* tree-cfg.c (cleanup_tree_cfg): Pull a call to

	cleanup_control_flow() out of the while loop.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@88395 138bc75d-0d04-0410-961f-82ee72b054a4

2 files changed, 14 insertions, 3 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index d7d99a7887c..9b4c512add6 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2004-10-01  Kazu Hirata  <kazu@cs.umass.edu>
+
+	* tree-cfg.c (cleanup_tree_cfg): Pull a call to
+	cleanup_control_flow() out of the while loop.
+
 2004-10-01  Paolo Bonzini  <bonzini@gnu.org>
 
 	* tree-vectorizer.c (vectorizable_operation): Fail unless
diff --git a/gcc/tree-cfg.c b/gcc/tree-cfg.c
index 025e677c396..72f73784d60 100644
--- a/gcc/tree-cfg.c
+++ b/gcc/tree-cfg.c
@@ -717,16 +717,22 @@ cleanup_tree_cfg (void)
 
   timevar_push (TV_TREE_CLEANUP_CFG);
 
-  /* These three transformations can cascade, so we iterate on them until
+  retval = cleanup_control_flow ();
+
+  /* These two transformations can cascade, so we iterate on them until
      nothing changes.  */
   while (something_changed)
     {
-      something_changed = cleanup_control_flow ();
-      something_changed |= delete_unreachable_blocks ();
+      something_changed = delete_unreachable_blocks ();
       something_changed |= thread_jumps ();
       retval |= something_changed;
     }
 
+#ifdef ENABLE_CHECKING
+  if (retval)
+    gcc_assert (!cleanup_control_flow ());
+#endif
+
   /* Merging the blocks creates no new opportunities for the other
      optimizations, so do it here.  */
   merge_seq_blocks ();