2005-08-19 Diego Novillo <dnovillo@redhat.com>
+ * tree-cfgcleanup.c (cleanup_tree_cfg): Fix flowgraph change
+ indicator. Return true if the flowgraph changed during
+ cleanup.
+
+2005-08-19 Diego Novillo <dnovillo@redhat.com>
+
PR 23476
* tree-cfgcleanup.c (cleanup_control_expr_graph): Fold the
conditional expression before testing its value.
}
-/* Remove unreachable blocks and other miscellaneous clean up work. */
+/* Remove unreachable blocks and other miscellaneous clean up work.
+ Return true if the flowgraph was modified, false otherwise. */
bool
cleanup_tree_cfg (void)
{
- bool retval;
+ bool retval, changed;
timevar_push (TV_TREE_CLEANUP_CFG);
+ /* Iterate until there are no more cleanups left to do. If any
+ iteration changed the flowgraph, set CHANGED to true. */
+ changed = false;
do
- retval = cleanup_tree_cfg_1 ();
+ {
+ retval = cleanup_tree_cfg_1 ();
+ changed |= retval;
+ }
while (retval);
compact_blocks ();
timevar_pop (TV_TREE_CLEANUP_CFG);
- return retval;
+ return changed;
}
/* Cleanup cfg and repair loop structures. */