--- /dev/null	2010-06-11 08:59:45.055002317 +0100
+++ new/hotspot/src/share/vm/shark/sharkFunction.hpp	2010-06-11 14:57:44.000000000 +0100
@@ -0,0 +1,111 @@
+/*
+ * Copyright (c) 1999, 2007, Oracle and/or its affiliates. All rights reserved.
+ * Copyright 2008, 2009 Red Hat, Inc.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+class SharkTopLevelBlock;
+class DeferredZeroCheck;
+
+class SharkFunction : public SharkTargetInvariants {
+ friend class SharkStackWithNormalFrame;
+
+ public:
+  static llvm::Function* build(ciEnv*        env,
+                               SharkBuilder* builder,
+                               ciTypeFlow*   flow,
+                               const char*   name) {
+    SharkFunction function(env, builder, flow, name);
+    return function.function();
+  }
+
+ private:
+  SharkFunction(ciEnv*        env,
+                SharkBuilder* builder,
+                ciTypeFlow*   flow,
+                const char*   name)
+    : SharkTargetInvariants(env, builder, flow) { initialize(name); }
+
+ private:
+  void initialize(const char* name);
+
+ private:
+  llvm::Function*                   _function;
+  SharkTopLevelBlock**              _blocks;
+  GrowableArray<DeferredZeroCheck*> _deferred_zero_checks;
+  SharkStack*                       _stack;
+
+ public:
+  llvm::Function* function() const {
+    return _function;
+  }
+  int block_count() const {
+    return flow()->block_count();
+  }
+  SharkTopLevelBlock* block(int i) const {
+    assert(i < block_count(), "should be");
+    return _blocks[i];
+  }
+  GrowableArray<DeferredZeroCheck*>* deferred_zero_checks() {
+    return &_deferred_zero_checks;
+  }
+  SharkStack* stack() const {
+    return _stack;
+  }
+
+  // On-stack replacement
+ private:
+  bool is_osr() const {
+    return flow()->is_osr_flow();
+  }
+  const llvm::FunctionType* entry_point_type() const {
+    if (is_osr())
+      return SharkType::osr_entry_point_type();
+    else
+      return SharkType::entry_point_type();
+  }
+
+  // Block management
+ private:
+  llvm::BasicBlock* _block_insertion_point;
+
+  void set_block_insertion_point(llvm::BasicBlock* block_insertion_point) {
+    _block_insertion_point = block_insertion_point;
+  }
+  llvm::BasicBlock* block_insertion_point() const {
+    return _block_insertion_point;
+  }
+
+ public:
+  llvm::BasicBlock* CreateBlock(const char* name = "") const {
+    return llvm::BasicBlock::Create(
+      SharkContext::current(), name, function(), block_insertion_point());
+  }
+
+  // Deferred zero checks
+ public:
+  void add_deferred_zero_check(SharkTopLevelBlock* block,
+                               SharkValue*         value);
+
+ private:
+  void do_deferred_zero_checks();
+};