[PATCH 7/9] tree-ssa-sccvn.c: use auto_vec for sccvn_dom_walker::cond_stack

[tbsaunde+gcc]

From: Trevor Saunders <tbsaunde+...@tbsaunde.org>

gcc/ChangeLog:

2016-06-29  Trevor Saunders  <tbsaunde+...@tbsaunde.org>

        * tree-ssa-sccvn.c (sccvn_dom_walker::~sccvn_dom_walker): remove.
(sccvn_dom_walker): make cond_stack an auto_vec.
---
 gcc/tree-ssa-sccvn.c | 10 ++--------
 1 file changed, 2 insertions(+), 8 deletions(-)

diff --git a/gcc/tree-ssa-sccvn.c b/gcc/tree-ssa-sccvn.c
index 0cbd2cd..95306c5 100644
--- a/gcc/tree-ssa-sccvn.c
+++ b/gcc/tree-ssa-sccvn.c
@@ -4444,8 +4444,7 @@ class sccvn_dom_walker : public dom_walker
 {
 public:
   sccvn_dom_walker ()
-    : dom_walker (CDI_DOMINATORS, true), fail (false), cond_stack (vNULL) {}
-  ~sccvn_dom_walker ();
+    : dom_walker (CDI_DOMINATORS, true), fail (false), cond_stack (0) {}
 
   virtual edge before_dom_children (basic_block);
   virtual void after_dom_children (basic_block);
@@ -4456,15 +4455,10 @@ public:
                     enum tree_code code, tree lhs, tree rhs, bool value);
 
   bool fail;
-  vec<std::pair <basic_block, std::pair <vn_nary_op_t, vn_nary_op_t> > >
+  auto_vec<std::pair <basic_block, std::pair <vn_nary_op_t, vn_nary_op_t> > >
     cond_stack;
 };
 
-sccvn_dom_walker::~sccvn_dom_walker ()
-{
-  cond_stack.release ();
-}
-
 /* Record a temporary condition for the BB and its dominated blocks.  */
 
 void
-- 
2.7.4