sibcall.c (optimize_sibling_and_tail_recursive_call): Also remove…

sibcall.c (optimize_sibling_and_tail_recursive_call): Also remove RTX_UNCHANGING_P markers for successful tail-recursive replacement.

        * sibcall.c (optimize_sibling_and_tail_recursive_call): Also remove
        RTX_UNCHANGING_P markers for successful tail-recursive replacement.

From-SVN: r57290

gcc/ChangeLog

 2002-09-18  Richard Henderson  <rth@redhat.com>
 
+	* sibcall.c (optimize_sibling_and_tail_recursive_call): Also remove
+	RTX_UNCHANGING_P markers for successful tail-recursive replacement.
+
+2002-09-18  Richard Henderson  <rth@redhat.com>
+
 	* real.c (round_for_format): Collect sticky as unsigned long, not bool.
 
 2002-09-19  Alan Modra  <amodra@bigpond.net.au>

gcc/sibcall.c

@@ -574,8 +574,8 @@ optimize_sibling_and_tail_recursive_calls ()
   rtx insn, insns;
   basic_block alternate_exit = EXIT_BLOCK_PTR;
   bool no_sibcalls_this_function = false;
-  int successful_sibling_call = 0;
-  int replaced_call_placeholder = 0;
+  bool successful_replacement = false;
+  bool replaced_call_placeholder = false;
   edge e;
 
   insns = get_insns ();
@@ -704,10 +704,11 @@ optimize_sibling_and_tail_recursive_calls ()
 	  /* Select a set of insns to implement the call and emit them.
 	     Tail recursion is the most efficient, so select it over
 	     a tail/sibling call.  */
-	  if (sibcall)
-	    successful_sibling_call = 1;
 
-	  replaced_call_placeholder = 1;
+	  if (sibcall || tailrecursion)
+	    successful_replacement = true;
+	  replaced_call_placeholder = true;
+
 	  replace_call_placeholder (insn,
 				    tailrecursion != 0
 				      ? sibcall_use_tail_recursion
@@ -717,7 +718,7 @@ optimize_sibling_and_tail_recursive_calls ()
 	}
     }
 
-  if (successful_sibling_call)
+  if (successful_replacement)
     {
       rtx insn;
       tree arg;