[PATCH] Fix PR bootstrap/63995

[Ilya Enkovich]

Hi,

This patch makes optimization for bounds lifetime reduction to ignore debug 
stetments.  This fixes stage2 and stage3 comparision for instrumented boostrap. 
 OK for trunk?

Thanks,
Ilya
--
2014-11-26  Ilya Enkovich  <ilya.enkov...@intel.com>

        PR bootstrap/63995
        * tree-chkp-opt.c (chkp_reduce_bounds_lifetime): Ignore
        debug statement when searching for a new position for
        bounds load/creation statement.


diff --git a/gcc/tree-chkp-opt.c b/gcc/tree-chkp-opt.c
index ff390d7..92e0694 100644
--- a/gcc/tree-chkp-opt.c
+++ b/gcc/tree-chkp-opt.c
@@ -1175,6 +1175,9 @@ chkp_reduce_bounds_lifetime (void)
 
       FOR_EACH_IMM_USE_STMT (use_stmt, use_iter, op)
        {
+         if (is_gimple_debug (use_stmt))
+           continue;
+
          if (dom_bb &&
              dominated_by_p (CDI_DOMINATORS,
                              dom_bb, gimple_bb (use_stmt)))