diff -r 000000000000 -r f90c822e73f8 src/share/vm/ci/ciArray.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/vm/ci/ciArray.cpp	Wed Apr 27 01:25:04 2016 +0800
@@ -0,0 +1,121 @@
+/*
+ * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
+ * 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.
+ *
+ */
+
+#include "precompiled.hpp"
+#include "ci/ciArray.hpp"
+#include "ci/ciArrayKlass.hpp"
+#include "ci/ciConstant.hpp"
+#include "ci/ciKlass.hpp"
+#include "ci/ciUtilities.hpp"
+#include "oops/objArrayOop.hpp"
+#include "oops/typeArrayOop.hpp"
+
+// ciArray
+//
+// This class represents an arrayOop in the HotSpot virtual
+// machine.
+static BasicType fixup_element_type(BasicType bt) {
+  if (bt == T_ARRAY)    return T_OBJECT;
+  if (bt == T_BOOLEAN)  return T_BYTE;
+  return bt;
+}
+
+ciConstant ciArray::element_value_impl(BasicType elembt,
+                                       arrayOop ary,
+                                       int index) {
+  if (ary == NULL)
+    return ciConstant();
+  assert(ary->is_array(), "");
+  if (index < 0 || index >= ary->length())
+    return ciConstant();
+  ArrayKlass* ak = (ArrayKlass*) ary->klass();
+  BasicType abt = ak->element_type();
+  if (fixup_element_type(elembt) !=
+      fixup_element_type(abt))
+    return ciConstant();
+  switch (elembt) {
+  case T_ARRAY:
+  case T_OBJECT:
+    {
+      assert(ary->is_objArray(), "");
+      objArrayOop objary = (objArrayOop) ary;
+      oop elem = objary->obj_at(index);
+      ciEnv* env = CURRENT_ENV;
+      ciObject* box = env->get_object(elem);
+      return ciConstant(T_OBJECT, box);
+    }
+  }
+  assert(ary->is_typeArray(), "");
+  typeArrayOop tary = (typeArrayOop) ary;
+  jint value = 0;
+  switch (elembt) {
+  case T_LONG:          return ciConstant(tary->long_at(index));
+  case T_FLOAT:         return ciConstant(tary->float_at(index));
+  case T_DOUBLE:        return ciConstant(tary->double_at(index));
+  default:              return ciConstant();
+  case T_BYTE:          value = tary->byte_at(index);           break;
+  case T_BOOLEAN:       value = tary->byte_at(index) & 1;       break;
+  case T_SHORT:         value = tary->short_at(index);          break;
+  case T_CHAR:          value = tary->char_at(index);           break;
+  case T_INT:           value = tary->int_at(index);            break;
+  }
+  return ciConstant(elembt, value);
+}
+
+// ------------------------------------------------------------------
+// ciArray::element_value
+//
+// Current value of an element.
+// Returns T_ILLEGAL if there is no element at the given index.
+ciConstant ciArray::element_value(int index) {
+  BasicType elembt = element_basic_type();
+  GUARDED_VM_ENTRY(
+    return element_value_impl(elembt, get_arrayOop(), index);
+  )
+}
+
+// ------------------------------------------------------------------
+// ciArray::element_value_by_offset
+//
+// Current value of an element at the specified offset.
+// Returns T_ILLEGAL if there is no element at the given offset.
+ciConstant ciArray::element_value_by_offset(intptr_t element_offset) {
+  BasicType elembt = element_basic_type();
+  intptr_t shift  = exact_log2(type2aelembytes(elembt));
+  intptr_t header = arrayOopDesc::base_offset_in_bytes(elembt);
+  intptr_t index = (element_offset - header) >> shift;
+  intptr_t offset = header + ((intptr_t)index << shift);
+  if (offset != element_offset || index != (jint)index)
+    return ciConstant();
+  return element_value((jint) index);
+}
+
+// ------------------------------------------------------------------
+// ciArray::print_impl
+//
+// Implementation of the print method.
+void ciArray::print_impl(outputStream* st) {
+  st->print(" length=%d type=", length());
+  klass()->print(st);
+}