re PR middle-end/56461 (GCC is leaking lots of memory)

	PR middle-end/56461
	* tree-flow.h (edge_var_map_vector): Change into va_heap, vl_embed
	vector.
	* tree-ssa.c (redirect_edge_var_map_add): Use vec_safe_reserve and
	vec_safe_push, always update *slot.
	(redirect_edge_var_map_clear): Use vec_free.
	(redirect_edge_var_map_dup): Use vec_safe_copy and vec_safe_reserve.
	(free_var_map_entry): Use vec_free.
	* tree-cfgcleanup.c (remove_forwarder_block_with_phi): Use
	FOR_EACH_VEC_SAFE_ELT instead of FOR_EACH_VEC_ELT.

From-SVN: r196313

1 files changed, 8 insertions, 11 deletions

diff --git a/gcc/tree-ssa.c b/gcc/tree-ssa.c
index e08bcf8..b0619fa 100644
--- a/gcc/tree-ssa.c
+++ b/gcc/tree-ssa.c
@@ -59,16 +59,13 @@ redirect_edge_var_map_add (edge e, tree result, tree def, source_location locus)
   slot = pointer_map_insert (edge_var_maps, e);
   head = (edge_var_map_vector *) *slot;
   if (!head)
-    {
-      head = new edge_var_map_vector;
-      head->create (5);
-      *slot = head;
-    }
+    vec_safe_reserve (head, 5);
   new_node.def = def;
   new_node.result = result;
   new_node.locus = locus;
 
-  head->safe_push (new_node);
+  vec_safe_push (head, new_node);
+  *slot = head;
 }
 
 
@@ -88,7 +85,7 @@ redirect_edge_var_map_clear (edge e)
   if (slot)
     {
       head = (edge_var_map_vector *) *slot;
-      delete head;
+      vec_free (head);
       *slot = NULL;
     }
 }
@@ -115,11 +112,11 @@ redirect_edge_var_map_dup (edge newe, edge olde)
     return;
   head = (edge_var_map_vector *) *old_slot;
 
-  edge_var_map_vector *new_head = new edge_var_map_vector;
+  edge_var_map_vector *new_head = NULL;
   if (head)
-    *new_head = head->copy ();
+    new_head = vec_safe_copy (head);
   else
-    new_head->create (5);
+    vec_safe_reserve (new_head, 5);
   *new_slot = new_head;
 }
 
@@ -151,7 +148,7 @@ free_var_map_entry (const void *key ATTRIBUTE_UNUSED,
 		    void *data ATTRIBUTE_UNUSED)
 {
   edge_var_map_vector *head = (edge_var_map_vector *) *value;
-  delete head;
+  vec_free (head);
   return true;
 }