--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/ci/ciMethodBlocks.hpp	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,121 @@
+/*
+ * Copyright 2006 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+
+class ciBlock;
+
+typedef short ciBlockIndex;
+
+class ciMethodBlocks : public ResourceObj {
+private:
+  ciMethod *_method;
+  Arena *_arena;
+  GrowableArray<ciBlock *>  *_blocks;
+  ciBlock  **_bci_to_block;
+  int _num_blocks;
+  int _code_size;
+
+  void do_analysis();
+public:
+  ciMethodBlocks(Arena *arena, ciMethod *meth);
+
+  ciBlock *block_containing(int bci);
+  ciBlock *block(int index)  { return _blocks->at(index); }
+  ciBlock *make_block_at(int bci);
+  ciBlock *split_block_at(int bci);
+  bool is_block_start(int bci);
+  int num_blocks()  { return _num_blocks;}
+  void clear_processed();
+
+#ifndef PRODUCT
+  void dump();
+#endif
+};
+
+class ciBlock : public ResourceObj {
+private:
+  int _idx;
+  int _start_bci;
+  int _limit_bci;
+  int _control_bci;
+  uint _flags;
+  int _ex_start_bci;
+  int _ex_limit_bci;
+#ifndef PRODUCT
+  ciMethod *_method;
+#endif
+  enum {
+    Processed   = (1 << 0),
+    Handler     = (1 << 1),
+    MayThrow    = (1 << 2),
+    DoesJsr     = (1 << 3),
+    DoesRet     = (1 << 4),
+    RetTarget   = (1 << 5),
+    HasHandler  = (1 << 6)
+  };
+
+
+public:
+  enum {
+    fall_through_bci = -1
+  };
+
+  ciBlock(ciMethod *method, int index, ciMethodBlocks *mb, int start_bci);
+  int start_bci() const         { return _start_bci; }
+  int limit_bci() const         { return _limit_bci; }
+  int control_bci() const       { return _control_bci; }
+  int index() const             { return _idx; }
+  void set_start_bci(int bci)   { _start_bci = bci; }
+  void set_limit_bci(int bci)   { _limit_bci = bci; }
+  void set_control_bci(int bci) { _control_bci = bci;}
+  void set_exception_range(int start_bci, int limit_bci);
+  int ex_start_bci() const      { return _ex_start_bci; }
+  int ex_limit_bci() const      { return _ex_limit_bci; }
+  bool contains(int bci) const { return start_bci() <= bci && bci < limit_bci(); }
+
+
+  // flag handling
+  bool  processed() const           { return (_flags & Processed) != 0; }
+  bool  is_handler() const          { return (_flags & Handler) != 0; }
+  bool  may_throw() const           { return (_flags & MayThrow) != 0; }
+  bool  does_jsr() const            { return (_flags & DoesJsr) != 0; }
+  bool  does_ret() const            { return (_flags & DoesRet) != 0; }
+  bool  has_handler() const         { return (_flags & HasHandler) != 0; }
+  bool  is_ret_target() const       { return (_flags & RetTarget) != 0; }
+  void  set_processed()             { _flags |= Processed; }
+  void  clear_processed()           { _flags &= ~Processed; }
+  void  set_handler()               { _flags |= Handler; }
+  void  set_may_throw()             { _flags |= MayThrow; }
+  void  set_does_jsr()              { _flags |= DoesJsr; }
+  void  clear_does_jsr()            { _flags &= ~DoesJsr; }
+  void  set_does_ret()              { _flags |= DoesRet; }
+  void  clear_does_ret()            { _flags |= DoesRet; }
+  void  set_is_ret_target()         { _flags |= RetTarget; }
+  void  set_has_handler()           { _flags |= HasHandler; }
+#ifndef PRODUCT
+  ciMethod *method() const          { return _method; }
+  void dump();
+  void print_on(outputStream* st) const  PRODUCT_RETURN;
+#endif
+};