function.c (expand_function_end): Do not emit a jump to the "naked" return label…

function.c (expand_function_end): Do not emit a jump to the "naked" return label for fall-through returns.

	* function.c (expand_function_end): Do not emit a jump to the "naked"
	return label for fall-through returns.
	* except.c (sjlj_emit_function_exit): Always place the call to the
	unregister function at the location installed by expand_function_end.

From-SVN: r146570

gcc/ChangeLog

+2009-04-22  Ulrich Weigand  <Ulrich.Weigand@de.ibm.com>
+
+	* function.c (expand_function_end): Do not emit a jump to the "naked"
+	return label for fall-through returns.
+	* except.c (sjlj_emit_function_exit): Always place the call to the
+	unregister function at the location installed by expand_function_end.
+
 2009-04-22  Richard Guenther  <rguenther@suse.de>
 
 	PR tree-optimization/39845

gcc/except.c

@@ -1968,9 +1968,7 @@ sjlj_emit_function_exit_after (rtx after)
 static void
 sjlj_emit_function_exit (void)
 {
-  rtx seq;
-  edge e;
-  edge_iterator ei;
+  rtx seq, insn;
 
   start_sequence ();
 
@@ -1984,31 +1982,11 @@ sjlj_emit_function_exit (void)
      post-dominates all can_throw_internal instructions.  This is
      the last possible moment.  */
 
-  FOR_EACH_EDGE (e, ei, EXIT_BLOCK_PTR->preds)
-    if (e->flags & EDGE_FALLTHRU)
-      break;
-  if (e)
-    {
-      rtx insn;
+  insn = crtl->eh.sjlj_exit_after;
+  if (LABEL_P (insn))
+    insn = NEXT_INSN (insn);
 
-      /* Figure out whether the place we are supposed to insert libcall
-         is inside the last basic block or after it.  In the other case
-         we need to emit to edge.  */
-      gcc_assert (e->src->next_bb == EXIT_BLOCK_PTR);
-      for (insn = BB_HEAD (e->src); ; insn = NEXT_INSN (insn))
-	{
-	  if (insn == crtl->eh.sjlj_exit_after)
-	    {
-	      if (LABEL_P (insn))
-		insn = NEXT_INSN (insn);
-	      emit_insn_after (seq, insn);
-	      return;
-	    }
-	  if (insn == BB_END (e->src))
-	    break;
-	}
-      insert_insn_on_edge (seq, e);
-    }
+  emit_insn_after (seq, insn);
 }
 
 static void

gcc/function.c

@@ -4804,7 +4804,6 @@ expand_function_end (void)
 
     start_sequence ();
     clobber_return_register ();
-    expand_naked_return ();
     seq = get_insns ();
     end_sequence ();
 
@@ -4812,7 +4811,8 @@ expand_function_end (void)
   }
 
   /* Output the label for the naked return from the function.  */
-  emit_label (naked_return_label);
+  if (naked_return_label)
+    emit_label (naked_return_label);
 
   /* @@@ This is a kludge.  We want to ensure that instructions that
      may trap are not moved into the epilogue by scheduling, because