
 	 since the object might be accessed in any mode and frame addresses
@@ -2703,9 +2702,10 @@ instantiate_decl (x, size, valid_only)
 	   mode = GET_MODE_WIDER_MODE (mode))
 	if (! memory_address_p (mode, addr))
 	  return;
+    }
 
-  /* Otherwise, put back the address, now that we have updated it and we
-     know it is valid.  */
+  /* Put back the address now that we have updated it and we either know
+     it is valid or we don't care whether it is valid.  */
 
   XEXP (x, 0) = addr;
 }