PR jit/63854: Fix leak of paths within jump threading

gcc/ChangeLog:
	PR jit/63854
	* tree-ssa-threadedge.c (thread_across_edge): Don't just release
	"path", delete it.
	* tree-ssa-threadupdate.c (delete_jump_thread_path): Likewise.

From-SVN: r217804

gcc/ChangeLog

 2014-11-19  David Malcolm  <dmalcolm@redhat.com>
 
 	PR jit/63854
+	* tree-ssa-threadedge.c (thread_across_edge): Don't just release
+	"path", delete it.
+	* tree-ssa-threadupdate.c (delete_jump_thread_path): Likewise.
+
+2014-11-19  David Malcolm  <dmalcolm@redhat.com>
+
+	PR jit/63854
 	* tree-ssa-pre.c (do_regular_insertion): Convert "avail" from
 	vec<> to auto_vec<> to fix a leak.
 

gcc/tree-ssa-threadedge.c

@@ -1150,6 +1150,7 @@ thread_across_edge (gcond *dummy_cond,
 	 through the vector entries.  */
       gcc_assert (path->length () == 0);
       path->release ();
+      delete path;
 
       /* A negative status indicates the target block was deemed too big to
 	 duplicate.  Just quit now rather than trying to use the block as

gcc/tree-ssa-threadupdate.c

@@ -2481,6 +2481,7 @@ delete_jump_thread_path (vec<jump_thread_edge *> *path)
   for (unsigned int i = 0; i < path->length (); i++)
     delete (*path)[i];
   path->release();
+  delete path;
 }
 
 /* Register a jump threading opportunity.  We queue up all the jump