--- old/src/share/vm/opto/ifnode.cpp	2015-10-06 09:57:32.398077492 +0200
+++ new/src/share/vm/opto/ifnode.cpp	2015-10-06 09:57:32.322077496 +0200
@@ -1625,6 +1625,17 @@
   return this;
 }
 
+Node* IfProjNode::Ideal(PhaseGVN* phase, bool can_reshape) {
+  const Type* t = phase->type(in(0));
+  if (in(0)->outcnt() == 2 && t != Type::TOP && always_taken(t->is_tuple())) {
+    // cut off dead branch if this branch is always taken
+    Node* other = in(0)->as_If()->proj_out(!is_IfTrue());
+    other->set_req(0, phase->C->top());
+    return this;
+  }
+  return NULL;
+}
+
 #ifndef PRODUCT
 //-------------------------------related---------------------------------------
 // An IfProjNode's related node set consists of its input (an IfNode) including