PR c/29380

[pf3gnuchains/gcc-fork.git] / gcc / passes.c

diff --git a/gcc/passes.c b/gcc/passes.c
index fe6f637..46e4756 100644 (file)
--- a/gcc/passes.c
+++ b/gcc/passes.c
@@ -727,11 +727,17 @@ execute_todo (unsigned int flags)
   /* Always cleanup the CFG before trying to update SSA .  */
   if (flags & TODO_cleanup_cfg)
     {
+      /* CFG Cleanup can cause a constant to prop into an ARRAY_REF.  */
+      updating_used_alone = true;
+
       if (current_loops)
        cleanup_tree_cfg_loop ();
       else
        cleanup_tree_cfg ();
 
+      /* Update the used alone after cleanup cfg.  */
+      recalculate_used_alone ();
+
       /* When cleanup_tree_cfg merges consecutive blocks, it may
         perform some simplistic propagation when removing single
         valued PHI nodes.  This propagation may, in turn, cause the