--- old/src/share/vm/opto/domgraph.cpp	2015-09-15 15:43:35.098997303 +0200
+++ new/src/share/vm/opto/domgraph.cpp	2015-09-15 15:43:34.874997293 +0200
@@ -505,8 +505,8 @@
 // Perform DFS search.  Setup 'vertex' as DFS to vertex mapping.  Setup
 // 'semi' as vertex to DFS mapping.  Set 'parent' to DFS parent.
 int NTarjan::DFS( NTarjan *ntarjan, VectorSet &visited, PhaseIdealLoop *pil, uint *dfsorder) {
-  // Allocate stack of size C->unique()/8 to avoid frequent realloc
-  GrowableArray <Node *> dfstack(pil->C->unique() >> 3);
+  // Allocate stack of size C->live_nodes()/8 to avoid frequent realloc
+  GrowableArray <Node *> dfstack(pil->C->live_nodes() >> 3);
   Node *b = pil->C->root();
   int dfsnum = 1;
   dfsorder[b->_idx] = dfsnum; // Cache parent's dfsnum for a later use